Messages in this thread | | | Date | Mon, 14 Nov 2022 12:42:52 +0100 | From | Frederic Weisbecker <> | Subject | Re: [PATCH v7 2/6] sched: Add helper kstat_cpu_softirqs_sum() |
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On Fri, Nov 11, 2022 at 09:07:05PM +0800, Zhen Lei wrote: > Similar to kstat_cpu_irqs_sum(), it counts the sum of all software > interrupts on a specified CPU. > > Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com> > --- > include/linux/kernel_stat.h | 11 +++++++++++ > 1 file changed, 11 insertions(+) > > diff --git a/include/linux/kernel_stat.h b/include/linux/kernel_stat.h > index 90e2fdc17d79ff8..898076e173a928a 100644 > --- a/include/linux/kernel_stat.h > +++ b/include/linux/kernel_stat.h > @@ -67,6 +67,17 @@ static inline unsigned int kstat_softirqs_cpu(unsigned int irq, int cpu) > return kstat_cpu(cpu).softirqs[irq]; > } > > +static inline unsigned int kstat_cpu_softirqs_sum(int cpu) > +{ > + int i; > + unsigned int sum = 0; > + > + for (i = 0; i < NR_SOFTIRQS; i++) > + sum += kstat_softirqs_cpu(i, cpu);
This should return a u64 or at least an unsigned long so that high numbers of CPUs don't overflow easily.
Thanks.
> + > + return sum; > +} > + > /* > * Number of interrupts per specific IRQ source, since bootup > */ > -- > 2.25.1 >
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