Messages in this thread | | | Date | Thu, 11 Nov 2004 08:43:13 +0100 | From | "Prakash K. Cheemplavam" <> | Subject | Re: [2.6.10-rc1 and prev] System unuseable while writing to disk |
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Nick Piggin wrote: > Prakash K. Cheemplavam wrote: > >> 100 0 >> 0 0 0 774876 14532 136460 0 0 0 0 1180 436 1 >> 0 99 0 >> 1 1 0 571740 14732 333736 0 0 32 42628 1325 633 3 >> 43 52 2 >> 2 2 0 217812 15072 676648 0 0 0 45184 1523 1771 14 >> 78 0 8 >> 1 2 0 220436 15072 676648 0 0 0 49664 1582 1365 9 >> 6 0 85 >> 0 2 0 85460 15984 808012 0 0 164 73984 1487 1143 18 >> 32 0 49 >> 0 1 0 85716 15984 808140 0 0 0 29056 1493 1381 4 >> 6 0 90 >> 0 1 0 86100 15984 808140 0 0 0 40320 1420 1367 3 >> 2 0 95 >> 0 1 0 86100 15984 808140 0 0 0 44416 1386 693 0 >> 2 0 98 >> 0 1 0 86100 15984 808140 0 0 0 50304 1518 1413 5 >> 6 0 89 >> 0 1 0 86164 15984 808140 0 0 0 28544 1452 827 1 >> 2 0 97 >> 0 1 0 86292 15984 808140 0 0 0 35840 1386 809 1 >> 2 0 97 >> 0 1 0 86356 15984 808140 0 0 0 37376 1450 1373 3 >> 3 0 94 >> procs -----------memory---------- ---swap-- -----io---- --system-- >> ----cpu---- >> r b swpd free buff cache si so bi bo in cs us >> sy id wa >> 1 1 0 86484 15984 808140 0 0 0 42880 1752 2494 7 >> 6 0 87 >> 0 1 0 86484 15984 808140 0 0 0 31872 1608 2098 7 >> 4 0 89 >> 0 1 0 86484 15984 808140 0 0 0 45952 1530 795 1 >> 2 0 97 >> 0 1 0 86484 15984 808140 0 0 0 44288 1515 814 0 >> 3 0 97 >> 0 1 0 90580 15984 808140 0 0 0 29052 1471 1365 5 >> 5 0 90 >> 1 0 0 90148 16108 809356 0 0 976 2088 1383 1319 22 >> 11 0 67 >> 0 0 0 90148 16108 809360 0 0 4 16 1444 833 10 >> 5 84 1 >> 0 0 0 90148 16108 809360 0 0 0 0 1256 473 0 >> 0 100 0 >> 0 0 0 90148 16108 809360 0 0 0 0 1379 611 3 >> 1 96 0 >> 0 0 0 90148 16108 809360 0 0 0 0 1526 2439 16 >> 5 79 0 >> 0 0 0 90148 16164 809360 0 0 0 120 1563 1824 16 >> 4 80 0 >> >> >> Beginning and end the system is idle and then I start writing down the >> file. During that time thunderbird gets unusable. >> > > It looks like it may be a CPU scheduler issue: Nothing needs to > be read, no swap activity, enough free memory.
I see this behaviour with default scheduler in vanilla and with staircase...
> However, it also does look like there is a lot of CPU power free, > which makes the cpu scheduler less likely... Maybe interrupts are > using a lot of CPU time or latency, and that is being hidden from > CPU time accounting. > > I think Ingo did notice quite large latencies in disk interrupts, > although whether that would be enough to make thunderbird "unusable", > I'm not sure.
I tried preempt (inkl preempt "big kernel lock" in ck) which doesn't avoid above. (I don't rember whether it was better, though.)
bye,
Prakash [unhandled content-type:application/pgp-signature] | |