O_DIRECT sockets? (was [RESEND] tuning linux for high network performance?)

On Wednesday 23 October 2002 16:59, Nivedita Singhvi wrote:

bert hubert wrote:

quoted

quoted

...adding the whole profile output - sorted by the first column this
time...

905182 total                                      0.4741
121426 csum_partial_copy_generic                474.3203
 93633 default_idle                             1800.6346
 74665 do_wp_page                               111.1086

Perhaps the 'copy' also entails grabbing the page from disk, leading to
inflated csum_partial_copy_generic stats?

I think this is strictly a copy from user space->kernel and vice versa.
This shouldnt include the disk access etc.

hm

I'm doing O_DIRECT read (from disk), so it needs to be user -> kernel, then.

any chance of using O_DIRECT to the socket?

-- 
Roy Sigurd Karlsbakk, Datavaktmester
ProntoTV AS - http://www.pronto.tv/
Tel: +47 9801 3356

Computers are like air conditioners.
They stop working when you open Windows.