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SubjectRe: [PATCH *] rmap VM 11c
This looks a little like my problem...

See http://karlsbakk.net/dev/kernel/vm-fsckup.txt

On Thu, 17 Jan 2002, Adam Kropelin wrote:

> Rik van Riel <riel@conectiva.com.br>:
> > For this release, IO tests are very much welcome ...
>
> Results from a run of my large FTP transfer test on this new release are...
> interesting.
>
> Overall time shows an improvement (6:28), though not enough of one to take the
> lead over 2.4.13-ac7.
>
> More interesting, perhaps, is the vmstat output, which shows this at first:
>
> procs memory swap io system cpu
> r b w swpd free buff cache si so bi bo in cs us sy id
> 0 0 0 0 47816 2992 84236 0 0 10 0 4462 174 1 33 66
> 1 0 0 0 41704 3004 89320 0 0 10 0 4322 167 0 33 67
> 0 1 0 0 36004 3012 94064 0 0 9 877 4030 163 1 30 69
> 0 1 1 0 33536 3016 96112 0 0 4 1616 1724 62 0 18 82
> 0 1 2 0 31068 3020 98160 0 0 4 2048 1729 52 1 15 83
> 0 1 1 0 28608 3024 100208 0 0 4 2064 1735 56 1 16 82
> 0 1 1 0 26144 3028 102256 0 0 4 2048 1735 50 0 16 84
> 0 1 1 0 23684 3032 104304 0 0 5 2048 1713 45 1 15 84
> 0 1 1 0 21216 3036 106352 0 0 3 2064 1723 52 1 14 85
> 1 0 2 0 18728 3040 108420 0 0 5 2048 1750 59 0 17 82
> 0 1 1 0 16292 3044 110448 0 0 3 2064 1722 60 0 15 84
> 1 0 1 0 13824 3048 112572 0 0 5 2032 1800 61 0 17 83
> 1 0 1 0 11696 3052 114548 0 0 4 2528 1658 47 0 14 86
> 1 0 1 0 9232 3056 116596 0 0 4 2048 1735 51 1 13 86
> 0 1 2 0 6808 3060 118640 0 0 3 1584 1729 84 0 16 84
>
> (i.e., nice steady writeout reminiscent of -ac)
>
> ...but after about 20 seconds, behavior degrades again:
>
> procs memory swap io system cpu
> r b w swpd free buff cache si so bi bo in cs us sy id
> 0 1 1 0 1500 3124 123268 0 0 0 3788 534 20 0 8 92
> 0 1 1 0 1500 3124 123268 0 0 0 0 107 12 0 0 100
> 0 1 1 0 1500 3124 123268 0 0 0 0 123 10 0 0 100
> 0 1 1 0 1500 3124 123268 0 0 0 3666 123 12 0 2 97
> 0 1 1 0 1500 3124 123268 0 0 1 259 109 12 0 8 92
> 1 0 0 0 1404 3124 123360 0 0 2 0 1078 28 0 7 92
> 1 0 0 0 1404 3136 123444 0 0 11 0 4560 178 0 39 61
> 1 0 0 0 1404 3148 123448 0 0 10 0 4620 175 1 34 64
> 0 0 0 0 1312 3156 123568 0 0 11 0 4276 181 0 36 64
> 0 0 0 0 1404 3168 123492 0 0 10 0 4330 185 1 30 68
> 0 1 1 0 1404 3172 123488 0 0 4 6864 1742 69 0 17 83
> 0 1 1 0 1408 3172 123488 0 0 0 0 111 12 0 0 99
> 0 1 1 0 1408 3172 123488 0 0 0 0 126 8 0 0 100
> 0 1 1 0 1404 3172 123480 0 0 0 7456 518 18 0 10 90
> 0 1 1 0 1404 3172 123480 0 0 0 0 112 10 0 0 100
> 0 1 1 0 1404 3172 123480 0 0 0 0 123 9 0 0 100
> 0 1 1 0 1404 3172 123476 0 0 1 7222 120 16 0 5 95
> 0 1 1 0 1404 3172 123476 0 0 0 0 106 8 0 0 100
> 0 1 1 0 1524 3172 123352 0 0 0 3790 519 18 0 8 92
> 0 1 1 0 1524 3172 123352 0 0 0 0 113 8 0 0 100
> 0 1 1 0 1524 3172 123352 0 0 0 0 125 8 0 0 100
>
> Previous tests showed fluctuating bo values from the start; this is the first
> time I've seen them steady, so something in the patch definitely is showing
> through here.
>
> I've a couple more tests to run, such as combining -rmap11c with cpqarray and
> eepro driver updates from -ac. I'll keep you posted.
>
> --Adam
>
>
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--
Roy Sigurd Karlsbakk, MCSE, MCNE, CLS, LCA

Computers are like air conditioners.
They stop working when you open Windows.

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