On Thu, Jan 18, 2007 at 03:10:15PM +0200, Gleb Natapov wrote:
>On Thu, Jan 18, 2007 at 07:17:13AM -0500, Robin Humble wrote:
>> On Thu, Jan 18, 2007 at 11:08:04AM +0200, Gleb Natapov wrote:
>> >On Thu, Jan 18, 2007 at 03:52:19AM -0500, Robin Humble wrote:
>> >> On Wed, Jan 17, 2007 at 08:55:31AM -0
On Jan 18, 2007, at 8:11 AM, Peter Kjellstrom wrote:
with Lustre, which is about 55% of the
theoretical 20 Gb/s advertised speed.
I think this should be calculated against 16 Gbps, not 20 Gbps.
What is the advertised speed of a IB DDR card?
http://mellanox.com/products/hca_cards.php
http://
On Thursday 18 January 2007 13:08, Scott Atchley wrote:
...
> The best uni-directional performance I have heard of for PCIe 8x IB
> DDR is ~1,400 MB/s (11.2 Gb/s)
This is on par with what I have seen.
> with Lustre, which is about 55% of the
> theoretical 20 Gb/s advertised speed.
I think this
On Thu, Jan 18, 2007 at 07:17:13AM -0500, Robin Humble wrote:
> On Thu, Jan 18, 2007 at 11:08:04AM +0200, Gleb Natapov wrote:
> >On Thu, Jan 18, 2007 at 03:52:19AM -0500, Robin Humble wrote:
> >> On Wed, Jan 17, 2007 at 08:55:31AM -0700, Brian W. Barrett wrote:
> >> >On Jan 17, 2007, at 2:39 AM, Gl
On Thu, Jan 18, 2007 at 11:08:04AM +0200, Gleb Natapov wrote:
>On Thu, Jan 18, 2007 at 03:52:19AM -0500, Robin Humble wrote:
>> On Wed, Jan 17, 2007 at 08:55:31AM -0700, Brian W. Barrett wrote:
>> >On Jan 17, 2007, at 2:39 AM, Gleb Natapov wrote:
>> >> On Wed, Jan 17, 2007 at 04:12:10AM -0500, Robi
On Jan 18, 2007, at 5:05 AM, Peter Kjellstrom wrote:
On Thursday 18 January 2007 09:52, Robin Humble wrote:
...
is ~10Gbit the best I can expect from 4x DDR IB with MPI?
some docs @HP suggest up to 16Gbit (data rate) should be possible,
and
I've heard that 13 or 14 has been achieved before.
On Thursday 18 January 2007 09:52, Robin Humble wrote:
...
> is ~10Gbit the best I can expect from 4x DDR IB with MPI?
> some docs @HP suggest up to 16Gbit (data rate) should be possible, and
> I've heard that 13 or 14 has been achieved before. but those might be
> verbs numbers, or maybe horsepowe
On Thu, Jan 18, 2007 at 03:52:19AM -0500, Robin Humble wrote:
> On Wed, Jan 17, 2007 at 08:55:31AM -0700, Brian W. Barrett wrote:
> >On Jan 17, 2007, at 2:39 AM, Gleb Natapov wrote:
> >> On Wed, Jan 17, 2007 at 04:12:10AM -0500, Robin Humble wrote:
> >>> basically I'm seeing wildly different bandwi
argh. attached.
cheers,
robin
On Thu, Jan 18, 2007 at 03:52:19AM -0500, Robin Humble wrote:
>On Wed, Jan 17, 2007 at 08:55:31AM -0700, Brian W. Barrett wrote:
>>On Jan 17, 2007, at 2:39 AM, Gleb Natapov wrote:
>>> On Wed, Jan 17, 2007 at 04:12:10AM -0500, Robin Humble wrote:
basically I'm s
On Wed, Jan 17, 2007 at 08:55:31AM -0700, Brian W. Barrett wrote:
>On Jan 17, 2007, at 2:39 AM, Gleb Natapov wrote:
>> On Wed, Jan 17, 2007 at 04:12:10AM -0500, Robin Humble wrote:
>>> basically I'm seeing wildly different bandwidths over InfiniBand 4x DDR
>>> when I use different kernels.
>> Try t
On Jan 17, 2007, at 2:39 AM, Gleb Natapov wrote:
Hi Robin,
On Wed, Jan 17, 2007 at 04:12:10AM -0500, Robin Humble wrote:
so this isn't really an OpenMPI questions (I don't think), but you
guys
will have hit the problem if anyone has...
basically I'm seeing wildly different bandwidths over
Hi Robin,
On Wed, Jan 17, 2007 at 04:12:10AM -0500, Robin Humble wrote:
>
> so this isn't really an OpenMPI questions (I don't think), but you guys
> will have hit the problem if anyone has...
>
> basically I'm seeing wildly different bandwidths over InfiniBand 4x DDR
> when I use different kern
so this isn't really an OpenMPI questions (I don't think), but you guys
will have hit the problem if anyone has...
basically I'm seeing wildly different bandwidths over InfiniBand 4x DDR
when I use different kernels.
I'm testing with netpipe-3.6.2's NPmpi, but a home-grown pingpong sees
the same
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