perf record: Fix cpu mask bit setting for mixed mmaps
authorAdrian Hunter <adrian.hunter@intel.com>
Thu, 15 Sep 2022 12:26:11 +0000 (15:26 +0300)
committerArnaldo Carvalho de Melo <acme@redhat.com>
Wed, 21 Sep 2022 19:08:00 +0000 (16:08 -0300)
commitca76d7d2812b46124291f99c9b50aaf63a936f23
tree74ae499d28c38d0d65d08b3e33b838bed7c39c31
parente1dda48e4370043443e7d121d4b67a96fb70c75b
perf record: Fix cpu mask bit setting for mixed mmaps

With mixed per-thread and (system-wide) per-cpu maps, the "any cpu" value
 -1 must be skipped when setting CPU mask bits.

Prior to commit cbd7bfc7fd99acdd ("tools/perf: Fix out of bound access
to cpu mask array") the invalid setting went unnoticed, but since then
it causes perf record to fail with an error.

Example:

 Before:

   $ perf record -e intel_pt// --per-thread uname
   Failed to initialize parallel data streaming masks

 After:

   $ perf record -e intel_pt// --per-thread uname
   Linux
   [ perf record: Woken up 1 times to write data ]
   [ perf record: Captured and wrote 0.068 MB perf.data ]

Fixes: ae4f8ae16a078964 ("libperf evlist: Allow mixing per-thread and per-cpu mmaps")
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20220915122612.81738-2-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
tools/perf/builtin-record.c