[Users] Finding performance bottleneck in OFED stack?

[John Keenleyside]

If you use oprofile or the new Linux perf tool you should be able to get a 
break down of cpu cycles spent in the application, each shared library, 
kernel and each kernel module.

John Keenleyside





From:
Jingcha Joba <pukkimonkey at gmail.com>
To:
Ira Weiny <weiny2 at llnl.gov>
Cc:
"users at lists.openfabrics.org" <users at lists.openfabrics.org>
Date:
08/30/2012 02:00 AM
Subject:
Re: [Users] Finding performance bottleneck in OFED stack?
Sent by:
users-bounces at lists.openfabrics.org



Hi Ira,
 
Thanks fo the response.
I guess I wasnt clear with my question. What I meant was tools to find 
performance bottlenecks: like Vtune,TAU, Scalasca, or even gprof, etc, 
etc.
 
Unfortunately, the tools that I know are good for user level application 
specific to a particular language(s) or communication protocol (MPI...). I 
am not aware of any tool that could be used for "low level" performance 
analysis.
 
In short, I am more interested in finding out which layer of OFED stack is 
consuming how much percentage of execution time and why.
 
Thanks,
--
J Joba
On Wed, Aug 29, 2012 at 9:35 PM, Ira Weiny <weiny2 at llnl.gov> wrote:
rdma_bw and others in the perftest package for point to point.

As for IPoIB we use the standard iperf/netperf tools.

Beyond those "low level" tools we use MPI or lnet self test (Lustre) to 
test performance on a larger scale.

Ira

On Wed, 29 Aug 2012 18:29:09 -0700
Jingcha Joba <pukkimonkey at gmail.com> wrote:

> Hello All,
>
> I am just wondering if there are any tools out there that are used by 
the users/developers to find performance bottlenecks in OFED stack + the 
driver (both user / kernel) for both Windows and Linux machines?
>
> --
> J Joba
>
>
>
> _______________________________________________
> Users mailing list
> Users at lists.openfabrics.org
> http://lists.openfabrics.org/cgi-bin/mailman/listinfo/users


--
Ira Weiny
Member of Technical Staff
Lawrence Livermore National Lab
925-423-8008
weiny2 at llnl.gov
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