Messages in this thread Patch in this message | ![/](/images/icornerl.gif) | | From | weilin.wang@intel ... | Subject | [RFC PATCH v5 12/16] perf stat: Handle NMI in hardware-grouping | Date | Fri, 12 Apr 2024 14:07:52 -0700 |
| |
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.
Reviewed-by: Ian Rogers <irogers@google.com> 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 9548654c9f6d..31036035484c 100644 --- a/tools/perf/util/metricgroup.c +++ b/tools/perf/util/metricgroup.c @@ -1993,6 +1993,10 @@ static int insert_new_group(struct list_head *head, size_t counters_num_fixed) { 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"); + counters_num_gp -= 1; + } fill_counter_bitmap(new_group->gp_counters, 0, counters_num_gp); fill_counter_bitmap(new_group->fixed_counters, 0, counters_num_fixed); list_add_tail(&new_group->nd, head); -- 2.42.0
| ![\](/images/icornerr.gif) |