Messages in this thread Patch in this message | | | From | Neil Leeder <> | Subject | [PATCH v2] perf: qcom_l2: fix column exclusion check | Date | Tue, 25 Jul 2017 16:22:14 -0400 |
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The check for column exclusion did not verify that the event being checked was an L2 event, and not a software event. Software events should not be checked for column exclusion. This resulted in a group with both software and L2 events sometimes incorrectly rejecting the L2 event for column exclusion and not counting it.
Add a check for PMU type before applying column exclusion logic.
Fixes: 21bdbb7102ed ("perf: add qcom l2 cache perf events driver") Signed-off-by: Neil Leeder <nleeder@codeaurora.org> Acked-by: Mark Rutland <mark.rutland@arm.com> ---
Same code as v1, just added the tags to the commit text.
drivers/perf/qcom_l2_pmu.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/perf/qcom_l2_pmu.c b/drivers/perf/qcom_l2_pmu.c index c259848..b242cce 100644 --- a/drivers/perf/qcom_l2_pmu.c +++ b/drivers/perf/qcom_l2_pmu.c @@ -546,6 +546,7 @@ static int l2_cache_event_init(struct perf_event *event) } if ((event != event->group_leader) && + !is_software_event(event->group_leader) && (L2_EVT_GROUP(event->group_leader->attr.config) == L2_EVT_GROUP(event->attr.config))) { dev_dbg_ratelimited(&l2cache_pmu->pdev->dev, @@ -558,6 +559,7 @@ static int l2_cache_event_init(struct perf_event *event) list_for_each_entry(sibling, &event->group_leader->sibling_list, group_entry) { if ((sibling != event) && + !is_software_event(sibling) && (L2_EVT_GROUP(sibling->attr.config) == L2_EVT_GROUP(event->attr.config))) { dev_dbg_ratelimited(&l2cache_pmu->pdev->dev, -- Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies Inc. Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.
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