Commit 8201a028 authored by Prarit Bhargava's avatar Prarit Bhargava Committed by Len Brown
Browse files

tools/power turbostat: Use sched_getcpu() instead of hardcoded cpu 0 



Disabling cpu 0 results in an error

turbostat: /sys/devices/system/cpu/cpu0/topology/thread_siblings: open failed: No such file or directory

Use sched_getcpu() instead of a hardcoded cpu 0 to get the max cpu number.

Signed-off-by: default avatarPrarit Bhargava <prarit@redhat.com>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent 9972d5d8

tools/power/x86/turbostat/turbostat.c

+10 −3
Original line number Diff line number Diff line
@@ -2865,12 +2865,19 @@ void re_initialize(void) 
void set_max_cpu_num(void)

{

	FILE *filep;

	int base_cpu;

	unsigned long dummy;

	char pathname[64];



	base_cpu = sched_getcpu();

	if (base_cpu < 0)

		err(1, "cannot find calling cpu ID");

	sprintf(pathname,

		"/sys/devices/system/cpu/cpu%d/topology/thread_siblings",

		base_cpu);



	filep = fopen_or_die(pathname, "r");

	topo.max_cpu_num = 0;

	filep = fopen_or_die(

			"/sys/devices/system/cpu/cpu0/topology/thread_siblings",

			"r");

	while (fscanf(filep, "%lx,", &dummy) == 1)

		topo.max_cpu_num += BITMASK_SIZE;

	fclose(filep);