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cpupower : Fix cpupower working when cpu0 is offline 

[ Upstream commit dbdc468f35 ]

cpuidle_monitor used to assume that cpu0 is always online which is not
a valid assumption on POWER machines. This patch fixes this by getting
the cpu on which the current thread is running, instead of always using
cpu0 for monitoring which may not be online.

Signed-off-by: Abhishek Goel <huntbag@linux.vnet.ibm.com>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
pull/10/head
Abhishek Goel 2017-11-15 14:10:02 +05:30 committed by Greg Kroah-Hartman
parent 1d285c0440
commit f1881befac
1 changed files with 6 additions and 3 deletions
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9
tools/power/cpupower/utils/idle_monitor/cpuidle_sysfs.c
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@ -130,15 +130,18 @@ static struct cpuidle_monitor *cpuidle_register(void)
{
int num;
char *tmp;
int this_cpu;
this_cpu = sched_getcpu();
/* Assume idle state count is the same for all CPUs */
cpuidle_sysfs_monitor.hw_states_num = cpuidle_state_count(0);
cpuidle_sysfs_monitor.hw_states_num = cpuidle_state_count(this_cpu);
if (cpuidle_sysfs_monitor.hw_states_num <= 0)
return NULL;
for (num = 0; num < cpuidle_sysfs_monitor.hw_states_num; num++) {
tmp = cpuidle_state_name(0, num);
tmp = cpuidle_state_name(this_cpu, num);
if (tmp == NULL)
continue;
@ -146,7 +149,7 @@ static struct cpuidle_monitor *cpuidle_register(void)
strncpy(cpuidle_cstates[num].name, tmp, CSTATE_NAME_LEN - 1);
free(tmp);
tmp = cpuidle_state_desc(0, num);
tmp = cpuidle_state_desc(this_cpu, num);
if (tmp == NULL)
continue;
strncpy(cpuidle_cstates[num].desc, tmp, CSTATE_DESC_LEN - 1);