[BENCHMARK] 52-mm1 patch-TIO bench- maximum I/O latency on rise.

[Aniruddha M Marathe]

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
[e-mail]