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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@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
82e57cdce0
commit
d8f75b4c7f
1 changed files with 6 additions and 3 deletions
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@ -130,15 +130,18 @@ static struct cpuidle_monitor *cpuidle_register(void)
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{
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int num;
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char *tmp;
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int this_cpu;
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this_cpu = sched_getcpu();
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/* Assume idle state count is the same for all CPUs */
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cpuidle_sysfs_monitor.hw_states_num = cpuidle_state_count(0);
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cpuidle_sysfs_monitor.hw_states_num = cpuidle_state_count(this_cpu);
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if (cpuidle_sysfs_monitor.hw_states_num <= 0)
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return NULL;
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for (num = 0; num < cpuidle_sysfs_monitor.hw_states_num; num++) {
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tmp = cpuidle_state_name(0, num);
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tmp = cpuidle_state_name(this_cpu, num);
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if (tmp == NULL)
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continue;
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@ -146,7 +149,7 @@ static struct cpuidle_monitor *cpuidle_register(void)
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strncpy(cpuidle_cstates[num].name, tmp, CSTATE_NAME_LEN - 1);
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free(tmp);
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tmp = cpuidle_state_desc(0, num);
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tmp = cpuidle_state_desc(this_cpu, num);
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if (tmp == NULL)
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continue;
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strncpy(cpuidle_cstates[num].desc, tmp, CSTATE_DESC_LEN - 1);
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