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SubjectRe: xmm2 - monitor Linux MM active/inactive lists graphically

On 28 Oct 2001, Zlatko Calusic wrote:
>
> But, now I found something interesting, other two disk which are on
> the standard IDE controller work correctly (writing is at 17-22
> MB/sec). The disk which doesn't work well is on the HPT366 interface,
> so that may be our culprit. Now I got the idea to check patches
> retrogradely to see where it started behaving poorely.

Ok. That _is_ indeed a big clue.

Does the -ac patches have any hpt366-specific stuff? Although I suspect
you're right, and that it's just the driver (or controller itself) being
very very sensitive to some random alignment of stars, rather than any
real code itself.

> 0 2 0 13208 2924 516 450716 0 0 0 11808 179 113 0 6 93
> 0 1 0 13208 2656 524 450964 0 0 0 8432 174 86 1 6 93
> 0 1 0 13208 3676 532 449924 0 0 0 8432 174 91 1 4 95
> 0 1 0 13208 3400 540 450172 0 0 0 8432 231 343 1 4 94
> 0 2 0 13208 3520 548 450036 0 0 0 8440 180 179 2 5 93
> 0 1 0 20216 3544 728 456976 32 0 32 8432 175 94 0 4 95
> 0 2 0 20212 3280 728 457232 0 0 0 8440 174 88 0 5 95
> 0 2 0 20208 3032 728 457480 0 0 0 8364 174 84 1 4 95
> procs memory swap io system cpu
> r b w swpd free buff cache si so bi bo in cs us sy id
> 0 2 0 20208 3412 732 457092 0 0 0 6964 175 111 0 4 96
> 0 2 0 20208 3272 728 457224 0 0 0 1216 207 89 0 1 99
> 0 2 0 20208 3164 728 457352 0 0 0 1300 256 77 1 2 97
> 0 2 1 20208 2928 732 457604 0 0 0 1444 283 77 1 0 99
> 0 2 1 20208 2764 732 457732 0 0 0 1316 278 73 1 1 98

So it actually slows down to just 1.5MB/s at times? That's just
disgusting. I wonder what the driver is doing..

Linus

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