Tony Schreiner wrote:
>
> On Feb 18, 2008, at 11:52 AM, John Summerfield wrote:
>
>> Pedro Espinoza wrote:
>>> Hi Listers:
>>> The program appended below takes almost 9 minutes on RHEL 5, RHEL5.1,
>>> latest RHEL 4, Centos5.1. However, the same program takes 2m 15
>>> seconds on OPensuse 10.2 (2.6.18.8 kernel), and on Fedora 8. The box
>>> has 4 dual-core xeon processors, and with 8 GB memory.
>>> However, the same program takes 2min 45s on a box that has one
>>> dual-core opteron, with RHEL 4 ( 2.6.9-42.0.2.ELsmp SMP).
>>> Any pointers appreciated.
>>>
>> Seriously, how long to run eight of them at once?
>>
>> The number of CPUs and cores is irrelevant unless you're running
>> multiple threads/processes.
>>
>> I would speculate that F8 and opensuse 10.2 have newer gcc and that
>> that makes a significant difference.
>>
>> It might also be worth trying Intel's icc; I think for some purposes
>> it's free of charge.
>>
>> 01:47 [summer@(protected)
>> 01:48 [summer@(protected)
>>
>> real   0m10.719s
>> user   0m9.841s
>> sys   0m0.512s
>> 01:48 [summer@(protected) ~]$
>>
>> Pentium IV 3.00 Ghz, Scientific linux 5.
>>
>> --
>
> The poster ran the program with an argument of 20 (it makes a difference)
> Tony Schreiner

Good point. Hopefully I'm a little sharper now I've made some Zeds.
01:51 [summer@(protected)

real   6m2.003s
user   5m24.736s
sys   0m6.628s
07:49 [summer@(protected) ~]$





--

Cheers
John

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