Re: NAPI and tg3

[Steffen Persvold]

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:[e-mail] |  http://www.scali.com
Tel: [phone] |   Olaf Helsets vei 6
Fax: [phone] |   N0621 Oslo, NORWAY