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| Started by | Gautham R Shenoy <ego@linux.vnet.ibm.com> |
|---|---|
| First post | 2015-07-23 07:20 +0200 |
| Last post | 2015-07-23 07:20 +0200 |
| Articles | 1 — 1 participant |
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Re: [PATCH] cpupower: Do not change the frequency of offline cpu Gautham R Shenoy <ego@linux.vnet.ibm.com> - 2015-07-23 07:20 +0200
| From | Gautham R Shenoy <ego@linux.vnet.ibm.com> |
|---|---|
| Date | 2015-07-23 07:20 +0200 |
| Subject | Re: [PATCH] cpupower: Do not change the frequency of offline cpu |
| Message-ID | <pPh5g-5sT-9@gated-at.bofh.it> |
Hi Shilpa,
This looks good.
Reviewed-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
On Wed, Jul 22, 2015 at 01:50:49PM +0530, Shilpasri G Bhat wrote:
> Check if the cpu is online before changing the frequency/governor of
> the cpu.
>
> Signed-off-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>
> ---
> tools/power/cpupower/utils/cpufreq-set.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/tools/power/cpupower/utils/cpufreq-set.c b/tools/power/cpupower/utils/cpufreq-set.c
> index f656e58..4e21357 100644
> --- a/tools/power/cpupower/utils/cpufreq-set.c
> +++ b/tools/power/cpupower/utils/cpufreq-set.c
> @@ -17,6 +17,7 @@
>
> #include "cpufreq.h"
> #include "helpers/helpers.h"
> +#include "helpers/sysfs.h"
>
> #define NORM_FREQ_LEN 32
>
> @@ -318,6 +319,9 @@ int cmd_freq_set(int argc, char **argv)
> cpufreq_cpu_exists(cpu))
> continue;
>
> + if (sysfs_is_cpu_online(cpu) != 1)
> + continue;
> +
> printf(_("Setting cpu: %d\n"), cpu);
> ret = do_one_cpu(cpu, &new_pol, freq, policychange);
> if (ret) {
> --
> 1.9.3
>
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