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Author SHA1 Message Date
Arnaldo Carvalho de Melo
eccb1b9363 perf test BPF: Fixup BPF test using epoll_pwait syscall function probe 
Since e145242ea0 ("syscalls/core, syscalls/x86: Clean up syscall stub
naming convention") changed the main syscall function for 'epoll_pwait'
to something other than the expected 'SyS_epoll_pwait the' 'perf test
BPF' entries started failing, fix it by using something called from the
main syscall function instead, 'epoll_wait', which should keep this test
working in older kernels too.

Before:

  # perf test BPF
  40: BPF filter                           :
  40.1: Basic BPF filtering                : FAILED!
  40.2: BPF pinning                        : Skip
  40.3: BPF prologue generation            : Skip
  40.4: BPF relocation checker             : Skip

If we use -v for that test we see the problem:

    Probe point 'SyS_epoll_pwait' not found.

After:

  # perf test BPF
  40: BPF filter                           :
  40.1: Basic BPF filtering                : Ok
  40.2: BPF pinning                        : Ok
  40.3: BPF prologue generation            : Ok
  40.4: BPF relocation checker             : Ok
  #

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Dominik Brodowski <linux@dominikbrodowski.net>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/r/tip-y24nmn70cs2am8jh4i344dng@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2018-04-18 15:35:53 -03:00
Arnaldo Carvalho de Melo
518c6021e9 perf tests mmap: Show which tracepoint is failing 
In the 'perf test "mmap interface"' we try creating events for several
tracepoints, but when perf_evsel__new() fails we're not showing which
one is failing, fix that to help diagnosing problems, such as the
syscall tracepoints ones being found and fixes in this merge window.

Now the failing tests shows:

  # perf test -v "mmap interface"
 4: Read samples using the mmap interface                 :
  --- start ---
  test child forked, pid 14311
  <SNIP>
  perf_evsel__new(sys_enter_getppid)
  test child finished with -1
  ---- end ----
  Read samples using the mmap interface: FAILED!
  #

Now to check why the syscalls:sys_enter_getppid is failing...

  # ls -la /sys/kernel/debug/tracing/events/syscalls/sys_enter_getppid
  ls: cannot access '/sys/kernel/debug/tracing/events/syscalls/sys_enter_getppid': No such file or directory
  #

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Dominik Brodowski <linux@dominikbrodowski.net>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-44xk0ycdzrfzx1o9rklf5itl@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2018-04-18 15:35:52 -03:00
Ravi Bangoria
66f5a0779a perf tools: Add '\n' at the end of parse-options error messages 
Few error messages does not have '\n' at the end and thus next prompt
gets printed in the same line. Ex,

  linux~$ perf buildid-cache -verbose --add ./a.out
   Error: did you mean `--verbose` (with two dashes ?)linux~$

Fix it.

Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kate Stewart <kstewart@linuxfoundation.org>
Cc: Krister Johansen <kjlx@templeofstupid.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Philippe Ombredanne <pombredanne@nexb.com>
Cc: Sihyeon Jang <uneedsihyeon@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20180417041346.5617-2-ravi.bangoria@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2018-04-18 15:35:51 -03:00
Andi Kleen
ccbb6afe08 perf record: Remove suggestion to enable APIC 
'perf record' suggests to enable the APIC on errors.

APIC is practically always used today and the problem is usually
somewhere else.

Just remove the outdated suggestion.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/20180406203812.3087-5-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2018-04-18 15:35:50 -03:00
Andi Kleen
ec3948451e perf record: Remove misleading error suggestion 
When perf record encounters an error setting up an event it suggests
to enable CONFIG_PERF_EVENTS. This is misleading because:

- Usually it is enabled (it is really hard to disable on x86)

- The problem is usually somewhere else, e.g. the CPU is not supported
or an invalid configuration has been used.

Remove the misleading suggestion.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/20180406203812.3087-4-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2018-04-18 15:35:49 -03:00
Andi Kleen
6a02f06ede perf hists browser: Clarify top/report browser help 
Clarify in the browser help that ESC in tui mode may go back to the
previous screen instead of just exiting (was not clear to me)

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/20180406203812.3087-3-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2018-04-18 15:35:49 -03:00
Andi Kleen
a7e9eab3db perf mem: Allow all record/report options 
For perf mem report / perf mem record, pass all unknown options
through to the underlying report/record commands. This makes things
like

perf mem record -a sleep 1

work. Matches how c2c and other tools work.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/20180406203812.3087-2-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2018-04-18 15:35:48 -03:00
Arnaldo Carvalho de Melo
4e5c01a7c7 perf trace: Support MAP_FIXED_NOREPLACE 
Introduced in a4ff8e8620 ("mm: introduce MAP_FIXED_NOREPLACE"), and
now that we have that define in the just syncronized
tools/arch/*/include/uapi/asm/mman.h files, add support for it.

This should really transition to autogeneration of string tables as
done for various other things:

  $ ls /tmp/build/perf/trace/beauty/generated/*.c
  arch_errno_name_array.c kcmp_type_array.c madvise_behavior_array.c
  pkey_alloc_access_rights_array.c prctl_option_array.c
  $ head /tmp/build/perf/trace/beauty/generated/madvise_behavior_array.c
  static const char *madvise_advices[] = {
	[0] = "NORMAL",
	[1] = "RANDOM",
	[2] = "SEQUENTIAL",
	[3] = "WILLNEED",
	[4] = "DONTNEED",
	[8] = "FREE",
	[9] = "REMOVE",
	[10] = "DONTFORK",
	[11] = "DOFORK",
  $

Till then, add support for this the old way.

Also it has to be ifdef'ed, because arches like mips still don't define
it. The proper solution will be to have per-arch tables for these
values to support cross-analysis.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-td9t5vhjltqnlzaurkkgq8cn@git.kernel.org
Signef-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2018-04-18 15:34:52 -03:00
Thomas Richter
038586c343 perf list: Add s390 support for detailed/verbose PMU event description 
'perf list' with flags -d and -v print a description (-d) or a very
verbose explanation (-v) of CPU specific counter events.  These
descriptions are provided with the json files in directory
pmu-events/arch/s390/*.json.

Display of these descriptions on s390 requires the corresponding json
files.

On s390 this does not work because function is_pmu_core() does not
detect the s390 directory name where the CPU specific events are listed.
On x86 it is:

  /sys/bus/event_source/devices/cpu

whereas on s390 it is:

  /sys/bus/event_source/devices/cpum_cf
  /sys/bus/event_source/devices/cpum_sf

Fix this by adding s390 directory name testing to function
is_pmu_core(). This is the same approach as taken for the ARM platform.

Output before:

[root@s35lp76 perf]# ./perf list -d pmu
List of pre-defined events (to be used in -e):

  cpum_cf/AES_BLOCKED_CYCLES/      [Kernel PMU event]
  cpum_cf/AES_BLOCKED_FUNCTIONS/   [Kernel PMU event]
  cpum_cf/AES_CYCLES/              [Kernel PMU event]
  cpum_cf/AES_FUNCTIONS/           [Kernel PMU event]
  ....
  cpum_cf/TX_NC_TEND/              [Kernel PMU event]
  cpum_cf/VX_BCD_EXECUTION_SLOTS/  [Kernel PMU event]
  cpum_sf/SF_CYCLES_BASIC/         [Kernel PMU event]

Output after:

[root@s35lp76 perf]# ./perf list -d pmu
List of pre-defined events (to be used in -e):

  cpum_cf/AES_BLOCKED_CYCLES/      [Kernel PMU event]
  cpum_cf/AES_BLOCKED_FUNCTIONS/   [Kernel PMU event]
  cpum_cf/AES_CYCLES/              [Kernel PMU event]
  cpum_cf/AES_FUNCTIONS/           [Kernel PMU event]
  ....
  cpum_cf/TX_NC_TEND/              [Kernel PMU event]
  cpum_cf/VX_BCD_EXECUTION_SLOTS/  [Kernel PMU event]
  cpum_sf/SF_CYCLES_BASIC/         [Kernel PMU event]

3906:
  bcd_dfp_execution_slots
       [BCD DFP Execution Slots]
  decimal_instructions
       [Decimal Instructions]
  dtlb2_gpage_writes
       [DTLB2 GPAGE Writes]
  dtlb2_hpage_writes
       [DTLB2 HPAGE Writes]
  dtlb2_misses
       [DTLB2 Misses]
  dtlb2_writes
       [DTLB2 Writes]
  itlb2_misses
       [ITLB2 Misses]
  itlb2_writes
       [ITLB2 Writes]
  l1c_tlb2_misses
       [L1C TLB2 Misses]
  .....

cfvn 3:
  cpu_cycles
       [CPU Cycles]
  instructions
       [Instructions]
  l1d_dir_writes
       [L1D Directory Writes]
  l1d_penalty_cycles
       [L1D Penalty Cycles]
  l1i_dir_writes
       [L1I Directory Writes]
  l1i_penalty_cycles
       [L1I Penalty Cycles]
  problem_state_cpu_cycles
       [Problem State CPU Cycles]
  problem_state_instructions
       [Problem State Instructions]
  ....

csvn generic:
  aes_blocked_cycles
       [AES Blocked Cycles]
  aes_blocked_functions
       [AES Blocked Functions]
  aes_cycles
       [AES Cycles]
  aes_functions
       [AES Functions]
  dea_blocked_cycles
       [DEA Blocked Cycles]
  dea_blocked_functions
       [DEA Blocked Functions]
  ....

Signed-off-by: Thomas Richter <tmricht@linux.vnet.ibm.com>
Reviewed-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Link: http://lkml.kernel.org/r/20180416132314.33249-1-tmricht@linux.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2018-04-17 09:47:39 -03:00
Alexey Budankov
bf30cc1882 perf script: Extend misc field decoding with switch out event type 
Append 'p' sign to 'S' tag designating the type of context switch out event so
'Sp' means preemption context switch. Documentation is extended to cover
new presentation changes.

  $ perf script --show-switch-events -F +misc -I -i perf.data:

          hdparm 4073 [004] U  762.198265:     380194 cycles:ppp:      7faf727f5a23 strchr (/usr/lib64/ld-2.26.so)
          hdparm 4073 [004] K  762.198366:     441572 cycles:ppp:  ffffffffb9218435 alloc_set_pte (/lib/modules/4.16.0-rc6+/build/vmlinux)
          hdparm 4073 [004] S  762.198391: PERF_RECORD_SWITCH_CPU_WIDE OUT          next pid/tid:    0/0
         swapper    0 [004]    762.198392: PERF_RECORD_SWITCH_CPU_WIDE IN           prev pid/tid: 4073/4073
         swapper    0 [004] Sp 762.198477: PERF_RECORD_SWITCH_CPU_WIDE OUT preempt  next pid/tid: 4073/4073
          hdparm 4073 [004]    762.198478: PERF_RECORD_SWITCH_CPU_WIDE IN           prev pid/tid:    0/0
         swapper    0 [007] K  762.198514:    2303073 cycles:ppp:  ffffffffb98b0c66 intel_idle (/lib/modules/4.16.0-rc6+/build/vmlinux)
         swapper    0 [007] Sp 762.198561: PERF_RECORD_SWITCH_CPU_WIDE OUT preempt  next pid/tid: 1134/1134
  kworker/u16:18 1134 [007]    762.198562: PERF_RECORD_SWITCH_CPU_WIDE IN           prev pid/tid:    0/0
  kworker/u16:18 1134 [007] S  762.198567: PERF_RECORD_SWITCH_CPU_WIDE OUT          next pid/tid:    0/0

Signed-off-by: Alexey Budankov <alexey.budankov@linux.intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/5fc65ce7-8ca5-53ae-8858-8ddd27290575@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2018-04-17 09:47:39 -03:00
Alexey Budankov
b3f35b5d5d perf report: Extend raw dump (-D) out with switch out event type 
Print additional 'preempt' tag for PERF_RECORD_SWITCH[_CPU_WIDE] OUT records when
event header misc field contains PERF_RECORD_MISC_SWITCH_OUT_PREEMPT bit set
designating preemption context switch out event:

tools/perf/perf report -D -i perf.data | grep _SWITCH

0 768361415226 0x27f076 [0x28]: PERF_RECORD_SWITCH_CPU_WIDE IN           prev pid/tid:     8/8
4 768362216813 0x28f45e [0x28]: PERF_RECORD_SWITCH_CPU_WIDE OUT          next pid/tid:     0/0
4 768362217824 0x28f486 [0x28]: PERF_RECORD_SWITCH_CPU_WIDE IN           prev pid/tid:  4073/4073
0 768362414027 0x27f0ce [0x28]: PERF_RECORD_SWITCH_CPU_WIDE OUT preempt  next pid/tid:     8/8
0 768362414367 0x27f0f6 [0x28]: PERF_RECORD_SWITCH_CPU_WIDE IN           prev pid/tid:     0/0

Signed-off-by: Alexey Budankov <alexey.budankov@linux.intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/6f5aebb9-b96c-f304-f08f-8f046d38de4f@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2018-04-17 09:47:39 -03:00
Alexey Budankov
101592b490 perf/core: Store context switch out type in PERF_RECORD_SWITCH[_CPU_WIDE] 
Store preempting context switch out event into Perf trace as a part of
PERF_RECORD_SWITCH[_CPU_WIDE] record.

Percentage of preempting and non-preempting context switches help
understanding the nature of workloads (CPU or IO bound) that are running
on a machine;

The event is treated as preemption one when task->state value of the
thread being switched out is TASK_RUNNING. Event type encoding is
implemented using PERF_RECORD_MISC_SWITCH_OUT_PREEMPT bit;

Signed-off-by: Alexey Budankov <alexey.budankov@linux.intel.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/9ff84e83-a0ca-dd82-a6d0-cb951689be74@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2018-04-17 09:47:39 -03:00
Ingo Molnar
e2f73a1828 tools/headers: Synchronize kernel ABI headers, v4.17-rc1 
Sync the following tooling headers with the latest kernel version:

  tools/arch/arm/include/uapi/asm/kvm.h
    - New ABI: KVM_REG_ARM_*

  tools/arch/x86/include/asm/required-features.h
    - Removal of NEED_LA57 dependency

  tools/arch/x86/include/uapi/asm/kvm.h
    - New KVM ABI: KVM_SYNC_X86_*

  tools/include/uapi/asm-generic/mman-common.h
    - New ABI: MAP_FIXED_NOREPLACE flag

  tools/include/uapi/linux/bpf.h
    - New ABI: BPF_F_SEQ_NUMBER functions

  tools/include/uapi/linux/if_link.h
    - New ABI: IFLA tun and rmnet support

  tools/include/uapi/linux/kvm.h
    - New ABI: hyperv eventfd and CONN_ID_MASK support plus header cleanups

  tools/include/uapi/sound/asound.h
    - New ABI: SNDRV_PCM_FORMAT_FIRST PCM format specifier

  tools/perf/arch/x86/entry/syscalls/syscall_64.tbl
    - The x86 system call table description changed due to the ptregs changes and the renames, in:

	d5a00528b5: syscalls/core, syscalls/x86: Rename struct pt_regs-based sys_*() to __x64_sys_*()
	5ac9efa3c5: syscalls/core, syscalls/x86: Clean up compat syscall stub naming convention
	ebeb8c82ff: syscalls/x86: Use 'struct pt_regs' based syscall calling for IA32_EMULATION and x32

Also fix the x86 syscall table warning:

  -Warning: Kernel ABI header at 'tools/arch/x86/entry/syscalls/syscall_64.tbl' differs from latest version at 'arch/x86/entry/syscalls/syscall_64.tbl'
  +Warning: Kernel ABI header at 'tools/perf/arch/x86/entry/syscalls/syscall_64.tbl' differs from latest version at 'arch/x86/entry/syscalls/syscall_64.tbl'

None of these changes impact existing tooling code, so we only have to copy the kernel version.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Starovoitov <alexei.starovoitov@gmail.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Brian Robbins <brianrob@microsoft.com>
Cc: Clark Williams <williams@redhat.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: David Ahern <dsahern@gmail.com>
Cc: Dmitriy Vyukov <dvyukov@google.com> <dvyukov@google.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Cc: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Kim Phillips <kim.phillips@arm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Li Zhijian <lizhijian@cn.fujitsu.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Martin Liška <mliska@suse.cz>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Matthias Kaehlcke <mka@chromium.org>
Cc: Miguel Bernal Marin <miguel.bernal.marin@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Cc: Sandipan Das <sandipan@linux.vnet.ibm.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Takuya Yamamoto <tkydevel@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Cc: Wang Nan <wangnan0@huawei.com>
Cc: William Cohen <wcohen@redhat.com>
Cc: Yonghong Song <yhs@fb.com>
Link: http://lkml.kernel.org/r/20180416064024.ofjtrz5yuu3ykhvl@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2018-04-17 09:47:39 -03:00
Ingo Molnar
aacd188a2d perf/core improvements and fixes: 
perf annotate:
 
 - Allow showing offsets in more than just jump targets, use the new
   'O' hotkey in the TUI, config ~/.perfconfig annotate.offset_level
   for it and for --stdio2 (Arnaldo Carvalho de Melo)
 
 - Use the resolved variable names from objdump disassembled lines to
   make them more compact, just like was already done for some instructions,
   like "mov", this eventually will be done more generally, but lets now add
   some more to the existing mechanism (Arnaldo Carvalho de Melo)
 
 perf record:
 
 - Change warning for missing topology sysfs entry to debug, as not all
   architectures have those files, s390 being one of those (Thomas Richter)
 
 perf sched:
 
 - Fix -g/--call-graph documentation (Takuya Yamamoto)
 
 perf stat:
 
 - Enable 1ms interval for printing event counters values in (Alexey Budankov)
 
 perf test:
 
 - Run dwarf unwind  on arm32 (Kim Phillips)
 
 - Remove unused ptrace.h include from LLVM test, sidesteping older
   clang's lack of support for some asm constructs (Arnaldo Carvalho de Melo)
 
 perf version:
 
 - Do not print info about HAVE_LIBAUDIT_SUPPORT in 'perf version --build-options'
   when HAVE_SYSCALL_TABLE_SUPPORT is true, as libaudit won't be used in that
   case, print info about syscall_table support instead (Jin Yao)
 
 Build system:
 
 - Use HAVE_..._SUPPORT used consistently (Jin Yao)
 
 - Restore READ_ONCE() C++ compatibility in tools/include (Mark Rutland)
 
 - Give hints about package names needed to build jvmti (Arnaldo Carvalho de Melo)
 
 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-core-for-mingo-4.17-20180413' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent

Pull tooling improvements and fixes from Arnaldo Carvalho de Melo:

perf annotate fixes and improvements:

- Allow showing offsets in more than just jump targets, use the new
  'O' hotkey in the TUI, config ~/.perfconfig annotate.offset_level
  for it and for --stdio2 (Arnaldo Carvalho de Melo)

- Use the resolved variable names from objdump disassembled lines to
  make them more compact, just like was already done for some instructions,
  like "mov", this eventually will be done more generally, but lets now add
  some more to the existing mechanism (Arnaldo Carvalho de Melo)

perf record fixes:

- Change warning for missing topology sysfs entry to debug, as not all
  architectures have those files, s390 being one of those (Thomas Richter)

perf sched fixes:

- Fix -g/--call-graph documentation (Takuya Yamamoto)

perf stat:

- Enable 1ms interval for printing event counters values in (Alexey Budankov)

perf test fixes:

- Run dwarf unwind  on arm32 (Kim Phillips)

- Remove unused ptrace.h include from LLVM test, sidesteping older
  clang's lack of support for some asm constructs (Arnaldo Carvalho de Melo)

perf version fixes:

- Do not print info about HAVE_LIBAUDIT_SUPPORT in 'perf version --build-options'
  when HAVE_SYSCALL_TABLE_SUPPORT is true, as libaudit won't be used in that
  case, print info about syscall_table support instead (Jin Yao)

Build system fixes:

- Use HAVE_..._SUPPORT used consistently (Jin Yao)

- Restore READ_ONCE() C++ compatibility in tools/include (Mark Rutland)

- Give hints about package names needed to build jvmti (Arnaldo Carvalho de Melo)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2018-04-16 08:15:22 +02:00
Linus Torvalds
ca71b3ba4c Kbuild updates for v4.17 (2nd) 
- pass HOSTLDFLAGS when compiling single .c host programs
 
 - build genksyms lexer and parser files instead of using shipped
   versions
 
 - rename *-asn1.[ch] to *.asn1.[ch] for suffix consistency
 
 - let the top .gitignore globally ignore artifacts generated by
   flex, bison, and asn1_compiler
 
 - let the top Makefile globally clean artifacts generated by
   flex, bison, and asn1_compiler
 
 - use safer .SECONDARY marker instead of .PRECIOUS to prevent
   intermediate files from being removed
 
 - support -fmacro-prefix-map option to make __FILE__ a relative path
 
 - fix # escaping to prepare for the future GNU Make release
 
 - clean up deb-pkg by using debian tools instead of handrolled
   source/changes generation
 
 - improve rpm-pkg portability by supporting kernel-install as a
   fallback of new-kernel-pkg
 
 - extend Kconfig listnewconfig target to provide more information
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Merge tag 'kbuild-v4.17-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull more Kbuild updates from Masahiro Yamada:

 - pass HOSTLDFLAGS when compiling single .c host programs

 - build genksyms lexer and parser files instead of using shipped
   versions

 - rename *-asn1.[ch] to *.asn1.[ch] for suffix consistency

 - let the top .gitignore globally ignore artifacts generated by flex,
   bison, and asn1_compiler

 - let the top Makefile globally clean artifacts generated by flex,
   bison, and asn1_compiler

 - use safer .SECONDARY marker instead of .PRECIOUS to prevent
   intermediate files from being removed

 - support -fmacro-prefix-map option to make __FILE__ a relative path

 - fix # escaping to prepare for the future GNU Make release

 - clean up deb-pkg by using debian tools instead of handrolled
   source/changes generation

 - improve rpm-pkg portability by supporting kernel-install as a
   fallback of new-kernel-pkg

 - extend Kconfig listnewconfig target to provide more information

* tag 'kbuild-v4.17-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
  kconfig: extend output of 'listnewconfig'
  kbuild: rpm-pkg: use kernel-install as a fallback for new-kernel-pkg
  Kbuild: fix # escaping in .cmd files for future Make
  kbuild: deb-pkg: split generating packaging and build
  kbuild: use -fmacro-prefix-map to make __FILE__ a relative path
  kbuild: mark $(targets) as .SECONDARY and remove .PRECIOUS markers
  kbuild: rename *-asn1.[ch] to *.asn1.[ch]
  kbuild: clean up *-asn1.[ch] patterns from top-level Makefile
  .gitignore: move *-asn1.[ch] patterns to the top-level .gitignore
  kbuild: add %.dtb.S and %.dtb to 'targets' automatically
  kbuild: add %.lex.c and %.tab.[ch] to 'targets' automatically
  genksyms: generate lexer and parser during build instead of shipping
  kbuild: clean up *.lex.c and *.tab.[ch] patterns from top-level Makefile
  .gitignore: move *.lex.c *.tab.[ch] patterns to the top-level .gitignore
  kbuild: use HOSTLDFLAGS for single .c executables
 2018-04-15 17:21:30 -07:00
Linus Torvalds
174e719439 Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull more perf updates from Thomas Gleixner:
 "A rather large set of perf updates:

  Kernel:

   - Fix various initialization issues

   - Prevent creating [ku]probes for not CAP_SYS_ADMIN users

  Tooling:

   - Show only failing syscalls with 'perf trace --failure' (Arnaldo
     Carvalho de Melo)

            e.g: See what 'openat' syscalls are failing:

        # perf trace --failure -e openat
         762.323 ( 0.007 ms): VideoCapture/4566 openat(dfd: CWD, filename: /dev/video2) = -1 ENOENT No such file or directory
         <SNIP N /dev/videoN open attempts... sigh, where is that improvised camera lid?!? >
         790.228 ( 0.008 ms): VideoCapture/4566 openat(dfd: CWD, filename: /dev/video63) = -1 ENOENT No such file or directory
        ^C#

   - Show information about the event (freq, nr_samples, total
     period/nr_events) in the annotate --tui and --stdio2 'perf
     annotate' output, similar to the first line in the 'perf report
     --tui', but just for the samples for a the annotated symbol
     (Arnaldo Carvalho de Melo)

   - Introduce 'perf version --build-options' to show what features were
     linked, aliased as well as a shorter 'perf -vv' (Jin Yao)

   - Add a "dso_size" sort order (Kim Phillips)

   - Remove redundant ')' in the tracepoint output in 'perf trace'
     (Changbin Du)

   - Synchronize x86's cpufeatures.h, no effect on toolss (Arnaldo
     Carvalho de Melo)

   - Show group details on the title line in the annotate browser and
     'perf annotate --stdio2' output, so that the per-event columns can
     have headers (Arnaldo Carvalho de Melo)

   - Fixup vertical line separating metrics from instructions and
     cleaning unused lines at the bottom, both in the annotate TUI
     browser (Arnaldo Carvalho de Melo)

   - Remove duplicated 'samples' in lost samples warning in
     'perf report' (Arnaldo Carvalho de Melo)

   - Synchronize i915_drm.h, silencing the perf build process,
     automagically adding support for the new DRM_I915_QUERY ioctl
     (Arnaldo Carvalho de Melo)

   - Make auxtrace_queues__add_buffer() allocate struct buffer, from a
     patchkit already applied (Adrian Hunter)

   - Fix the --stdio2/TUI annotate output to include group details, be
     it for a recorded '{a,b,f}' explicit event group or when forcing
     group display using 'perf report --group' for a set of events not
     recorded as a group (Arnaldo Carvalho de Melo)

   - Fix display artifacts in the ui browser (base class for the
     annotate and main report/top TUI browser) related to the extra
     title lines work (Arnaldo Carvalho de Melo)

   - perf auxtrace refactorings, leftovers from a previously partially
     processed patchset (Adrian Hunter)

   - Fix the builtin clang build (Sandipan Das, Arnaldo Carvalho de
     Melo)

   - Synchronize i915_drm.h, silencing a perf build warning and in the
     process automagically adding support for a new ioctl command
     (Arnaldo Carvalho de Melo)

   - Fix a strncpy issue in uprobe tracing"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (36 commits)
  perf/core: Need CAP_SYS_ADMIN to create k/uprobe with perf_event_open()
  tracing/uprobe_event: Fix strncpy corner case
  perf/core: Fix perf_uprobe_init()
  perf/core: Fix perf_kprobe_init()
  perf/core: Fix use-after-free in uprobe_perf_close()
  perf tests clang: Fix function name for clang IR test
  perf clang: Add support for recent clang versions
  perf tools: Fix perf builds with clang support
  perf tools: No need to include namespaces.h in util.h
  perf hists browser: Remove leftover from row returned from refresh
  perf hists browser: Show extra_title_lines in the 'D' debug hotkey
  perf auxtrace: Make auxtrace_queues__add_buffer() do CPU filtering
  tools headers uapi: Synchronize i915_drm.h
  perf report: Remove duplicated 'samples' in lost samples warning
  perf ui browser: Fixup cleaning unused lines at the bottom
  perf annotate browser: Fixup vertical line separating metrics from instructions
  perf annotate: Show group details on the title line
  perf auxtrace: Make auxtrace_queues__add_buffer() allocate struct buffer
  perf/x86/intel: Move regs->flags EXACT bit init
  perf trace: Remove redundant ')'
  ...
 2018-04-15 12:36:31 -07:00
Arnaldo Carvalho de Melo
b0d5c81e87 perf annotate: Handle variables in 'sub', 'or' and many other instructions 
Just like is done for 'mov' and others that can have as source or
targets variables resolved by objdump, to make them more compact:

-               orb    $0x4,0x224d71(%rip)        # 226ca4 <_rtld_global+0xca4>
+               orb    $0x4,_rtld_global+0xca4

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Martin Liška <mliska@suse.cz>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Cc: Thomas Richter <tmricht@linux.vnet.ibm.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-efex7746id4w4wa03nqxvh3m@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2018-04-13 10:00:05 -03:00
Arnaldo Carvalho de Melo
43c4023152 perf annotate: Allow setting the offset level in .perfconfig 
The default is 1 (jump_target):

  # perf annotate --ignore-vmlinux --stdio2 _raw_spin_lock_irqsave
  Samples: 3K of event 'cycles:ppp', 3000 Hz, Event count (approx.): 2766398574
  _raw_spin_lock_irqsave() /proc/kcore
    0.26        nop
    4.61        push   %rbx
   19.33        pushfq
    7.97        pop    %rax
    0.32        nop
    0.06        mov    %rax,%rbx
   14.63        cli
    0.06        nop
                xor    %eax,%eax
                mov    $0x1,%edx
   49.94        lock   cmpxchg %edx,(%rdi)
    0.16        test   %eax,%eax
              ↓ jne    2b
    2.66        mov    %rbx,%rax
                pop    %rbx
              ← retq
          2b:   mov    %eax,%esi
              → callq  *ffffffffb30eaed0
                mov    %rbx,%rax
                pop    %rbx
              ← retq
  #

But one can ask for showing offsets for call instructions by setting
this:

  # perf annotate --ignore-vmlinux --stdio2 _raw_spin_lock_irqsave
  Samples: 3K of event 'cycles:ppp', 3000 Hz, Event count (approx.): 2766398574
  _raw_spin_lock_irqsave() /proc/kcore
    0.26        nop
    4.61        push   %rbx
   19.33        pushfq
    7.97        pop    %rax
    0.32        nop
    0.06        mov    %rax,%rbx
   14.63        cli
    0.06        nop
                xor    %eax,%eax
                mov    $0x1,%edx
   49.94        lock   cmpxchg %edx,(%rdi)
    0.16        test   %eax,%eax
              ↓ jne    2b
    2.66        mov    %rbx,%rax
                pop    %rbx
              ← retq
          2b:   mov    %eax,%esi
          2d: → callq  *ffffffffb30eaed0
                mov    %rbx,%rax
                pop    %rbx
              ← retq
  #

Or using a big value to ask for all offsets to be shown:

  # cat ~/.perfconfig
  [annotate]

	offset_level = 100

	hide_src_code = true
  # perf annotate --ignore-vmlinux --stdio2 _raw_spin_lock_irqsave
  Samples: 3K of event 'cycles:ppp', 3000 Hz, Event count (approx.): 2766398574
  _raw_spin_lock_irqsave() /proc/kcore
    0.26   0:   nop
    4.61   5:   push   %rbx
   19.33   6:   pushfq
    7.97   7:   pop    %rax
    0.32   8:   nop
    0.06   d:   mov    %rax,%rbx
   14.63  10:   cli
    0.06  11:   nop
          17:   xor    %eax,%eax
          19:   mov    $0x1,%edx
   49.94  1e:   lock   cmpxchg %edx,(%rdi)
    0.16  22:   test   %eax,%eax
          24: ↓ jne    2b
    2.66  26:   mov    %rbx,%rax
          29:   pop    %rbx
          2a: ← retq
          2b:   mov    %eax,%esi
          2d: → callq  *ffffffffb30eaed0
          32:   mov    %rbx,%rax
          35:   pop    %rbx
          36: ← retq
   #

This also affects the TUI, i.e. the default 'perf annotate' and 'perf
top/report' -> A hotkey -> annotate interfaces, when slang-devel is present
in the build, i.e.:

  # perf version --build-options | grep slang
              libslang: [ on  ]  # HAVE_SLANG_SUPPORT
  #

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Martin Liška <mliska@suse.cz>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Cc: Thomas Richter <tmricht@linux.vnet.ibm.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-venm6x5zrt40eu8hxdsmqxz6@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2018-04-13 10:00:05 -03:00
Arnaldo Carvalho de Melo
7b366142a5 perf report: Fix switching to another perf.data file 
In the TUI the 's' hotkey can be used to switch to another perf.data
file in the current directory, but that got broken in Fixes:
b01141f4f5 ("perf annotate: Initialize the priv are in symbol__new()"),
that would show this once another file was chosen:

    ┌─Fatal Error─────────────────────────────────────┐
    │Annotation needs to be init before symbol__init()│
    │                                                 │
    │                                                 │
    │Press any key...                                 │
    └─────────────────────────────────────────────────┘

Fix it by just silently bailing out if symbol__annotation_init() was already
called, just like is done with symbol__init(), i.e. they are done just once at
session start, not when switching to a new perf.data file.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Martin Liška <mliska@suse.cz>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Cc: Thomas Richter <tmricht@linux.vnet.ibm.com>
Cc: Wang Nan <wangnan0@huawei.com>
Fixes: b01141f4f5 ("perf annotate: Initialize the priv are in symbol__new()")
Link: https://lkml.kernel.org/n/tip-ogppdtpzfax7y1h6gjdv5s6u@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2018-04-13 10:00:04 -03:00
Thomas Richter
4f75f1cbf9 perf record: Change warning for missing sysfs entry to debug 
Using perf on 4.16.0 kernel on s390 shows this warning:

   failed: can't open node sysfs data

each time I run command perf record ... for example:

  [root@s35lp76 perf]# ./perf record -e rB0000 -- sleep 1
  [ perf record: Woken up 1 times to write data ]
  failed: can't open node sysfs data
  [ perf record: Captured and wrote 0.001 MB perf.data (4 samples) ]
  [root@s35lp76 perf]#

It turns out commit e2091cedd5 ("perf tools: Add MEM_TOPOLOGY feature
to perf data file") tries to open directory named /sys/devices/system/node/
which does not exist on s390.

This is the call stack:
 __cmd_record
 +---> perf_session__write_header
       +---> perf_header__adds_write
             +---> do_write_feat
	           +---> write_mem_topology
		         +---> build_mem_topology
			       prints warning

The issue starts in do_write_feat() which unconditionally loops over all
features and now includes HEADER_MEM_TOPOLOGY and calls write_mem_topology().

Function record__init_features() at the beginning of __cmd_record() sets
all features and then turns off some of them.

Fix this by changing the warning to a level 2 debug output statement.

So it is only shown when debug level 2 or higher is set.

Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Link: http://lkml.kernel.org/r/20180412133246.92801-1-tmricht@linux.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2018-04-13 09:59:56 -03:00
Alexey Dobriyan
ee9294d6dd proc: fixup copyright sign 
Add copyright in two files before they get autorubberstamped.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2018-04-12 20:52:25 -07:00
Sandipan Das
4b163ca343 perf tests: Disable breakpoint accounting test for powerpc 
We disable this test as instruction breakpoints (HW_BREAKPOINT_X) are
not available for powerpc.

Before applying patch:

  21: Breakpoint accounting                                 :
  --- start ---
  test child forked, pid 3635
  failed opening event 0
  failed opening event 0
  watchpoints count 1, breakpoints count 0, has_ioctl 1, share 0
  test child finished with -2
  ---- end ----
  Breakpoint accounting: Skip

After applying patch:

  21: Breakpoint accounting                                 : Disabled

Signed-off-by: Sandipan Das <sandipan@linux.vnet.ibm.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Cc: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/20180412162140.2992-1-sandipan@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2018-04-12 14:20:21 -03:00
Takuya Yamamoto
e8103e44ce perf sched: Fix documentation for timehist 
Fixed a incorrect option and usage to those shown by "perf sched timehist -h",
i.e. the default is really --call-graph, which is equivalent to -g.

Signed-off-by: Takuya Yamamoto <tkydevel@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lkml.kernel.org/n/tip-8fzo0dlsi1mku5aqx8brep5s@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2018-04-12 10:33:36 -03:00
Jin Yao
8a812bf552 perf version: Print status for syscall_table 
This patch doesn't print "libaudit" line if HAVE_SYSCALL_TABLE_SUPPORT
is available and add a line for HAVE_SYSCALL_TABLE_SUPPORT.

For example,

$ ./perf -vv
perf version 4.13.rc5.gc2f8af9
                 dwarf: [ on  ]  # HAVE_DWARF_SUPPORT
    dwarf_getlocations: [ on  ]  # HAVE_DWARF_GETLOCATIONS_SUPPORT
                 glibc: [ on  ]  # HAVE_GLIBC_SUPPORT
                  gtk2: [ on  ]  # HAVE_GTK2_SUPPORT
         syscall_table: [ on  ]  # HAVE_SYSCALL_TABLE_SUPPORT
                libbfd: [ on  ]  # HAVE_LIBBFD_SUPPORT
                libelf: [ on  ]  # HAVE_LIBELF_SUPPORT
               libnuma: [ on  ]  # HAVE_LIBNUMA_SUPPORT
numa_num_possible_cpus: [ on  ]  # HAVE_LIBNUMA_SUPPORT
               libperl: [ on  ]  # HAVE_LIBPERL_SUPPORT
             libpython: [ on  ]  # HAVE_LIBPYTHON_SUPPORT
              libslang: [ on  ]  # HAVE_SLANG_SUPPORT
             libcrypto: [ on  ]  # HAVE_LIBCRYPTO_SUPPORT
             libunwind: [ on  ]  # HAVE_LIBUNWIND_SUPPORT
    libdw-dwarf-unwind: [ on  ]  # HAVE_DWARF_SUPPORT
                  zlib: [ on  ]  # HAVE_ZLIB_SUPPORT
                  lzma: [ on  ]  # HAVE_LZMA_SUPPORT
             get_cpuid: [ on  ]  # HAVE_AUXTRACE_SUPPORT
                   bpf: [ on  ]  # HAVE_LIBBPF_SUPPORT

The line "syscall_table: [ on  ]  # HAVE_SYSCALL_TABLE_SUPPORT" is
new created.

Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Suggested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1523269609-28824-4-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2018-04-12 10:33:34 -03:00
Jin Yao
22e9af4e94 perf tools: Rename HAVE_SYSCALL_TABLE to HAVE_SYSCALL_TABLE_SUPPORT 
To be consistent with other HAVE_XXX_SUPPORT uses in Makefile.config,
this patch renames HAVE_SYSCALL_TABLE to HAVE_SYSCALL_TABLE_SUPPORT and
updates the C code accordingly.

Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Suggested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1523269609-28824-3-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2018-04-12 10:33:31 -03:00
Jin Yao
90ce61b919 perf script: Use HAVE_LIBXXX_SUPPORT to replace NO_LIBXXX 
In Makefile.config, we define the conditional compilation variables
HAVE_LIBPERL_SUPPORT and HAVE_LIBPYTHON_SUPPORT.

To make the C code more consistent, this patch replaces
NO_LIBPERL/NO_LIBPYTHON in C code with HAVE_LIBPERL_SUPPORT/
HAVE_LIBPYTHON_SUPPORT.

Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Suggested-by: Ingo Molnar <mingo@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1523269609-28824-2-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2018-04-12 10:33:29 -03:00
Arnaldo Carvalho de Melo
c13009c1ef perf tests bpf: Remove unused ptrace.h include from LLVM test 
The bpf-script-test-kbuild.c script, used in one of the LLVM subtests,
includes ptrace.h unnecessarily, and that ends up making it include a
header that uses asm(_ASM_SP), a feature that is not supported by clang
<= 4.0, breaking that 'perf test' entry.

This ended up leading to the ca26cffa4e ("x86/asm: Allow again using
asm.h when building for the 'bpf' clang target"), adding an ifndef
__BPF__ to the arch/x86/include/asm/asm.h file.

Newer clang versions accept that asm(_ASM_SP) construct, so just remove
the ptrace.h include, which paves the way for reverting ca26cffa4e
("x86/asm: Allow again using asm.h when building for the 'bpf' clang
target").

Suggested-by: Yonghong Song <yhs@fb.com>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lkml.kernel.org/r/613f0a0d-c433-8f4d-dcc1-c9889deae39e@fb.com
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Alexei Starovoitov <alexei.starovoitov@gmail.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: David Ahern <dsahern@gmail.com>
Cc: Dmitriy Vyukov <dvyukov@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matthias Kaehlcke <mka@chromium.org>
Cc: Miguel Bernal Marin <miguel.bernal.marin@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-clbcnzbakdp18ibme4wt43ib@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2018-04-12 10:33:24 -03:00
Arnaldo Carvalho de Melo
e14b733c5d perf jvmti: Give hints about package names needed to build 
Give as examples of package names to install to have this built for
fedora and debian, to help the user a bit.

The part from 'e.g.:' onwards:

  No openjdk development package found, please install JDK package, e.g. openjdk-8-jdk, java-1.8.0-openjdk-devel

Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: William Cohen <wcohen@redhat.com>
Link: https://lkml.kernel.org/n/tip-edbi4r2pvzn7no6ebxbtczng@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2018-04-12 10:33:17 -03:00
Arnaldo Carvalho de Melo
51f39603b5 perf annotate browser: Allow showing offsets in more than just jump targets 
Jesper wanted to see offsets at callq sites when doing some performance
investigation related to retpolines, so save him some time by providing
a 'O' hotkey to allow showing offsets from function start at call
instructions or in all instructions, just go on pressing 'O' till the
offsets you need appear.

Example:

Starts with:

Samples: 64  of event 'cycles:ppp', 100000 Hz, Event count (approx.): 318963
ixgbe_read_reg  /proc/kcore
Percent│    ↑ je     2a
       │   ┌──cmp    $0xffffffff,%r13d
       │   ├──je     d0
       │   │  mov    $0x53e3,%edi
       │   │→ callq  __const_udelay
       │   │  sub    $0x1,%r15d
       │   │↑ jne    83
       │   │  mov    0x8(%rbp),%rax
       │   │  testb  $0x20,0x1799(%rax)
       │   │↑ je     2a
       │   │  mov    0x200(%rax),%rdi
       │   │  mov    %r13d,%edx
       │   │  mov    $0xffffffffc02595d8,%rsi
       │   │→ callq  netdev_warn
       │   │↑ jmpq   2a
       │d0:└─→mov    0x8(%rbp),%rsi
       │      mov    %rbp,%rdi
       │      mov    %eax,0x4(%rsp)
       │    → callq  ixgbe_remove_adapter.isra.77
       │      mov    0x4(%rsp),%eax
Press 'h' for help on key bindings
============================================================================

Pess 'O':

Samples: 64  of event 'cycles:ppp', 100000 Hz, Event count (approx.): 318963
ixgbe_read_reg  /proc/kcore
Percent│    ↑ je     2a
       │   ┌──cmp    $0xffffffff,%r13d
       │   ├──je     d0
       │   │  mov    $0x53e3,%edi
       │99:│→ callq  __const_udelay
       │   │  sub    $0x1,%r15d
       │   │↑ jne    83
       │   │  mov    0x8(%rbp),%rax
       │   │  testb  $0x20,0x1799(%rax)
       │   │↑ je     2a
       │   │  mov    0x200(%rax),%rdi
       │   │  mov    %r13d,%edx
       │   │  mov    $0xffffffffc02595d8,%rsi
       │c6:│→ callq  netdev_warn
       │   │↑ jmpq   2a
       │d0:└─→mov    0x8(%rbp),%rsi
       │      mov    %rbp,%rdi
       │      mov    %eax,0x4(%rsp)
       │db: → callq  ixgbe_remove_adapter.isra.77
       │      mov    0x4(%rsp),%eax
Press 'h' for help on key bindings
============================================================================

Press 'O' again:

Samples: 64  of event 'cycles:ppp', 100000 Hz, Event count (approx.): 318963
ixgbe_read_reg  /proc/kcore
Percent│8c: ↑ je     2a
       │8e:┌──cmp    $0xffffffff,%r13d
       │92:├──je     d0
       │94:│  mov    $0x53e3,%edi
       │99:│→ callq  __const_udelay
       │9e:│  sub    $0x1,%r15d
       │a2:│↑ jne    83
       │a4:│  mov    0x8(%rbp),%rax
       │a8:│  testb  $0x20,0x1799(%rax)
       │af:│↑ je     2a
       │b5:│  mov    0x200(%rax),%rdi
       │bc:│  mov    %r13d,%edx
       │bf:│  mov    $0xffffffffc02595d8,%rsi
       │c6:│→ callq  netdev_warn
       │cb:│↑ jmpq   2a
       │d0:└─→mov    0x8(%rbp),%rsi
       │d4:   mov    %rbp,%rdi
       │d7:   mov    %eax,0x4(%rsp)
       │db: → callq  ixgbe_remove_adapter.isra.77
       │e0:   mov    0x4(%rsp),%eax
Press 'h' for help on key bindings
============================================================================

Press 'O' again and it will show just jump target offsets.

Suggested-by: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexei Starovoitov <alexei.starovoitov@gmail.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Martin Liška <mliska@suse.cz>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Cc: Thomas Richter <tmricht@linux.vnet.ibm.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-upp6pfdetwlsx18ec2uf1od4@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2018-04-12 10:33:09 -03:00
Arnaldo Carvalho de Melo
592c10e217 perf annotate: Allow showing offsets in more than just jump targets 
Jesper wanted to see offsets at callq sites when doing some performance
investigation related to retpolines, so save him some time by providing
an 'struct annotation_options' to control where offsets should appear:
just on jump targets? That + call instructions? All?

This puts in place the logic to show the offsets, now we need to wire
this up in the TUI browser (next patch) and on the 'perf annotate --stdio2"
interface, where we need a more general mechanism to setup the
'annotation_options' struct from the command line.

Suggested-by: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexei Starovoitov <alexei.starovoitov@gmail.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Martin Liška <mliska@suse.cz>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Cc: Thomas Richter <tmricht@linux.vnet.ibm.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-m3jc9c3swobye9tj08gnh5i7@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2018-04-12 10:32:39 -03:00
Kim Phillips
af72cfb80a perf tests: Run dwarf unwind test on arm32 
Enable the unwind test on arm32:

  $ perf test unwind
  58: DWARF unwind                                          : Ok

Signed-off-by: Kim Phillips <kim.phillips@arm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Brian Robbins <brianrob@microsoft.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180410191624.a3a468670dd4548c66d3d094@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2018-04-12 09:30:37 -03:00
Mark Rutland
4d3b57da15 tools headers: Restore READ_ONCE() C++ compatibility 
Our userspace <linux/compiler.h> defines READ_ONCE() in a way that clang
doesn't like, as we have an anonymous union in which neither field is
initialized.

WRITE_ONCE() is fine since it initializes the __val field. For
READ_ONCE() we can keep clang and GCC happy with a dummy initialization
of the __c field, so let's do that.

At the same time, let's split READ_ONCE() and WRITE_ONCE() over several
lines for legibility, as we do in the in-kernel <linux/compiler.h>.

Reported-by: Li Zhijian <lizhijian@cn.fujitsu.com>
Reported-by: Sandipan Das <sandipan@linux.vnet.ibm.com>
Tested-by: Sandipan Das <sandipan@linux.vnet.ibm.com>
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Fixes: 6aa7de0591 ("locking/atomics: COCCINELLE/treewide: Convert trivial ACCESS_ONCE() patterns to READ_ONCE()/WRITE_ONCE()")
Link: http://lkml.kernel.org/r/20180404163445.16492-1-mark.rutland@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2018-04-12 09:30:09 -03:00
Alexey Budankov
9dc9a95f03 perf stat: Enable 1ms interval for printing event counters values 
Currently print count interval for performance counters values is
limited by 10ms so reading the values at frequencies higher than 100Hz
is restricted by the tool.

This change makes perf stat -I possible on frequencies up to 1KHz and,
to some extent, makes perf stat -I to be on-par with perf record
sampling profiling.

When running perf stat -I for monitoring e.g. PCIe uncore counters and
at the same time profiling some I/O workload by perf record e.g. for
cpu-cycles and context switches, it is then possible to observe
consolidated CPU/OS/IO(Uncore) performance picture for that workload.

Tool overhead warning printed when specifying -v option can be missed
due to screen scrolling in case you have output to the console
so message is moved into help available by running perf stat -h.

Signed-off-by: Alexey Budankov <alexey.budankov@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/b842ad6a-d606-32e4-afe5-974071b5198e@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2018-04-12 09:29:31 -03:00
Linus Torvalds
9697376759 These commits have either been sitting in my INBOX or have been 
in my local tree for some time. I need to push them upstream:
 
  - Separate out config-bisect.pl from ktest.pl.
    This allows users to do config bisects without full ktest setup.
 
  - Email on status change.
    Allow the user to be emailed on test start, finish, failure, etc.
 
  - Other small fixes and enhancements
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Merge tag 'ktest-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-ktest

Pull ktest updates from Steven Rostedt:
 "These commits have either been sitting in my INBOX or have been in my
  local tree for some time. I need to push them upstream:

   - Separate out config-bisect.pl from ktest.pl.

     This allows users to do config bisects without full ktest setup.

   - Email on status change.

     Allow the user to be emailed on test start, finish, failure, etc.

   - Other small fixes and enhancements"

* tag 'ktest-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-ktest: (24 commits)
  ktest: Take submenu into account for grub2 menus
  ktest.pl: Add MAIL_COMMAND option to define how to send email
  ktest.pl: Use run_command to execute sending mail
  ktest.pl: Allow dodie be recursive
  ktest.pl: Kill test if mailer is not supported
  ktest.pl: Add MAIL_PATH option to define where to find the mailer
  ktest.pl: No need to print no mailer is specified when mailto is not
  Ktest: add email options to sample.config
  Ktest: Use dodie for critical falures
  Ktest: Add SigInt handling
  Ktest: Add email support
  ktest.pl: Detect if a config-bisect was interrupted
  ktest.pl: Make finding config-bisect.pl dynamic
  ktest.pl: Have ktest.pl pass -r to config-bisect.pl to reset bisect
  ktest.pl: Use diffconfig if available for failed config bisects
  ktest.pl: Allow for the config-bisect.pl output to display to console
  ktest: Use config-bisect.pl in ktest.pl
  ktest: Add standalone config-bisect.pl program
  ktest: Set do_not_reboot=y for CONFIG_BISECT_TYPE=build
  ktest: Set buildonly=1 for CONFIG_BISECT_TYPE=build
  ...
 2018-04-11 16:42:27 -07:00
Matthew Wilcox
f6bb2a2c0b xarray: add the xa_lock to the radix_tree_root 
This results in no change in structure size on 64-bit machines as it
fits in the padding between the gfp_t and the void *.  32-bit machines
will grow the structure from 8 to 12 bytes.  Almost all radix trees are
protected with (at least) a spinlock, so as they are converted from
radix trees to xarrays, the data structures will shrink again.

Initialising the spinlock requires a name for the benefit of lockdep, so
RADIX_TREE_INIT() now needs to know the name of the radix tree it's
initialising, and so do IDR_INIT() and IDA_INIT().

Also add the xa_lock() and xa_unlock() family of wrappers to make it
easier to use the lock.  If we could rely on -fplan9-extensions in the
compiler, we could avoid all of this syntactic sugar, but that wasn't
added until gcc 4.6.

Link: http://lkml.kernel.org/r/20180313132639.17387-8-willy@infradead.org
Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Cc: Darrick J. Wong <darrick.wong@oracle.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2018-04-11 10:28:39 -07:00
Matthew Wilcox
fa290cda10 radix tree: use GFP_ZONEMASK bits of gfp_t for flags 
Patch series "XArray", v9.  (First part thereof).

This patchset is, I believe, appropriate for merging for 4.17.  It
contains the XArray implementation, to eventually replace the radix
tree, and converts the page cache to use it.

This conversion keeps the radix tree and XArray data structures in sync
at all times.  That allows us to convert the page cache one function at
a time and should allow for easier bisection.  Other than renaming some
elements of the structures, the data structures are fundamentally
unchanged; a radix tree walk and an XArray walk will touch the same
number of cachelines.  I have changes planned to the XArray data
structure, but those will happen in future patches.

Improvements the XArray has over the radix tree:

 - The radix tree provides operations like other trees do; 'insert' and
   'delete'. But what most users really want is an automatically
   resizing array, and so it makes more sense to give users an API that
   is like an array -- 'load' and 'store'. We still have an 'insert'
   operation for users that really want that semantic.

 - The XArray considers locking as part of its API. This simplifies a
   lot of users who formerly had to manage their own locking just for
   the radix tree. It also improves code generation as we can now tell
   RCU that we're holding a lock and it doesn't need to generate as much
   fencing code. The other advantage is that tree nodes can be moved
   (not yet implemented).

 - GFP flags are now parameters to calls which may need to allocate
   memory. The radix tree forced users to decide what the allocation
   flags would be at creation time. It's much clearer to specify them at
   allocation time.

 - Memory is not preloaded; we don't tie up dozens of pages on the off
   chance that the slab allocator fails. Instead, we drop the lock,
   allocate a new node and retry the operation. We have to convert all
   the radix tree, IDA and IDR preload users before we can realise this
   benefit, but I have not yet found a user which cannot be converted.

 - The XArray provides a cmpxchg operation. The radix tree forces users
   to roll their own (and at least four have).

 - Iterators take a 'max' parameter. That simplifies many users and will
   reduce the amount of iteration done.

 - Iteration can proceed backwards. We only have one user for this, but
   since it's called as part of the pagefault readahead algorithm, that
   seemed worth mentioning.

 - RCU-protected pointers are not exposed as part of the API. There are
   some fun bugs where the page cache forgets to use rcu_dereference()
   in the current codebase.

 - Value entries gain an extra bit compared to radix tree exceptional
   entries. That gives us the extra bit we need to put huge page swap
   entries in the page cache.

 - Some iterators now take a 'filter' argument instead of having
   separate iterators for tagged/untagged iterations.

The page cache is improved by this:

 - Shorter, easier to read code

 - More efficient iterations

 - Reduction in size of struct address_space

 - Fewer walks from the top of the data structure; the XArray API
   encourages staying at the leaf node and conducting operations there.

This patch (of 8):

None of these bits may be used for slab allocations, so we can use them
as radix tree flags as long as we mask them off before passing them to
the slab allocator. Move the IDR flag from the high bits to the
GFP_ZONEMASK bits.

Link: http://lkml.kernel.org/r/20180313132639.17387-3-willy@infradead.org
Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
Acked-by: Jeff Layton <jlayton@kernel.org>
Cc: Darrick J. Wong <darrick.wong@oracle.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2018-04-11 10:28:39 -07:00
Alexey Dobriyan
1f5bd05476 proc: selftests: test /proc/uptime 
The only tests I could come up with for /proc/uptime are:
 - test that values increase monotonically for 1 second,
 - bounce around CPUs and test the same thing.

Avoid glibc like plague for affinity given patches like this:
https://marc.info/?l=linux-kernel&m=152130031912594&w=4

Link: http://lkml.kernel.org/r/20180317165235.GB3445@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2018-04-11 10:28:34 -07:00
Alexey Dobriyan
05c3f29283 proc: selftests: shotgun testing of read/readdir/readlink/write 
Perform reads with nearly everything in /proc, and some writing as well.

Hopefully memleak checkers and KASAN will find something.

[adobriyan@gmail.com: /proc/kmsg can and will block if read under root]
  Link: http://lkml.kernel.org/r/20180316232147.GA20146@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
[adobriyan@gmail.com: /proc/sysrq-trigger lives on the ground floor]
  Link: http://lkml.kernel.org/r/20180317164911.GA3445@avx2
Link: http://lkml.kernel.org/r/20180315201251.GA12396@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2018-04-11 10:28:34 -07:00
Alexey Dobriyan
5de3d401b7 proc: add selftest for last field of /proc/loadavg 
Test fork counter formerly known as ->last_pid, the only part of
/proc/loadavg which can be tested.

Testing in init pid namespace is not reliable because of background
activity.

Link: http://lkml.kernel.org/r/20180311152241.GA26247@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2018-04-11 10:28:34 -07:00
Alexey Dobriyan
35318db566 proc: fix /proc/*/map_files lookup some more 
I totally forgot that _parse_integer() accepts arbitrary amount of
leading zeroes leading to the following lookups:

		OK
	# readlink /proc/1/map_files/56427ecba000-56427eddc000
	/lib/systemd/systemd

		bogus
	# readlink /proc/1/map_files/00000000000056427ecba000-56427eddc000
	/lib/systemd/systemd
	# readlink /proc/1/map_files/56427ecba000-00000000000056427eddc000
	/lib/systemd/systemd

Link: http://lkml.kernel.org/r/20180303215130.GA23480@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Reviewed-by: Cyrill Gorcunov <gorcunov@gmail.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Pavel Emelyanov <xemul@virtuozzo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2018-04-11 10:28:34 -07:00
Alexey Dobriyan
c4219edf1d proc: test /proc/self/syscall 
Read from /proc/self/syscall should yield read system call and correct
args in the output as current is reading /proc/self/syscall.

Link: http://lkml.kernel.org/r/20180226212145.GB742@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2018-04-11 10:28:34 -07:00
Alexey Dobriyan
9cd6565558 proc: test /proc/self/wchan 
This patch starts testing /proc.  Many more tests to come (I promise).

Read from /proc/self/wchan should always return "0" as current is in
TASK_RUNNING state while reading /proc/self/wchan.

Link: http://lkml.kernel.org/r/20180226212006.GA742@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2018-04-11 10:28:34 -07:00
Satoru Takeuchi
6cd110a91f ktest: Take submenu into account for grub2 menus 
grub-reboot selects the submenu's first menuentry (title is "1>0") rather than ktest's
menuentry (title is "2") by mistake.

===
$ sudo cat /boot/grub/grub.cfg  | grep -E "^menuentry|^submenu"
...
menuentry 'Ubuntu' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option '...' {
...
submenu 'Advanced options for Ubuntu' $menuentry_id_option '...' {
...
menuentry 'ktest' {
...
===

Correct it by taking submenu entries into account in get_grub2_index().

Link: http://lkml.kernel.org/r/87poaje4as.wl-satoru.takeuchi@gmail.com

Signed-off-by: Satoru Takeuchi <satoru.takeuchi@gmail.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
 2018-04-10 15:49:14 -04:00
Linus Torvalds
2a56bb596b New features: 
- Tom Zanussi's extended histogram work
    This adds the synthetic events to have histograms from multiple event data
    Adds triggers "onmatch" and "onmax" to call the synthetic events
    Several updates to the histogram code from this
 
  - Allow way to nest ring buffer calls in the same context
 
  - Allow absolute time stamps in ring buffer
 
  - Rewrite of filter code parsing based on Al Viro's suggestions
 
  - Setting of trace_clock to global if TSC is unstable (on boot)
 
  - Better OOM handling when allocating large ring buffers
 
  - Added initcall tracepoints (consolidated initcall_debug code with them)
 
 And other various fixes and clean ups
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Merge tag 'trace-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull tracing updates from Steven Rostedt:
 "New features:

   - Tom Zanussi's extended histogram work.

     This adds the synthetic events to have histograms from multiple
     event data Adds triggers "onmatch" and "onmax" to call the
     synthetic events Several updates to the histogram code from this

   - Allow way to nest ring buffer calls in the same context

   - Allow absolute time stamps in ring buffer

   - Rewrite of filter code parsing based on Al Viro's suggestions

   - Setting of trace_clock to global if TSC is unstable (on boot)

   - Better OOM handling when allocating large ring buffers

   - Added initcall tracepoints (consolidated initcall_debug code with
     them)

  And other various fixes and clean ups"

* tag 'trace-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (68 commits)
  init: Have initcall_debug still work without CONFIG_TRACEPOINTS
  init, tracing: Have printk come through the trace events for initcall_debug
  init, tracing: instrument security and console initcall trace events
  init, tracing: Add initcall trace events
  tracing: Add rcu dereference annotation for test func that touches filter->prog
  tracing: Add rcu dereference annotation for filter->prog
  tracing: Fixup logic inversion on setting trace_global_clock defaults
  tracing: Hide global trace clock from lockdep
  ring-buffer: Add set/clear_current_oom_origin() during allocations
  ring-buffer: Check if memory is available before allocation
  lockdep: Add print_irqtrace_events() to __warn
  vsprintf: Do not preprocess non-dereferenced pointers for bprintf (%px and %pK)
  tracing: Uninitialized variable in create_tracing_map_fields()
  tracing: Make sure variable string fields are NULL-terminated
  tracing: Add action comparisons when testing matching hist triggers
  tracing: Don't add flag strings when displaying variable references
  tracing: Fix display of hist trigger expressions containing timestamps
  ftrace: Drop a VLA in module_exists()
  tracing: Mention trace_clock=global when warning about unstable clocks
  tracing: Default to using trace_global_clock if sched_clock is unstable
  ...
 2018-04-10 11:27:30 -07:00
Linus Torvalds
9f3a0941fb libnvdimm for 4.17 
* A rework of the filesytem-dax implementation provides for detection of
   unmap operations (truncate / hole punch) colliding with in-progress
   device-DMA. A fix for these collisions remains a work-in-progress
   pending resolution of truncate latency and starvation regressions.
 
 * The of_pmem driver expands the users of libnvdimm outside of x86 and
   ACPI to describe an implementation of persistent memory on PowerPC with
   Open Firmware / Device tree.
 
 * Address Range Scrub (ARS) handling is completely rewritten to account for
   the fact that ARS may run for 100s of seconds and there is no platform
   defined way to cancel it. ARS will now no longer block namespace
   initialization.
 
 * The NVDIMM Namespace Label implementation is updated to handle label
   areas as small as 1K, down from 128K.
 
 * Miscellaneous cleanups and updates to unit test infrastructure.
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Merge tag 'libnvdimm-for-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm

Pull libnvdimm updates from Dan Williams:
 "This cycle was was not something I ever want to repeat as there were
  several late changes that have only now just settled.

  Half of the branch up to commit d2c997c0f1 ("fs, dax: use
  page->mapping to warn...") have been in -next for several releases.
  The of_pmem driver and the address range scrub rework were late
  arrivals, and the dax work was scaled back at the last moment.

  The of_pmem driver missed a previous merge window due to an oversight.
  A sense of obligation to rectify that miss is why it is included for
  4.17. It has acks from PowerPC folks. Stephen reported a build failure
  that only occurs when merging it with your latest tree, for now I have
  fixed that up by disabling modular builds of of_pmem. A test merge
  with your tree has received a build success report from the 0day robot
  over 156 configs.

  An initial version of the ARS rework was submitted before the merge
  window. It is self contained to libnvdimm, a net code reduction, and
  passing all unit tests.

  The filesystem-dax changes are based on the wait_var_event()
  functionality from tip/sched/core. However, late review feedback
  showed that those changes regressed truncate performance to a large
  degree. The branch was rewound to drop the truncate behavior change
  and now only includes preparation patches and cleanups (with full acks
  and reviews). The finalization of this dax-dma-vs-trnucate work will
  need to wait for 4.18.

  Summary:

   - A rework of the filesytem-dax implementation provides for detection
     of unmap operations (truncate / hole punch) colliding with
     in-progress device-DMA. A fix for these collisions remains a
     work-in-progress pending resolution of truncate latency and
     starvation regressions.

   - The of_pmem driver expands the users of libnvdimm outside of x86
     and ACPI to describe an implementation of persistent memory on
     PowerPC with Open Firmware / Device tree.

   - Address Range Scrub (ARS) handling is completely rewritten to
     account for the fact that ARS may run for 100s of seconds and there
     is no platform defined way to cancel it. ARS will now no longer
     block namespace initialization.

   - The NVDIMM Namespace Label implementation is updated to handle
     label areas as small as 1K, down from 128K.

   - Miscellaneous cleanups and updates to unit test infrastructure"

* tag 'libnvdimm-for-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: (39 commits)
  libnvdimm, of_pmem: workaround OF_NUMA=n build error
  nfit, address-range-scrub: add module option to skip initial ars
  nfit, address-range-scrub: rework and simplify ARS state machine
  nfit, address-range-scrub: determine one platform max_ars value
  powerpc/powernv: Create platform devs for nvdimm buses
  doc/devicetree: Persistent memory region bindings
  libnvdimm: Add device-tree based driver
  libnvdimm: Add of_node to region and bus descriptors
  libnvdimm, region: quiet region probe
  libnvdimm, namespace: use a safe lookup for dimm device name
  libnvdimm, dimm: fix dpa reservation vs uninitialized label area
  libnvdimm, testing: update the default smart ctrl_temperature
  libnvdimm, testing: Add emulation for smart injection commands
  nfit, address-range-scrub: introduce nfit_spa->ars_state
  libnvdimm: add an api to cast a 'struct nd_region' to its 'struct device'
  nfit, address-range-scrub: fix scrub in-progress reporting
  dax, dm: allow device-mapper to operate without dax support
  dax: introduce CONFIG_DAX_DRIVER
  fs, dax: use page->mapping to warn if truncate collides with a busy page
  ext2, dax: introduce ext2_dax_aops
  ...
 2018-04-10 10:25:57 -07:00
Rasmus Villemoes
9564a8cf42 Kbuild: fix # escaping in .cmd files for future Make 
I tried building using a freshly built Make (4.2.1-69-g8a731d1), but
already the objtool build broke with

orc_dump.c: In function ‘orc_dump’:
orc_dump.c:106:2: error: ‘elf_getshnum’ is deprecated [-Werror=deprecated-declarations]
  if (elf_getshdrnum(elf, &nr_sections)) {

Turns out that with that new Make, the backslash was not removed, so cpp
didn't see a #include directive, grep found nothing, and
-DLIBELF_USE_DEPRECATED was wrongly put in CFLAGS.

Now, that new Make behaviour is documented in their NEWS file:

  * WARNING: Backward-incompatibility!
    Number signs (#) appearing inside a macro reference or function invocation
    no longer introduce comments and should not be escaped with backslashes:
    thus a call such as:
      foo := $(shell echo '#')
    is legal.  Previously the number sign needed to be escaped, for example:
      foo := $(shell echo '\#')
    Now this latter will resolve to "\#".  If you want to write makefiles
    portable to both versions, assign the number sign to a variable:
      C := \#
      foo := $(shell echo '$C')
    This was claimed to be fixed in 3.81, but wasn't, for some reason.
    To detect this change search for 'nocomment' in the .FEATURES variable.

This also fixes up the two make-cmd instances to replace # with $(pound)
rather than with \#. There might very well be other places that need
similar fixup in preparation for whatever future Make release contains
the above change, but at least this builds an x86_64 defconfig with the
new make.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=197847
Cc: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
 2018-04-11 00:03:02 +09:00
Linus Torvalds
d8312a3f61 ARM: 
- VHE optimizations
 - EL2 address space randomization
 - speculative execution mitigations ("variant 3a", aka execution past invalid
 privilege register access)
 - bugfixes and cleanups
 
 PPC:
 - improvements for the radix page fault handler for HV KVM on POWER9
 
 s390:
 - more kvm stat counters
 - virtio gpu plumbing
 - documentation
 - facilities improvements
 
 x86:
 - support for VMware magic I/O port and pseudo-PMCs
 - AMD pause loop exiting
 - support for AMD core performance extensions
 - support for synchronous register access
 - expose nVMX capabilities to userspace
 - support for Hyper-V signaling via eventfd
 - use Enlightened VMCS when running on Hyper-V
 - allow userspace to disable MWAIT/HLT/PAUSE vmexits
 - usual roundup of optimizations and nested virtualization bugfixes
 
 Generic:
 - API selftest infrastructure (though the only tests are for x86 as of now)
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull kvm updates from Paolo Bonzini:
 "ARM:
   - VHE optimizations

   - EL2 address space randomization

   - speculative execution mitigations ("variant 3a", aka execution past
     invalid privilege register access)

   - bugfixes and cleanups

  PPC:
   - improvements for the radix page fault handler for HV KVM on POWER9

  s390:
   - more kvm stat counters

   - virtio gpu plumbing

   - documentation

   - facilities improvements

  x86:
   - support for VMware magic I/O port and pseudo-PMCs

   - AMD pause loop exiting

   - support for AMD core performance extensions

   - support for synchronous register access

   - expose nVMX capabilities to userspace

   - support for Hyper-V signaling via eventfd

   - use Enlightened VMCS when running on Hyper-V

   - allow userspace to disable MWAIT/HLT/PAUSE vmexits

   - usual roundup of optimizations and nested virtualization bugfixes

  Generic:
   - API selftest infrastructure (though the only tests are for x86 as
     of now)"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (174 commits)
  kvm: x86: fix a prototype warning
  kvm: selftests: add sync_regs_test
  kvm: selftests: add API testing infrastructure
  kvm: x86: fix a compile warning
  KVM: X86: Add Force Emulation Prefix for "emulate the next instruction"
  KVM: X86: Introduce handle_ud()
  KVM: vmx: unify adjacent #ifdefs
  x86: kvm: hide the unused 'cpu' variable
  KVM: VMX: remove bogus WARN_ON in handle_ept_misconfig
  Revert "KVM: X86: Fix SMRAM accessing even if VM is shutdown"
  kvm: Add emulation for movups/movupd
  KVM: VMX: raise internal error for exception during invalid protected mode state
  KVM: nVMX: Optimization: Dont set KVM_REQ_EVENT when VMExit with nested_run_pending
  KVM: nVMX: Require immediate-exit when event reinjected to L2 and L1 event pending
  KVM: x86: Fix misleading comments on handling pending exceptions
  KVM: x86: Rename interrupt.pending to interrupt.injected
  KVM: VMX: No need to clear pending NMI/interrupt on inject realmode interrupt
  x86/kvm: use Enlightened VMCS when running on Hyper-V
  x86/hyper-v: detect nested features
  x86/hyper-v: define struct hv_enlightened_vmcs and clean field bits
  ...
 2018-04-09 11:42:31 -07:00
Dan Williams
1ed41b5696 Merge branch 'for-4.17/libnvdimm' into libnvdimm-for-next 2018-04-09 10:50:08 -07:00
Sandipan Das
fcbd8fa446 perf tests clang: Fix function name for clang IR test 
As stated in tests/llvm-src-base.c, the name of the bpf function should
be "bpf_func__SyS_epoll_pwait" but this clang test fails as it tries to
lookup "bpf_func__SyS_epoll_wait".

Before applying patch:

55: builtin clang support                                 :
55.1: builtin clang compile C source to IR                : FAILED!
55.2: builtin clang compile C source to ELF object        : Skip

After applying patch:

55: builtin clang support                                 :
55.1: builtin clang compile C source to IR                : Ok
55.2: builtin clang compile C source to ELF object        : Ok

Signed-off-by: Sandipan Das <sandipan@linux.vnet.ibm.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Fixes: e67d52d411 ("perf clang: Update test case to use real BPF script")
Link: http://lkml.kernel.org/r/20180404180419.19056-3-sandipan@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2018-04-09 11:13:09 -03:00
Sandipan Das
7854e499f3 perf clang: Add support for recent clang versions 
The clang API calls used by perf have changed in recent releases and
builds succeed with libclang-3.9 only. This introduces compatibility
with libclang-4.0 and above.

Without this patch, we will see the following compilation errors with
libclang-4.0+:

 util/c++/clang.cpp: In function ‘clang::CompilerInvocation* perf::createCompilerInvocation(llvm::opt::ArgStringList, llvm::StringRef&, clang::DiagnosticsEngine&)’:
 util/c++/clang.cpp:62:33: error: ‘IK_C’ was not declared in this scope
   Opts.Inputs.emplace_back(Path, IK_C);
                                  ^~~~
 util/c++/clang.cpp: In function ‘std::unique_ptr<llvm::Module> perf::getModuleFromSource(llvm::opt::ArgStringList, llvm::StringRef, llvm::IntrusiveRefCntPtr<clang::vfs::FileSystem>)’:
 util/c++/clang.cpp:75:26: error: no matching function for call to ‘clang::CompilerInstance::setInvocation(clang::CompilerInvocation*)’
   Clang.setInvocation(&*CI);
                           ^
 In file included from util/c++/clang.cpp:14:0:
 /usr/include/clang/Frontend/CompilerInstance.h:231:8: note: candidate: void clang::CompilerInstance::setInvocation(std::shared_ptr<clang::CompilerInvocation>)
    void setInvocation(std::shared_ptr<CompilerInvocation> Value);
         ^~~~~~~~~~~~~

Committer testing:

Tested on Fedora 27 after installing the clang-devel and llvm-devel
packages, versions:

  # rpm -qa | egrep llvm\|clang
  llvm-5.0.1-6.fc27.x86_64
  clang-libs-5.0.1-5.fc27.x86_64
  clang-5.0.1-5.fc27.x86_64
  clang-tools-extra-5.0.1-5.fc27.x86_64
  llvm-libs-5.0.1-6.fc27.x86_64
  llvm-devel-5.0.1-6.fc27.x86_64
  clang-devel-5.0.1-5.fc27.x86_64
  #

Make sure you don't have some older version lying around in /usr/local,
etc, then:

  $ make LIBCLANGLLVM=1 -C tools/perf install-bin

And in the end perf will be linked agains these libraries:

  # ldd ~/bin/perf | egrep -i llvm\|clang
	libclangAST.so.5 => /lib64/libclangAST.so.5 (0x00007f8bb2eb4000)
	libclangBasic.so.5 => /lib64/libclangBasic.so.5 (0x00007f8bb29e3000)
	libclangCodeGen.so.5 => /lib64/libclangCodeGen.so.5 (0x00007f8bb23f7000)
	libclangDriver.so.5 => /lib64/libclangDriver.so.5 (0x00007f8bb2060000)
	libclangFrontend.so.5 => /lib64/libclangFrontend.so.5 (0x00007f8bb1d06000)
	libclangLex.so.5 => /lib64/libclangLex.so.5 (0x00007f8bb1a3e000)
	libclangTooling.so.5 => /lib64/libclangTooling.so.5 (0x00007f8bb17d4000)
	libclangEdit.so.5 => /lib64/libclangEdit.so.5 (0x00007f8bb15c5000)
	libclangSema.so.5 => /lib64/libclangSema.so.5 (0x00007f8bb0cc9000)
	libclangAnalysis.so.5 => /lib64/libclangAnalysis.so.5 (0x00007f8bb0a23000)
	libclangParse.so.5 => /lib64/libclangParse.so.5 (0x00007f8bb0725000)
	libclangSerialization.so.5 => /lib64/libclangSerialization.so.5 (0x00007f8bb039a000)
	libLLVM-5.0.so => /lib64/libLLVM-5.0.so (0x00007f8bace98000)
	libclangASTMatchers.so.5 => /lib64/../lib64/libclangASTMatchers.so.5 (0x00007f8bab735000)
	libclangFormat.so.5 => /lib64/../lib64/libclangFormat.so.5 (0x00007f8bab4b2000)
	libclangRewrite.so.5 => /lib64/../lib64/libclangRewrite.so.5 (0x00007f8bab2a1000)
	libclangToolingCore.so.5 => /lib64/../lib64/libclangToolingCore.so.5 (0x00007f8bab08e000)
  #

Signed-off-by: Sandipan Das <sandipan@linux.vnet.ibm.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Fixes: 00b86691c7 ("perf clang: Add builtin clang support ant test case")
Link: http://lkml.kernel.org/r/20180404180419.19056-2-sandipan@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 2018-04-09 11:13:08 -03:00