Re: [AMBER] Intel Compilers, SSE_TYPES, and auto CPU dispatch

From: Daniel Roe <daniel.r.roe.gmail.com>
Date: Mon, 12 Jan 2015 18:44:32 -0700

Hi,

Personally, on clusters like that I usually just configure with the
'-nosse' flag to avoid the issue altogether.

-Dan

On Monday, January 12, 2015, Novosielski, Ryan <novosirj.ca.rutgers.edu>
wrote:

> Hi all,
>
> I recently ran into the following error at runtime:
>
> "Please verify that both the operating system and the processor support
> Intel(R) SSE4_2 and POPCNT instructions."
>
> The reason for this is that we have some nodes with Nehalem chipsets and
> some with Harpertown chipsets on our cluster, and the master node is a
> newer machine that supports some of the newer instructions. Looking through
> the —full-help configure option, I saw that I could define SSE_TYPES to say
> which CPU instructions should be supportable at runtime. However, I tried
> building with SSE types set to SSE4.2,SSE4.1 and the reverse even though I
> doubted that would make any difference. It appears as if it does add
> -axSSE4.2,SSE4.1 to the appropriate places during the build, which from my
> read of the Intel documentation is exactly what it should do. However, when
> built, the code behaves the same way with the same error messages on the
> Harpertown nodes. I don’t see a way to disable POPCNT, but it appears as if
> SSE4.1 machines don’t support it, so I would assume it is not used when the
> runtime dispatcher selects SSE4.1.
>
> I was not aware of auto CPU dispatch before today, so I’m not sure if I’m
> doing something wrong somehow. Amber version is 14, Intel compilers are
> 15.0.1.
>
>
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> || \\UTGERS |---------------------*O*---------------------
> ||_// Biomedical | Ryan Novosielski - Senior Technologist
> || \\ and Health | novosirj.rutgers.edu <javascript:;> - 973/972.0922
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-- 
-------------------------
Daniel R. Roe, PhD
Department of Medicinal Chemistry
University of Utah
30 South 2000 East, Room 307
Salt Lake City, UT 84112-5820
http://home.chpc.utah.edu/~cheatham/
(801) 587-9652
(801) 585-6208 (Fax)
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Received on Mon Jan 12 2015 - 18:00:02 PST
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