Commit c6071af9 authored by Yicong Yang's avatar Yicong Yang Committed by Zhou Juan
Browse files

hwtracing: hisi_ptt: Advertise PERF_PMU_CAP_NO_EXCLUDE for PTT PMU 

driver inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I7BZYX


CVE: NA

Reference: NA

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From: Yicong Yang <yangyicong@hisilicon.com>

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.

Reviewed-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: default avatarYicong Yang <yangyicong@hisilicon.com>
parent 4225101e

drivers/hwtracing/ptt/hisi_ptt.c

+1 −1
Original line number Diff line number Diff line
@@ -1212,7 +1212,7 @@ 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,