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

Q*8 MB

Q*2X bytes

Allgather, Allgatherv

(Q+1)*4 MB

(Q+1)*X bytes

Exchange

12 MB

3X bytes

All other MPI-1 benchmarks

8 MB

2X bytes

IMB-EXT

80 MB

2 max(X,OVERALL_VOL) bytes

IMB-IO

32 MB

3X bytes

Ialltoall, Ialltoall_pure

Q*8 MB

Q*2X bytes

Iallgather, Iallgatherv, Iallgather_pure, Iallgatherv_pure

(Q+1)*4 MB

(Q+1)*X bytes

All other IMB-NBC benchmarks

8 MB

2X bytes

Compare_and_swap

12 B

12 B

Exchange_put, Exchange_get

16 MB

4X bytes

All other IMB-RMA benchmarks

8 MB

2X 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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