From: Yicong Yang <yangyicong@xxxxxxxxxxxxx> The PTT trace collects PCIe TLP headers from the PCIe link and don't have the ability to exclude certain context. It doesn't support itrace as well. So only advertise PERF_PMU_CAP_NO_EXCLUDE. This will greatly save the storage of final data. Tested tracing idle link for ~15s, without this patch we'll collect ~28.682MB data for context related information and with this patch it reduced to ~0.226MB. Signed-off-by: Yicong Yang <yangyicong@xxxxxxxxxxxxx> --- drivers/hwtracing/ptt/hisi_ptt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/hwtracing/ptt/hisi_ptt.c b/drivers/hwtracing/ptt/hisi_ptt.c index 65f4288a1915..b9917db849bf 100644 --- a/drivers/hwtracing/ptt/hisi_ptt.c +++ b/drivers/hwtracing/ptt/hisi_ptt.c @@ -1210,7 +1210,7 @@ static int hisi_ptt_register_pmu(struct hisi_ptt *hisi_ptt) hisi_ptt->hisi_ptt_pmu = (struct pmu) { .module = THIS_MODULE, - .capabilities = PERF_PMU_CAP_EXCLUSIVE | PERF_PMU_CAP_ITRACE, + .capabilities = PERF_PMU_CAP_NO_EXCLUDE, .task_ctx_nr = perf_sw_context, .attr_groups = hisi_ptt_pmu_groups, .event_init = hisi_ptt_pmu_event_init, -- 2.24.0