Re: 2.6 vs 2.4, ssh terminal slowdown

[Grant Coady]

On Wed, 8 Feb 2006 13:35:18 +1100, Con Kolivas <kernel@xxxxxxxxxxx> wrote:

>On Wed, 8 Feb 2006 01:11 pm, Grant Coady wrote:
>> Hi there,
>>
>> grant@deltree:~$ uname -r
>> 2.6.15.3a
>> grant@deltree:~$ time grep -v 192\.168\. /var/log/apache/access_log| cut
>> -c-95 ...
>> 2006-02-08 12:38:13 +1100: bugsplatter.mine.nu 193.196.182.215 "GET
>> /test/linux-2.6/tosh/ HTTP/
>>
>> real    0m8.537s
>> user    0m0.970s
>> sys     0m1.100s
>>
>> --> reboot to 2.4.32-hf32.2
>>
>> grant@deltree:~$ uname -r
>> 2.4.32-hf32.2
>> grant@deltree:~$ time grep -v 192\.168\. /var/log/apache/access_log| cut
>> -c-95 ...
>> 2006-02-08 12:38:13 +1100: bugsplatter.mine.nu 193.196.182.215 "GET
>> /test/linux-2.6/tosh/ HTTP/
>>
>> real    0m2.271s
>> user    0m0.730s
>> sys     0m0.540s
>>
>> Still a 4:1 slowdown, machine .config and dmesg info:
>>   http://bugsplatter.mine.nu/test/boxen/deltree/
>
>What happens if you add "| cat" on the end of your command?

It gets faster with 2.4.32-hf32.2 by a little bit (I forgot to copy)

reboot to 2.6.15.3a, without...

real    0m8.737s
user    0m1.030s
sys     0m1.200s

with...  oh shit / surprise!!

real    0m1.861s
user    0m0.560s
sys     0m0.370s

What is that telling me / you / us?

Thanks,
Grant
>
>Cheers,
>Con

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