linux/tools/perf/tests/attr
Jiri Olsa 774cb499ca perf tools: Fix 'disabled' attribute config for record command
Currently the record command sets all events initially as disabled.

There's non conditional perf_evlist__enable call, that enables all
events before we exec tracee program. That actually screws whole
enable_on_exec logic, because the event is enabled before the traced
program got executed.

What we actually want is:

1) For any type of traced program:
  - all independent events and group leaders are disabled
  - all group members are enabled

   Group members are ruled by group leaders. They need to
   be enabled, because the group scheduling relies on that.

2) For traced programs executed by perf:
   - all independent events and group leaders have
     enable_on_exec set
   - we don't specifically enable or disable any event during
     the record command

   Independent events and group leaders are initially disabled
   and get enabled by exec. Group members are ruled by group
   leaders as stated in 1).

3) For traced programs attached by perf (pid/tid):
   - we specifically enable or disable all events during
     the record command

   When attaching events to already running traced we
   enable/disable events specifically, as there's no
   initial traced exec call.

Fixing appropriate perf_event_attr test case to cover this change.

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1352741644-16809-3-git-send-email-jolsa@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2012-11-14 16:52:03 -03:00
..
base-record perf tests: Removing 'optional' field 2012-11-05 14:03:59 -03:00
base-stat perf tests: Removing 'optional' field 2012-11-05 14:03:59 -03:00
README perf tests: Add documentation for attr tests 2012-11-05 14:03:58 -03:00
test-record-basic
test-record-branch-any perf tests: Add attr record branch any test 2012-11-05 14:02:18 -03:00
test-record-branch-filter-any perf tests: Add attr record branch filter tests 2012-11-05 14:02:21 -03:00
test-record-branch-filter-any_call perf tests: Add attr record branch filter tests 2012-11-05 14:02:21 -03:00
test-record-branch-filter-any_ret perf tests: Add attr record branch filter tests 2012-11-05 14:02:21 -03:00
test-record-branch-filter-hv perf tests: Add attr record branch filter tests 2012-11-05 14:02:21 -03:00
test-record-branch-filter-ind_call perf tests: Add attr record branch filter tests 2012-11-05 14:02:21 -03:00
test-record-branch-filter-k perf tests: Add attr record branch filter tests 2012-11-05 14:02:21 -03:00
test-record-branch-filter-u perf tests: Add attr record branch filter tests 2012-11-05 14:02:21 -03:00
test-record-count perf tests: Add attr record count test 2012-11-01 17:07:48 -03:00
test-record-data perf tests: Add attr record data test 2012-11-05 14:02:02 -03:00
test-record-freq perf tests: Add attr record freq test 2012-11-01 17:07:12 -03:00
test-record-graph-default perf tests: Add attr record graph test 2012-11-01 17:07:56 -03:00
test-record-graph-dwarf perf tests: Add attr record graph test 2012-11-01 17:07:56 -03:00
test-record-graph-fp perf tests: Add attr record graph test 2012-11-01 17:07:56 -03:00
test-record-group perf tools: Fix 'disabled' attribute config for record command 2012-11-14 16:52:03 -03:00
test-record-group1 perf tools: Fix 'disabled' attribute config for record command 2012-11-14 16:52:03 -03:00
test-record-no-delay perf tests: Add attr record no delay test 2012-11-05 14:02:09 -03:00
test-record-no-inherit perf tests: Add attr record no-inherit test 2012-11-01 17:08:40 -03:00
test-record-no-samples perf tests: Add attr record no samples test 2012-11-01 17:08:11 -03:00
test-record-period perf tests: Add attr record period test 2012-11-01 17:08:03 -03:00
test-record-raw perf tests: Add attr record raw test 2012-11-05 14:02:07 -03:00
test-stat-basic perf tests: Add missing attr stat basic test 2012-11-05 14:03:59 -03:00
test-stat-default perf tests: Add attr stat default test 2012-11-05 14:03:57 -03:00
test-stat-detailed-1 perf tests: Add attr stat default test 2012-11-05 14:03:57 -03:00
test-stat-detailed-2 perf tests: Add attr stat default test 2012-11-05 14:03:57 -03:00
test-stat-detailed-3 perf tests: Add attr stat default test 2012-11-05 14:03:57 -03:00
test-stat-group perf tests: Add attr stat group test 2012-11-05 14:02:37 -03:00
test-stat-group1 perf tools: Fix attributes for '{}' defined event groups 2012-11-14 16:51:50 -03:00
test-stat-no-inherit perf tests: Add attr stat no-inherit test 2012-11-05 14:02:30 -03:00

The struct perf_event_attr test (attr tests) support
====================================================
This testing support is embedded into perf directly and is governed
by the PERF_TEST_ATTR environment variable and hook inside the
sys_perf_event_open function.

The general idea is to store 'struct perf_event_attr' details for
each event created within single perf command. Each event details
are stored into separate text file. Once perf command is finished
these files are checked for values we expect for command.

The attr tests consist of following parts:

tests/attr.c
------------
This is the sys_perf_event_open hook implementation. The hook
is triggered when the PERF_TEST_ATTR environment variable is
defined. It must contain name of existing directory with access
and write permissions.

For each sys_perf_event_open call event details are stored in
separate file. Besides 'struct perf_event_attr' values we also
store 'fd' and 'group_fd' values to allow checking for groups.

tests/attr.py
-------------
This is the python script that does all the hard work. It reads
the test definition, executes it and checks results.

tests/attr/
-----------
Directory containing all attr test definitions.
Following tests are defined (with perf commands):

  perf record kill                              (test-record-basic)
  perf record -b kill                           (test-record-branch-any)
  perf record -j any kill                       (test-record-branch-filter-any)
  perf record -j any_call kill                  (test-record-branch-filter-any_call)
  perf record -j any_ret kill                   (test-record-branch-filter-any_ret)
  perf record -j hv kill                        (test-record-branch-filter-hv)
  perf record -j ind_call kill                  (test-record-branch-filter-ind_call)
  perf record -j k kill                         (test-record-branch-filter-k)
  perf record -j u kill                         (test-record-branch-filter-u)
  perf record -c 123 kill                       (test-record-count)
  perf record -d kill                           (test-record-data)
  perf record -F 100 kill                       (test-record-freq)
  perf record -g -- kill                        (test-record-graph-default)
  perf record -g dwarf -- kill                  (test-record-graph-dwarf)
  perf record -g fp kill                        (test-record-graph-fp)
  perf record --group -e cycles,instructions kill (test-record-group)
  perf record -e '{cycles,instructions}' kill   (test-record-group1)
  perf record -D kill                           (test-record-no-delay)
  perf record -i kill                           (test-record-no-inherit)
  perf record -n kill                           (test-record-no-samples)
  perf record -c 100 -P kill                    (test-record-period)
  perf record -R kill                           (test-record-raw)
  perf stat -e cycles kill                      (test-stat-basic)
  perf stat kill                                (test-stat-default)
  perf stat -d kill                             (test-stat-detailed-1)
  perf stat -dd kill                            (test-stat-detailed-2)
  perf stat -ddd kill                           (test-stat-detailed-3)
  perf stat --group -e cycles,instructions kill (test-stat-group)
  perf stat -e '{cycles,instructions}' kill     (test-stat-group1)
  perf stat -i -e cycles kill                   (test-stat-no-inherit)