diff options
| author | Ian Rogers <irogers@google.com> | 2025-06-13 17:45:28 -0700 |
|---|---|---|
| committer | Namhyung Kim <namhyung@kernel.org> | 2025-06-20 13:14:07 -0700 |
| commit | 588d22b40480bca9efdb6e24d253baaa5165884c (patch) | |
| tree | 1bf41000d0fe1b511ea6a83c1b227451663ea451 /tools/perf/util/affinity.c | |
| parent | ce3d5af2a92bd6cd775ce819f5e83857e8a277fb (diff) | |
perf test: Expand user space event reading (rdpmc) tests
Test that disabling rdpmc support via /sys/bus/event_source/cpu*/rdpmc
disables reading in the mmap (libperf read support will fallback to
using a system call).
Test all hybrid PMUs support rdpmc.
Ensure hybrid PMUs use the correct CPU to rdpmc the correct
event. Previously the test would open cycles or instructions with no
extended type then rdpmc it on whatever CPU. This could fail/skip due
to which CPU the test was scheduled upon.
Signed-off-by: Ian Rogers <irogers@google.com>
Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Link: https://lore.kernel.org/r/20250614004528.1652860-1-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Diffstat (limited to 'tools/perf/util/affinity.c')
| -rw-r--r-- | tools/perf/util/affinity.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/tools/perf/util/affinity.c b/tools/perf/util/affinity.c index 38dc4524b7e8..4fe851334296 100644 --- a/tools/perf/util/affinity.c +++ b/tools/perf/util/affinity.c @@ -5,6 +5,7 @@ #include <stdlib.h> #include <linux/bitmap.h> #include <linux/zalloc.h> +#include <perf/cpumap.h> #include "perf.h" #include "cpumap.h" #include "affinity.h" @@ -83,3 +84,20 @@ void affinity__cleanup(struct affinity *a) if (a != NULL) __affinity__cleanup(a); } + +void cpu_map__set_affinity(const struct perf_cpu_map *cpumap) +{ + int cpu_set_size = get_cpu_set_size(); + unsigned long *cpuset = bitmap_zalloc(cpu_set_size * 8); + struct perf_cpu cpu; + int idx; + + if (!cpuset) + return; + + perf_cpu_map__for_each_cpu_skip_any(cpu, idx, cpumap) + __set_bit(cpu.cpu, cpuset); + + sched_setaffinity(0, cpu_set_size, (cpu_set_t *)cpuset); + zfree(&cpuset); +} |