[Linux-ia64] benchmarking results

[Linux-ia64] benchmarking results

[Adriano Galano]

Hello:

Someone could be provide SMP benchmarking results for 2-way to 8-way Itanium
2 systems?

best regards,

-Adriano

Re: [Linux-ia64] benchmarking results

[Duraid Madina]

You could do worse than look through

http://www.spec.org/cpu2000/results/rint2000.html

and

http://www.spec.org/cpu2000/results/rfp2000.html

	Duraid


Adriano Galano wrote:
> Hello:
> 
> Someone could be provide SMP benchmarking results for 2-way to 8-way Itanium
> 2 systems?
> 
> best regards,
> 
> -Adriano

Re: [Linux-ia64] benchmarking results

[David Mosberger]

>>>>> On Wed, 30 Apr 2003 12:54:12 +0200, "Adriano Galano" <adriano@satec.es> said:

  Adriano> Hello: Someone could be provide SMP benchmarking results
  Adriano> for 2-way to 8-way Itanium 2 systems?

A lot of performance information for 2-4 way is available at:

  http://www.hp.com/products1/itanium/performance/index.html

Note especially the links near the bottom of the pages: that's
where all the background & details are.

Also note that the results are for McKinley (as of July-September last
year, I think), so they don't cover Madison (aka Itanium 2 6M) or
larger (beyond 4-way) HP systems yets.

	--david

RE: [Linux-ia64] benchmarking results

[Adriano Galano]

Hi David and all:

>
> >>>>> On Wed, 30 Apr 2003 12:54:12 +0200, "Adriano Galano"
> <adriano@satec.es> said:
>
>   Adriano> Hello: Someone could be provide SMP benchmarking results
>   Adriano> for 2-way to 8-way Itanium 2 systems?
>
> A lot of performance information for 2-4 way is available at:
>
>   http://www.hp.com/products1/itanium/performance/index.html
>
> Note especially the links near the bottom of the pages: that's
> where all the background & details are.
>
> Also note that the results are for McKinley (as of July-September last
> year, I think), so they don't cover Madison (aka Itanium 2 6M) or
> larger (beyond 4-way) HP systems yets.
>

We need to find some reference of SMP scalability on Linux scheduler. For 1,
2, 4 and 8 processor. How "lineal" is this scalability? Does Linux perform
well en 4 or 8 Itanium 2 architecture? Somebody have experience of Linux
scalability for more than 4 Itanium 2 (or Madison) processors?

Regards,

-Adriano


> 	--david

RE: [Linux-ia64] benchmarking results

[David Mosberger]

>>>>> On Wed, 30 Apr 2003 18:17:45 +0200, "Adriano Galano" <adriano@satec.es> said:

  Adriano> We need to find some reference of SMP scalability on Linux
  Adriano> scheduler. For 1, 2, 4 and 8 processor. How "lineal" is
  Adriano> this scalability? Does Linux perform well en 4 or 8 Itanium
  Adriano> 2 architecture?

There is no single answer to the scalability question.  It totally
depends on what application you're running.  SGI has shown that
certain apps scale very nicely all the way to 64 CPUs on their Altix
box.  Kernel-intensive apps won't scale that far, but even there there
is some evendice of very nice scaling.  AFAIK, there is only a 4-way
TPC-C number published for Linux:

	rx5670 (4-way 1GHz Itanium 2):	80494 tpmC

but the URL here:

	http://www.hp.com/products1/itanium/performance/commercial/tpcc.html

shows a TPC of about 40600 for a 2-way machine (I believe it was
running Windows).  Given that the 4-way TPC-C number for Windows is in
the same 80k ballpark, it suggests that Linux scales almost linearly
for TPC-C.

  Adriano> Somebody have experience of Linux scalability for more than
  Adriano> 4 Itanium 2 (or Madison) processors?

NEC and SGI already are shipping large Itanium 2 machines.  Not sure
what benchmarks have been run on them with Linux, though.

As far as HP machines are concerned: it's probably best to get in
touch with a sales rep.  He or she should be able to get you more info
on forthcoming machines and perhaps could help you get the application
benchmarked.

	--david

Re: [Linux-ia64] benchmarking results

[Steve Neuner]

> >>>>> On Wed, 30 Apr 2003 18:17:45 +0200, "Adriano Galano" <adriano@satec.es> said:
> 
>   Adriano> We need to find some reference of SMP scalability on Linux
>   Adriano> scheduler. For 1, 2, 4 and 8 processor. How "lineal" is
>   Adriano> this scalability? Does Linux perform well en 4 or 8 Itanium
>   Adriano> 2 architecture?
> 
> David Mosberger wrote:
> There is no single answer to the scalability question.  It totally
> depends on what application you're running.  SGI has shown that
> certain apps scale very nicely all the way to 64 CPUs on their Altix
> box.  Kernel-intensive apps won't scale that far, but even there there
> is some evendice of very nice scaling.  ...

Hi Adriano,

As David points out, there's a lot of factors that can affect scalability
results for a particular workload.  If you haven't already, you might want 
to check out the following from the February 2003 issue of Linux Journal 
magazine: http://linuxjournal.com/article.php?sidd40, which provides more 
background on the SGI Altix system along with some scaling and benchmark results.

Hope that helps.

--steve

RE: [Linux-ia64] benchmarking results

[Adriano Galano]

Hi Steve:

> > >>>>> On Wed, 30 Apr 2003 18:17:45 +0200, "Adriano Galano"
> <adriano@satec.es> said:
> >
> >   Adriano> We need to find some reference of SMP
> scalability on Linux
> >   Adriano> scheduler. For 1, 2, 4 and 8 processor. How "lineal" is
> >   Adriano> this scalability? Does Linux perform well en 4
> or 8 Itanium
> >   Adriano> 2 architecture?
> >
> > David Mosberger wrote:
> > There is no single answer to the scalability question.  It totally
> > depends on what application you're running.  SGI has shown that
> > certain apps scale very nicely all the way to 64 CPUs on their Altix
> > box.  Kernel-intensive apps won't scale that far, but even
> there there
> > is some evendice of very nice scaling.  ...
>
> Hi Adriano,
>
> As David points out, there's a lot of factors that can affect
> scalability
> results for a particular workload.  If you haven't already,
> you might want
> to check out the following from the February 2003 issue of
> Linux Journal
> magazine: http://linuxjournal.com/article.php?sidd40, which
> provides more
> background on the SGI Altix system along with some scaling
> and benchmark results.
>

Thanks for the reference.

Maybe in all the cases I can see NUMA architectures and not find references
related to what kind of scheduler was used older sched, O(1) or HT? The
limits of the bricks for SMP are 4 proc, how could I assume linear
scalability for 8 proc having memory latency accesing the others bricks
through R-Brick maybe?

Regards,

-Adriano

> Hope that helps.
>
> --steve

Re: [Linux-ia64] benchmarking results

[Steve Neuner]

> Maybe in all the cases I can see NUMA architectures and not find references
> related to what kind of scheduler was used older sched, O(1) or HT? 

Hi Adriano,

On the SGI Altix system we've been getting good results with the
O(1) scheduler.  

> The limits of the bricks for SMP are 4 proc, how could I assume linear
> scalability for 8 proc having memory latency accesing the others bricks
> through R-Brick maybe?

There are many factors that can affect getting good "scalability" beyond
8p (e.g., hardware design, kernel scalability, user v. kernel workload, 
user app scalability, I/O subsystem, etc) -- having a good hardware design 
with a fast system interconnect is essential.

--steve