[PATCH 37/59] perf tests: No need to set attr.sample_freq for tracking !PERF_RECORD_SAMPLE

From	Arnaldo Carvalho de Melo <acme@kernel.org>
Newsgroups	linux.kernel
Subject	[PATCH 37/59] perf tests: No need to set attr.sample_freq for tracking !PERF_RECORD_SAMPLE
Date	2016-01-08 19:20 +0100
Message-ID	<qOJNO-25i-55@gated-at.bofh.it> (permalink)
References	<qOJE5-21e-1@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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From: Arnaldo Carvalho de Melo <acme@redhat.com>

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.

Before:

  # perf test -vv dummy
  23: Test using a dummy software event to keep tracking       :
  --- start ---
  test child forked, pid 32421
  ------------------------------------------------------------
  perf_event_attr:
    type                             1
    size                             112
    config                           0x9
    { sample_period, sample_freq }   4000
    sample_type                      IP|TID|ID|PERIOD
  <SNIP>
  sys_perf_event_open failed, error -22
  Unable to open dummy and cycles event
  test child finished with -2
  ---- end ----
  Test using a dummy software event to keep tracking: Skip
  #
  [root@zoo ~]# cat /proc/sys/kernel/perf_event_max_sample_rate
  1000

After:

  [root@zoo ~]# perf test dummy
  23: Test using a dummy software event to keep tracking       : Ok

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: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-487iquegrs2379e5n0pi0tcp@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/tests/keep-tracking.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/tools/perf/tests/keep-tracking.c b/tools/perf/tests/keep-tracking.c
index a337a6da1f39..615813278334 100644
--- a/tools/perf/tests/keep-tracking.c
+++ b/tools/perf/tests/keep-tracking.c
@@ -55,7 +55,6 @@ int test__keep_tracking(int subtest __maybe_unused)
 		.mmap_pages	     = UINT_MAX,
 		.user_freq	     = UINT_MAX,
 		.user_interval	     = ULLONG_MAX,
-		.freq		     = 4000,
 		.target		     = {
 			.uses_mmap   = true,
 		},
-- 
2.1.0

Thread

[GIT PULL 00/59] perf/core improvements and fixes Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:10 +0100
  [PATCH 24/59] perf script: Process stat config event Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:10 +0100
  [PATCH 40/59] tools lib: Sync tools/lib/find_bit.c with the kernel Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:10 +0100
  [PATCH 49/59] perf tools: Add overhead/overhead_children keys defaults via string Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:10 +0100
  [PATCH 39/59] tools lib: Move find_next_bit.c to tools/lib/ Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:10 +0100
  [PATCH 42/59] perf top: Decay periods in callchains Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:10 +0100
  [PATCH 15/59] tools build feature: Fix feature_check_display_code typo Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:10 +0100
  [PATCH 23/59] perf script: Process cpu/threads maps Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:10 +0100
  [PATCH 43/59] perf report: Change default to use event group view Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:10 +0100
  [PATCH 05/59] perf tools: Pass evlist to setup_sorting() Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:10 +0100
  [PATCH 10/59] perf tools: Support shortcuts for events in dynamic sort keys Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:10 +0100
  [PATCH 13/59] perf tools: Add 'trace_fields' dynamic sort key Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:10 +0100
  [PATCH 59/59] perf evlist: Add --trace-fields option to show trace fields Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:10 +0100
  [PATCH 52/59] perf report: Show random usage tip on the help line Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:10 +0100
  [PATCH 48/59] perf tools: Remove list entry from struct sort_entry Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:10 +0100
  [PATCH 14/59] perf tools: Make 'trace' or 'trace_fields' sort key default for tracepoint events Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:10 +0100
  [PATCH 25/59] perf script: Add process_stat/process_stat_interval scripting interface Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:10 +0100
  [PATCH 41/59] tools lib: Move bitmap.[ch] from tools/perf/ to tools/{lib,include}/ Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:10 +0100
  [PATCH 02/59] perf hist: Save raw_data/size for tracepoint events Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:10 +0100
  [PATCH 08/59] perf tools: Add 'trace' sort key Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:10 +0100
  [PATCH 09/59] perf report/top: Add --raw-trace option Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:10 +0100
  [PATCH 45/59] perf tools: Add missing headers in perf's MANIFEST Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:10 +0100
  [PATCH 57/59] perf libdw: Check for mmaps also in MAP__VARIABLE tree Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:20 +0100
  [PATCH 56/59] perf unwind: Check for mmaps also in MAP__VARIABLE tree Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:20 +0100
  [PATCH 53/59] perf evlist: Make perf_evlist__open() open evsels with their cpus and threads (like perf record does) Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:20 +0100
  [PATCH 58/59] perf record: Store data mmaps for dwarf unwind Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:20 +0100
  [PATCH 47/59] perf tools: Include all tools/lib directory for tags/cscope/TAGS targets Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:20 +0100
  [PATCH 54/59] perf evlist: Remove perf_evlist__(enable|disable)_event functions Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:20 +0100
  [PATCH 51/59] perf hists: Export a couple of hist functions Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:20 +0100
  [PATCH 12/59] perf tools: Skip dynamic fields not defined for current event Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:20 +0100
  [PATCH 03/59] tools lib traceevent: Factor out and export print_event_field[s]() Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:20 +0100
  [PATCH 38/59] perf tests: Give a bit more information on the CQM test failure path Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:20 +0100
  [PATCH 37/59] perf tests: No need to set attr.sample_freq for tracking !PERF_RECORD_SAMPLE Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:20 +0100
  [PATCH 11/59] perf tools: Support '<event>.*' dynamic sort key Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:20 +0100
  [PATCH 04/59] perf top: Create the evlist sooner Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:20 +0100
  [PATCH 46/59] perf script: Align event name properly Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:20 +0100
  [PATCH 50/59] perf diff: Use perf_hpp__register_sort_field interface Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:20 +0100
  [PATCH 18/59] tools build feature: Use value assignment form for FEATURE-DUMP file Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:20 +0100
  [PATCH 35/59] perf test: No need for setting attr.sample_freq on the RECORD test Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:20 +0100
  [PATCH 33/59] perf evlist: Introduce perf_evlist__new_dummy constructor Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:20 +0100
  [PATCH 36/59] perf python: Add missing files to binding link list Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:20 +0100
  [PATCH 55/59] perf unwind: Use find_map function in access_dso_mem Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:20 +0100
  [PATCH 19/59] perf build: Use FEATURE-DUMP in bpf subproject Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:30 +0100
  [PATCH 28/59] perf cpumap: Fix cpu conversion in cpu_map__from_entries Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:30 +0100
  [PATCH 29/59] perf script: Display stat events by default Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:30 +0100
  [PATCH 07/59] perf tools: Try to show pretty printed output for dynamic sort keys Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:30 +0100
  [PATCH 16/59] tools build feature: Move dwarf post unwind choice output into perf Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:30 +0100
  [PATCH 20/59] perf tools: Add all matching dynamic sort keys for field name Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:30 +0100
  [PATCH 26/59] perf script: Add stat default handlers Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:30 +0100
  [PATCH 44/59] perf tools: Do not show trace command if it's not compiled in Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:30 +0100
  [PATCH 27/59] perf script: Add python support for stat events Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:30 +0100
  [PATCH 21/59] perf report: Add documentation for dynamic sort keys Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:30 +0100
  [PATCH 30/59] perf script: Add stat-cpi.py script Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:30 +0100
  [PATCH 34/59] perf test: Use "dummy" events in the PERF_RECORD_ test Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:30 +0100
  [PATCH 17/59] tools build feature: Introduce feature_assign macro Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:30 +0100
  [PATCH 31/59] perf pmu: fix alias->snapshot missing initialization bug Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:30 +0100
  [PATCH 32/59] perf tests: No need to set attr.sample_freq in the perf time to TSC test Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:30 +0100
  [PATCH 01/59] perf hist: Pass struct sample to __hists__add_entry() Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:30 +0100
  [PATCH 06/59] perf tools: Add dynamic sort key for tracepoint events Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:30 +0100
  [PATCH 22/59] perf stat record: Keep sample_type 0 for pipe session Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-08 19:30 +0100
  Re: [GIT PULL 00/59] perf/core improvements and fixes Ingo Molnar <mingo@kernel.org> - 2016-01-09 17:30 +0100

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