Optimizing the Performance of SPEC MPI with Skylake and Omni-Path

Optimizing the Performance of SPEC MPI with Skylake and Omn-Path

Optimizing the Performance of SPEC MPI with Skylake and Omn-Path

Tuning the Eager threshold has a significant impact on application performance by avoiding the synchronization of rendezvous protocol and thus yielding better communication computation overlap.

Library Version: MVAPICH2 2.3rc1

Runtime Flags:

milcMV2_SMP_EAGERSIZE=256000
leslie3dNone
pop2None
lammpsMV2_SMP_EAGERSIZE=1024000
wrf2MV2_SMP_EAGERSIZE=128000
GAPgeofemNone
tera_tfMV2_SMP_EAGERSIZE=128000
luMV2_SMP_EAGERSIZE=1024000

System Details:

CPU Model Intel Xeon Platinum 8160
CPU Core Info 2 x 24 @ 2.1 GHz
IB Card 100Gb/sec Intel Omni-Path (OPA)
IB Switch Full Fat Tree 100Gb/sec Intel Omni-Path with 6 core switches

Tags: MILC SpecMPI Parallel Ocean Program 2 (pop2) LAMMPS Molecular Dynamics Simulator WRF2 GAPgeofem TERA_TF LU


Submitted by Amit Ruhela @ OSU

Last Modified March 6, 2018, 1:53 p.m.