https://github.com/torvalds/linux
Revision 3606c0e1a1050d397ad759a62607e419fd8b0ccb authored by German Gomez on 18 January 2022, 14:40:54 UTC, committed by Arnaldo Carvalho de Melo on 22 January 2022, 20:15:47 UTC
A previous patch preventing "attr->sample_period" values from being overridden in pfm events changed a related behaviour in arm-spe. Before said patch: perf record -c 10000 -e arm_spe_0// -- sleep 1 Would yield an SPE event with period=10000. After the patch, the period in "-c 10000" was being ignored because the arm-spe code initializes sample_period to a non-zero value. This patch restores the previous behaviour for non-libpfm4 events. Fixes: ae5dcc8abe31 (“perf record: Prevent override of attr->sample_period for libpfm4 events”) Reported-by: Chase Conklin <chase.conklin@arm.com> Signed-off-by: German Gomez <german.gomez@arm.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: John Fastabend <john.fastabend@gmail.com> Cc: KP Singh <kpsingh@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Martin KaFai Lau <kafai@fb.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Song Liu <songliubraving@fb.com> Cc: Stephane Eranian <eranian@google.com> Cc: Yonghong Song <yhs@fb.com> Cc: bpf@vger.kernel.org Cc: netdev@vger.kernel.org Link: http://lore.kernel.org/lkml/20220118144054.2541-1-german.gomez@arm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Tip revision: 3606c0e1a1050d397ad759a62607e419fd8b0ccb authored by German Gomez on 18 January 2022, 14:40:54 UTC
perf evsel: Override attr->sample_period for non-libpfm4 events
perf evsel: Override attr->sample_period for non-libpfm4 events
Tip revision: 3606c0e
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