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Date: Fri, 11 Sep 2020 19:56:52 -0700 From: Ian Rogers <irogers@...gle.com> To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, Arnaldo Carvalho de Melo <acme@...nel.org>, Mark Rutland <mark.rutland@....com>, Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...hat.com>, Namhyung Kim <namhyung@...nel.org>, Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>, Martin KaFai Lau <kafai@...com>, Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>, Andrii Nakryiko <andriin@...com>, John Fastabend <john.fastabend@...il.com>, KP Singh <kpsingh@...omium.org>, Adrian Hunter <adrian.hunter@...el.com>, Andi Kleen <ak@...ux.intel.com>, Athira Rajeev <atrajeev@...ux.vnet.ibm.com>, linux-kernel@...r.kernel.org, netdev@...r.kernel.org, bpf@...r.kernel.org Cc: Stephane Eranian <eranian@...gle.com>, David Sharp <dhsharp@...gle.com>, Ian Rogers <irogers@...gle.com> Subject: [PATCH v3 1/4] perf record: Set PERF_RECORD_PERIOD if attr->freq is set. From: David Sharp <dhsharp@...gle.com> evsel__config() would only set PERF_RECORD_PERIOD if it set attr->freq from perf record options. When it is set by libpfm events, it would not get set. This changes evsel__config to see if attr->freq is set outside of whether or not it changes attr->freq itself. Signed-off-by: David Sharp <dhsharp@...gle.com> Signed-off-by: Ian Rogers <irogers@...gle.com> --- tools/perf/util/evsel.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index fd865002cbbd..3e985016da7e 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -979,13 +979,18 @@ void evsel__config(struct evsel *evsel, struct record_opts *opts, if (!attr->sample_period || (opts->user_freq != UINT_MAX || opts->user_interval != ULLONG_MAX)) { if (opts->freq) { - evsel__set_sample_bit(evsel, PERIOD); attr->freq = 1; attr->sample_freq = opts->freq; } else { attr->sample_period = opts->default_interval; } } + /* + * If attr->freq was set (here or earlier), ask for period + * to be sampled. + */ + if (attr->freq) + evsel__set_sample_bit(evsel, PERIOD); if (opts->no_samples) attr->sample_freq = 0; -- 2.28.0.618.gf4bc123cb7-goog
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