Hi Matthias,
Your results are interesting. How did you get OpenCL to work on Knights
landing? Would this work on older Xeon Phi cards?
Regards,
Benson
On 06/28/2017 04:03 PM, Matthias Noack wrote:
Hi all,
the following talk from IWOCL'17 has some numbers on PoCL on Xeon
(HSW), and Xeon Phi (KNL) for two applications using PoCL and other SDKs:
http://www.iwocl.org/wp-content/uploads/iwocl2017_matthias-noack-good-bad-ugly.pdf
The numbers for the comet simulation (slide 18, pdf 53), show some
weird outliers every 32 work-items, when increasing the overall number
of work-items (particles).
The HEOM code reveals a large performance gap in comparison with the
Intel SDK on KNL, while is looks quite competitive on HSW. This is
especially strange, as the Intel SDK has only AVX2 support, while PoCL
should be able to generate AVX-512 code using LLVM. I compiled PoCL
and LLVM on the target architectures, and made sure the result is an
actual Haswell and KNL built.
Is anyone interested in working on improving these issues?
Thanks,
Matthias
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Hajussüsteemide Teadur
Arvutiteaduse Instituut
Tartu Ülikool
J. Liivi 2, 50409
Tartu
http://kodu.ut.ee/~benson
----
Research Fellow of Distributed Systems
Institute of Computer Science
University of Tartu
J. Liivi 2 50409
Tartu, Estonia
http://kodu.ut.ee/~benson
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