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linux/tools/perf
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Arnaldo Carvalho de Melo 4f4ba0e6af perf tests: No need to set attr.sample_freq in the perf time to TSC test 
We were asking for a 4kHz sample_freq, making the test fail needlessly
when the system reduced /proc/sys/kernel/perf_event_max_sample_rate
below that.

In this test we only look at the PERF_SAMPLE_TIME fields in PERF_RECORD_
meta events, no need to set sample_freq.

Thanks to Namhyung for suggesting that max_sample_rate could be the
reason for the test failure, seeing the 'perf test -vv' output I sent.

Before:

  # echo 1000 > /proc/sys/kernel/perf_event_max_sample_rate
  # perf test TSC
  45: Test converting perf time to TSC   : FAILED!

After:

  # perf test TSC
  45: Test converting perf time to TSC   : Ok
  # cat /proc/sys/kernel/perf_event_max_sample_rate
  1000

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-lcob05qhawkuvsyuu9g1fld5@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-01-07 11:26:54 -03:00
..
arch perf tests: No need to set attr.sample_freq in the perf time to TSC test 2016-01-07 11:26:54 -03:00
bench perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
config tools build feature: Move dwarf post unwind choice output into perf 2016-01-06 20:11:13 -03:00
Documentation perf report: Add documentation for dynamic sort keys 2016-01-06 20:11:14 -03:00
python perf python: Support the PERF_RECORD_SWITCH event 2015-10-07 19:41:50 -03:00
scripts perf script: Add stat-cpi.py script 2016-01-06 20:11:16 -03:00
tests perf tools: Pass evlist to setup_sorting() 2016-01-06 20:11:11 -03:00
trace/strace/groups perf trace: Add read/write to the file group 2015-09-04 13:22:06 -03:00
ui perf tools: Skip dynamic fields not defined for current event 2016-01-06 20:11:12 -03:00
util perf pmu: fix alias->snapshot missing initialization bug 2016-01-06 20:11:16 -03:00
.gitignore perf tools: Add Intel PT instruction decoder 2015-08-17 11:11:36 -03:00
Build perf tools: Provide subcmd configuration at runtime 2015-12-16 16:18:16 -03:00
builtin-annotate.c perf tools: Pass evlist to setup_sorting() 2016-01-06 20:11:11 -03:00
builtin-bench.c perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
builtin-buildid-cache.c perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
builtin-buildid-list.c perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
builtin-config.c perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
builtin-data.c perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
builtin-diff.c perf tools: Pass evlist to setup_sorting() 2016-01-06 20:11:11 -03:00
builtin-evlist.c perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
builtin-help.c perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
builtin-inject.c perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
builtin-kmem.c perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
builtin-kvm.c perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
builtin-list.c perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
builtin-lock.c perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
builtin-mem.c perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
builtin-probe.c perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
builtin-record.c perf tools: Introduce stat perf.data header feature 2015-12-17 15:15:14 -03:00
builtin-report.c perf report/top: Add --raw-trace option 2016-01-06 20:11:12 -03:00
builtin-sched.c perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
builtin-script.c perf script: Display stat events by default 2016-01-06 20:11:16 -03:00
builtin-stat.c perf stat record: Keep sample_type 0 for pipe session 2016-01-06 20:11:14 -03:00
builtin-timechart.c perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
builtin-top.c perf report/top: Add --raw-trace option 2016-01-06 20:11:12 -03:00
builtin-trace.c perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
builtin-version.c perf tools: Move cmd_version() to builtin-version.c 2015-12-09 13:42:03 -03:00
builtin.h perf tools: Add 'perf config' command 2015-11-23 18:31:24 -03:00
command-list.txt perf tools: Add 'perf config' command 2015-11-23 18:31:24 -03:00
CREDITS
design.txt perf tools: Update some code references in design.txt 2014-03-18 18:17:06 -03:00
Makefile perf tools: Allow shuffling the build tests 2015-11-05 11:39:54 -03:00
Makefile.perf perf build: Use FEATURE-DUMP in bpf subproject 2016-01-06 20:11:14 -03:00
MANIFEST perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
perf-archive.sh
perf-completion.sh perf tools: Avoid confusion with preloaded bash function for perf bash completion 2015-03-19 13:53:27 -03:00
perf-read-vdso.c perf tools: Build programs to copy 32-bit compatibility 2014-10-29 10:32:48 -02:00
perf-sys.h perf tools: Move generic barriers out of perf-sys.h 2015-05-08 16:05:08 -03:00
perf-with-kcore.sh perf tools: Fix perf-with-kcore handling of arguments containing spaces 2015-08-06 16:48:27 -03:00
perf.c perf subcmd: Create subcmd library 2015-12-17 14:27:14 -03:00
perf.h perf record: Add ability to name registers to record 2015-08-31 18:01:33 -03:00