Hi All,
We are making progress in the IO scheduler department. No benchmarks to the
list for a while so here is everyone's favourite (formatted for
readability).
If you are interested in IO performance, please try out the latest mm tree
and test as vs. deadline. If AS damages important your IO loads, please
report them to me and Andrew. Thanks.
UP PIII 1.0GHz 256MB
Kernel is plain 2.5.64-mm4
Antched-8192 is simply Antsched with 8192 request slots each for reads
and writes. It is there for interest - it hits platter speed on my rusty
old IDE disk in the seq tests. Other results have standard number of
requests.
File (set) size is 512MB
Block size is 4096
Num Avg Max CPU
Identifier Thr Rate CPU% Lat Lat Eff
Sequential Reads
------------------ --- ---- ----- ------ ----- ---
Deadline 32 10.8 3.8% 10 870 284
Deadline 64 10.1 3.5% 19 1706 288
Deadline 128 8.2 2.9% 32 32179 287
Antsched 32 21.3 7.8% 5 2056 275
Antsched 64 21.0 7.7% 8 9293 273
Antsched 128 18.7 6.9% 15 15417 272
Antsched-8192 32 19.7 7.5% 6 1804 261
Antsched-8192 64 26.3 9.2% 6 2834 285
Antsched-8192 128 23.0 8.6% 14 5005 266
Random Reads
------------------ --- ---- ----- ------ ----- ---
Deadline 32 0.8 0.5% 122 405 158
Deadline 64 0.8 0.6% 234 593 135
Deadline 128 0.8 0.6% 369 1010 135
Antsched 32 0.9 0.7% 117 994 119
Antsched 64 0.9 0.7% 165 1946 121
Antsched 128 1.0 0.7% 262 3558 136
Antsched-8192 32 0.8 0.7% 129 1280 112
Antsched-8192 64 0.9 0.7% 177 2177 123
Antsched-8192 128 1.0 0.7% 294 3639 132
Sequential Writes
------------------ --- ---- ----- ------ ----- ---
Deadline 32 19.6 22.4% 3 14430 87
Deadline 64 19.1 21.9% 6 22190 87
Deadline 128 18.7 21.9% 9 23285 86
Antsched 32 19.1 21.8% 3 14858 88
Antsched 64 19.1 22.1% 5 19031 87
Antsched 128 18.0 20.7% 10 25844 87
Antsched-8192 32 22.6 26.2% 3 9139 86
Antsched-8192 64 23.2 28.0% 3 8517 83
Antsched-8192 128 22.2 26.8% 3 10933 83
Random Writes
------------------ --- ---- ----- ------ ----- ---
Deadline 32 0.8 0.6% 3 2501 129
Deadline 64 0.8 0.7% 10 5128 118
Deadline 128 0.8 0.6% 21 6611 122
Antsched 32 0.8 0.6% 1 1024 124
Antsched 64 0.8 0.7% 11 2687 114
Antsched 128 0.8 0.7% 13 7445 112
Antsched-8192 32 1.0 0.8% 0.02 1 130
Antsched-8192 64 1.0 0.8% 0.03 30 128
Antsched-8192 128 0.9 0.7% 0.03 21 128
-
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This archive was generated by hypermail 2b29 : Sat Mar 15 2003 - 22:00:18 EST