On Tue, Mar 13, 2007 at 02:05:11PM -0700, Jeremy Fitzhardinge wrote: > Andi Kleen wrote: > > It depends -- under heavy network load you can spend a long time > > just processing interrupts. > > Well, in that case you probably don't want to charge them to the process > which happens to be running at the time.
It's actually a good first-order approximation of the right thing to do, as it will generally correlate with the userspace process servicing that network load. If not (for instance, with routing loads), then you'd basically expect the charge to get spread around evenly in proportion to an application's CPU usage. The -rt kernel pushes most of the interrupt work off to threads, which of course follow the same scheduling and accounting rules as everything other thread. -- Mathematics is the supreme nostalgia of our time. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
