Re: [resent PATCH] Re: very slow parallel read performance

Alan Cox
2001-08-25T21:31:48Z

> exactly this is a point: my disk can do 5mb/s with almost random seeks,
> and linux indeed reads 5mb/s from it. but the userpsace process doing
> read() only ever sees 2mb/s because the kernel throes away all the nice
> pages.

Which means the VM in the relevant kernel is probably crap or your working
set exceeds ram.