[Beowulf] SC13: the Limulus boxen appear ...
deadline at eadline.org
Mon Dec 9 09:36:22 PST 2013
> On 12/09/2013 12:11 PM, Douglas Eadline wrote:
>> Responding to my own post, I recently tested the i7 haswell variant
>> of our Limulus and was 1.7 GFLOPS short of 0.5 TFLOPS (498.3 GFLOPS)
>> running HPL. I suppose with a little more fussing I could find
>> 2 extra GFLOPS, but I'm impressed with what AVX2 with FMA can do,
>> at least for HPL, I have not checked anything else yet.
>> Latest results are here:
>> Has anyone else seen any similar big jumps in performance?
>> (of course compiler support is needed)
> Any source code mods for this? Did you use Intel or GCC compilers? Nice
No code mods, used Intel 13.1.3, MKL, Open MPI. Also running
kernel 3.12.2 for the Haswell support. It seemed with the newer
kernels I could use almost 92% of memory, older kernels (2.6.* kernels
seemed to limit at about 88%) Also, the best number, after properly sized,
came from rebooting everything and running with virgin page tables.
> Joseph Landman, Ph.D
> Founder and CEO
> Scalable Informatics, Inc.
> email: landman at scalableinformatics.com
> web : http://scalableinformatics.com
> twtr : @scalableinfo
> phone: +1 734 786 8423 x121
> cell : +1 734 612 4615
> Mailscanner: Clean
More information about the Beowulf