Re: 2.6.0-test8/test9 io scheduler needs tuning?

From: Michael Frank
Date: Tue Oct 28 2003 - 23:58:54 EST

On Wednesday 29 October 2003 10:40, Nick Piggin wrote:
>
> Dave Olien wrote:
>
> >Yes, it seems Nick's latest patch from 10/27, has helped reaim
> >considerably.
> >
> >The dbt2 workload still has a problem though. Mary ran this patch today,
> >with deadline and with as-iosched:
> >
> >2.6.0-test9, elevator=deadline 1644 NOTPM
> >2.6.0-test9, unpatched as-iosched 977 NOTPM
> >2.6.0-test9, as-iosched with as-fix.patch 980 NOTPM
> >
> >Higher NOTPM numbers are better.
> >
>
> OK, how does 2.6.0-test5 go on these tests?
>

-test5 looks good with 4 dd loops 4K x 5000. The disk is busy as expected.

procs memory swap io system cpu
r b w swpd free buff cache si so bi bo in cs us sy id
3 2 3 0 114488 11816 165872 0 0 0 39352 1116 1047 34 66 0
0 4 1 0 114616 11848 165872 0 0 0 932 1162 1495 49 51 0
0 4 2 0 114848 11852 165872 0 0 0 25300 1283 11355 59 41 0
0 4 1 0 115168 11860 165872 0 0 0 14364 1328 1286 79 21 0
1 4 2 0 114464 11912 165872 0 0 4 12196 1424 1488 38 62 0
0 4 1 0 113968 11912 150412 0 0 0 31460 1316 1308 72 28 0
0 4 2 0 93424 11936 165872 0 0 0 25148 1249 1374 61 39 0
6 2 3 0 118704 11936 140748 0 0 0 19972 1156 1061 82 18 0
4 4 3 0 102128 11960 157672 0 0 0 16324 1217 655 43 57 0
0 4 2 0 93568 11980 165872 0 0 0 35948 1230 1199 50 50 0
0 4 4 0 95680 12056 148552 0 0 4 28840 1148 1443 42 58 0
0 4 2 0 75456 12068 165872 0 0 0 23936 1145 1354 61 39 0
1 3 4 0 95488 12076 146204 0 0 0 30080 1197 1410 60 40 0
0 4 4 0 75904 12120 165872 0 0 0 23476 1171 1338 48 52 0
0 4 4 0 76032 12120 165872 0 0 0 9312 1259 1169 83 17 0
1 4 4 0 76160 12120 165872 0 0 0 9008 1282 1324 83 17 0
5 2 4 0 84608 12120 150592 0 0 0 17116 1357 892 42 58 0
procs memory swap io system cpu
r b w swpd free buff cache si so bi bo in cs us sy id
4 4 4 0 69312 12152 165872 0 0 0 12016 1437 892 39 61 0
0 4 4 0 68608 12152 165872 0 0 0 45376 1302 1236 67 33 0
1 4 4 0 71936 12160 155532 0 0 0 21628 1127 1233 72 28 0
4 0 0 0 128000 12176 100984 0 0 0 68 1160 1790 67 33 0
4 0 0 0 98752 12200 129524 0 0 0 31108 1216 1493 53 47 0
2 2 1 0 114048 12236 111252 0 0 0 49072 1103 1540 44 56 0
6 1 1 0 103424 12264 122360 0 0 0 22928 1089 1078 39 61 0
0 4 4 0 58752 12288 165872 0 0 0 20816 1208 1014 42 58 0
0 4 4 0 65216 12288 157616 0 0 0 12664 1279 1199 83 17 0
0 4 4 0 70016 12288 151924 0 0 0 10912 1466 1535 78 22 0
2 4 4 0 54144 12320 165872 0 0 0 33336 1367 1505 39 61 0
0 4 1 0 63296 12344 156824 0 0 0 35460 1239 1142 34 66 0
0 4 1 0 68480 12344 146736 0 0 0 12992 1087 1336 79 21 0
0 4 1 0 48192 12356 165872 0 0 0 27260 1226 1303 63 38 0
4 3 1 0 48448 12404 165872 0 0 0 20204 1118 1224 41 59 0
0 4 2 0 47872 12444 165872 0 0 0 15636 1260 1036 29 71 0
0 4 1 0 47360 12444 165872 0 0 0 39544 1550 1137 73 27 0
procs memory swap io system cpu
r b w swpd free buff cache si so bi bo in cs us sy id
1 4 2 0 66176 12444 131464 0 0 0 7744 1154 1235 83 17 0
0 4 2 0 15248 12468 158968 0 0 0 38432 1330 1354 42 58 0
5 0 1 0 21096 12500 153784 0 0 0 10516 1173 1391 66 34 0
0 4 2 0 8288 12524 165872 0 0 0 43688 1167 1205 56 44 0
6 2 1 0 15208 12524 158452 0 0 0 24712 1150 1052 77 23 0
5 4 2 0 20896 12544 153536 0 0 0 23460 1109 2717 24 76 0
3 1 3 0 9088 12568 148068 0 0 0 10012 1182 1287 45 55 0
0 4 3 0 4736 11600 152360 0 0 76 41456 1290 1353 59 41 0
2 2 3 0 4884 11632 152228 0 0 0 21648 1116 1253 61 39 0
0 4 3 0 5096 11656 152360 0 0 0 13516 1180 1511 61 39 0
1 3 3 0 5192 11656 152360 0 0 0 30244 1187 1303 58 42 0
0 4 3 0 18728 11656 134228 0 0 0 13896 1188 1331 79 21 0
0 4 3 0 4720 11464 148240 0 0 0 25356 1363 1452 58 42 0
9 0 1 0 44384 11504 109656 0 0 0 1168 1202 493 37 63 0
0 4 3 0 4336 11564 148240 0 0 0 21092 1150 1169 38 62 0
0 4 1 0 4264 11564 137308 0 0 0 25324 1372 1298 76 24 0
1 3 3 0 6832 9220 119764 0 0 4 22976 1333 1546 48 52 0
procs memory swap io system cpu
r b w swpd free buff cache si so bi bo in cs us sy id
2 3 4 0 9904 9244 108500 0 0 12 45416 1280 1561 53 47 0
0 4 2 0 13360 8880 111916 0 0 0 22484 1171 1421 58 42 0
1 3 4 0 14704 8928 116296 0 0 0 6052 1103 1480 48 52 0
0 4 1 0 15972 8924 114916 0 0 0 59612 1182 763 52 48 0
1 4 2 0 4772 8948 126216 0 0 0 20096 1092 1297 59 41 0
7 1 2 0 11684 8964 119392 0 0 0 9436 1113 1314 33 67 0
0 4 3 0 5096 8984 126216 0 0 0 17428 1300 963 54 46 0
1 4 3 0 4776 8984 126216 0 0 0 19224 1219 1356 79 21 0
0 4 3 0 4972 8984 126216 0 0 0 14704 1288 1173 83 17 0
0 4 3 0 26868 9020 94336 0 0 0 20624 1277 1462 55 45 0
0 4 3 0 5296 9036 126216 0 0 0 9892 1487 1434 54 46 0
0 4 3 0 4976 9036 126216 0 0 0 32264 1266 1285 75 25 0
0 4 1 0 5360 9036 126216 0 0 0 17008 1186 1358 80 20 0
6 2 1 0 42800 9064 89960 0 0 0 14196 1267 559 35 65 0
0 4 1 0 26224 9092 106216 0 0 0 20112 1178 1187 56 44 0
0 4 2 0 45940 9128 86220 0 0 0 40196 1179 1425 42 58 0
0 4 4 0 9840 8908 118928 0 0 0 28412 1195 9048 36 64 0
procs memory swap io system cpu
r b w swpd free buff cache si so bi bo in cs us sy id
1 4 3 0 4432 8940 126160 0 0 0 46816 1290 1413 53 47 0
1 4 4 0 4624 8944 126112 0 0 0 5276 1224 1175 83 17 0
8 0 4 0 5144 8752 126068 0 0 0 2352 1258 1171 42 58 0
2 4 4 0 4828 8752 126068 0 0 0 33200 1308 975 70 30 0
0 4 1 0 5212 8760 126068 0 0 0 24304 1270 775 72 28 0
1 4 4 0 25316 8840 105672 0 0 0 29824 1209 1467 35 65 0
1 4 5 0 4964 8848 126068 0 0 0 14264 1271 1438 57 43 0
1 4 5 0 4900 8848 126068 0 0 0 31776 1197 1246 73 27 0
1 4 1 0 4964 8856 126068 0 0 0 16076 1173 1328 83 17 0
9 1 5 0 4260 8892 126068 0 0 0 23992 1252 2280 37 63 0
2 4 6 0 5284 8916 126068 0 0 0 12236 1250 846 40 60 0
1 4 6 0 5412 8916 126068 0 0 0 26204 1403 1263 75 25 0
2 3 6 0 11876 8916 119992 0 0 0 18996 1308 1281 60 40 0
4 1 3 0 36132 8960 95756 0 0 0 22516 1194 1658 49 51 0
1 4 6 0 4900 8988 126068 0 0 0 22708 1266 1446 44 56 0
4 4 4 0 9380 8988 115648 0 0 0 21944 1337 1489 72 28 0
6 2 4 0 4840 8988 126088 0 0 20 22176 1259 997 75 25 0
procs memory swap io system cpu
r b w swpd free buff cache si so bi bo in cs us sy id
1 4 1 0 5096 8992 126088 0 0 0 12632 1269 1905 90 10 0
0 4 1 0 23592 9000 107920 0 0 0 18484 1397 1605 74 26 0
1 3 3 0 5224 9072 126088 0 0 4 20816 1464 1603 39 61 0

Back to -test9

Also used only noop. Does not make much of a difference as i do not wish to claim it is better ;)

Request queue size above 128 does not make a significant difference either.

I'd say going down to 4 still works about as well in terms of total throughput.

And it is still bloody impossible to make the disk LED stay on.

I'll be back with "measurements" by weekend.

Regards
Michael


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