linux/tools/perf/tests
Arnaldo Carvalho de Melo 5243ba76a5 perf test: Reduce the sample_freq for the 'object code reading' test
Using 4 kHz is not necessary and sometimes is more than what was
auto-tuned:

  # dmesg | grep max_sample_rate | tail -2
  [ 2499.144373] perf interrupt took too long (2501 > 2500), lowering kernel.perf_event_max_sample_rate to 50000
  [ 3592.413606] perf interrupt took too long (5069 > 5000), lowering kernel.perf_event_max_sample_rate to 25000

Simulating a auto-tune of 2000 we make the test fail, as reported
by Steven Noonan for one of his machines, so reduce it to 500 HZ,
it is enough to get a good number of samples for this test:

  # perf test -v 21 2>&1  | grep '^Reading object code for memory address' | tee /tmp/out | tail -5
  Reading object code for memory address: 0x479f40
  Reading object code for memory address: 0x7f29b7eea80d
  Reading object code for memory address: 0x7f29b7eea80d
  Reading object code for memory address: 0x7f29b7eea800
  Reading object code for memory address: 0xffffffff813b2f23
  [root@jouet ~]# wc -l /tmp/out
  40 /tmp/out
  [root@jouet ~]#

For systems that auto-tune below that, the previous patches will tell the
user what is happening so that he may either ignore the result of this test or
bump /proc/sys/kernel/perf_event_max_sample_rate.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Steven Noonan <steven@uplinklabs.net>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-6kufyy1iprdfzrbtuqgxir70@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-02-19 19:12:44 -03:00
..
attr perf tests: Fix attr tests 2015-04-08 10:49:53 -03:00
.gitignore perf test: Add libbpf relocation checker 2016-01-26 12:10:55 -03:00
attr.c perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
attr.py perf tools: Remove EOL whitespaces 2015-01-21 13:24:31 -03:00
bp_signal_overflow.c perf tests: Pass the subtest index to each test routine 2015-11-19 13:19:15 -03:00
bp_signal.c perf tests: Fix build on older systems where 'signal' is reserved 2016-02-15 17:33:26 -03:00
bpf-script-example.c perf test: Enhance the LLVM test: update basic BPF test program 2015-11-06 17:49:24 -03:00
bpf-script-test-kbuild.c perf test: Enhance the LLVM tests: add kbuild test 2015-11-06 17:49:50 -03:00
bpf-script-test-prologue.c perf test: Test the BPF prologue adding infrastructure 2015-11-18 17:51:04 -03:00
bpf-script-test-relocation.c perf test: Add libbpf relocation checker 2016-01-26 12:10:55 -03:00
bpf.c perf test: Check environment before start real BPF test 2016-01-29 17:25:43 -03:00
Build perf test: Add libbpf relocation checker 2016-01-26 12:10:55 -03:00
builtin-test.c perf tools: Add event_update event unit type 2015-12-17 15:11:10 -03:00
code-reading.c perf test: Reduce the sample_freq for the 'object code reading' test 2016-02-19 19:12:44 -03:00
cpumap.c perf cpu_map: Add cpu_map__new_event function 2015-12-17 14:38:18 -03:00
dso-data.c perf tests: Pass the subtest index to each test routine 2015-11-19 13:19:15 -03:00
dwarf-unwind.c perf test: Use machine__new_host in dwarf unwind test 2015-12-07 18:12:54 -03:00
event_update.c perf tools: Add event_update event cpus type 2015-12-17 15:13:38 -03:00
evsel-roundtrip-name.c perf test: Prevent using bpf-output event in round trip name test 2015-12-07 18:12:56 -03:00
evsel-tp-sched.c perf tests: Pass the subtest index to each test routine 2015-11-19 13:19:15 -03:00
fdarray.c perf tests: Pass the subtest index to each test routine 2015-11-19 13:19:15 -03:00
hists_common.c perf test: Fix false TEST_OK result for 'perf test hist' 2016-01-11 19:22:22 -03:00
hists_common.h perf tests: Define and use symbolic names for fake symbols 2014-06-01 14:35:11 +02:00
hists_cumulate.c perf hists: Introduce perf_evsel__output_resort function 2016-02-03 11:13:11 -03:00
hists_filter.c perf hists: Introduce perf_evsel__output_resort function 2016-02-03 11:13:11 -03:00
hists_link.c perf test: Reset err after using it hold errcode in hist testcases 2016-01-11 19:22:22 -03:00
hists_output.c perf hists: Introduce perf_evsel__output_resort function 2016-02-03 11:13:11 -03:00
keep-tracking.c perf evlist: Remove perf_evlist__(enable|disable)_event functions 2016-01-08 14:15:43 -03:00
kmod-path.c perf tests: Pass the subtest index to each test routine 2015-11-19 13:19:15 -03:00
llvm.c perf test: Add libbpf relocation checker 2016-01-26 12:10:55 -03:00
llvm.h perf test: Add libbpf relocation checker 2016-01-26 12:10:55 -03:00
make perf build: Add libcrypto feature detection 2016-02-05 09:46:45 -03:00
mmap-basic.c perf tests: Pass the subtest index to each test routine 2015-11-19 13:19:15 -03:00
mmap-thread-lookup.c perf test: Use machine__new_host in mmap thread lookup test 2015-12-07 18:12:54 -03:00
openat-syscall-all-cpus.c perf tests: Pass the subtest index to each test routine 2015-11-19 13:19:15 -03:00
openat-syscall-tp-fields.c perf tests: Pass the subtest index to each test routine 2015-11-19 13:19:15 -03:00
openat-syscall.c perf tests: Pass the subtest index to each test routine 2015-11-19 13:19:15 -03:00
parse-events.c perf tools: Use perf_event_terms__purge() for non-malloced terms 2016-02-12 16:53:22 -03:00
parse-no-sample-id-all.c perf tests: Pass the subtest index to each test routine 2015-11-19 13:19:15 -03:00
perf-record.c perf test: No need for setting attr.sample_freq on the RECORD test 2016-01-07 13:20:22 -03:00
perf-targz-src-pkg perf tools: Add test for building detached source tarballs 2014-01-13 10:06:26 -03:00
pmu.c perf tests: Pass the subtest index to each test routine 2015-11-19 13:19:15 -03:00
python-use.c perf tests: Pass the subtest index to each test routine 2015-11-19 13:19:15 -03:00
sample-parsing.c perf tests: Pass the subtest index to each test routine 2015-11-19 13:19:15 -03:00
stat.c perf tools: Add stat round event synthesize function 2015-12-17 14:55:44 -03:00
sw-clock.c perf tests: Pass the subtest index to each test routine 2015-11-19 13:19:15 -03:00
switch-tracking.c perf evlist: Remove perf_evlist__(enable|disable)_event functions 2016-01-08 14:15:43 -03:00
task-exit.c perf tests: Pass the subtest index to each test routine 2015-11-19 13:19:15 -03:00
tests.h perf tools: Add event_update event unit type 2015-12-17 15:11:10 -03:00
thread-map.c perf thread_map: Add thread_map__new_event function 2015-12-17 14:38:16 -03:00
thread-mg-share.c perf tests: Pass the subtest index to each test routine 2015-11-19 13:19:15 -03:00
topology.c perf tests: Pass the subtest index to each test routine 2015-11-19 13:19:15 -03:00
vmlinux-kallsyms.c perf test: Fixup aliases checking in the 'vmlinux matches kallsyms' test 2016-01-26 11:52:52 -03:00