Memory and Disk Space Requirements

The table below lists memory requirements for benchmarks run with the default settings (standard mode) and with the user-defined settings (optional mode). In this table:

Benchmarks

Standard Mode

Optional Mode

Alltoall

Qx8 MB

Qx2X bytes

Allgather, Allgatherv

(Q+1)x4 MB

(Q+1)xX bytes

Exchange

12 MB

3X bytes

All other MPI-1 benchmarks

8 MB

2X bytes

IMB-EXT

80 Mbytes

2 max(X,OVERALL_VOL) bytes

IMB-IO

32 Mbytes

3X bytes

NOTE:

If you do not select the -cache flag, add 2X cache size to all of the above.

For IMB-IO benchmarks, make sure you have enough disk space available:

For instructions on enabling the optional mode, see Parameters Controlling IntelĀ® MPI Benchmarks.

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