diff mbox series

[RFC,v4,12/15] perf stat: Handle NMI in hardware-grouping

Message ID 20240209031441.943012-13-weilin.wang@intel.com
State New
Headers
Series Perf stat metric grouping with hardware information |

Commit Message

Wang, Weilin Feb. 9, 2024, 3:14 a.m. UTC 
  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 mbox series

Patch

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;