[BENCH MARK] 'tiobench' results comparision for 2.5.43 kernel and 2.4.19

From: Siva Koti Reddy (siva.kotireddy@wipro.com)
Date: Wed Oct 16 2002 - 07:15:57 EST

Hai...
    Here is the benchmark results of tiobench for 2.5.43 kernel and 2.4.19
kernel. There is a drastic performance degradation in Read operations of
2.5.43 kernel as compared to 2.4.19 kernel though there is a little
improvement in write operations. Any cooments..?

Details of Test Machine:
=================
Hardware: 400Mhz Celeron with 64Mb Ram with ext2 file system.

************************************************************************
linux-2.5.43
Tiotest results for 4 concurrent io threads:
,----------------------------------------------------------------------.
| Item | Time | Rate | Usr CPU | Sys CPU |
+-----------------------+----------+--------------+----------+---------+
| Write 40 MBs | 8.9 s | 4.509 MB/s | 0.4 % | 6.2 % |
| Random Write 16 MBs | 19.5 s | 0.802 MB/s | 0.0 % | 1.4 % |
| Read 40 MBs | 7.9 s | 5.090 MB/s | 0.3 % | 4.9 % |
| Random Read 16 MBs | 37.3 s | 0.419 MB/s | 0.1 % | 1.2 % |
`----------------------------------------------------------------------'
Tiotest latency results:
,-------------------------------------------------------------------------.
| Item | Average latency | Maximum latency | % >2 sec | % >10 sec |
+--------------+-----------------+-----------------+----------+-----------+
| Write | 2.144 ms | 3340.874 ms | 0.02930 | 0.00000 |
| Random Write | 7.420 ms | 8241.095 ms | 0.10000 | 0.00000 |
| Read | 2.526 ms | 534.798 ms | 0.00000 | 0.00000 |
| Random Read | 35.709 ms | 131.234 ms | 0.00000 | 0.00000 |
|--------------+-----------------+-----------------+----------+-----------|
| Total | 7.737 ms | 8241.095 ms | 0.02458 | 0.00000 |
`--------------+-----------------+-----------------+----------+-----------'

*********************************************************************
linux-2.4.19
Tiotest results for 4 concurrent io threads:
,----------------------------------------------------------------------.
| Item | Time | Rate | Usr CPU | Sys CPU |
+-----------------------+----------+--------------+----------+---------+
| Write 40 MBs | 9.7 s | 4.135 MB/s | 0.3 % | 3.9 % |
| Random Write 16 MBs | 27.3 s | 0.573 MB/s | 0.0 % | 0.4 % |
| Read 40 MBs | 1.7 s | 23.597 MB/s | 0.6 % | 14.2 % |
| Random Read 16 MBs | 4.0 s | 3.879 MB/s | 0.7 % | 4.5 % |
`----------------------------------------------------------------------'
Tiotest latency results:
,-------------------------------------------------------------------------.
| Item | Average latency | Maximum latency | % >2 sec | % >10 sec |
+--------------+-----------------+-----------------+----------+-----------+
| Write | 0.618 ms | 1449.211 ms | 0.00000 | 0.00000 |
| Random Write | 0.100 ms | 61.018 ms | 0.00000 | 0.00000 |
| Read | 0.158 ms | 59.913 ms | 0.00000 | 0.00000 |
| Random Read | 1.561 ms | 484.705 ms | 0.00000 | 0.00000 |
|--------------+-----------------+-----------------+----------+-----------|
| Total | 0.512 ms | 1449.211 ms | 0.00000 | 0.00000 |
`--------------+-----------------+-----------------+----------+-----------'

Rgds,
Siva


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This archive was generated by hypermail 2b29 : Wed Oct 23 2002 - 22:00:27 EST