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09d62154f6
linux/tools/perf/util
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Daniel Borkmann 09d62154f6 tools, perf: add and use optimized ring_buffer_{read_head, write_tail} helpers 
Currently, on x86-64, perf uses LFENCE and MFENCE (rmb() and mb(),
respectively) when processing events from the perf ring buffer which
is unnecessarily expensive as we can do more lightweight in particular
given this is critical fast-path in perf.

According to Peter rmb()/mb() were added back then via a94d342b9c
("tools/perf: Add required memory barriers") at a time where kernel
still supported chips that needed it, but nowadays support for these
has been ditched completely, therefore we can fix them up as well.

While for x86-64, replacing rmb() and mb() with smp_*() variants would
result in just a compiler barrier for the former and LOCK + ADD for
the latter (__sync_synchronize() uses slower MFENCE by the way), Peter
suggested we can use smp_{load_acquire,store_release}() instead for
architectures where its implementation doesn't resolve in slower smp_mb().
Thus, e.g. in x86-64 we would be able to avoid CPU barrier entirely due
to TSO. For architectures where the latter needs to use smp_mb() e.g.
on arm, we stick to cheaper smp_rmb() variant for fetching the head.

This work adds helpers ring_buffer_read_head() and ring_buffer_write_tail()
for tools infrastructure that either switches to smp_load_acquire() for
architectures where it is cheaper or uses READ_ONCE() + smp_rmb() barrier
for those where it's not in order to fetch the data_head from the perf
control page, and it uses smp_store_release() to write the data_tail.
Latter is smp_mb() + WRITE_ONCE() combination or a cheaper variant if
architecture allows for it. Those that rely on smp_rmb() and smp_mb() can
further improve performance in a follow up step by implementing the two
under tools/arch/*/include/asm/barrier.h such that they don't have to
fallback to rmb() and mb() in tools/include/asm/barrier.h.

Switch perf to use ring_buffer_read_head() and ring_buffer_write_tail()
so it can make use of the optimizations. Later, we convert libbpf as
well to use the same helpers.

Side note [0]: the topic has been raised of whether one could simply use
the C11 gcc builtins [1] for the smp_load_acquire() and smp_store_release()
instead:

  __atomic_load_n(ptr, __ATOMIC_ACQUIRE);
  __atomic_store_n(ptr, val, __ATOMIC_RELEASE);

Kernel and (presumably) tooling shipped along with the kernel has a
minimum requirement of being able to build with gcc-4.6 and the latter
does not have C11 builtins. While generally the C11 memory models don't
align with the kernel's, the C11 load-acquire and store-release alone
/could/ suffice, however. Issue is that this is implementation dependent
on how the load-acquire and store-release is done by the compiler and
the mapping of supported compilers must align to be compatible with the
kernel's implementation, and thus needs to be verified/tracked on a
case by case basis whether they match (unless an architecture uses them
also from kernel side). The implementations for smp_load_acquire() and
smp_store_release() in this patch have been adapted from the kernel side
ones to have a concrete and compatible mapping in place.

  [0] http://patchwork.ozlabs.org/patch/985422/
  [1] https://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-10-19 13:43:08 -07:00
..
c++ perf tools: Fix a clang 7.0 compilation error 2018-06-25 11:59:37 -03:00
cs-etm-decoder perf cs-etm: Fix start tracing packet handling 2018-07-31 10:57:56 -03:00
include License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
intel-pt-decoder perf intel-pt: Fix packet decoding of CYC packets 2018-06-25 11:59:36 -03:00
libunwind License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
scripting-engines tools lib traceevent, perf tools: Rename pevent_read_number_* APIs 2018-08-13 15:22:05 -03:00
annotate.c perf annotate: Fix parsing aarch64 branch instructions after objdump update 2018-08-30 15:51:54 -03:00
annotate.h perf annotate: Fix parsing aarch64 branch instructions after objdump update 2018-08-30 15:51:54 -03:00
arm-spe-pkt-decoder.c perf tools: Add ARM Statistical Profiling Extensions (SPE) support 2018-01-17 10:23:31 -03:00
arm-spe-pkt-decoder.h perf tools: Add ARM Statistical Profiling Extensions (SPE) support 2018-01-17 10:23:31 -03:00
arm-spe.c perf tools: Add ARM Statistical Profiling Extensions (SPE) support 2018-01-17 10:23:31 -03:00
arm-spe.h perf tools: Add ARM Statistical Profiling Extensions (SPE) support 2018-01-17 10:23:31 -03:00
auxtrace.c perf auxtrace: Fix queue resize 2018-08-14 19:00:53 -03:00
auxtrace.h perf auxtrace: Support for perf report -D for s390 2018-08-03 10:34:18 -03:00
block-range.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
block-range.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
bpf-loader.c perf bpf: Make bpf__setup_output_event() return the bpf-output event 2018-08-08 15:55:58 -03:00
bpf-loader.h perf bpf: Make bpf__setup_output_event() return the bpf-output event 2018-08-08 15:55:58 -03:00
bpf-prologue.c docs: Fix some broken references 2018-06-15 18:10:01 -03:00
bpf-prologue.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
branch.c perf util: Create branch.c/.h for common branch functions 2017-07-18 23:14:40 -03:00
branch.h perf report: Tag branch type/flag on "to" and tag cycles on "from" 2017-07-25 22:46:35 -03:00
Build perf auxtrace: Support for perf report -D for s390 2018-08-03 10:34:18 -03:00
build-id.c perf thread: Make thread__find_map() return the map 2018-04-26 13:47:08 -03:00
build-id.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
cache.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
call-path.c perf tools: Refactor code to move call path handling out of thread-stack 2016-05-06 13:00:43 -03:00
call-path.h perf tools: Refactor code to move call path handling out of thread-stack 2016-05-06 13:00:43 -03:00
callchain.c perf unwind: Do not look just at the global callchain_param.record_mode 2018-01-17 10:23:32 -03:00
callchain.h perf unwind: Do not look just at the global callchain_param.record_mode 2018-01-17 10:23:32 -03:00
cgroup.c perf cgroup: Make evlist__find_cgroup() more compact 2018-06-04 10:28:50 -03:00
cgroup.h perf cgroup: Make the cgroup name be const char * 2018-03-07 10:22:26 -03:00
cloexec.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
cloexec.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
color.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
color.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
comm.c perf tools: Fix struct comm_str removal crash 2018-07-24 14:54:03 -03:00
comm.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
compress.h perf tools: Add is_compressed callback to compressions array 2018-08-20 08:54:59 -03:00
config.c perf config: Call perf_config__init() lazily 2018-05-16 16:11:09 -03:00
config.h perf config: Call perf_config__init() lazily 2018-05-16 16:11:09 -03:00
counts.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
counts.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
cpumap.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
cpumap.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
cs-etm.c perf cs-etm: Generate branch sample for CS_ETM_TRACE_ON packet 2018-07-31 11:22:50 -03:00
cs-etm.h coresight: Move to SPDX identifier 2018-04-19 12:29:41 -03:00
ctype.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
data-convert-bt.c tools lib traceevent, perf tools: Rename pevent_read_number_* APIs 2018-08-13 15:22:05 -03:00
data-convert-bt.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
data-convert.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
data.c perf tools: Move conditional O_CLOEXEC to util.h 2018-01-23 09:48:20 -03:00
data.h Merge branch 'linus' into perf/core, to fix conflicts 2017-11-07 10:30:18 +01:00
db-export.c perf symbols: Unify symbol maps 2018-04-27 10:47:06 -03:00
db-export.h perf script: Add call path id to exported sample in db export 2016-05-06 13:00:53 -03:00
debug.c perf debug: Avoid setting 'quiet' to 'true' unnecessarily 2018-03-16 16:39:02 -03:00
debug.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
demangle-java.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
demangle-java.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
demangle-rust.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
demangle-rust.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
drv_configs.c perf tools: Include errno.h where needed 2017-04-19 13:01:51 -03:00
drv_configs.h perf pmu: Push configuration down to PMU driver 2016-09-22 12:19:41 -03:00
dso.c perf tools: Remove ext from struct kmod_path 2018-08-20 08:54:59 -03:00
dso.h perf tools: Remove ext from struct kmod_path 2018-08-20 08:54:59 -03:00
dump-insn.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dump-insn.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dwarf-aux.c perf config: Rename to HAVE_DWARF_GETLOCATIONS_SUPPORT 2018-04-02 13:50:24 -03:00
dwarf-aux.h perf probe: Match linkage name with mangled name 2016-09-29 11:17:08 -03:00
dwarf-regs.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
env.c perf machine: Add nr_cpus_avail() 2018-05-22 10:52:49 -03:00
env.h perf machine: Add nr_cpus_avail() 2018-05-22 10:52:49 -03:00
event.c perf map: Synthesize maps only for thread group leader 2018-08-08 15:55:59 -03:00
event.h perf machine: Synthesize and process mmap events for x86 PTI entry trampolines 2018-05-23 10:26:39 -03:00
evlist.c perf mmap: Store real cpu number in 'struct perf_mmap' 2018-08-20 08:54:59 -03:00
evlist.h perf evlist: Introduce force_leader() method 2018-05-21 14:40:54 -03:00
evsel_fprintf.c Merge branch 'linus' into perf/core, to fix conflicts 2017-11-07 10:30:18 +01:00
evsel.c perf evsel: Fix potential null pointer dereference in perf_evsel__new_idx() 2018-08-30 14:49:25 -03:00
evsel.h perf annotate: Loop group events directly in annotation__calc_percent() 2018-08-08 15:55:47 -03:00
expr.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
expr.y perf tools: Dedup events in expression parsing 2017-08-22 12:19:08 -03:00
find-vdso-map.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
genelf_debug.c tools: Adopt __packed from kernel sources 2017-06-19 15:27:07 -03:00
genelf.c perf tools: Fix spelling mistake: "builid" -> "buildid" 2018-04-30 12:02:03 -03:00
genelf.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
generate-cmdlist.sh perf tools: Rename HAVE_SYSCALL_TABLE to HAVE_SYSCALL_TABLE_SUPPORT 2018-04-12 10:33:31 -03:00
group.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
header.c tools lib traceevent, perf tools: Rename pevent find APIs 2018-08-13 15:21:51 -03:00
header.h perf tools: Fix the build on the alpine:edge distro 2018-07-30 13:15:03 -03:00
help-unknown-cmd.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
help-unknown-cmd.h perf tools: Move help_unknown_cmd() to its own file 2015-12-14 12:30:37 -03:00
hist.c perf hists: Reimplement hists__has_callchains() 2018-06-07 14:42:27 -03:00
hist.h perf hists: Clarify callchain disabling when available 2018-07-24 14:37:33 -03:00
intel-bts.c perf thread: Make thread__find_map() return the map 2018-04-26 13:47:08 -03:00
intel-bts.h
intel-pt.c perf intel-pt: Fix "Unexpected indirect branch" error 2018-06-06 12:52:08 -03:00
intel-pt.h perf intel-pt: Record address filter in AUXTRACE_INFO event 2016-09-29 11:17:05 -03:00
intlist.c
intlist.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
jit.h Merge branch 'linus' into perf/core, to fix conflicts 2017-11-07 10:30:18 +01:00
jitdump.c Merge branch 'linus' into perf/core, to fix conflicts 2017-11-07 10:30:18 +01:00
jitdump.h perf jit: Add unwinding support 2016-10-24 11:07:39 -03:00
kvm-stat.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
levenshtein.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
levenshtein.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
llvm-utils.c perf llvm: Allow passing options to llc in addition to clang 2018-08-20 08:54:58 -03:00
llvm-utils.h perf llvm: Allow passing options to llc in addition to clang 2018-08-20 08:54:58 -03:00
lzma.c perf tools: Add lzma_is_compressed function 2018-08-20 08:54:59 -03:00
machine.c perf record: Use unmapped IP for inline callchain cursors 2018-10-05 11:18:09 -03:00
machine.h tools lib traceevent, perf tools: Rename pevent_set_* APIs 2018-08-13 15:22:10 -03:00
map.c perf tools: Fix maps__find_symbol_by_name() 2018-09-11 14:12:51 -03:00
map.h perf map: Optimize maps__fixup_overlappings() 2018-08-08 15:56:00 -03:00
mem2node.c perf tools: Add mem2node object 2018-03-16 13:52:37 -03:00
mem2node.h perf tools: Add mem2node object 2018-03-16 13:52:37 -03:00
mem-events.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mem-events.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
memswap.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
memswap.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
metricgroup.c perf list: Unify metric group description format with PMU event description 2018-07-31 11:35:44 -03:00
metricgroup.h perf stat: Add transaction flag (-T) support for s390 2018-07-24 14:49:37 -03:00
mmap.c perf mmap: Store real cpu number in 'struct perf_mmap' 2018-08-20 08:54:59 -03:00
mmap.h tools, perf: add and use optimized ring_buffer_{read_head, write_tail} helpers 2018-10-19 13:43:08 -07:00
namespaces.c perf tools: Check for null when copying nsinfo. 2018-08-13 15:39:09 -03:00
namespaces.h perf tools: Fix the build on the alpine:edge distro 2018-07-30 13:15:03 -03:00
ordered-events.c perf ordered_events: Pass timestamp arg in perf_session__queue_event 2017-11-17 12:14:09 -03:00
ordered-events.h perf ordered_events: Pass timestamp arg in perf_session__queue_event 2017-11-17 12:14:09 -03:00
parse-branch-options.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
parse-branch-options.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
parse-events.c perf parser: Improve error message for PMU address filters 2018-08-20 08:54:58 -03:00
parse-events.h perf parse-events: Handle uncore event aliases in small groups properly 2018-05-30 10:40:44 -03:00
parse-events.l perf record: Enable arbitrary event names thru name= modifier 2018-06-06 12:52:04 -03:00
parse-events.y perf tools: Fix error index for pmu event parser 2018-06-07 15:50:14 -03:00
parse-regs-options.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
parse-regs-options.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
path.c perf utils: Move is_directory() to path.h 2017-12-27 12:15:48 -03:00
path.h perf utils: Move is_directory() to path.h 2017-12-27 12:15:48 -03:00
perf_regs.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
perf_regs.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
perf-hooks-list.h perf tools: Introduce perf hooks 2016-11-29 12:13:27 -03:00
perf-hooks.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
perf-hooks.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
PERF-VERSION-GEN License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pmu.c Revert "perf list: Add s390 support for detailed/verbose PMU event description" 2018-07-24 14:48:58 -03:00
pmu.h perf pmu: Pass pmu as a parameter to get_cpuid_str() 2017-12-05 10:24:33 -03:00
pmu.l
pmu.y
print_binary.c Merge branch 'linus' into perf/core, to fix conflicts 2017-11-07 10:30:18 +01:00
print_binary.h Merge branch 'linus' into perf/core, to fix conflicts 2017-11-07 10:30:18 +01:00
probe-event.c perf probe: Use return of map__get() to make code more compact 2018-06-04 10:28:50 -03:00
probe-event.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
probe-file.c tools lib api: Unexport 'tracing_path' variable 2018-05-16 16:27:14 -03:00
probe-file.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
probe-finder.c perf probe: Use right type to access array elements 2018-03-19 13:51:53 -03:00
probe-finder.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pstack.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pstack.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
python-ext-sources perf evsel: Fix swap for samples with raw data 2017-12-27 12:15:56 -03:00
python.c perf python: Fix pyrf_evlist__read_on_cpu() interface 2018-08-20 08:54:59 -03:00
rb_resort.h Merge branch 'linus' into perf/core, to fix conflicts 2017-11-07 10:30:18 +01:00
rblist.c perf rblist: Create rblist__exit() function 2017-12-05 10:24:31 -03:00
rblist.h perf rblist: Create rblist__exit() function 2017-12-05 10:24:31 -03:00
record.c perf record: Fix crash in pipe mode 2018-03-05 11:52:41 -03:00
rwsem.c perf tools: Provide mutex wrappers for pthreads rwlocks 2017-09-21 13:28:06 -03:00
rwsem.h perf tools: Provide mutex wrappers for pthreads rwlocks 2017-09-21 13:28:06 -03:00
s390-cpumsf-kernel.h perf report: Add raw report support for s390 auxiliary trace 2018-08-08 15:26:48 -03:00
s390-cpumsf.c perf report: Add GUI report support for s390 auxiliary trace 2018-08-08 15:49:17 -03:00
s390-cpumsf.h perf auxtrace: Support for perf report -D for s390 2018-08-03 10:34:18 -03:00
sane_ctype.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
session.c perf evsel: Add has_callchain() helper to make code more compact/clear 2018-06-05 10:09:54 -03:00
session.h perf/core improvements and fixes: 2017-11-18 08:59:27 +01:00
setns.c tools build: Add test for setns() 2017-07-18 23:14:08 -03:00
setup.py perf python: Use -Wno-redundant-decls to build with PYTHON=python3 2018-10-05 11:11:55 -03:00
smt.c perf tools: Add utility function to detect SMT status 2017-08-22 12:09:04 -03:00
smt.h perf tools: Add utility function to detect SMT status 2017-08-22 12:09:04 -03:00
sort.c tools lib traceevent, perf tools: Rename pevent_read_number_* APIs 2018-08-13 15:22:05 -03:00
sort.h tools lib traceevent, perf tools: Rename struct pevent to struct tep_handle 2018-08-10 15:29:35 -03:00
srcline.c perf symbols: Store the ELF symbol type in the symbol struct 2018-04-26 13:47:18 -03:00
srcline.h perf report: Fix a wrong offset issue when using /proc/kcore 2018-01-08 11:11:57 -03:00
stat-shadow.c perf stat: Get rid of extra clock display function 2018-07-24 14:54:58 -03:00
stat.c perf stat: Make function perf_stat_evsel_id_init static 2018-03-16 13:56:17 -03:00
stat.h perf stat: Add --table option to display time of each run 2018-04-26 09:30:27 -03:00
strbuf.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
strbuf.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
strfilter.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
strfilter.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
string2.h perf string: Add {strdup,strpbrk}_esc() 2017-12-27 12:15:55 -03:00
string.c perf string: Add {strdup,strpbrk}_esc() 2017-12-27 12:15:55 -03:00
strlist.c perf tools: Remove string.h, unistd.h and sys/stat.h from util.h 2017-04-24 13:43:33 -03:00
strlist.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
svghelper.c perf timechart: Use NSEC_PER_U?SEC 2016-08-23 15:37:33 -03:00
svghelper.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
symbol_fprintf.c perf symbols: Unify symbol maps 2018-04-27 10:47:06 -03:00
symbol-elf.c perf kcore_copy: Amend the offset of sections that remap kernel text 2018-05-23 10:26:44 -03:00
symbol-minimal.c perf symbols: Unify symbol maps 2018-04-27 10:47:06 -03:00
symbol.c perf symbols: Add BSS symbols when reading from /proc/kallsyms 2018-06-06 12:52:09 -03:00
symbol.h perf annotate: Adopt anotation options from symbol_conf 2018-06-04 10:28:53 -03:00
syscalltbl.c perf trace arm64: Use generated syscall table 2018-07-24 14:53:01 -03:00
syscalltbl.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
target.c perf target: str_error_r() always returns the buffer it receives 2016-07-29 11:54:35 -03:00
target.h perf stat: Remove --per-thread pid/tid limitation 2017-12-27 12:15:47 -03:00
term.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
term.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
thread_map.c perf stat: Ignore error thread when enabling system-wide --per-thread 2018-02-27 11:29:21 -03:00
thread_map.h perf stat: Ignore error thread when enabling system-wide --per-thread 2018-02-27 11:29:21 -03:00
thread-stack.c perf tools: Include errno.h where needed 2017-04-19 13:01:51 -03:00
thread-stack.h perf script: Add callindent option 2016-06-23 17:04:26 -03:00
thread.c perf symbols: Unify symbol maps 2018-04-27 10:47:06 -03:00
thread.h perf thread: Make thread__find_map() search all maps 2018-04-26 13:47:17 -03:00
time-utils.c perf util: Allocate time slices buffer according to number of comma 2018-01-17 10:23:36 -03:00
time-utils.h perf util: Allocate time slices buffer according to number of comma 2018-01-17 10:23:36 -03:00
tool.h perf tools: Make the tool's warning messages optional 2018-01-10 12:00:55 -03:00
top.c
top.h perf annotate stdio: Use annotation_options consistently 2018-06-04 10:28:52 -03:00
trace-event-info.c perf util: Fix bad memory access in trace info. 2018-08-30 14:50:50 -03:00
trace-event-parse.c perf event-parse: Use fixed size string for comms 2018-08-30 14:51:45 -03:00
trace-event-read.c tools lib traceevent, perf tools: Rename 'enum pevent_flag' to 'enum tep_flag' 2018-08-13 15:22:18 -03:00
trace-event-scripting.c tools lib traceevent, perf tools: Rename struct pevent to struct tep_handle 2018-08-10 15:29:35 -03:00
trace-event.c tools lib traceevent, perf tools: Rename 'enum pevent_flag' to 'enum tep_flag' 2018-08-13 15:22:18 -03:00
trace-event.h tools lib traceevent, perf tools: Rename pevent alloc / free APIs 2018-08-13 15:21:43 -03:00
trigger.h perf tools: Fix trigger class trigger_on() 2018-03-06 11:31:14 -03:00
tsc.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tsc.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
units.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
units.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
unwind-libdw.c perf script: Show correct offsets for DWARF-based unwinding 2018-07-24 14:53:11 -03:00
unwind-libdw.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
unwind-libunwind-local.c perf script: Show correct offsets for DWARF-based unwinding 2018-07-24 14:53:11 -03:00
unwind-libunwind.c perf env: Adopt perf_env__arch() from the annotate code 2017-12-27 12:15:52 -03:00
unwind.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
usage.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
util-cxx.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
util.c perf tools: No need to unconditionally read the max_stack sysctls 2018-05-17 16:31:32 -03:00
util.h perf tools: No need to unconditionally read the max_stack sysctls 2018-05-17 16:31:32 -03:00
values.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
values.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
vdso.c perf map: Remove enum_type arg to map_groups__first() 2018-04-26 13:47:15 -03:00
vdso.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
xyarray.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
xyarray.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
zlib.c perf tools: Add gzip_is_compressed function 2018-08-20 08:54:59 -03:00