diff options
Diffstat (limited to 'tools/tracing/rtla/src/timerlat.bpf.c')
| -rw-r--r-- | tools/tracing/rtla/src/timerlat.bpf.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/tools/tracing/rtla/src/timerlat.bpf.c b/tools/tracing/rtla/src/timerlat.bpf.c index 96196d46e170..084cd10c21fc 100644 --- a/tools/tracing/rtla/src/timerlat.bpf.c +++ b/tools/tracing/rtla/src/timerlat.bpf.c @@ -29,6 +29,13 @@ struct { } summary_irq SEC(".maps"), summary_thread SEC(".maps"), summary_user SEC(".maps"); struct { + __uint(type, BPF_MAP_TYPE_ARRAY); + __uint(max_entries, 1); + __type(key, unsigned int); + __type(value, unsigned long long); +} stop_tracing SEC(".maps"); + +struct { __uint(type, BPF_MAP_TYPE_RINGBUF); __uint(max_entries, 1); } signal_stop_tracing SEC(".maps"); @@ -41,8 +48,6 @@ const volatile int irq_threshold; const volatile int thread_threshold; const volatile bool aa_only; -int stop_tracing; - nosubprog unsigned long long map_get(void *map, unsigned int key) { @@ -109,7 +114,7 @@ nosubprog void set_stop_tracing(void) int value = 0; /* Suppress further sample processing */ - stop_tracing = 1; + map_set(&stop_tracing, 0, 1); /* Signal to userspace */ bpf_ringbuf_output(&signal_stop_tracing, &value, sizeof(value), 0); @@ -121,7 +126,7 @@ int handle_timerlat_sample(struct trace_event_raw_timerlat_sample *tp_args) unsigned long long latency, latency_us; int bucket; - if (stop_tracing) + if (map_get(&stop_tracing, 0)) return 0; latency = tp_args->timer_latency / output_divisor; |