Hi,
Here are the results of comparison of Kernel 2.5.51 with mm2 patch and 2.5.51 with mm1 patch.
Please see the mail in full size window to avoid text wrap problem.
Key findings of the comparison:
1. Great reduction in maximum latency.
2. better throughput of CPU mainly because less usage for same work.
3. mega-bytes transfered per second have also improved.
many optimizations done in the pathces. they must perform :)
*******************************************************************************
TIO BENCH PERFORMANCE RESULT
LINUX KERNEL 2.5.51 with mm2
Date: December 12TH 2002
*******************************************************************************
No size specified, using 252 MB
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
---------------------------- ------ ----- --- ------ ------ --------- ----------- -------- -------- -----
2.5.51 252 4096 10 8.81 5.345% 12.244 1894.78 0.00000 0.00000 165
Random Reads
File Blk Num Avg Maximum Lat% Lat% CPU
Identifier Size Size Thr Rate (CPU%) Latency Latency >2s >10s Eff
---------------------------- ------ ----- --- ------ ------ --------- ----------- -------- -------- -----
2.5.51 252 4096 10 0.51 0.750% 206.139 1306.27 0.00000 0.00000 68
Sequential Writes
File Blk Num Avg Maximum Lat% Lat% CPU
Identifier Size Size Thr Rate (CPU%) Latency Latency >2s >10s Eff
---------------------------- ------ ----- --- ------ ------ --------- ----------- -------- -------- -----
2.5.51 252 4096 10 17.56 32.68% 3.841 28833.24 0.05625 0.00156 54
Random Writes
File Blk Num Avg Maximum Lat% Lat% CPU
Identifier Size Size Thr Rate (CPU%) Latency Latency >2s >10s Eff
---------------------------- ------ ----- --- ------ ------ --------- ----------- -------- -------- -----
2.5.51 252 4096 10 0.72 1.013% 3.694 4066.20 0.07500 0.00000 71
*******************************************************************************
TIO BENCH PERFORMANCE RESULT
LINUX KERNEL 2.5.51 with mm1
Date: December 11TH 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
---------------------------- ------ ----- --- ------ ------ --------- ----------- -------- -------- -----
2.5.51 252 4096 10 8.57 5.375% 12.720 1712.91 0.00000 0.00000 159
Random Reads
File Blk Num Avg Maximum Lat% Lat% CPU
Identifier Size Size Thr Rate (CPU%) Latency Latency >2s >10s Eff
---------------------------- ------ ----- --- ------ ------ --------- ----------- -------- -------- -----
2.5.51 252 4096 10 0.50 1.073% 205.984 1278.60 0.00000 0.00000 47
Sequential Writes
File Blk Num Avg Maximum Lat% Lat% CPU
Identifier Size Size Thr Rate (CPU%) Latency Latency >2s >10s Eff
---------------------------- ------ ----- --- ------ ------ --------- ----------- -------- -------- -----
2.5.51 252 4096 10 17.86 33.77% 3.850 21603.95 0.06406 0.00000 53
Random Writes
File Blk Num Avg Maximum Lat% Lat% CPU
Identifier Size Size Thr Rate (CPU%) Latency Latency >2s >10s Eff
---------------------------- ------ ----- --- ------ ------ --------- ----------- -------- -------- -----
2.5.51 252 4096 10 0.77 1.091% 0.736 1551.03 0.00000 0.00000 70
========================================================================================================================
Regards,
---------------------------------------------------------------
Aniruddha Marathe
Systems Engineer,
4th floor, WIPRO technologies,
53/1, Hosur road,
Madivala,
Bangalore - 560068
Karnataka, India
Phone: +91-80-5502001 extension 5092
E-mail: aniruddha.marathe@wipro.com
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This archive was generated by hypermail 2b29 : Sun Dec 15 2002 - 22:00:24 EST