Messages in this thread | | | From | Andreas Schwab <> | Subject | Re: Possible spin-problem in nanosleep() | Date | Thu, 23 Jun 2005 14:33:52 +0200 |
| |
"Richard B. Johnson" <linux-os@analogic.com> writes:
> nanosleep() appears to have a problem. It may be just an > 'accounting' problem, but it isn't pretty. Code that used > to use usleep() to spend most of it's time sleeping, used > little or no CPU time as shown by `top`. The same code, > converted to nanosleep() appears to spend a lot of CPU > cycles spinning. The result is that `top` or similar > programs show lots of wasted CPU time.
usleep() is just a wrapper around nanosleep(). Are you sure you got the units right?
Andreas.
-- Andreas Schwab, SuSE Labs, schwab@suse.de SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5 "And now for something completely different." - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |