linux/tools/lib/perf
Ian Rogers ff8548172f perf evlist: Special map propagation for tool events that read on 1 CPU
Tool events like duration_time don't need a perf_cpu_map that contains
all online CPUs.

Having such a perf_cpu_map causes overheads when iterating between
events for CPU affinity.

During parsing mark events that just read on a single CPU map index as
such, then during map propagation set up the evsel's CPUs and thereby
the evlists accordingly.

The setting cannot be done early in parsing as user CPUs are only fully
known when evlist__create_maps is called.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andres Freund <andres@anarazel.de>
Cc: Dapeng Mi <dapeng1.mi@linux.intel.com>
Cc: Dr. David Alan Gilbert <linux@treblig.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Falcon <thomas.falcon@intel.com>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Cc: Yang Li <yang.lee@linux.alibaba.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2026-02-10 09:33:28 -03:00
..
Documentation perf sched stats: Add record and rawdump support 2026-01-22 12:29:28 -03:00
include perf evlist: Special map propagation for tool events that read on 1 CPU 2026-02-10 09:33:28 -03:00
tests
.gitignore
Build
Makefile libperf build: Always place libperf includes first 2026-02-03 18:01:27 -03:00
core.c
cpumap.c libperf cpumap: Fix perf_cpu_map__max for an empty/NULL map 2025-12-04 00:36:14 -08:00
evlist.c perf evlist: Special map propagation for tool events that read on 1 CPU 2026-02-10 09:33:28 -03:00
evsel.c libperf evsel: Factor perf_evsel__exit out of perf_evsel__delete 2025-07-24 13:41:35 -07:00
internal.h
lib.c
libperf.map libperf cpumap: Remove perf_cpu_map__read() 2024-12-09 17:52:41 -03:00
libperf.pc.template
mmap.c libperf mmap: In user mmap rdpmc avoid undefined behavior 2025-10-02 15:02:47 -03:00
threadmap.c libperf threadmap: Add perf_thread_map__idx() 2025-05-21 15:07:13 -03:00
xyarray.c