Very Computer

Hi,
Here are the results of comparison of kernel 2.5.51 and 2.5.52 on TIObench.
key findings.

-------------------------------------------------------------
test                                    2.5.52 (as compared to
                                        2.5.51) APPRXIMATE % change
-------------------------------------------------------------
rate (megabytes per second)     5% decrease
CPU % utilization                       5% decrease
Average Latency                 less than 2% increase
Maximum latency                 15 % increase          
CPU efficiency                  less than 2% increase
-------------------------------------------------------------

-------------------------------------------------------------
                        Linux kernel 2.5.52
                        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    8.48 5.251%    12.152     1825.07   0.00000  0.00000   161

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 0.729%   211.130     1079.20   0.00000  0.00000    69

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   16.17 30.00%     4.525    29226.70   0.06094  0.00625    54

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    0.78 1.084%     0.675      992.39   0.00000  0.00000    72

regards,
Aniruddha Marathe
WIPRO Technologies, India

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