2 x quad-core system is slower that 2 x dual core on FreeBSD

[Ronald Klop]

On Mon, 19 Nov 2007 15:54:32 +0100, Alexey Popov <lol at chistydom.ru> wrote:

> Hi
>
> Robert Watson wrote:
>> FreeBSD 7 contains significant optimization for increased numbers of  
>> cores, and is where a lot of the work optimizing MySQL has ended up.  I  
>> see you're trying out a 6.3 beta, any chance you could try out a 7.0  
>> beta instead? Also, consider switching to "options SCHED_ULE" in the  
>> 7.0 kernel rather than "options SCHED_4BSD".
> I tried SCHED_ULE, but got no difference:
>
> last pid:  1063;  load averages: 22.75, 13.76,  6.31    up 0+00:07:24  
> 17:53:49
> 56 processes:  33 running, 23 sleeping
> CPU states: 26.5% user,  0.0% nice, 68.1% system,  0.3% interrupt,  5.1%  
> idle
> Mem: 365M Active, 20M Inact, 102M Wired, 664K Cache, 46M Buf, 3419M Free
> Swap: 2048M Total, 2048M Free
>
>    PID USERNAME   THR PRI NICE   SIZE    RES STATE  C   TIME   WCPU  
> COMMAND
>   1019 www          1 101    0   101M 51244K RUN    6   0:37 26.86% httpd
>   1040 www          1  -4    0 92476K 42956K RUN    1   0:36 26.76% httpd
>   1004 www          1  -4    0 92476K 42864K RUN    4   0:38 25.98% httpd
>   1018 www          1 101    0 91452K 41736K CPU3   3   0:37 25.68% httpd
>   1000 www          1 101    0 92476K 42544K RUN    0   0:36 25.29% httpd
>   1026 www          1 101    0 93500K 39900K CPU0   0   0:35 25.20% httpd
>   1021 www          1 101    0   101M 49432K RUN    4   0:37 25.10% httpd
>   1024 www          1 101    0 93500K 44416K RUN    5   0:37 25.10% httpd
>   1020 www          1 101    0 94524K 43684K RUN    0   0:37 25.00% httpd
>   1030 www          1 101    0 96576K 46004K RUN    3   0:36 25.00% httpd
>   1031 www          1 101    0   101M 50956K RUN    3   0:37 24.66% httpd
>   1025 www          1 101    0 94524K 43880K RUN    5   0:36 24.56% httpd
>   1041 www          1 101    0 92476K 41792K RUN    2   0:36 24.56% httpd
>   1022 www          1 101    0   101M 48932K RUN    5   0:36 24.27% httpd

You have a lot of free memory. Maybe you can wait a little to let it fill  
the cache or let it use more buf's. This could explain that the system is  
spending a lot if time in 'system'.

Ronald.

-- 
  Ronald Klop
  Amsterdam, The Netherlands