On Fri, 28 Nov 2014 19:23:54 +0100 Frederic Weisbecker <fweis...@gmail.com> wrote:
> The irqtime is accounted is nsecs and stored in > cpu_irq_time.hardirq_time and cpu_irq_time.softirq_time. Once the > accumulated amount reaches a new jiffy, this one gets accounted to the > kcpustat. > > This was necessary when kcpustat was stored in cputime_t, which could at > worst have a jiffies granularity. But now kcpustat is stored in nsecs > so this whole discretization game with temporary irqtime storage has > become unnecessary. > > We can now directly account the irqtime to the kcpustat. Isn't the issue here that two different approaches to cputime accounting get mixed here? On the one hand a cputime_t based on jiffies and on the other CONFIG_IRQ_TIME_ACCOUNTING which uses sched_clock_cpu() to create the accounting deltas. -- blue skies, Martin. "Reality continues to ruin my life." - Calvin. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
