On Monday, September 14, 2015 03:58:09 PM Viresh Kumar wrote:
> On 14-09-15, 14:01, Shilpasri G Bhat wrote:
> > Log a 'critical' message if the max frequency is reduced below nominal
> > frequency. We already log 'info' message if the max frequency is
> > capped below turbo frequency. CPU should guarantee atleast nominal
> > frequency, but not turbo frequency in all system configurations and
> > environments. So report the pmax throttling with severity when Pmax is
> > dipped below nominal frequency.
> >
> > Signed-off-by: Shilpasri G Bhat <shilpa.b...@linux.vnet.ibm.com>
> > ---
> > Changes from v1:
> > - Modified the printk messages as per Viresh's suggestion.
> >
> > drivers/cpufreq/powernv-cpufreq.c | 10 ++++++++--
> > 1 file changed, 8 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/cpufreq/powernv-cpufreq.c
> > b/drivers/cpufreq/powernv-cpufreq.c
> > index 64994e1..cb50138 100644
> > --- a/drivers/cpufreq/powernv-cpufreq.c
> > +++ b/drivers/cpufreq/powernv-cpufreq.c
> > @@ -327,8 +327,14 @@ static void powernv_cpufreq_throttle_check(void *data)
> > if (chips[i].throttled)
> > goto next;
> > chips[i].throttled = true;
> > - pr_info("CPU %d on Chip %u has Pmax reduced to %d\n", cpu,
> > - chips[i].id, pmsr_pmax);
> > + if (pmsr_pmax < powernv_pstate_info.nominal)
> > + pr_crit("CPU %d on Chip %u has Pmax reduced below
> > nominal frequency (%d < %d)\n",
> > + cpu, chips[i].id, pmsr_pmax,
> > + powernv_pstate_info.nominal);
> > + else
> > + pr_info("CPU %d on Chip %u has Pmax reduced below turbo
> > frequency (%d < %d)\n",
> > + cpu, chips[i].id, pmsr_pmax,
> > + powernv_pstate_info.max);
> > } else if (chips[i].throttled) {
> > chips[i].throttled = false;
> > pr_info("CPU %d on Chip %u has Pmax restored to %d\n", cpu,
>
> Acked-by: Viresh Kumar <viresh.ku...@linaro.org>
Applied, thanks!
Rafael
_______________________________________________
Linuxppc-dev mailing list
Linuxppc-dev@lists.ozlabs.org
https://lists.ozlabs.org/listinfo/linuxppc-dev
