Re: 2.4.8-pre1 and dbench -20% throughput
From: Steven Cole <hidden>
Date: 2001-07-29 17:48:30
On Saturday 28 July 2001 14:13, Daniel Phillips wrote: [snippage]
Oh, by the way, my suspicions about the flakiness of dbench as a benchmark were confirmed: under X, having been running various memory hungry applications for a while, dbench on vanilla 2.4.7 turned in a 7% better performance (with a distinctly different process termination pattern) than in text mode after a clean reboot.
From the FWIW department, apologies in advance if this is all moot.
Here are the results of nine runs of dbench 32. I ran vmstat before and after each instance of running time ./dbench 32. These verbose results are provided after the following summary. The test machine is a PIII 450, 384MB, ReiserFS on all partitions, disks IDE. Tests were all run from an xterm and KDE2. Steven 2.4.8-pre2 After running 8 hours Run #1 Throughput 5.77702 MB/sec Run #2 Throughput 5.8781 MB/sec Run #3 Throughput 6.08052 MB/sec 2.4.8-pre2 After fresh reboot Run #4 Throughput 7.18107 MB/sec Run #5 Throughput 7.0096 MB/sec Run #6 Throughput 7.1165 MB/sec 2.4.7 After fresh reboot Run #7 Throughput 8.96163 MB/sec Run #8 Throughput 9.20907 MB/sec Run #9 Throughput 9.88017 MB/sec ------------------------------------------------------------------------------- 2.4.8-pre2 After running 8 hours 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 26272 31248 12100 63688 2 1 49 185 580 158 2 7 91 [....snipped] Throughput 5.77702 MB/sec (NB=7.22127 MB/sec 57.7702 MBit/sec) 34.70user 426.52system 12:11.28elapsed 63%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (1008major+1402minor)pagefaults 0swaps procs memory swap io system cpu r b w swpd free buff cache si so bi bo in cs us sy id 1 0 0 26120 130808 5656 11236 2 1 53 249 716 156 2 9 89 [....snipped] Throughput 5.8781 MB/sec (NB=7.34763 MB/sec 58.781 MBit/sec) 34.55user 439.76system 11:59.61elapsed 65%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (1008major+1402minor)pagefaults 0swaps procs memory swap io system cpu r b w swpd free buff cache si so bi bo in cs us sy id 1 0 0 26120 130200 5152 11884 2 1 56 310 844 154 2 11 87 [....snipped] Throughput 6.08052 MB/sec (NB=7.60065 MB/sec 60.8052 MBit/sec) 34.36user 409.73system 11:35.69elapsed 63%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (1008major+1402minor)pagefaults 0swaps 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 26120 144324 4888 12024 2 1 59 366 962 153 2 13 86 ------------------------------------------------------------------------------- 2.4.8-pre2 After fresh reboot procs memory swap io system cpu r b w swpd free buff cache si so bi bo in cs us sy id 1 0 0 0 278468 9152 56208 0 0 296 118 950 248 13 15 73 [....snipped] Throughput 7.18107 MB/sec (NB=8.97633 MB/sec 71.8107 MBit/sec) 34.35user 348.11system 9:48.24elapsed 65%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (1008major+1402minor)pagefaults 0swaps procs memory swap io system cpu r b w swpd free buff cache si so bi bo in cs us sy id 1 0 0 0 287192 13064 34696 0 0 167 2090 4619 125 8 69 23 [....snipped] Throughput 7.0096 MB/sec (NB=8.762 MB/sec 70.096 MBit/sec) 33.05user 348.67system 10:03.62elapsed 63%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (1008major+1402minor)pagefaults 0swaps procs memory swap io system cpu r b w swpd free buff cache si so bi bo in cs us sy id 1 0 0 0 285804 14440 34700 0 0 145 2368 5128 107 7 76 17 [....snipped] Throughput 7.1165 MB/sec (NB=8.89563 MB/sec 71.165 MBit/sec) 34.67user 352.81system 9:54.57elapsed 65%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (1008major+1402minor)pagefaults 0swaps procs memory swap io system cpu r b w swpd free buff cache si so bi bo in cs us sy id 1 0 0 0 285192 15152 34700 0 0 136 2475 5324 101 7 79 14 ------------------------------------------------------------------------------- 2.4.7 After fresh reboot 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 278356 9288 56176 0 0 293 117 941 238 13 15 73 [....snipped] Throughput 8.96163 MB/sec (NB=11.202 MB/sec 89.6163 MBit/sec) 33.91user 244.57system 7:52.40elapsed 58%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (1008major+1402minor)pagefaults 0swaps procs memory swap io system cpu r b w swpd free buff cache si so bi bo in cs us sy id 1 0 0 0 309540 5808 22792 0 0 193 1761 4013 133 9 64 27 [....snipped] Throughput 9.20907 MB/sec (NB=11.5113 MB/sec 92.0907 MBit/sec) 34.43user 255.59system 7:39.69elapsed 63%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (1008major+1402minor)pagefaults 0swaps procs memory swap io system cpu r b w swpd free buff cache si so bi bo in cs us sy id 1 0 0 0 310780 5796 21920 0 0 175 2028 4511 113 9 72 19 [....snipped] Throughput 9.88017 MB/sec (NB=12.3502 MB/sec 98.8017 MBit/sec) 33.30user 248.82system 7:08.54elapsed 65%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (1008major+1402minor)pagefaults 0swaps procs memory swap io system cpu r b w swpd free buff cache si so bi bo in cs us sy id 1 0 0 0 311180 5356 22024 0 0 172 2124 4694 107 8 76 16 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/