linux-kernel - [PATCH 3/5] perf cpumap: Add perf_cpu_map__for_each

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Date:   Wed, 18 May 2022 20:20:03 -0700
From:   Ian Rogers <irogers@...gle.com>
To:     Michael Petlan <mpetlan@...hat.com>,
        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>,
        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>,
        James Clark <james.clark@....com>,
        Kan Liang <kan.liang@...ux.intel.com>,
        Quentin Monnet <quentin@...valent.com>,
        Dave Marchevsky <davemarchevsky@...com>,
        Zhengjun Xing <zhengjun.xing@...ux.intel.com>,
        Lv Ruyi <lv.ruyi@....com.cn>, linux-perf-users@...r.kernel.org,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        bpf@...r.kernel.org
Cc:     Stephane Eranian <eranian@...gle.com>,
        Ian Rogers <irogers@...gle.com>
Subject: [PATCH 3/5] perf cpumap: Add perf_cpu_map__for_each_idx

A variant of perf_cpu_map__for_each_cpu that just iterates index values
without the corresponding load of the CPU.

Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/lib/perf/include/perf/cpumap.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/lib/perf/include/perf/cpumap.h b/tools/lib/perf/include/perf/cpumap.h
index 4a2edbdb5e2b..24de795b09bb 100644
--- a/tools/lib/perf/include/perf/cpumap.h
+++ b/tools/lib/perf/include/perf/cpumap.h
@@ -31,4 +31,7 @@ LIBPERF_API bool perf_cpu_map__has(const struct perf_cpu_map *map, struct perf_c
 	     (idx) < perf_cpu_map__nr(cpus);			\
 	     (idx)++, (cpu) = perf_cpu_map__cpu(cpus, idx))
 
+#define perf_cpu_map__for_each_idx(idx, cpus)				\
+	for ((idx) = 0; (idx) < perf_cpu_map__nr(cpus); (idx)++)
+
 #endif /* __LIBPERF_CPUMAP_H */
-- 
2.36.1.124.g0e6072fb45-goog