On 25 Oct 2001, Zlatko Calusic wrote:
>
> Sure. Output of 'vmstat 1' follows:
>
> 1 0 0 0 254552 5120 183476 0 0 12 24 178 438 2 37 60
> 0 1 0 0 137296 5232 297760 0 0 4 5284 195 440 3 43 54
> 1 0 0 0 126520 5244 308260 0 0 0 10588 215 230 0 3 96
> 0 2 0 0 117488 5252 317064 0 0 0 8796 176 139 1 3 96
> 0 2 0 0 107556 5264 326744 0 0 0 9704 174 78 0 3 97
This does not look like a VM issue at all - at this point you're already
getting only 10MB/s, yet the VM isn't even involved (there's definitely no
VM pressure here).
> Notice how there's planty of RAM. I'm writing sequentially to a file
> on the ext2 filesystem. The disk I'm writing on is a 7200rpm IDE,
> capable of ~ 22 MB/s and I'm still getting only ~ 9 MB/s. Weird!
Are you sure you haven't lost some DMA setting or something?
Linus
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This archive was generated by hypermail 2b29 : Wed Oct 31 2001 - 21:00:24 EST