Re: [patch] voluntary-preempt-2.6.9-rc1-bk12-R6

[Alan Cox]

On Iau, 2004-09-09 at 23:45, William Lee Irwin III wrote:
> Something odd is going on, in part because I get *blistering* IO speeds
> running benchmarks like dbench, tiobench, et al on tmpfs with striped
> swap. In fact, IO speeds markedly faster than any other filesystem I've
> ever tried, by about 30MB/s (i.e. wirespeed, where others fall about
> 37.5% short of it). Virtual alignment issues do hurt, but the core
> allocation algorithm appears to be better than good, it's astounding.

Thats a very atypical load where you can expect to get long linear write
outs. The seek v write numbers for a disk nowdays have more in common
with a tape drive. Paging tends to be much much more random.

Alan

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