[Users] ET on KNL.

[David Radice]

Hello Eloisa,

sorry for the delay in the reply. For the records I did manage to compile and run ET on KNL (stampede), but I did not manage to run any benchmark with it yet. The current status is:

	* intel-17: the compiler fails to compile Carpet and either gives an internal error or segfaults.
	* gcc-6.3: used to compile and run with Erik's spack installation (it is currently broken). I did not really manage to benchmark it since even a low-resolution TOV test did not run to completion (meaning less than 4 coarse grid steps) within 30 minutes on 4 nodes.

This was using the current stable release of the ET (2016-11) and WhiskyTHC. You might have more luck with GRHydro / pure-vacuum runs.

Best wishes,

David

> On Feb 22, 2017, at 5:53 PM, Haas, Roland <rhaas at illinois.edu> wrote:
> 
> Hello Eloisa,
> 
> yup, widely off. David with Erik's help had a try at ET on KNL (stampede) and you can find some information here: https://docs.einsteintoolkit.org/et-docs/2017_MHD_Workshop
> 
> Yours,
> Roland
> 
> --
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> ________________________________________
> From: users-bounces at einsteintoolkit.org [users-bounces at einsteintoolkit.org] on behalf of Eloisa Bentivegna [eloisa.bentivegna at ct.infn.it]
> Sent: Wednesday, February 22, 2017 16:24
> To: Einstein Toolkit Users
> Subject: [Users] ET on KNL.
> 
> Dear all,
> 
> I was wondering if anybody is using the ET on the Knights Landing
> architecture, and what sort of performance one could expect to get.
> Admittedly without much optimization, I am measuring a performance per
> core which is almost two orders of magnitude smaller than that of a
> Broadwell Xeon. Does this sound wildly off?
> 
> Eloisa
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