Dot Product
From WaterWiki
[edit] Performance Results for Dot Product Benchmark on BG/P and Cray XT5
|
On IBM BG/P |
|||
|
Cores |
MPI_Alleduce_sync |
MPI_Allreduce |
Computation time |
|
16380 |
9.67 |
1.61 |
869.61 |
|
32760 |
9.74 |
1.61 |
869.34 |
|
65532 |
9.64 |
1.68 |
869.75 |
|
98304 |
8.2 |
1.75 |
869.28 |
|
On Cray XT5 |
WL-1 |
||
|
Cores |
MPI_Alleduce_sync |
MPI_Allreduce |
Computation time |
|
16380 |
91.82 |
93.13 |
103.36 |
|
32760 |
77.96 |
56.74 |
104.87 |
|
65532 |
556.2 |
558.56 |
103.31 |
|
98304 |
836.01 |
850.58 |
103.32 |
|
On Cray XT5 |
WL-8 |
||
|
Cores |
MPI_Alleduce_sync |
MPI_Allreduce |
Computation time |
|
16380 |
170.98 |
167.92 |
826.5 |
|
32760 |
166.71 |
97.44 |
838.64 |
|
65532 |
245.84 |
123.27 |
826.18 |
|
98304 |
362.86 |
192.59 |
826.26 |
|
On Cray XT5 |
WL-1 (using huge (2 MB) pages) |
||
|
Cores |
MPI_Alleduce_syn |
MPI_Allreduce |
Computation time |
|
16380 |
46.39 |
34.84 |
49.62 |
|
32760 |
75.11 |
63.09 |
49.67 |
|
65532 |
157.77 |
179.74 |
49.63 |
|
98304 |
128.27 |
133.29 |
49.63 |
|
On Cray XT5 |
WL-8 (using huge (2 MB pages) |
||
|
Cores |
MPI_Alleduce_syn |
MPI_Allreduce |
Computation time |
|
16380 |
196.41 |
267.77 |
394.83 |
|
32760 |
166.15 |
108.54 |
397.12 |
|
65532 |
196.95 |
118.98 |
394.84 |
|
98304 |
312.58 |
329.54 |
394.83 |
