On 8/23/05, Andrew Morton <[email protected]> wrote:
> jerome lacoste <[email protected]> wrote:
> >
> > I am on a Dell Inspiron 8100 laptop with 512 M and 1G disk cache. I
> > usually have at least 4 big applications running simultaneously: a
> > Java IDE, firefox, firefox and X. All that under the Gnome desktop.
> >
> > I've sometimes seen periods where my laptop goes kind of nuts. While
> > the cpu is still at 0%, the workload goes to 100% (as shown in the
> > gnome process monitor) (I haven't checked in other means, e.g. top or
> > /proc info as my machine is unusable).
> >
> > But with my latest upgrade to 2.6.12 from 2.6.10, the hanging happens
> > much more often. It lasts for over 30 seconds.
> >
> > Could this hanging be related to swapping?
> > Are there any VM regression lately that would make a kernel less
> > appropriate for desktop use?
> > How can I investigate that further?
>
> 10-20 lines of `vmstat 1' output while it's happening would help.
Here it goes. Maybe just some bad swapping?
jerome@expresso> vmstat 1
procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
1 7 588164 7424 18612 106908 13 7 34 44 10 12 8 2 85 5
2 4 587996 6152 18624 108092 404 664 540 2892 1201 2631 70 9 0 21
0 12 588276 5160 18620 109188 664 1244 860 1244 1195 615 46 5 0 50
0 13 588140 4912 18628 109188 216 0 216 8 1156 245 0 0 0 100
0 17 588536 4892 18628 109972 132 576 132 576 1172 353 32 4 0 64
0 16 589096 5016 18628 110192 0 608 4 628 1169 247 7 2 0 91
0 16 589780 5636 18632 110136 0 716 0 808 1181 261 1 0 0 99
0 11 590272 5388 18532 111548 168 820 176 820 1192 457 52 5 0 43
0 11 590260 5140 18540 111584 0 320 36 332 1159 743 12 2 0 86
4 10 590232 9756 17456 109304 100 240 1064 420 1333 2297 47 16 0 38
1 6 590240 17440 16908 105680 72 80 460 2108 1266 2052 65 24 0 11
1 5 590004 13596 16988 109060 580 0 3380 0 1356 1743 13 8 0 79
0 6 589776 10372 17032 110936 968 0 1800 2924 1172 1057 19 4 0 77
0 7 589368 6544 17104 112468 1652 0 2496 100 1202 1109 8 4 0 88
1 4 589212 5676 17132 112232 488 0 1204 0 1160 1092 6 3 0 91
0 6 589032 12724 16772 107000 588 0 844 0 1339 1444 36 12 0 52
0 6 588664 8012 16792 108440 1448 0 2068 0 1637 1222 12 5 0 83
0 7 588252 6464 16460 108900 1840 4 2036 236 1629 1156 8 13 0 79
6 4 588040 13180 14696 107352 460 124 476 4608 1554 1644 70 9 0 21
1 3 587792 11812 14412 108348 848 0 1096 32 1404 2733 27 8 0 65
0 5 587464 9332 14444 109596 1380 0 1572 0 1159 1030 21 3 0 76
0 6 586976 8836 14244 110488 1556 24 1960 684 1210 1562 16 7 0 77
0 4 586684 6728 14288 111536 748 0 1068 344 1175 1216 12 3 0 85
0 9 586676 6232 14308 111908 96 0 336 48 1185 1544 7 2 0 91
0 6 586500 10860 13384 112364 792 0 1108 4516 1163 1588 24 8 0 68
0 5 586200 9024 13440 113272 1392 0 1528 12 1176 1019 8 4 0 88
1 6 585848 5596 13456 114888 1968 0 2044 52 1171 1118 11 5 0 84
0 6 585384 5968 12000 115972 1452 0 1484 0 1156 952 13 5 0 82
0 6 584984 5224 11880 115800 1916 0 2276 0 1167 780 4 3 0 93
0 6 584744 5148 9396 118836 1104 0 3352 0 1159 988 12 8 0 80
0 6 584560 5996 8664 119776 960 4 1492 4 1148 893 17 7 0 76
0 7 584204 5396 8536 120912 1048 0 1716 0 1186 1118 12 3 0 85
0 5 583964 5752 8036 121468 772 40 964 40 1154 5811 19 12 0 69
0 5 583608 5272 7532 121268 1500 0 1552 300 1156 784 3 2 0 95
0 5 583496 5840 7344 120712 396 0 948 8892 1175 1137 16 6 0 78
0 8 583448 5004 6016 124748 172 0 2616 4 1154 1027 9 6 0 85
0 9 583396 4880 4156 130880 96 20 4604 812 1176 1077 4 5 0 91
0 9 582780 4896 3836 130808 2012 0 2076 0 1184 1103 1 0 0 99
0 10 582520 5020 3792 130328 992 0 1120 4 1156 783 3 1 0 96
0 10 581924 4896 3308 130360 1528 0 1712 1756 1183 762 6 2 0 92
0 9 581916 5196 3256 130632 96 44 364 112 1159 1119 11 3 0 86
0 13 581704 4896 3264 130796 820 0 1672 3128 1171 1143 4 2 0 94
0 11 581704 6384 3088 129520 0 0 4 56 1159 706 4 6 0 90
0 12 581628 5640 3128 130148 328 0 716 612 1140 786 1 1 0 98
0 7 581492 4880 2336 135580 564 0 3684 92 1176 1788 16 7 0 77
> If lots of system time is being consumed then the next step is to generate
> a kernel profile - Documentation/basic_profiling.txt
System time below 10% according to top and what I see in this log.
Jerome
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