• 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
• For the Amber application, tuning results in 19% improvement at 256 processes
• Batch script: Amber Eager
• Input files
  • Small: MDIN
  • Large: PMTOP

Library Version: MVAPICH2 2.2b

Runtime Flags: MV2_IBA_EAGER_THRESHOLD=131072 MV2_VBUF_TOTAL_SIZE=131072

System Details:

Tags: Amber

Submitted by Dong Ju Choi @ UCSD

Last Modified March 24, 2016, 4:31 p.m.