Performance Related Question

[Frederico Costa]

On 2013-02-27 22:27, Michael Ross wrote:
> If I read you right, you didn't ``make -jX buildworld'',
> with X being the number of processes to spawn,
> so you used just one core on either machine.
> 
> Buildworld does a lot of I/O, so disk speed is relevant.

Yes, i just made "make buildworld".

So i should use make -j2 on the S1(dual core) and -j4 on S2 
(2xdualcore)?

And it also makes sense what you say about the I/O.

i will start another to see the results.

Thanks

fred

> On Wed, 27 Feb 2013 23:05:44 +0100, Frederico Costa
> <fredports at mufley.com>  wrote:
> 
>> Hi everyone...
>> 
>> I have a kind of interesting question when comes to performance of
>> FreeBSD in different HW. i am not trying to come up with a scientific
>> reason for measuring performance. :-)
>> 
>> It is just a curiosity, and of course to see if i understand it and
>> improve performance of my systems.
>> 
>> i am running 2 systems at the moment, lets call them S1 and S2,
>> running FreeBSD 9.1-RELEASE-p1 amd64:
>> 
>> S1:
>> Intel Core2 Duo E6550 @ 2.33GHz
>> 2GB RAM
>> 500GB disk (not important probably just for reference)
>> 
>> S2:
>> 2x Dual-Core AMD Opteron 2216 2.4GHz
>> 14GB Ram
>> 320GB disk (not important probably just for reference)
>> 
>> Both the systems are running more or less the same sw, apache, imap
>> server, postfix, and the needed perl/php/python and running very 
>> light
>>   load. Also both are using a GENERIC kernel and not running X, they 
>> are
>> just text based :-)
>> 
>>  From cpubenchmark.net the cpu performance index are for s1: 1501 and
>> s2: 1518, so very similar.
>> 
>> As i felt the AMD system seemed slower when comes to compiling, i 
>> just
>> done a "performance test" which was "make buildworld" on both of
>> systems from scratch and the times are:
>> 
>> S1: 2h 12m
>> S2: 2h 59m
>> 
> 
> If I read you right, you didn't ``make -jX buildworld'',
> with X being the number of processes to spawn,
> so you used just one core on either machine.
> 
> Buildworld does a lot of I/O, so disk speed is relevant.
> 
> 
> Regards,
> 
> Michael