Re: Possible spin-problem in nanosleep()

From: Andreas Schwab
Date: Thu Jun 23 2005 - 07:37:35 EST

"Richard B. Johnson" <linux-os@xxxxxxxxxxxx> 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 Schwab, SuSE Labs, schwab@xxxxxxx
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
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