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Re: [charm] [ppl] Unable to run charm++ on infiniband interface


Chronological Thread 
  • From: Michel Espinoza-Fonseca <mef AT ddt.biochem.umn.edu>
  • To: Phil Miller <mille121 AT illinois.edu>
  • Cc: "charm AT cs.illinois.edu" <charm AT cs.illinois.edu>
  • Subject: Re: [charm] [ppl] Unable to run charm++ on infiniband interface
  • Date: Wed, 8 Aug 2012 13:24:29 -0500
  • Accept-language: en-US
  • Acceptlanguage: en-US
  • List-archive: <http://lists.cs.uiuc.edu/pipermail/charm>
  • List-id: CHARM parallel programming system <charm.cs.uiuc.edu>
Hi Phil,

Thank you for your response. It seems I forgot to mention that the build I'm
using is ibverbs-smp, still poor scalability.

Michel



On Aug 8, 2012, at 8:23 PM, "Phil Miller"
<mille121 AT illinois.edu>
wrote:

> On Wed, Aug 8, 2012 at 12:04 PM, Michel Espinoza-Fonseca
> <mef AT ddt.biochem.umn.edu>
> wrote:
>> Interestingly, I also tried the SMP build which seems to work fine when
>> "++ppn" is added to the command line, although NAMD scales poorly compared
>> to the ibverbs build.
>
> As for this observation, to benefit from SMP, you'll want to build
> Charm++ with the smp and ibverbs options, so that it still uses the
> low-latency infiniband interconnect hardware.



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