Commit 5f179d8b authored by Jaylyn Ren's avatar Jaylyn Ren Committed by Tomasz Zawadzki
Browse files

perf: Fix an error about perf cores usage 



There is an error when collecting the cpu usage data in perf.c.

The cpu busy data exceeds 100% when running perf tool with mutli-cores.

Signed-off-by: default avatarJaylyn Ren <jaylyn.ren@arm.com>
Change-Id: I9a00f86a51fb52e115c37199aee6f849b235d868
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/7431


Tested-by: default avatarSPDK CI Jenkins <sys_sgci@intel.com>
Community-CI: Mellanox Build Bot
Reviewed-by: default avatarAleksey Marchuk <alexeymar@mellanox.com>
Reviewed-by: default avatarBen Walker <benjamin.walker@intel.com>
parent 8651ef29

examples/nvme/perf/perf.c

+1 −1
Original line number Diff line number Diff line
@@ -1527,13 +1527,13 @@ print_periodic_performance(bool warmup) 
		if (g_monitor_perf_cores) {

			core_busy_tsc += busy_tsc;

			core_idle_tsc += idle_tsc;

			core_busy_perc += (double)core_busy_tsc / (core_idle_tsc + core_busy_tsc) * 100;

		}

	}

	mb_this_second = (double)io_this_second * g_io_size_bytes / (1024 * 1024);



	printf("%s%9ju IOPS, %8.2f MiB/s", warmup ? "[warmup] " : "", io_this_second, mb_this_second);

	if (g_monitor_perf_cores) {

		core_busy_perc = (double)core_busy_tsc / (core_idle_tsc + core_busy_tsc) * 100;

		printf("%3d Core(s): %6.2f%% Busy", g_num_workers, core_busy_perc);

	}

	printf("\r");