Messages in this thread Patch in this message | | | From | weilin.wang@intel ... | Subject | [RFC PATCH v4 12/15] perf stat: Handle NMI in hardware-grouping | Date | Thu, 8 Feb 2024 19:14:38 -0800 |
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From: Weilin Wang <weilin.wang@intel.com>
Add an easy nmi watchdog support in grouping. When nmi watchdog is enabled, we reduce the total num of events could be assigned to one group by 1. A more efficient solution will be added in later.
Signed-off-by: Weilin Wang <weilin.wang@intel.com> --- tools/perf/util/metricgroup.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/tools/perf/util/metricgroup.c b/tools/perf/util/metricgroup.c index 95d3868819e3..f1eb73957765 100644 --- a/tools/perf/util/metricgroup.c +++ b/tools/perf/util/metricgroup.c @@ -1947,6 +1947,10 @@ static int insert_new_group(struct list_head *head, size_t num_fixed_counters) { INIT_LIST_HEAD(&new_group->event_head); + if (sysctl__nmi_watchdog_enabled()) { + pr_debug("NMI watchdog is enabled. Reduce num of counters by 1\n"); + num_counters -= 1; + } fill_counter_bitmap(new_group->gp_counters, 0, num_counters); fill_counter_bitmap(new_group->fixed_counters, 0, num_fixed_counters); new_group->taken_alone = false; -- 2.42.0
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