Messages in this thread | | | Subject | Re: select returning slow on RH 2.4.18-14 (RH 8.0) kernel. | From | Arjan van de Ven <> | Date | 13 Feb 2003 12:39:00 +0100 |
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On Thu, 2003-02-13 at 10:08, Ben Greear wrote: > I've been doing some testing with RH 8.0 on an Ezra 800Mhz > machine. > > Even when lightly loaded select() often returns 3-9 miliseconds slower > than the timeout would suggest. I know select is not guaranteed to > return with < 10ms accuracy, but with almost no load, shouldn't it > at least return with 1ms accuracy on average? no the kernel.org kernels will return in multiple-of-10ms quantities due to HZ having the value of 100. 2.4.18-14 (which is btw obsoleted by several security errata) has a HZ value of 512 so will return in shorter quantities, EXCEPT when you always try to wait exactly 10ms of course.... [unhandled content-type:application/pgp-signature] | |