Messages in this thread | | | Date | Wed, 24 Oct 2001 21:19:55 -0700 (PDT) | From | Linus Torvalds <> | Subject | Re: xmm2 - monitor Linux MM active/inactive lists graphically |
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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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