diff options
| author | Howard Chu <howardchu95@gmail.com> | 2025-04-30 19:28:01 -0700 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2025-05-05 21:48:20 -0300 |
| commit | 282c195906c76ddf1e0951eb7b6ae85d9eb92293 (patch) | |
| tree | e9afd9cf4194d2a8b652a40fffc566b4bf5eecd7 /tools/perf/util/bpf_skel/off_cpu.bpf.c | |
| parent | 0f72027bb9fb77a2b2ea7d73e6d58bb9c0efb1e8 (diff) | |
perf record --off-cpu: Preparation of off-cpu BPF program
Set the perf_event map in BPF for dumping off-cpu samples, and set the
offcpu_thresh to specify the threshold.
Reviewed-by: Ian Rogers <irogers@google.com>
Signed-off-by: Howard Chu <howardchu95@gmail.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Tested-by: Gautam Menghani <gautam@linux.ibm.com>
Tested-by: Ian Rogers <irogers@google.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20241108204137.2444151-5-howardchu95@gmail.com
Link: https://lore.kernel.org/r/20250501022809.449767-4-howardchu95@gmail.com
[ Added some missing iteration variables to off_cpu_config() and fixed up
a manually edited patch hunk line boundary line ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/bpf_skel/off_cpu.bpf.c')
| -rw-r--r-- | tools/perf/util/bpf_skel/off_cpu.bpf.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/tools/perf/util/bpf_skel/off_cpu.bpf.c b/tools/perf/util/bpf_skel/off_cpu.bpf.c index c152116df72f..a5002e25b259 100644 --- a/tools/perf/util/bpf_skel/off_cpu.bpf.c +++ b/tools/perf/util/bpf_skel/off_cpu.bpf.c @@ -18,6 +18,8 @@ #define MAX_STACKS 32 #define MAX_ENTRIES 102400 +#define MAX_CPUS 4096 + struct tstamp_data { __u32 stack_id; __u32 state; @@ -40,6 +42,13 @@ struct { } stacks SEC(".maps"); struct { + __uint(type, BPF_MAP_TYPE_PERF_EVENT_ARRAY); + __uint(key_size, sizeof(int)); + __uint(value_size, sizeof(int)); + __uint(max_entries, MAX_CPUS); +} offcpu_output SEC(".maps"); + +struct { __uint(type, BPF_MAP_TYPE_TASK_STORAGE); __uint(map_flags, BPF_F_NO_PREALLOC); __type(key, int); |