diff options
| author |   Mark Brown <broonie@kernel.org> | 2017-11-28 16:19:52 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2017-11-28 16:19:52 +0000 |
| commit | 69830d3909849dee33b9a2de88ece3d59c75a1b8 (patch) | |
| tree | 67e22ac989e782ddc104f186dee54d1675e76923 /samples/bpf/trace_event_kern.c | |
| parent | ASoC: rk3399_gru_sound: Map BTN_0 to KEY_PLAYPAUSE (diff) | |
| parent | ASoC: add snd_soc_disconnect_sync() (diff) | |
| download | linux-dev-69830d3909849dee33b9a2de88ece3d59c75a1b8.tar.xz linux-dev-69830d3909849dee33b9a2de88ece3d59c75a1b8.zip | |
Merge branch 'topic/disconnect' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into asoc-rcar
Diffstat (limited to 'samples/bpf/trace_event_kern.c')
| -rw-r--r-- | samples/bpf/trace_event_kern.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/samples/bpf/trace_event_kern.c b/samples/bpf/trace_event_kern.c index 41b6115a32eb..a77a583d94d4 100644 --- a/samples/bpf/trace_event_kern.c +++ b/samples/bpf/trace_event_kern.c @@ -37,10 +37,14 @@ struct bpf_map_def SEC("maps") stackmap = { SEC("perf_event") int bpf_prog1(struct bpf_perf_event_data *ctx) { + char time_fmt1[] = "Time Enabled: %llu, Time Running: %llu"; + char time_fmt2[] = "Get Time Failed, ErrCode: %d"; char fmt[] = "CPU-%d period %lld ip %llx"; u32 cpu = bpf_get_smp_processor_id(); + struct bpf_perf_event_value value_buf; struct key_t key; u64 *val, one = 1; + int ret; if (ctx->sample_period < 10000) /* ignore warmup */ @@ -54,6 +58,12 @@ int bpf_prog1(struct bpf_perf_event_data *ctx) return 0; } + ret = bpf_perf_prog_read_value(ctx, (void *)&value_buf, sizeof(struct bpf_perf_event_value)); + if (!ret) + bpf_trace_printk(time_fmt1, sizeof(time_fmt1), value_buf.enabled, value_buf.running); + else + bpf_trace_printk(time_fmt2, sizeof(time_fmt2), ret); + val = bpf_map_lookup_elem(&counts, &key); if (val) (*val)++; |