linux-stable.git/tools/perf/tests/attr, branch v6.2

perf evlist: Remove group option.

2022-12-14T18:28:18+00:00

The group option predates grouping events using curly braces added in
commit 89efb029502d7f2d ("perf tools: Add support to parse event group
syntax").

The --group option was retained for legacy support (in August
2012) but keeping it adds complexity.

Signed-off-by: Ian Rogers 
Cc: Adrian Hunter 
Cc: Alexander Shishkin 
Cc: Alexey Bayduraev 
Cc: Andi Kleen 
Cc: Anshuman Khandual 
Cc: Athira Jajeev 
Cc: Eelco Chaudron 
Cc: German Gomez 
Cc: Ingo Molnar 
Cc: James Clark 
Cc: Jiri Olsa 
Cc: Kan Liang 
Cc: Kim Phillips 
Cc: Leo Yan 
Cc: Mark Rutland 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Riccardo Mancini 
Cc: Sandipan Das 
Cc: Sean Christopherson 
Cc: Shaomin Deng 
Cc: Stephane Eranian 
Cc: Timothy Hayes 
Cc: Xing Zhengjun 
Cc: bpf@vger.kernel.org
Link: https://lore.kernel.org/r/20221213232651.1269909-6-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo

perf test arm64: Add attr tests for new VG register

2022-12-14T14:24:32+00:00

Ensure that the availability of the VG register behaves as expected
depending on the kernel version and SVE support.

Signed-off-by: James Clark 
Cc: Alexander Shishkin 
Cc: Ingo Molnar 
Cc: Jiri Olsa 
Cc: Mark Rutland 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: bpf@vger.kernel.org
Link: https://lore.kernel.org/r/20221213114739.2312862-5-james.clark@arm.com
Signed-off-by: Arnaldo Carvalho de Melo

perf test: Fix attr tests for PERF_FORMAT_LOST

2022-10-15T13:13:16+00:00

Since PERF_FORMAT_LOST was added, the default read format has that bit
set, so add it to the tests. Keep the old value as well so that the test
still passes on older kernels.

This fixes the following failure:

  expected read_format=0|4, got 20
  FAILED './tests/attr/test-record-C0' - match failure

Fixes: 85b425f31c8866e0 ("perf record: Set PERF_FORMAT_LOST by default")
Signed-off-by: James Clark 
Acked-by: Namhyung Kim 
Cc: Adrian Hunter 
Cc: Alexander Shishkin 
Cc: Ingo Molnar 
Cc: Jiri Olsa 
Cc: Mark Rutland 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Link: https://lore.kernel.org/r/20221012094633.21669-2-james.clark@arm.com
Signed-off-by: Arnaldo Carvalho de Melo

perf test: Add perf_event_attr test for Arm SPE

2022-04-28T13:40:49+00:00

Adds a perf_event_attr test for Arm SPE in which the presence of
physical addresses are checked when SPE unit is run with pa_enable=1.

Reviewed-by: Leo Yan 
Signed-off-by: Timothy Hayes 
Tested-by: Leo Yan 
Cc: Alexander Shishkin 
Cc: Jiri Olsa 
Cc: John Fastabend 
Cc: John Garry 
Cc: KP Singh 
Cc: Mark Rutland 
Cc: Martin KaFai Lau 
Cc: Mathieu Poirier 
Cc: Namhyung Kim 
Cc: Song Liu 
Cc: Will Deacon 
Cc: Yonghong Song 
Cc: bpf@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: netdev@vger.kernel.org
Link: https://lore.kernel.org/r/20220421165205.117662-4-timothy.hayes@arm.com
Signed-off-by: Arnaldo Carvalho de Melo

perf test: Add perf_event_attr tests for the arm_spe event

2022-03-05T19:00:12+00:00

Adds a couple of perf_event_attr tests for the fix introduced in [1].
The tests check that the correct sample_period value is set in the
struct perf_event_attr of the arm_spe events.

[1]: https://lore.kernel.org/all/20220118144054.2541-1-german.gomez@arm.com/

Reviewed-by: James Clark 
Signed-off-by: German Gomez 
Tested-by: Leo Yan 
Cc: Alexander Shishkin 
Cc: Jiri Olsa 
Cc: John Fastabend 
Cc: KP Singh 
Cc: Mark Rutland 
Cc: Martin KaFai Lau 
Cc: Namhyung Kim 
Cc: Song Liu 
Cc: Yonghong Song 
Link: https://lore.kernel.org/r/20220126160710.32983-1-german.gomez@arm.com
Signed-off-by: Arnaldo Carvalho de Melo

perf test: Fix arm64 perf_event_attr tests wrt --call-graph initialization

2022-02-16T16:51:47+00:00

The struct perf_event_attr is initialised differently in Arm64 when
recording in call-graph fp mode, so update the relevant tests, and add
two extra arm64-only tests.

Before:

  $ perf test 17 -v
  17: Setup struct perf_event_attr
  [...]
  running './tests/attr/test-record-graph-default'
  expected sample_type=295, got 4391
  expected sample_regs_user=0, got 1073741824
  FAILED './tests/attr/test-record-graph-default' - match failure
  test child finished with -1
  ---- end ----

After:

[...]
  running './tests/attr/test-record-graph-default-aarch64'
  test limitation 'aarch64'
  running './tests/attr/test-record-graph-fp-aarch64'
  test limitation 'aarch64'
  running './tests/attr/test-record-graph-default'
  test limitation '!aarch64'
  excluded architecture list ['aarch64']
  skipped [aarch64] './tests/attr/test-record-graph-default'
  running './tests/attr/test-record-graph-fp'
  test limitation '!aarch64'
  excluded architecture list ['aarch64']
  skipped [aarch64] './tests/attr/test-record-graph-fp'
[...]

Fixes: 7248e308a5758761 ("perf tools: Record ARM64 LR register automatically")
Signed-off-by: German Gomez 
Cc: Alexander Shishkin 
Cc: Alexandre Truong 
Cc: Ian Rogers 
Cc: James Clark 
Cc: Jiri Olsa 
Cc: John Fastabend 
Cc: KP Singh 
Cc: Mark Rutland 
Cc: Martin KaFai Lau 
Cc: Namhyung Kim 
Cc: Song Liu 
Cc: Yonghong Song 
Link: http://lore.kernel.org/lkml/20220125104435.2737-1-german.gomez@arm.com
Signed-off-by: Arnaldo Carvalho de Melo

perf tests attr: Add missing topdown metrics events

2021-10-05T17:55:38+00:00

The Topdown metrics events were added as 'perf stat' default events
since commit 42641d6f4d15e6db ("perf stat: Add Topdown metrics events as
default events").

However, the perf attr tests were not updated
accordingly.

The perf attr test fails on the platform which supports Topdown metrics.

  # perf test 17

    17: Setup struct perf_event_attr        :FAILED!

Add Topdown metrics events into perf attr test cases. Make them optional
since they are only available on newer platforms.

Fixes: 42641d6f4d15e6db ("perf stat: Add Topdown metrics events as default events")
Reported-by: kernel test robot 
Signed-off-by: Kan Liang 
Cc: Andi Kleen 
Cc: Jiri Olsa 
Link: http://lore.kernel.org/lkml/1633031566-176517-1-git-send-email-kan.liang@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo

perf test: Test 17 fails with make LIBPFM4=1 on s390 z/VM

2021-06-01T13:57:39+00:00

This test case fails on s390 virtual machine z/VM which has no PMU support
when the perf tool is built with LIBPFM4=1.

Using make LIBPFM4=1 builds the perf tool with support for libpfm
event notation. The command line flag --pfm-events is valid:
 # ./perf record --pfm-events cycles -- true
 [ perf record: Woken up 1 times to write data ]
 [ perf record: Captured and wrote 0.001 MB perf.data (2 samples) ]
 #

However the command 'perf test -Fv 17' fails on s390 z/VM virtual machine
with LIBPFM4=1:
  # perf test -Fv 17
  17: Setup struct perf_event_attr                                    :
  --- start ---
  .....
  running './tests/attr/test-record-group2'
  unsupp  './tests/attr/test-record-group2'
  running './tests/attr/test-record-pfm-period'
  expected exclude_hv=0, got 1
 FAILED './tests/attr/test-record-pfm-period' - match failure
 ---- end ----
 Setup struct perf_event_attr: FAILED!

When --pfm-event system is not supported, the test returns unsupported
and continues. Here is an example using a virtual machine on x86 and
Fedora 34:
 [root@f33 perf]# perf test -Fv 17
 17: Setup struct perf_event_attr                                    :
 --- start ---
 .....
 running './tests/attr/test-record-group2'
 unsupp  './tests/attr/test-record-group2'
 running './tests/attr/test-record-pfm-period'
 unsupp  './tests/attr/test-record-pfm-period'
 ....

The issue is file ./tests/attr/test-record-pfm-period
which requires perf event attribute member exclude_hv to be zero.
This is not the case on s390 where the value of exclude_hv is one when
executing on a z/VM virtual machine without PMU hardware support.

Fix this by allowing value exlucde_hv to be zero or one.

Output before:
 # /usr/bin/python ./tests/attr.py -d ./tests/attr/ -t \
	test-record-pfm-period -p ./perf  -vvv 2>&1| fgrep match
    matching [event:base-record]
    match: [event:base-record] matches []
 FAILED './tests/attr//test-record-pfm-period' - match failure
 #

Output after:
 # /usr/bin/python ./tests/attr.py -d ./tests/attr/ -t \
	test-record-pfm-period -p ./perf  -vvv 2>&1| fgrep match
    matching [event:base-record]
    match: [event:base-record] matches ['event-1-0-6', 'event-1-0-5']
  matched

Background:
Using libpfm library ends up in this function call sequence

pfm_get_perf_event_encoding()
+-- pfm_get_os_event_encoding()
    +-- pfmlib_perf_event_encode()

is called when no hardware specific PMU unit can be detected
as in the s390 z/VM virtual machine case. This uses the
"perf_events generic PMU" data structure which sets exclude_hv
to 1 per default.  Using this PMU that test case always fails.

That is the reason why exclude_hv attribute setting varies.

Version 2:

   As suggested by Ian Rogers make perf_event_attribute member
   exclude_hv more robust and accept value 0 or 1 to handle more
   test cases which might fail on s390 virtual machine z/VM.

Suggested-by: Ian Rogers 
Signed-off-by: Thomas Richter 
Reviewed-by: Ian Rogers 
Cc: Heiko Carstens 
Cc: Ian Rogers 
Cc: Sumanth Korikkar 
Cc: Sven Schnelle 
Cc: Vasily Gorbik 
Link: http://lore.kernel.org/lkml/20210528091050.245838-1-tmricht@linux.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo

tools headers UAPI: Sync perf_event.h with the kernel sources

2021-05-10T12:01:01+00:00

To pick up the changes in:

  2b26f0aa004995f4 ("perf: Support only inheriting events if cloned with CLONE_THREAD")
  2e498d0a74e5b88a ("perf: Add support for event removal on exec")
  547b60988e631f74 ("perf: aux: Add flags for the buffer format")
  55bcf6ef314ae8ba ("perf: Extend PERF_TYPE_HARDWARE and PERF_TYPE_HW_CACHE")
  7dde51767ca5339e ("perf: aux: Add CoreSight PMU buffer formats")
  97ba62b278674293 ("perf: Add support for SIGTRAP on perf events")
  d0d1dd628527c77d ("perf core: Add PERF_COUNT_SW_CGROUP_SWITCHES event")

Also change the expected sizeof(struct perf_event_attr) from 120 to 128 due to
fields being added for the SIGTRAP changes.

Addressing this perf build warning:

  Warning: Kernel ABI header at 'tools/include/uapi/linux/perf_event.h' differs from latest version at 'include/uapi/linux/perf_event.h'
  diff -u tools/include/uapi/linux/perf_event.h include/uapi/linux/perf_event.h

Cc: Kan Liang 
Cc: Marco Elver 
Cc: Mathieu Poirier 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Suzuki K Poulose 
Signed-off-by: Arnaldo Carvalho de Melo

perf test: Leader sampling shouldn't clear sample period

2020-09-14T22:35:22+00:00

Add test that a sibling with leader sampling doesn't have its period
cleared.

Signed-off-by: Ian Rogers 
Acked-by: Jiri Olsa 
Cc: Adrian Hunter 
Cc: Alexander Shishkin 
Cc: Alexei Starovoitov 
Cc: Andi Kleen 
Cc: Andrii Nakryiko 
Cc: Athira Jajeev 
Cc: Daniel Borkmann 
Cc: John Fastabend 
Cc: KP Singh 
Cc: Mark Rutland 
Cc: Martin KaFai Lau 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Song Liu 
Cc: Stephane Eranian 
Cc: Yonghong Song 
Cc: bpf@vger.kernel.org
Cc: netdev@vger.kernel.org
Link: http://lore.kernel.org/lkml/20200912025655.1337192-5-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo