1 files changed, 9 insertions, 6 deletions

diff --git a/tools/power/cpupower/utils/idle_monitor/mperf_monitor.c b/tools/power/cpupower/utils/idle_monitor/mperf_monitor.c
index 0a03573ebcc2..73b6b10cbdd2 100644
--- a/tools/power/cpupower/utils/idle_monitor/mperf_monitor.c
+++ b/tools/power/cpupower/utils/idle_monitor/mperf_monitor.c
@@ -33,7 +33,7 @@ static int mperf_get_count_percent(unsigned int self_id, double *percent,
 				   unsigned int cpu);
 static int mperf_get_count_freq(unsigned int id, unsigned long long *count,
 				unsigned int cpu);
-static struct timespec time_start, time_end;
+static struct timespec *time_start, *time_end;
 
 static cstate_t mperf_cstates[MPERF_CSTATE_COUNT] = {
 	{
@@ -174,7 +174,7 @@ static int mperf_get_count_percent(unsigned int id, double *percent,
 		dprint("%s: TSC Ref - mperf_diff: %llu, tsc_diff: %llu\n",
 		       mperf_cstates[id].name, mperf_diff, tsc_diff);
 	} else if (max_freq_mode == MAX_FREQ_SYSFS) {
-		timediff = max_frequency * timespec_diff_us(time_start, time_end);
+		timediff = max_frequency * timespec_diff_us(time_start[cpu], time_end[cpu]);
 		*percent = 100.0 * mperf_diff / timediff;
 		dprint("%s: MAXFREQ - mperf_diff: %llu, time_diff: %llu\n",
 		       mperf_cstates[id].name, mperf_diff, timediff);
@@ -207,7 +207,7 @@ static int mperf_get_count_freq(unsigned int id, unsigned long long *count,
 	if (max_freq_mode == MAX_FREQ_TSC_REF) {
 		/* Calculate max_freq from TSC count */
 		tsc_diff = tsc_at_measure_end[cpu] - tsc_at_measure_start[cpu];
-		time_diff = timespec_diff_us(time_start, time_end);
+		time_diff = timespec_diff_us(time_start[cpu], time_end[cpu]);
 		max_frequency = tsc_diff / time_diff;
 	}
 
@@ -226,9 +226,8 @@ static int mperf_start(void)
 {
 	int cpu;
 
-	clock_gettime(CLOCK_REALTIME, &time_start);
-
 	for (cpu = 0; cpu < cpu_count; cpu++) {
+		clock_gettime(CLOCK_REALTIME, &time_start[cpu]);
 		mperf_get_tsc(&tsc_at_measure_start[cpu]);
 		mperf_init_stats(cpu);
 	}
@@ -243,9 +242,9 @@ static int mperf_stop(void)
 	for (cpu = 0; cpu < cpu_count; cpu++) {
 		mperf_measure_stats(cpu);
 		mperf_get_tsc(&tsc_at_measure_end[cpu]);
+		clock_gettime(CLOCK_REALTIME, &time_end[cpu]);
 	}
 
-	clock_gettime(CLOCK_REALTIME, &time_end);
 	return 0;
 }
 
@@ -349,6 +348,8 @@ struct cpuidle_monitor *mperf_register(void)
 	aperf_current_count = calloc(cpu_count, sizeof(unsigned long long));
 	tsc_at_measure_start = calloc(cpu_count, sizeof(unsigned long long));
 	tsc_at_measure_end = calloc(cpu_count, sizeof(unsigned long long));
+	time_start = calloc(cpu_count, sizeof(struct timespec));
+	time_end = calloc(cpu_count, sizeof(struct timespec));
 	mperf_monitor.name_len = strlen(mperf_monitor.name);
 	return &mperf_monitor;
 }
@@ -361,6 +362,8 @@ void mperf_unregister(void)
 	free(aperf_current_count);
 	free(tsc_at_measure_start);
 	free(tsc_at_measure_end);
+	free(time_start);
+	free(time_end);
 	free(is_valid);
 }