Cat kernel source during seq read DL - 0.03user 0.13system 5:21.39elapsed AS - 0.02user 0.14system 0:14.50elapsed CF - 0.01user 0.13system 4:52.79elapsed Cat kernel source during seq write DL - 0.03user 0.14system 14:06.45elapsed AS - 0.02user 0.14system 0:16.33elapsed CF - N/A * Test DNF after 20 minutes. "Equilibrium" state is 5s pauses between reads of ~500K and continual ~45MB/s writes ls -lr kernel source during seq read DL - 0.18user 0.31system 0:24.32elapsed AS - 0.19user 0.32system 0:09.39elapsed CF - 0.18user 0.29system 0:23.76elapsed ls -lr kernel source during seq write DL - 0.23user 0.34system 1:13.90elapsed AS - 0.18user 0.32system 0:05.49elapsed CF - 0.20user 0.33system 0:47.19elapsed Contest no_load: Kernel [runs] Time CPU% Loads LCPU% Ratio 2.5.65-mm4-dl 1 69 95.7 0.0 0.0 1.00 2.5.65-mm4-as 1 69 95.7 0.0 0.0 1.00 2.5.65-mm4-cf 1 69 95.7 0.0 0.0 1.00 io_load: Kernel [runs] Time CPU% Loads LCPU% Ratio 2.5.65-mm4-dl 1 149 46.3 121.0 22.8 2.16 2.5.65-mm4-as 1 100 70.0 81.2 22.0 1.45 2.5.65-mm4-cf 1 121 57.9 77.8 18.0 1.75 read_load: Kernel [runs] Time CPU% Loads LCPU% Ratio 2.5.65-mm4-dl 1 91 78.0 12.8 6.6 1.32 2.5.65-mm4-as 1 100 72.0 15.6 8.0 1.45 2.5.65-mm4-cf 1 92 76.1 12.5 6.5 1.33 list_load: Kernel [runs] Time CPU% Loads LCPU% Ratio 2.5.65-mm4-dl 1 87 78.2 5.0 18.4 1.26 2.5.65-mm4-as 1 94 72.3 6.0 19.1 1.36 2.5.65-mm4-cf 1 89 76.4 5.0 18.0 1.29 tiobench Only did 1 and 4 threads for CFQ. It is not a scheduler for a server. Unit information ================ File size = 1024MB Blk Size = 4096B Sequential Reads Num Avg Maximum Lat% Lat% CPU Identifier Thr Rate (CPU%) Latency Latency >2s >10s Eff --------------- --- ------ ------ --------- ----------- ----- ------ ----- 2.5.65-mm4-dl 1 48.21 11.09% 0.080 36.49 0.00 0.00 435 2.5.65-mm4-dl 4 11.47 2.500% 1.358 86.84 0.00 0.00 459 2.5.65-mm4-dl 16 13.18 3.049% 4.704 311.43 0.00 0.00 432 2.5.65-mm4-dl 256 10.32 2.489% 58.877 69755.23 0.09 0.07 414 2.5.65-mm4-as 1 49.23 11.52% 0.078 28.10 0.00 0.00 427 2.5.65-mm4-as 4 39.56 9.461% 0.387 217.46 0.00 0.00 418 2.5.65-mm4-as 16 37.81 8.902% 1.571 929.76 0.00 0.00 425 2.5.65-mm4-as 256 33.10 7.822% 17.405 26072.15 0.25 0.05 423 2.5.65-mm4-cf 1 48.80 12.66% 0.079 28.16 0.00 0.00 385 2.5.65-mm4-cf 4 12.38 2.607% 1.184 276.88 0.00 0.00 475 Random Reads 2.5.65-mm4-dl 1 0.59 0.488% 6.647 23.35 0.00 0.00 120 2.5.65-mm4-dl 4 0.59 0.178% 26.003 96.85 0.00 0.00 332 2.5.65-mm4-dl 16 0.67 0.327% 88.082 403.66 0.00 0.00 206 2.5.65-mm4-dl 256 0.61 0.480% 1064.411 16058.51 3.02 2.68 127 2.5.65-mm4-as 1 0.57 0.504% 6.829 28.33 0.00 0.00 113 2.5.65-mm4-as 4 0.63 0.584% 23.283 220.36 0.00 0.00 108 2.5.65-mm4-as 16 0.63 0.624% 87.513 596.26 0.00 0.00 101 2.5.65-mm4-as 256 0.85 0.852% 659.708 14613.03 13.15 1.04 99 2.5.65-mm4-cf 1 0.59 0.554% 6.581 22.38 0.00 0.00 107 2.5.65-mm4-cf 4 0.59 0.203% 25.473 105.73 0.00 0.00 289 Sequential Writes 2.5.65-mm4-dl 1 42.85 20.66% 0.082 992.45 0.00 0.00 207 2.5.65-mm4-dl 4 43.04 20.94% 0.291 1104.10 0.00 0.00 205 2.5.65-mm4-dl 16 37.10 17.68% 1.188 6594.20 0.02 0.00 210 2.5.65-mm4-dl 256 29.38 14.76% 15.689 30675.42 0.17 0.06 199 2.5.65-mm4-as 1 44.15 21.43% 0.080 1025.37 0.00 0.00 206 2.5.65-mm4-as 4 40.94 19.79% 0.299 1087.51 0.00 0.00 207 2.5.65-mm4-as 16 35.62 16.89% 1.220 5965.63 0.02 0.00 211 2.5.65-mm4-as 256 28.20 14.15% 16.388 33732.92 0.17 0.06 199 2.5.65-mm4-cf 1 45.22 21.20% 0.078 1222.02 0.00 0.00 213 2.5.65-mm4-cf 4 33.45 15.87% 0.367 1602.89 0.00 0.00 211 Random Writes 2.5.65-mm4-dl 1 0.81 0.467% 0.033 32.69 0.00 0.00 174 2.5.65-mm4-dl 4 0.79 0.509% 0.934 75.36 0.00 0.00 155 2.5.65-mm4-dl 16 0.81 0.484% 3.573 518.44 0.00 0.00 166 2.5.65-mm4-dl 256 0.99 0.561% 48.837 7073.10 0.60 0.00 176 2.5.65-mm4-as 1 0.82 0.472% 0.034 32.15 0.00 0.00 174 2.5.65-mm4-as 4 0.81 0.518% 0.818 137.50 0.00 0.00 156 2.5.65-mm4-as 16 0.79 0.516% 4.735 476.85 0.00 0.00 153 2.5.65-mm4-as 256 0.94 0.524% 79.319 7416.65 0.96 0.00 179 2.5.65-mm4-cf 1 0.78 0.433% 0.334 25.19 0.00 0.00 180 2.5.65-mm4-cf 4 0.89 0.515% 4.068 12795.50 0.03 0.03 172 * CFQ has latency problems here for some reason. OraSim (bigger is better) DL - 132, 144 AS - 129, 140 CF - 97, 121 nickbench (IO rate is total combined throughput) Bench 2 - 2 threads, streaming reader and streaming writer DL - IO Rate: 33.36 MB/s, Reads per write: 0.08 AS - IO Rate: 42.19 MB/s, Reads per write: 2.08 CF - IO Rate: 32.00 MB/s, Reads per write: 0.12 Bench 3 - 2 threads, streaming readers DL - IO Rate: 12.64 MB/s, Reads per read: 0.95 AS - IO Rate: 45.56 MB/s, Reads per read: 1.00 CF - IO Rate: 11.93 MB/s, Reads per read: 0.99 Bench 4 - 2 threads, streaming writers DL - IO Rate: 38.59 MB/s, Writes per write: 1.45 AS - IO Rate: 40.64 MB/s, Writes per write: 1.68 CF - IO Rate: 37.88 MB/s, Writes per write: 1.66 Bench 5 - 1 thread, read then write each block of 1 file DL - IO Rate: 40.24 MB/s, CPU time per byte: 4732.421875 us/B AS - IO Rate: 45.30 MB/s, CPU time per byte: 5238.281250 us/B CF - IO Rate: 38.80 MB/s, CPU time per byte: 4718.750000 us/B Bench 6 - 4 threads, streaming readers DL - IO Rate: 11.87 MB/s, Greatest unfairness between 4 readers: 0.95 AS - IO Rate: 44.89 MB/s, Greatest unfairness between 4 readers: 0.95 CF - IO Rate: 11.27 MB/s, Greatest unfairness between 4 readers: 0.5 * in this CFQ result, 2 threads read 256MB, 2 read 128MB