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Shunsuke Nakamura 7a5a1f09c8 libperf tests: Fix test_stat_cpu 
[ Upstream commit 3ff6d64e68 ]

The `cpu` argument of perf_evsel__read() must specify the cpu index.

perf_cpu_map__for_each_cpu() is for iterating the cpu number (not index)
and is thus not appropriate for use with perf_evsel__read().

So, if there is an offline CPU, the cpu number specified in the argument
may point out of range because the cpu number and the cpu index are
different.

Fix test_stat_cpu().

Testing it:

  # make tests -C tools/lib/perf/
  make: Entering directory '/home/nakamura/kernel_src/linux-5.15-rc4_fix/tools/lib/perf'
  running static:
  - running tests/test-cpumap.c...OK
  - running tests/test-threadmap.c...OK
  - running tests/test-evlist.c...OK
  - running tests/test-evsel.c...OK
  running dynamic:
  - running tests/test-cpumap.c...OK
  - running tests/test-threadmap.c...OK
  - running tests/test-evlist.c...OK
  - running tests/test-evsel.c...OK
  make: Leaving directory '/home/nakamura/kernel_src/linux-5.15-rc4_fix/tools/lib/perf'

Signed-off-by: Shunsuke Nakamura <nakamura.shun@fujitsu.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20211011083704.4108720-1-nakamura.shun@fujitsu.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-10-27 09:56:55 +02:00
..
Documentation libperf: Fix man page typos 2020-08-13 09:34:26 -03:00
include perf jit: Let convert_timestamp() to be backwards-compatible 2021-05-14 09:50:44 +02:00
tests libperf tests: Fix test_stat_cpu 2021-10-27 09:56:55 +02:00
Build
core.c
cpumap.c libperf: Add NULL pointer check for cpu_map iteration and NULL assignment for all_cpus. 2020-05-05 16:35:29 -03:00
evlist.c perf evlist: Fix id index for heterogeneous systems 2021-01-27 11:55:11 +01:00
evsel.c
internal.h
lib.c
libperf.map
libperf.pc.template
Makefile
mmap.c
threadmap.c
xyarray.c