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SubjectRe: [PATCH] concurrent block allocation for ext2 against 2.5.64
On Fri, Mar 14, 2003 at 08:54:55PM -0800, Andrew Morton wrote:
> `dbench 512' will presumably do lots of IO and spend significant
> time in I/O wait. You should see the effects of this change more
> if you use fewer clients (say, 32) so it doesn't hit disk.

Throughput 226.57 MB/sec 32 procs
dbench 32 2>& 1 25.04s user 515.02s system 1069% cpu 50.516 total

vma samples %-age symbol name
c0106ff4 1877599 35.8654 default_idle
c01dc3b0 586997 11.2127 __copy_to_user_ll
c0108140 193213 3.6907 .text.lock.semaphore
c015249a 137467 2.62586 .text.lock.file_table
c01dc418 117981 2.25364 __copy_from_user_ll
c01dc59c 115415 2.20463 .text.lock.dec_and_lock
c016997b 106198 2.02857 .text.lock.dcache
c0119dac 98439 1.88036 scheduler_tick
c01dc510 95745 1.8289 atomic_dec_and_lock
c0119058 91746 1.75251 try_to_wake_up
c011fadc 88996 1.69998 profile_hook
c0107d0c 84514 1.61436 __down
c01522a0 70518 1.34702 file_move
c011a1bc 68364 1.30587 schedule
c011c4ff 59716 1.14068 .text.lock.sched
c0168aac 58337 1.11434 d_lookup
c015f3dc 58111 1.11002 path_lookup
c0119860 55141 1.05329 load_balance

procs -----------memory---------- -----io---- --system-- ----cpu----
r b free buff cache bi bo in cs us sy id wa
11 0 47538048 549664 737120 0 0 1028 12123 2 33 65 0
6 2 47534592 550880 738272 0 16312 1085 12498 2 28 67 3
15 2 47559680 552064 711936 0 2332 1111 12197 2 30 63 6
10 3 47539648 547808 737344 0 5012 1174 12683 2 28 63 8
13 4 47585600 548736 689728 0 1616 1173 12393 2 31 58 8
17 2 47575680 550432 699264 0 2252 1224 12135 2 35 54 8
31 2 47643008 550944 631712 0 2216 1189 4795 2 82 15 2
28 1 47724288 551296 548320 0 2532 1178 4297 2 77 18 4
25 2 47798464 552032 473824 0 2724 1199 3283 2 73 22 3
12 5 48026944 552096 243296 0 2272 1170 4389 2 54 37 7
0 9 48201344 552160 69696 0 3480 1167 466 0 8 62 29
1 4 48206720 552160 64512 0 3252 1173 152 0 0 83 16
1 2 48210880 552160 60864 0 3232 1163 106 0 0 90 9
2 2 48210880 552160 60864 0 3592 1163 111 0 0 93 6
1 8 48256320 552160 36928 0 3008 1146 587 0 2 79 20
2 7 48264128 552160 30016 0 3488 1153 170 0 0 76 24
2 6 48268544 552160 26912 0 3012 1151 145 0 0 79 21
2 5 48273408 552160 22400 0 312 1162 116 0 0 83 16
4 0 48277248 552160 21056 12 8 1051 184 0 1 97 1
0 0 48280448 552160 21280 0 0 1033 59 0 0 100 0
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