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SubjectRe: 2.5.31 kmap_atomic copy_*_user benefits
On Thu, Aug 15, 2002 at 04:21:26PM -0700, William Lee Irwin III wrote:
> In the follow-ups I'll include oprofile numbers for each and vmstat logs.

vmstat log before:

Script started on Thu Aug 15 18:06:12 2002
$ vmstat 10
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 16030500 0 17152 0 0 6 1 64 3 0 0 99
0 0 0 0 15958620 0 18220 0 0 106 0 1011 60 0 1 99
0 512 1 0 15653616 0 262312 0 0 48 158 1060 786 0 43 57
129 383 1 0 15089556 0 808580 0 0 8 44 1084 410 0 93 6
149 363 0 0 14426392 0 1451152 0 0 27 2 1194 679 0 98 2
401 111 1 0 13826876 0 2027240 0 0 26 357 1086 690 0 99 0
493 19 1 0 13209856 0 2631808 0 0 13 871 1132 789 0 100 0
411 101 1 0 12637416 0 3192400 0 0 32 0 1008 1121 0 100 0
421 91 1 0 11984456 0 3831656 0 0 19 0 1173 1202 0 100 0
0 512 1 0 11692000 0 4114760 0 0 29 1664 1059 618 0 52 48
507 5 1 0 11133820 0 4660992 0 0 19 2908 1165 646 0 96 3
460 52 1 0 10588860 0 5195184 0 0 54 2638 1110 1017 0 100 0
511 1 1 0 9983548 0 5787468 0 0 12 3038 1254 1203 0 100 0
456 56 1 0 9454660 0 6305104 0 0 46 2752 1115 1041 0 100 0
512 0 1 0 8850200 0 6896792 0 0 10 3439 1330 1002 0 100 0
475 37 1 0 8340844 0 7395540 0 0 30 2836 1115 914 0 100 0
501 11 1 0 7884784 0 7841860 0 0 44 2962 1119 663 1 99 0
511 1 1 0 7467560 0 8250548 0 0 12 2878 1110 448 1 99 0
504 8 1 0 7101380 0 8609880 0 0 51 2746 1122 333 1 99 0
49 463 1 0 6775144 0 8927748 0 0 17 2854 1119 293 1 99 0
1 511 1 0 6743308 0 8957548 0 0 1 2863 1106 26 0 9 91
procs memory swap io system cpu
r b w swpd free buff cache si so bi bo in cs us sy id
0 512 1 0 6734056 0 8966760 0 0 0 2956 1104 9 0 2 98
1 511 1 0 6726252 0 8974336 0 0 0 2942 1103 8 0 2 98
0 512 1 0 6718468 0 8981972 0 0 0 2906 1101 8 0 2 98
0 512 1 0 6709704 0 8990412 0 0 0 2988 1105 9 0 2 98
0 512 1 0 6701000 0 8999160 0 0 0 2834 1101 8 0 2 98
1 511 1 0 6692044 0 9007868 0 0 0 2845 1101 8 0 1 98
0 512 1 0 6681136 0 9018320 0 0 0 2917 1101 8 0 2 98
0 512 1 0 6672436 0 9027192 0 0 0 2862 1102 8 0 2 98
1 511 1 0 6663200 0 9035896 0 0 0 2930 1104 9 0 2 98
0 512 1 0 6654712 0 9044048 0 0 0 2904 1102 9 0 1 99
1 511 1 0 6625628 0 9072692 0 0 21 2835 1103 9 0 3 96
1 511 1 0 6595384 0 9102340 0 0 0 2791 1101 10 0 4 96
1 511 1 0 6566500 0 9130468 0 0 1 2870 1103 8 0 3 97
1 511 1 0 6535240 0 9161088 0 0 1 2891 1104 7 0 2 97
1 511 1 0 6506408 0 9189280 0 0 1 2831 1102 8 0 3 97
2 510 1 0 6474892 0 9219692 0 0 1 2954 1104 10 0 4 96
1 511 1 0 6446944 0 9247368 0 0 2 2793 1101 9 0 2 98
0 512 1 0 6417712 0 9276400 0 0 3 2808 1104 15 0 3 97
0 512 1 0 6386148 0 9306724 0 0 3 2932 1103 13 0 3 97
0 512 1 0 6355680 0 9336752 0 0 2 2917 1106 10 0 4 96
3 509 1 0 6328132 0 9363816 0 0 4 2737 1103 17 0 3 97
procs memory swap io system cpu
r b w swpd free buff cache si so bi bo in cs us sy id
0 513 1 0 6296992 0 9393708 0 0 3 2887 1104 14 0 4 96
0 512 1 0 6270080 0 9420724 0 0 2 2767 1106 11 0 3 97
0 512 1 0 6239632 0 9449904 0 0 3 2905 1103 17 0 4 96
0 512 1 0 6211120 0 9477884 0 0 3 2786 1101 10 0 3 97
0 512 1 0 6182544 0 9506248 0 0 4 2821 1103 11 0 3 97
0 512 1 0 6153224 0 9534520 0 0 2 2890 1102 11 0 3 97
0 512 1 0 6123908 0 9563556 0 0 39 2789 1106 18 0 5 95
0 512 1 0 6095808 0 9591008 0 0 4 2829 1104 12 0 3 97
0 512 1 0 6065320 0 9620528 0 0 2 2877 1103 11 0 3 97
0 512 1 0 6036204 0 9649112 0 0 2 2813 1105 18 0 4 95
0 512 1 0 6008404 0 9676656 0 0 1 2832 1105 11 0 4 96
0 512 1 0 5979352 0 9705188 0 0 0 2834 1102 11 0 3 97
0 512 1 0 5950212 0 9733380 0 0 0 2839 1103 12 0 3 96
0 512 1 0 5920924 0 9761812 0 0 1 2861 1106 11 0 3 96
2 510 1 0 5892504 0 9789956 0 0 2 2773 1105 11 0 3 97
1 511 1 0 5862944 0 9818284 0 0 0 2831 1105 14 0 4 96
0 512 1 0 5833700 0 9846684 0 0 2 2799 1107 21 0 4 95
1 511 1 0 5806112 0 9874076 0 0 0 2743 1105 17 0 4 96
0 512 1 0 5777160 0 9902324 0 0 2 2774 1106 31 1 6 94
0 512 1 0 5749864 0 9929472 0 0 0 2732 1102 11 0 3 97
1 511 1 0 5720448 0 9958276 0 0 1 2817 1106 15 0 4 96
procs memory swap io system cpu
r b w swpd free buff cache si so bi bo in cs us sy id
1 511 1 0 5690996 0 9987028 0 0 0 2880 1107 16 0 4 95
0 512 1 0 5661268 0 10015812 0 0 2 2858 1104 12 0 4 96
0 512 1 0 5632096 0 10044776 0 0 2 2748 1103 11 0 3 97
7 505 1 0 5607828 0 10068312 0 0 21 2858 1129 30 1 6 93
0 512 1 0 5575800 0 10099712 0 0 34 2713 1108 33 0 13 87
6 506 1 0 5545128 0 10128844 0 0 2 2984 1114 35 0 5 94
0 512 1 0 5514480 0 10159328 0 0 112 2824 1115 46 1 9 91
0 512 1 0 5485404 0 10187644 0 0 3 2894 1111 37 1 6 94
2 510 1 0 5457668 0 10214952 0 0 3 2747 1114 35 1 7 93
0 512 1 0 5426568 0 10244836 0 0 2 2930 1113 34 1 6 94
0 512 1 0 5397912 0 10272996 0 0 2 2798 1106 19 0 4 96
0 512 1 0 5370080 0 10300712 0 0 4 2766 1109 58 1 6 93
0 512 1 0 5341324 0 10328744 0 0 1 2763 1107 27 0 5 95
1 511 1 0 5313236 0 10356208 0 0 2 2810 1108 15 0 4 96
0 512 1 0 5283084 0 10385644 0 0 2 2814 1107 31 0 5 95
0 512 1 0 5254348 0 10413472 0 0 2 2876 1107 19 0 4 96
0 512 1 0 5226876 0 10440616 0 0 5 2738 1113 88 1 24 76
1 511 1 0 5197164 0 10469304 0 0 2 2863 1113 40 1 6 93
0 512 1 0 5169448 0 10496036 0 0 1 2792 1104 24 0 5 94
0 512 1 0 5141960 0 10523728 0 0 26 2728 1107 27 0 4 96
1 511 1 0 5112580 0 10551664 0 0 0 2825 1112 67 1 21 78
procs memory swap io system cpu
r b w swpd free buff cache si so bi bo in cs us sy id
0 512 1 0 5084232 0 10579604 0 0 0 2718 1110 37 1 9 91
0 512 1 0 5057348 0 10606140 0 0 1 2722 1113 63 1 29 70
1 511 1 0 5031844 0 10631100 0 0 1 2781 1110 40 1 6 93
0 512 1 0 5000676 0 10661360 0 0 1 2666 1111 63 1 24 75
1 511 1 0 4973048 0 10688612 0 0 0 2761 1106 13 0 3 96
1 511 1 0 4945132 0 10715932 0 0 1 2729 1108 36 1 8 92
1 511 1 0 4913792 0 10746284 0 0 3 2759 1113 70 1 25 74
17 495 1 0 4893276 0 10766836 0 0 0 2751 1130 33 1 10 89
0 512 1 0 4859448 0 10799772 0 0 21 2715 1111 51 1 28 71
1 511 1 0 4830860 0 10827544 0 0 31 2740 1112 61 1 15 84
0 512 1 0 4803540 0 10854056 0 0 2 2730 1112 55 1 23 76
46 466 1 0 4783896 0 10873464 0 0 3 2530 1126 186 2 52 46
0 512 1 0 4727848 0 10927944 0 0 2 2751 1113 87 1 40 59
1 511 1 0 4699816 0 10955220 0 0 2 2783 1118 67 1 10 89
2 510 1 0 4671984 0 10982724 0 0 1 2745 1109 19 0 4 96
1 511 1 0 4647732 0 11006304 0 0 2 2754 1113 43 1 8 91
0 512 1 0 4615392 0 11037568 0 0 1 2788 1109 36 1 8 91
0 512 1 0 4588104 0 11064532 0 0 2 2715 1108 36 1 6 94
5 507 1 0 4558404 0 11093124 0 0 4 2792 1119 100 1 20 79
0 512 1 0 4532236 0 11119008 0 0 2 2700 1112 35 1 6 93
1 511 1 0 4503824 0 11146548 0 0 0 2821 1109 26 1 5 94
procs memory swap io system cpu
r b w swpd free buff cache si so bi bo in cs us sy id
0 512 1 0 4464900 0 11185036 0 0 4 2688 1121 145 1 55 43
15 497 1 0 4452708 0 11196928 0 0 1 2780 1134 77 1 18 82
21 491 1 0 4415616 0 11232624 0 0 4 2718 1123 170 2 77 21
1 511 1 0 4387976 0 11259524 0 0 1 2716 1107 49 1 13 87
0 512 1 0 4357528 0 11289292 0 0 2 2632 1116 157 2 50 48
18 494 1 0 4336624 0 11310296 0 0 2 2617 1116 137 1 20 79
1 511 1 0 4306500 0 11339308 0 0 1 2760 1110 66 1 22 77
51 461 1 0 4290888 0 11354840 0 0 14 2668 1119 115 1 40 59
30 482 1 0 4263016 0 11381860 0 0 2 2684 1116 108 1 49 50
146 366 2 0 4229972 0 11414624 0 0 2 2630 1121 185 2 98 0
0 512 1 0 4189560 0 11453328 0 0 3 2691 1117 157 1 64 35
0 512 1 0 4167640 0 11474876 0 0 2 2700 1113 83 1 16 83
10 502 1 0 4145668 0 11496432 0 0 0 2606 1118 105 2 56 42
74 438 1 0 4116664 0 11524812 0 0 10 2618 1122 161 2 96 2
187 325 1 0 4118092 0 11523044 0 0 1 2624 1123 211 2 98 0
304 208 2 0 4063200 0 11577608 0 0 2 2656 1147 194 2 98 0
37 475 1 0 4044028 0 11595504 0 0 2 2662 1130 185 2 70 28
157 355 1 0 4037396 0 11601984 0 0 2 2572 1119 179 2 98 0
263 249 2 0 4008540 0 11630764 0 0 2 2554 1121 195 2 98 0
375 137 1 0 3996592 0 11642044 0 0 1 2672 1120 187 2 98 0
484 28 2 0 3954796 0 11683672 0 0 2 2620 1121 179 2 98 0
procs memory swap io system cpu
r b w swpd free buff cache si so bi bo in cs us sy id
512 0 1 0 3962612 0 11675468 0 0 2 1278 1144 203 2 98 0
512 0 2 0 3931376 0 11706564 0 0 0 1572 1143 183 2 98 0
511 0 2 0 3924356 0 11715812 0 0 3 1295 1144 218 2 98 0
511 0 1 0 3923176 0 11714456 0 0 2 1528 1144 199 2 98 0
510 1 2 0 3926740 0 11712952 0 0 2 2152 1127 208 2 98 0
511 0 2 0 3919160 0 11720444 0 0 0 1216 1143 204 2 98 0
509 2 2 0 3952668 0 11686496 0 0 0 1290 1151 206 2 98 0
511 0 2 0 3944192 0 11694232 0 0 0 1400 1142 193 2 98 0
511 0 1 0 3979192 0 11660256 0 0 0 1696 1135 191 2 98 0
509 0 2 0 3997656 0 11642040 0 0 1 775 1153 190 2 98 0
509 0 1 0 3999412 0 11640236 0 0 0 1667 1138 189 2 98 0
509 0 1 0 3988136 0 11648228 0 0 0 955 1157 195 2 98 0
508 1 1 0 4006224 0 11633260 0 0 1 1168 1140 226 2 98 0
508 0 1 0 4036952 0 11599396 0 0 0 1557 1146 214 2 98 0
507 0 2 0 4051844 0 11584960 0 0 0 1533 1144 206 2 98 0
503 0 2 0 4112112 0 11528108 0 0 0 2127 1124 181 2 98 0
501 2 1 0 4093032 0 11547088 0 0 0 1604 1144 203 2 98 0
503 0 1 0 4100296 0 11539728 0 0 1 1536 1141 192 2 98 0
503 0 1 0 4153784 0 11486160 0 0 0 1292 1143 228 2 98 0
500 1 1 0 4202116 0 11438076 0 0 0 722 1156 219 2 98 0
499 0 1 0 4232768 0 11407708 0 0 0 1074 1147 190 2 98 0
procs memory swap io system cpu
r b w swpd free buff cache si so bi bo in cs us sy id
498 0 1 0 4245960 0 11394600 0 0 0 1031 1153 197 2 98 0
496 0 1 0 4317348 0 11323444 0 0 0 1301 1147 213 2 98 0
495 0 3 0 4349556 0 11289944 0 0 0 2063 1139 183 2 98 0
494 0 1 0 4374812 0 11263824 0 0 0 2022 1136 204 2 98 0
484 6 1 0 4455692 0 11184128 0 0 0 1586 1140 194 2 98 0
488 0 1 0 4519336 0 11119252 0 0 0 2726 1127 173 2 98 0
458 25 3 0 4604064 0 11036628 0 0 0 1864 1140 235 2 98 0
479 0 1 0 4727324 0 10914252 0 0 0 2126 1131 178 2 98 0
475 0 2 0 4785124 0 10855204 0 0 0 2500 1129 178 2 98 0
469 1 1 0 4870052 0 10771256 0 0 0 2451 1122 178 2 98 0
468 0 1 0 4894780 0 10746320 0 0 0 2528 1125 167 2 98 0
461 0 1 0 5098844 0 10543828 0 0 0 2067 1125 184 2 98 0
455 0 1 0 5200836 0 10442688 0 0 0 2351 1131 172 2 98 0
447 0 1 0 5355456 0 10289656 0 0 0 2373 1127 184 2 98 0
444 0 1 0 5522224 0 10122984 0 0 0 2478 1125 174 2 98 0
431 0 2 0 5718152 0 9929460 0 0 0 2605 1122 178 2 98 0
425 0 1 0 5927768 0 9720220 0 0 0 2769 1123 174 2 98 0
408 0 1 0 6235760 0 9414664 0 0 0 2754 1127 174 2 98 0
401 0 1 0 6417560 0 9234080 0 0 0 2753 1120 162 2 98 0
381 8 1 0 6679396 0 8974080 0 0 0 2613 1122 180 2 98 0
374 1 1 0 7014740 0 8640536 0 0 0 2711 1121 182 2 98 0
procs memory swap io system cpu
r b w swpd free buff cache si so bi bo in cs us sy id
366 0 2 0 7226640 0 8429968 0 0 0 2670 1125 182 2 98 0
352 0 2 0 7540784 0 8118040 0 0 0 2644 1123 177 2 98 0
348 0 1 0 7635932 0 8023952 0 0 0 2611 1122 172 2 98 0
343 0 1 0 7744096 0 7916516 0 0 0 2706 1124 158 2 98 0
339 0 1 0 7799716 0 7861344 0 0 0 2628 1117 158 2 98 0
335 0 1 0 7896960 0 7764748 0 0 0 2652 1119 159 2 98 0
331 0 1 0 8022476 0 7639148 0 0 0 2694 1123 167 2 98 0
325 0 1 0 8140000 0 7522724 0 0 0 2628 1119 169 2 98 0
316 0 2 0 8306312 0 7357656 0 0 0 2605 1121 162 2 98 0
308 0 2 0 8510444 0 7154704 0 0 0 2617 1121 196 2 98 0
301 1 1 0 8651348 0 7014896 0 0 0 2601 1117 158 2 98 0
293 0 1 0 8832568 0 6835252 0 0 0 2580 1119 157 2 98 0
286 0 1 0 9002060 0 6666908 0 0 0 2717 1123 165 2 98 0
278 0 1 0 9158980 0 6511276 0 0 0 2668 1118 150 2 98 0
273 0 1 0 9280348 0 6390320 0 0 0 2685 1121 155 2 98 0
256 0 2 0 9620268 0 6053080 0 0 0 2656 1121 170 2 98 0
253 0 2 0 9684960 0 5988192 0 0 0 2698 1119 151 2 98 0
249 0 1 0 9764732 0 5909552 0 0 0 2599 1119 154 2 98 0
243 0 1 0 9900232 0 5774964 0 0 0 2648 1119 150 2 98 0
236 0 1 0 10040144 0 5635812 0 0 0 2643 1117 152 2 98 0
227 0 2 0 10264664 0 5413280 0 0 0 2614 1123 168 2 98 0
procs memory swap io system cpu
r b w swpd free buff cache si so bi bo in cs us sy id
219 1 2 0 10438612 0 5239980 0 0 0 2752 1124 155 2 98 0
213 0 1 0 10621820 0 5057548 0 0 0 2649 1118 150 2 98 0
203 0 1 0 10914592 0 4766988 0 0 0 2594 1120 165 2 98 0
189 0 1 0 11160692 0 4522212 0 0 0 2727 1119 155 2 98 0
185 0 1 0 11303236 0 4380332 0 0 0 2677 1120 159 2 98 0
176 0 1 0 11492392 0 4192492 0 0 0 2744 1119 159 2 98 0
169 0 1 0 11630124 0 4055636 0 0 0 2772 1121 148 2 98 0
156 0 1 0 11889592 0 3798296 0 0 0 2682 1120 153 2 98 0
141 0 2 0 12219120 0 3470760 0 0 0 2584 1116 157 2 98 0
132 0 2 0 12410372 0 3280848 0 0 0 2520 1113 149 2 98 0
121 0 1 0 12632632 0 3060512 0 0 0 2676 1120 148 2 98 0
115 0 1 0 12802380 0 2891428 0 0 0 2601 1116 148 2 98 0
101 0 1 0 13116068 0 2580380 0 0 0 2716 1122 165 2 98 0
83 2 1 0 13489008 0 2209960 0 0 0 2719 1119 155 2 98 0
80 0 1 0 13639208 0 2060280 0 0 0 2803 1119 157 2 98 0
60 0 1 0 14028280 0 1674380 0 0 0 2750 1117 152 2 98 0
47 0 1 0 14323412 0 1380688 0 0 0 2802 1119 142 2 98 0
33 0 1 0 14667540 0 1039752 0 0 0 2701 1121 154 2 98 0
13 1 1 0 15073012 0 636504 0 0 0 2751 1118 132 2 97 1
0 1 2 0 15368508 0 342820 0 0 0 2741 1100 103 1 21 78
0 0 1 0 15451236 0 332436 0 0 0 744 1134 19 0 2 97

Script done on Thu Aug 15 18:41:37 2002
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