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SubjectRe: 2.5.59-mm8
At 11:31 PM 2/3/2003 -0800, Andrew Morton wrote:

>. Ingo's latest scheduler changes are here. I held off on that because it
> appeared that there was some interaction with the I/O scheduler. Whatever
> that was has gone away without any CPU scheduler changes, so...

Greetings,

The scheduler changes cause some odd behavior here when running make -j30
bzImage on my 128MB PIII/500 box.

It seems odd that I'm not getting the level of memory pressure I expect to
get. As you can see by the log, at times I _do_ briefly see 'proper'
memory pressure. I'm still trying to figure out if this is good or bad
behavior... all I know for _sure_ is that it's odd=reportable behavior ;-)

-Mike2.5.59virgin
time make -j30 bzImage
real 8m32.242s
user 7m36.300s
sys 0m45.279s

vmstat 15 (cs peaks are the ext3 sleep_on_buffer thing)
procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu----
b w swpd free buff cache si so bi bo in cs us sy id wa
0 0 0 26044 10004 78580 0 0 0 58 1010 15 0 0 100 0
31 1 0 4096 6860 43140 0 0 574 25 1110 298 62 13 11 14
31 0 12096 3872 356 6132 119 923 282 1049 1061 132 90 10 0 0
30 2 16444 9060 1308 13308 965 1122 1367 1184 1115 338 90 10 0 0
30 3 51964 8300 496 9272 314 2736 676 2784 1099 224 90 10 0 0
30 1 56036 4420 540 11112 455 967 592 991 1054 37051 83 17 0 0
11 20 63396 19356 484 7328 1693 930 1878 990 1105 327 92 8 0 0
30 2 11152 53140 644 14492 1656 0 1909 5 1100 487 89 11 0 0
26 4 31596 5208 528 5888 435 1818 548 1944 1128 159 91 7 0 2
30 1 30296 8808 612 12432 686 1082 1042 1092 1093 254 91 9 0 0
22 9 45044 7592 572 8860 1166 1509 1409 1567 1100 254 93 7 0 0
27 3 47228 8784 480 7644 749 1805 1027 1857 1101 240 91 9 0 0
18 13 69156 7976 384 8044 681 1973 1123 1999 1108 219 92 8 0 0
29 4 65872 3272 384 6636 1765 477 1989 506 1110 399 92 8 0 0
26 7 48752 21492 620 9796 1324 13 1606 47 1137 368 95 5 0 0
29 9 71664 17428 364 5444 554 2560 640 2597 1088 165 90 8 0 2
27 10 34064 70984 828 10344 1407 34 1769 57 1120 478 92 7 0 1
30 2 37936 4008 424 8164 366 459 575 531 1058 127 91 9 0 0
24 6 40388 4748 680 7484 589 1218 886 1291 1116 16452 90 10 0 0
17 14 29272 20172 752 11260 830 534 1220 592 1113 4176 89 11 0 0
31 0 37072 5736 1000 11988 312 1277 648 1335 1100 282 90 10 0 0
30 0 64908 5084 476 9212 225 2162 672 2201 1090 174 91 9 0 0
17 14 78096 10636 500 7868 991 1439 1194 1462 1087 208 92 8 0 0
19 11 72888 24556 736 7844 1906 246 2122 289 1111 18563 89 11 0 0
30 0 30504 4552 804 9668 1228 254 1437 298 1086 326 89 11 0 0
27 4 37568 4536 592 8408 355 1257 780 1334 1109 25522 87 13 0 0
27 3 56528 7668 916 7720 262 1996 557 2062 1099 27402 86 14 0 0
30 2 34592 5428 1208 15908 1752 0 2000 6 1107 401 90 10 0 0
30 2 38672 9408 788 10420 560 1597 862 1692 1107 254 91 9 0 0
28 2 53400 4312 456 6940 681 2205 949 2271 1101 165 90 10 0 0
20 13 58740 4968 480 6820 1054 1282 1454 1320 1110 261 91 9 0 0
16 14 46344 34272 736 9532 1585 490 1820 536 1109 384 94 6 0 0
14 15 34716 20292 692 8196 1205 518 1464 584 1113 372 91 9 0 0
9 0 9504 49672 832 14148 379 0 556 33 1052 183 93 7 0 0
1 0 3784 90932 1840 25600 164 0 541 6 1064 175 70 8 6 16
0 0 3252 88684 1904 29504 18 0 27 313 1014 14 10 1 86 3

cat /proc/vmstat

nr_dirty 9
nr_writeback 0
nr_pagecache 8411
nr_page_table_pages 82
nr_reverse_maps 3013
nr_mapped 494
nr_slab 1091
pgpgin 656537
pgpgout 567703
pswpin 106716
pswpout 130805
pgalloc 974323
pgfree 996216
pgactivate 47559
pgdeactivate 166306
pgfault 1678430
pgmajfault 26378
pgscan 1636171
pgrefill 612528
pgsteal 189050
kswapd_steal 172191
pageoutrun 559
allocstall 394
pgrotated 133033

2.5.59mm8
time make -j30 bzImage
real 8m17.891s
user 7m32.807s
sys 0m37.855s

vmstat 15
procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu----
b w swpd free buff cache si so bi bo in cs us sy id wa
0 0 0 27504 9840 77228 0 0 0 1 1005 16 0 0 100 0
32 0 0 8468 5620 24840 0 0 562 99 1241 267 66 12 7 15
28 3 2468 6064 1312 16564 0 119 93 155 1024 70 93 7 0 0
29 1 8772 3992 700 8032 57 637 216 780 1165 107 93 7 0 0
30 0 7380 42208 584 13112 205 297 472 328 1052 132 92 8 0 0
31 0 5392 41108 788 15864 50 0 145 27 1141 90 91 9 0 0
30 0 5028 29400 832 17112 13 0 48 26 1008 68 90 10 0 0
30 0 4700 6820 868 19644 16 0 51 45 1009 56 92 8 0 0
31 0 6556 19780 564 12612 194 606 418 684 1059 116 91 9 0 0
31 0 6876 6764 624 14804 20 91 144 126 1026 77 93 7 0 0
30 0 23504 26300 608 8764 594 1814 828 1886 1094 196 93 7 0 0
31 0 14052 21500 776 14092 269 0 379 11 1027 99 91 9 0 0
30 0 12996 21568 840 15208 85 0 130 30 1013 77 91 9 0 0
29 0 13452 5884 724 10592 95 434 202 497 1046 84 93 7 0 0
30 0 12780 5180 752 13180 166 295 380 340 1057 117 92 8 0 0
30 0 11200 26108 780 14800 360 255 618 281 1059 138 92 8 0 0
30 0 5984 19264 864 16308 34 0 83 11 1012 68 92 8 0 0
35 2 5576 22904 956 17516 9 0 52 69 1121 72 91 9 0 0
28 1 9656 5080 812 12796 41 239 157 302 1126 88 92 8 0 0
30 0 6548 7716 856 16208 16 135 121 179 1021 71 92 8 0 0
32 0 18812 17360 792 12348 167 1084 423 1173 1070 134 93 7 0 0
25 7 30716 2036 344 5428 174 1024 263 1094 1046 96 92 8 0 0
32 0 33512 24400 1124 12016 562 603 963 628 1096 239 92 8 0 0
19 12 59868 8328 348 4584 889 2033 1025 2096 1085 286 92 8 0 0
33 0 21860 51380 828 11412 1663 0 1958 28 1560 324 95 5 0 0
30 0 17056 4184 748 10264 195 411 367 462 1040 107 91 9 0 0
30 1 14364 11592 480 11772 317 366 675 428 1077 159 92 8 0 0
27 5 24524 12612 448 7028 331 1066 530 1133 1066 135 93 7 0 0
31 0 20788 4336 592 9960 526 479 831 532 1080 162 92 8 0 0
27 3 15992 30696 484 10704 495 467 755 499 1069 134 93 7 0 0
26 0 12836 11568 768 15608 133 0 229 31 1024 67 92 8 0 0
16 0 6900 27020 1432 16540 124 0 243 31 1033 89 94 6 0 0
2 0 3948 89740 1836 25836 150 0 452 54 1051 162 77 10 0 13
0 0 3444 88092 1960 29964 17 0 26 285 1010 19 19 1 75 6

cat /proc/vmstat

nr_dirty 45
nr_writeback 0
nr_pagecache 8242
nr_page_table_pages 82
nr_reverse_maps 2968
nr_mapped 443
nr_slab 1093
pgpgin 288727
pgpgout 228599
pswpin 29935
pswpout 46709
pgalloc 860920
pgfree 883000
pgactivate 29331
pgdeactivate 53165
pgfault 1581553
pgmajfault 8197
pgscan 725596
pgrefill 262595
pgsteal 80259
pginodesteal 0
kswapd_steal 77602
kswapd_inodesteal 6800
pageoutrun 296
allocstall 62
pgrotated 49144

2.5.59mm8 (reboot and run again)
time make -j30 bzImage
real 8m23.052s
user 7m32.998s
sys 0m38.119s

vmstat 15
procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu----
b w swpd free buff cache si so bi bo in cs us sy id wa
0 0 0 26280 9828 78788 0 0 0 3 1006 15 0 0 100 0
30 0 0 4064 6612 46368 0 0 597 109 1115 292 60 13 7 20
30 2 13212 24908 1060 8548 282 1173 618 1220 1087 176 92 8 0 0
31 0 9228 10800 2048 13732 169 0 362 108 1050 140 91 9 0 0
30 1 7048 33100 2120 14916 42 0 130 6 1074 89 91 9 0 0
32 1 5636 22728 2156 17752 53 0 99 48 1013 72 91 9 0 0
30 0 5588 6616 2196 18884 2 0 28 29 1006 57 91 9 0 0
30 1 5588 13556 2232 18932 0 0 17 53 1007 54 92 8 0 0
31 1 7320 29180 672 14788 105 420 252 478 1035 89 91 9 0 0
30 0 5804 9968 628 17320 11 0 64 31 1011 59 92 8 0 0
16 20 30060 11476 572 5896 217 1833 387 1915 1074 144 93 7 0 0
30 0 20300 9204 680 12936 247 2 549 25 1058 152 93 7 0 0
29 1 18764 4008 616 10952 272 460 378 493 1039 84 92 8 0 0
27 1 16612 27556 668 11040 203 155 421 191 1131 114 94 6 0 0
30 0 8896 5936 1012 17892 189 0 353 11 1038 117 91 9 0 0
30 0 15548 7284 432 9416 235 727 443 820 1058 101 93 7 0 0
30 0 14576 24192 696 12640 241 439 451 462 1055 132 93 7 0 0
30 0 12276 9504 844 15500 130 0 222 33 1021 80 92 8 0 0
30 0 15000 24360 684 11976 246 521 389 577 1047 104 93 7 0 0
29 2 12620 30664 780 16176 57 0 122 40 1015 74 91 9 0 0
27 4 16492 5096 672 10932 85 354 162 428 1029 81 92 8 0 0
34 0 12296 15128 820 15356 78 0 227 55 1176 118 92 8 0 0
30 1 13348 16020 688 11844 135 383 280 455 1183 104 92 8 0 0
27 3 13888 5152 516 9452 61 357 195 422 1034 74 92 8 0 0
30 0 16640 14528 596 13580 232 600 641 633 1124 166 92 8 0 0
19 12 56068 8624 524 6104 418 2797 557 2868 1085 187 91 7 0 2
30 1 36076 5260 804 12532 1101 0 1398 26 1089 228 92 8 0 0
24 7 31848 12852 340 8348 600 661 794 728 1077 137 92 8 0 0
30 1 21700 4584 732 10172 421 298 683 356 1079 175 91 9 0 0
26 4 43768 25020 528 7040 527 1980 783 2049 1108 260 90 7 0 3
27 0 17740 79336 968 12516 1355 0 1721 4 1113 449 79 9 0 12
17 4 14824 8372 600 9504 143 301 193 360 1028 65 92 8 0 0
6 0 7664 61484 860 14796 134 191 344 208 1041 96 96 4 0 0
1 0 3996 88244 1604 27716 85 0 370 55 1048 142 73 7 0 20
0 0 3468 89264 1780 28904 18 0 46 314 1017 18 2 1 88 9
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