Commit 864dc09e authored by Srinivas Pandruvada's avatar Srinivas Pandruvada Committed by Andy Shevchenko

tools/power/x86/intel-speed-select: Max CPU count calculation when CPU0 is offline

Currently /sys/devices/system/cpu/cpu0/topology/thread_siblings is used to
get the max CPU count. But when CPU0 is offline, then this file will be
absent.

So add processing so that we can get count from any first CPU in the
system. which is online.
Signed-off-by: default avatarSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
parent 69669198
......@@ -316,10 +316,24 @@ static void set_max_cpu_num(void)
{
FILE *filep;
unsigned long dummy;
int i;
topo_max_cpus = 0;
filep = fopen_or_exit(
"/sys/devices/system/cpu/cpu0/topology/thread_siblings", "r");
for (i = 0; i < 256; ++i) {
char path[256];
snprintf(path, sizeof(path),
"/sys/devices/system/cpu/cpu%d/topology/thread_siblings", i);
filep = fopen(path, "r");
if (filep)
break;
}
if (!filep) {
fprintf(stderr, "Can't get max cpu number\n");
exit(0);
}
while (fscanf(filep, "%lx,", &dummy) == 1)
topo_max_cpus += BITMASK_SIZE;
fclose(filep);
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment