Re: REPORT: NFS and ReiserFS very high latencies, with low-latency

Frank Schaefer (frank.schafer@setuza.cz)
09 Apr 2002 09:57:57 +0200


On Sat, 2002-04-06 at 03:09, Ricardo Galli wrote:
> On 04/04/02 16:00, Alan Cox wrote:
> > Im curious how 2.4.19pre4-ac4 responds in that situation (even without low
> > latency added). If its the same then its pointing at the I/O subsystem
> > if not then it may be a good clue its a VM issue
>
> Done, with the same kernel config (after make oldconfig).
>
> Almost the same, the mouse froze three times, the second time about
> 9 seconds (checked against the wallclock), the others more or less 5.
>
> The freezes started 15 seconds after I started the copy, and 30 seconds later
> the system stabilised and become responsible again, i.e. no more mouse freezes.
>
>
> gallir@antoli:~$ vmstat -n 3
> 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 297364 20388 89280 0 0 182 448 811 1085 9 10 81
> 1 0 0 0 297348 20404 89280 0 0 0 8 237 592 1 0 99
> 3 0 1 0 274416 20516 112052 0 0 0 57 6527 3988 6 27 68
> 2 0 1 0 243872 20544 142552 0 0 0 0 9088 6519 11 39 50
> 3 0 0 0 215504 20772 171928 0 0 0 131 8771 6364 10 39 52
> 2 0 1 0 186184 20792 201228 0 0 0 0 8724 6213 9 44 47
> 2 0 2 0 170312 20904 216956 0 0 0 1932 5027 3461 4 23 74
> 3 0 2 0 153712 20912 234212 0 0 0 1976 5799 4169 3 27 70
> 0 1 3 0 149316 20992 238532 0 0 0 2472 2057 1390 10 9 81
> 1 1 3 0 149316 20992 238532 0 0 0 2395 947 134 0 2 98
> 1 1 2 0 149632 20992 238532 0 0 0 1263 956 131 0 2 98
> 2 0 1 0 137616 20992 250324 0 0 0 3952 4378 6786 55 29 16
> 0 1 4 0 118756 21068 269108 0 0 0 4599 6329 4717 51 38 11
> 2 0 1 0 116752 21068 271108 0 0 0 2404 1497 1279 11 6 83
> 4 0 1 0 100400 21068 287792 0 0 0 5504 5646 4838 65 34 1
> 3 0 1 0 82180 21152 305928 0 0 0 6709 6050 4852 40 38 23
> 1 0 1 0 56688 21152 331416 0 0 0 7893 7966 5743 51 46 4
> 2 0 1 0 29672 21244 358312 0 0 0 9064 8091 6011 15 39 46
> 3 0 1 0 6388 21360 381380 0 0 0 8908 8047 6327 9 41 50
> 0 0 1 0 6388 21364 381524 0 0 0 9045 8175 5633 16 41 44
> 1 1 1 0 6388 21572 381296 0 0 8 8467 7396 4827 21 34 45
> 1 0 1 0 6584 21740 380348 0 0 8 8976 7924 5136 39 45 16
> 1 0 1 0 6388 21852 380600 0 0 0 6744 6091 4715 9 32 59
> 2 0 1 0 6392 22032 380608 0 0 0 9119 8118 5584 9 37 53
> 4 0 1 0 6488 22032 380576 0 0 0 7936 7377 6188 6 40 55
> 1 0 0 0 6396 22164 380532 0 0 0 9752 8512 5092 2 43 55
> 2 0 1 0 6388 22188 380440 0 0 0 10069 8990 6080 4 44 52
> 3 0 1 0 6388 22332 380248 0 0 0 9165 8026 5708 12 44 44
> 2 0 1 0 6388 22444 378584 0 0 0 8087 7038 6582 16 39 46
> 2 0 1 0 6388 22444 378604 0 0 0 9472 8452 5168 7 41 53
> 3 0 1 0 6392 22640 378272 0 0 0 8777 7810 6431 10 40 50
> 0 0 1 0 6388 22660 378276 0 0 0 7083 6408 4646 3 32 64
> 2 0 0 0 6392 22756 378272 0 0 0 4407 4115 4094 3 23 74
> 1 0 0 0 6392 22808 378180 0 0 0 76 437 2004 6 1 93
>
>
> --
Hi,

kwave,kmail??? Isn't this KDE stuff?
IMHO you should report this to KDE.org.

Frank

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