Messages in this thread | | | Date | Mon, 6 Jan 2003 17:12:43 +0100 (CET) | From | Steffen Persvold <> | Subject | Re: NAPI and tg3 |
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On 6 Jan 2003, Alan Cox wrote:
> On Mon, 2003-01-06 at 15:00, Steffen Persvold wrote: > > I discovered that if I renice the ksoftirqd processes to level 0, the > > performance was actually better with the NAPI enabled driver compared to > > the one without (as was intended my NAPI IIRC). With the default nice > > level (19) on the ksoftirqd processes, the performance on multithreaded > > programs was pretty lousy with the NAPI enabled driver. > > > > Any reason why the ksoftirqd shouldn't be nice level 0 by default ? Is > > this already fixed in 2.4.21-pre series ? > > Hack the code to only fall back to ksoftirqd when there are say 10 rather > than 1 pending event and it should perform even better but still handle > overload properly >
Ok I can try that, but what about the nice level of ksoftirqd ? Any specific reason for it beeing 19 (lowest priority) and not 0 (equally to most other processes in the system) ?
Regards, -- Steffen Persvold | Scali AS mailto:sp@scali.com | http://www.scali.com Tel: (+47) 2262 8950 | Olaf Helsets vei 6 Fax: (+47) 2262 8951 | N0621 Oslo, NORWAY
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