Messages in this thread |  | | | Subject | [BENCHMARK] 52-mm1 patch-TIO bench- maximum I/O latency on rise. | | Date | Mon, 16 Dec 2002 15:11:40 +0530 | | From | "Aniruddha M Marathe" <> |
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Hi, Here are the results of comparison of kernel 2.5.52 with mm1 and 2.5.52 on TIObench. key findings.
------------------------------------------------------------- test 2.5.52-mm1 (as compared to 2.5.52) APPRXIMATE % change ------------------------------------------------------------- rate (megabytes per second) less than 2% increase CPU % utilization less than 2% increase Average Latency 3 to 4% increase Maximum latency 20 % increase ( from 51 to 52 there was 15% increase) CPU efficiency less than 5% increase ------------------------------------------------------------- ------------------------------------------------------------- Linux kernel 2.5.52-mm1 TIO bench results Date 16th december 2002 ------------------------------------------------------------- Unit information ================ File size = megabytes Blk Size = bytes Rate = megabytes per second CPU% = percentage of CPU used during the test Latency = milliseconds Lat% = percent of requests that took longer than X seconds CPU Eff = Rate divided by CPU% - throughput per cpu load Sequential Reads File Blk Num Avg Maximum Lat% Lat% CPU Identifier Size Size Thr Rate (CPU%) Latency Latency >2s >10s Eff ---------------------------- ------ ----- --- ------ ------ --------- ----------- -------- -------- ----- 2.5.52 252 4096 10 8.75 5.008% 12.424 1947.51 0.00000 0.00000 175 Random Reads File Blk Num Avg Maximum Lat% Lat% CPU Identifier Size Size Thr Rate (CPU%) Latency Latency >2s >10s Eff ---------------------------- ------ ----- --- ------ ------ --------- ----------- -------- -------- ----- 2.5.52 252 4096 10 0.50 0.781% 212.562 1357.99 0.00000 0.00000 65 Sequential Writes File Blk Num Avg Maximum Lat% Lat% CPU Identifier Size Size Thr Rate (CPU%) Latency Latency >2s >10s Eff ---------------------------- ------ ----- --- ------ ------ --------- ----------- -------- -------- ----- 2.5.52 252 4096 10 16.79 31.59% 4.111 25844.57 0.06562 0.00156 53 Random Writes File Blk Num Avg Maximum Lat% Lat% CPU Identifier Size Size Thr Rate (CPU%) Latency Latency >2s >10s Eff ---------------------------- ------ ----- --- ------ ------ --------- ----------- -------- -------- ----- 2.5.52 252 4096 10 0.73 0.979% 1.375 1629.45 0.00000 0.00000 75 regards, Aniruddha Marathe WIPRO Technologies, India aniruddha.marathe@wipro.com - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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