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Date: Sun, 27 Mar 2022 23:24:09 -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@...nel.org>,
Namhyung Kim <namhyung@...nel.org>,
Mathieu Poirier <mathieu.poirier@...aro.org>,
Suzuki K Poulose <suzuki.poulose@....com>,
Mike Leach <mike.leach@...aro.org>,
Leo Yan <leo.yan@...aro.org>,
John Garry <john.garry@...wei.com>,
Will Deacon <will@...nel.org>,
Alexei Starovoitov <ast@...nel.org>,
Daniel Borkmann <daniel@...earbox.net>,
Andrii Nakryiko <andrii@...nel.org>,
Martin KaFai Lau <kafai@...com>,
Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
John Fastabend <john.fastabend@...il.com>,
KP Singh <kpsingh@...nel.org>,
Kajol Jain <kjain@...ux.ibm.com>,
James Clark <james.clark@....com>,
German Gomez <german.gomez@....com>,
Adrian Hunter <adrian.hunter@...el.com>,
Riccardo Mancini <rickyman7@...il.com>,
Andi Kleen <ak@...ux.intel.com>,
Alexey Bayduraev <alexey.v.bayduraev@...ux.intel.com>,
Alexander Antonov <alexander.antonov@...ux.intel.com>,
linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
coresight@...ts.linaro.org, linux-arm-kernel@...ts.infradead.org,
netdev@...r.kernel.org, bpf@...r.kernel.org
Cc: Stephane Eranian <eranian@...gle.com>,
Ian Rogers <irogers@...gle.com>
Subject: [PATCH 0/5] Make evlist CPUs more accurate
evlist has all_cpus, computed to be the merge of all evsel CPU maps,
and cpus. cpus may contain more CPUs than all_cpus, as by default cpus
holds all online CPUs whilst all_cpus holds the merge/union from
evsels. For an uncore event there may just be 1 CPU per socket, which
will be a far smaller CPU map than all online CPUs.
These patches change cpus to be called user_cpus, to reflect their
potential user specified nature. The user_cpus are set to be the
current value intersected with all_cpus, so that user_cpus is always a
subset of all_cpus. This fixes printing code for metrics so that
unnecessary blank lines aren't printed.
To make the intersect function perform well, a perf_cpu_map__is_subset
function is added. While adding this function, also use it in
perf_cpu_map__merge to avoid creating a new CPU map for some currently
missed patterns.
Ian Rogers (5):
perf evlist: Rename cpus to user_cpus
perf cpumap: More cpu map reuse by merge.
perf cpumap: Add intersect function.
perf stat: Avoid segv if core.user_cpus isn't set.
perf evlist: Respect all_cpus when setting user_cpus
tools/lib/perf/cpumap.c | 76 ++++++++++++++++++++----
tools/lib/perf/evlist.c | 28 ++++-----
tools/lib/perf/include/internal/evlist.h | 4 +-
tools/lib/perf/include/perf/cpumap.h | 2 +
tools/perf/arch/arm/util/cs-etm.c | 8 +--
tools/perf/arch/arm64/util/arm-spe.c | 2 +-
tools/perf/arch/x86/util/intel-bts.c | 2 +-
tools/perf/arch/x86/util/intel-pt.c | 4 +-
tools/perf/bench/evlist-open-close.c | 2 +-
tools/perf/builtin-ftrace.c | 2 +-
tools/perf/builtin-record.c | 6 +-
tools/perf/builtin-stat.c | 11 ++--
tools/perf/builtin-top.c | 2 +-
tools/perf/util/auxtrace.c | 2 +-
tools/perf/util/bpf_ftrace.c | 4 +-
tools/perf/util/evlist.c | 16 ++---
tools/perf/util/record.c | 6 +-
tools/perf/util/sideband_evlist.c | 2 +-
tools/perf/util/stat-display.c | 2 +-
tools/perf/util/synthetic-events.c | 2 +-
tools/perf/util/top.c | 6 +-
21 files changed, 127 insertions(+), 62 deletions(-)
--
2.35.1.1021.g381101b075-goog
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