Re: I/O very slow under 2.4 (device reading)

On Wed, Aug 08, 2001 at 11:12:45AM -0700, Linus Torvalds <[e-mail]> wrote:
> and the VM disagree about how/when to allocate memory. It's fixed by the patch
> I'll make a real pre-patch (2.4.8-pre7) with the full changeset, can you

after 10 gigs of reading:

   procs                      memory    swap          io     system         cpu
 r  b  w   swpd   free   buff  cache  si  so    bi    bo   in    cs  us  sy  id
 0  1  0      0   6828 372696  36340   0   0 48292     6  726  2188   0  25  75
 0  1  0      0   6880 370536  39352   0   0 33792     0  726  3725   1  37  62
 1  0  1      0   6880 370160  36340   0   0 25652    48  411  3374   1  82  17
 0  1  0      0   6628 370780  36288   0   0 44788     0  690  2071   1  31  68
 1  0  1      0   6832 372972  36264   0   0 41988     0  674  2933   0  42  57

the system still feels a bit sluggishly, but otherwise NO SIGN of that
problem (no io slowdown, no short freezes). just the usual "disks are
in-use" contentions.

cool ,)

> at a nice stable 21MB/s which is all my disk can deliver. 

you _should_ know that raw speed doesn't mean too much.

> [ Damn, maybe I should get one of those nice big 7200 rpm IBM drives ]

maybe noisier. and for some reason (I swear for ibm drives usually), they
keep getting uncorrectable media errors on all of my machines.. ;) still
they are the best ones available ;)

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