Re: [Help-glpk] Performance decrease with more powerful com puter

[xypron . glpk]

Hello Patrik

did you use a single thread benchmark?

Best regards

Heinrich

Gesendet mit der kostenlosen GMX iPhone App

Am 01.02.13 um 16:49 schrieb Patrik Dufresne

> Hi Reginald,
>
>
>
> Here are the hardware specs i'm comparing.
>
>
>
> System 1
>
> Windows XP SP2
>
> Intel Core i5 650 @ 3.20GHz 4 MB Cache
>
> 3GiB DDR3 1066/1333
>
> CPU mark (according to cpubenchmark.net) : 3154
>
> Total computation time : 331 sec
>
>
>
> System 2
>
> Windows XP SP2, Windows 7 64bits, Debian 64bits
>
> Core i7 CPU M 620 @ 2.67GHz 4M Cache
>
> 4GiB DDR3 1066
>
> CPU mark (according to cpubenchmark.net) : 2718
>
> Total computation time : 114 secs
>
>
>
> System 3
>
> Windows XP SP2, Debian 64bits
>
> *Core 2 Duo CPU E6550 @ 2.33GHz **4 MB** Cache L2
>
> *4GiB DDR2 800
>
> CPU mark (according to cpubenchmark.net) : 1493
>
> Total computation time : 172 secs
>
>
>
> I didn't run the benchmark on the computer it self, but the different
>
> between the number is big enough to expect better performance from System
>
> no 1 then System no 3. The total computation time of the problem on
>
> different platform for the same computer are almost identical. (less then
>
> 0.5 sec different). It's safe to assume the platform doesn't have any
>
> impact on the performance.
>
>
>
> I'm using GLPK 4.47 on every platform. On Linux, I did compile it from
>
> source with default flags. For Windows, I pick the pre-compiled version
>
> provided by winglpk project.
>
>
>
> To solve the problem, I need to run GLPK multiple time sequentially. I may
>
> provide dump of every instance of the problem.
>
>
>
> Patrik Dufresne
>
>
>
> On Fri, Feb 1, 2013 at 10:23 AM, Reginald Beardsley <address@hidden>wrote:
>
>
>
> > Could you  provide a few details?
>
> >
>
> > System configurations you're comparing?  GLPK version?  Compile time
>
> > options specified?
>
> >
>
> > There are a huge number of possibilities.  Why do you think the computer
>
> > is "more powerful"?
>
> >
>
> > Reg
>
> >
>
> >
>
> >
>
> > --- On *Fri, 2/1/13, Patrik Dufresne <address@hidden>* wrote:
>
> >
>
> >
>
> > From: Patrik Dufresne <address@hidden>
>
> > Subject: [Help-glpk] Performance decrease with more powerful computer
>
> > To: "GLPK help" <address@hidden>
>
> > Date: Friday, February 1, 2013, 8:56 AM
>
> >
>
> >
>
> > Hi,
>
> >
> 
> > I'm using GLPK in one project and the time taken to compute is longer on a
>
> > more powerful computer. Does it make any sense to you ?
>
> >
>
> > I don't have any clues about how to debug it. I would really appreciate
>
> > tips to diagnose the problem.
>
> >
>
> > Patrik Dufresne
>
> >
>
> > -----Inline Attachment Follows-----
>
> >
>
> > _______________________________________________
>
> > Help-glpk mailing list
>
> > address@hidden <http://mc/address@hidden>
>
> > https://lists.gnu.org/mailman/listinfo/help-glpk
>
> >
>
> >
>
> > _______________________________________________
>
> > Help-glpk mailing list
>
> > address@hidden
>
> > https://lists.gnu.org/mailman/listinfo/help-glpk
>
> >
>
> >
>
> _______________________________________________
>
> Help-glpk mailing list
>
> address@hidden
>
> https://lists.gnu.org/mailman/listinfo/help-glpk