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

Alan Cox (alan@lxorguk.ukuu.org.uk)
Sat, 25 Aug 2001 22:33:36 +0100 (BST)

Messages sorted by: [ date ][ thread ][ subject ][ author ]
Next message: Samium Gromoff: "unrelated 2.4.x (x=0-9) sound"
Previous message: Alan Cox: "Re: unrelated 2.4.x (x=0-9) sound"

> 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.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

Next message: Samium Gromoff: "unrelated 2.4.x (x=0-9) sound"
Previous message: Alan Cox: "Re: unrelated 2.4.x (x=0-9) sound"