Why is 2.4.32 four times faster than 2.6.14.6??

[Grant Coady]

Hi there,

Recently I started testing 2.6 stable on my firewall box here, I 
work via ssh terminals to firewall and have a good feel for the 
CLI responsiveness.

The test?  Just a simple display the apache access log, but it is 
very slow with 2.6 kernels (2.6.14.5, 2.6.14.6, 2.6.15):

2.4.32-hf32.1:
grant@deltree:~$ time grep -v 192\.168\. /var/log/apache/access_log |cut -c-96
[...]
2006-01-08 14:38:52 +1100: bugsplatter.mine.nu 207.46.98.39 "GET /test/linux-2.6/sempro/ HTTP/1.

real    0m1.562s
user    0m0.600s
sys     0m0.310s

2.6.14.6:
grant@deltree:~$ time grep -v 192\.168\. /var/log/apache/access_log |cut -c-96
[...]
2006-01-08 14:38:52 +1100: bugsplatter.mine.nu 207.46.98.39 "GET /test/linux-2.6/sempro/ HTTP/1.

real    0m6.318s
user    0m0.690s
sys     0m1.140s

grant@deltree:~$ /sbin/lspci
00:00.0 Host bridge: Intel Corporation 430FX - 82437FX TSC [Triton I] (rev 02)
00:07.0 ISA bridge: Intel Corporation 82371FB PIIX ISA [Triton I] (rev 02)
00:07.1 IDE interface: Intel Corporation 82371FB PIIX IDE [Triton I] (rev 02)
00:0d.0 Ethernet controller: Intel Corporation 82557/8/9 [Ethernet Pro 100] (rev 08)
00:0e.0 Ethernet controller: Intel Corporation 82557/8/9 [Ethernet Pro 100] (rev 08)
00:10.0 VGA compatible controller: S3 Inc. 86c764/765 [Trio32/64/64V+] (rev 44)

dmesg + .config on: http://bugsplatter.mine.nu/test/boxen/deltree/

-- 
Thanks,
Grant.
http://bugsplatter.mine.nu/
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