[petsc-users] Make stream

Tue Jun 9 15:43:31 CDT 2020

Hi All,

I am trying to interpret the results from "make stream" on two compute
nodes, where each node has 48 cores.

If my calculations are memory bandwidth limited, such as AMG, MatVec,
GMRES, etc..
The best speedup I could get is 16.6938 if I start from one core?? The
speedup for function evaluations and Jacobian evaluations can be better
than16.6938?

Thanks,

Fande,

Running streams with 'mpiexec ' using 'NPMAX=96'
1 19412.4570  Rate (MB/s)
2 29457.3988  Rate (MB/s) 1.51744
3 40483.9318  Rate (MB/s) 2.08546
4 51429.3431  Rate (MB/s) 2.64929
5 59849.5168  Rate (MB/s) 3.08304
6 66124.3461  Rate (MB/s) 3.40628
7 70888.1170  Rate (MB/s) 3.65167
8 73436.2374  Rate (MB/s) 3.78294
9 77441.7622  Rate (MB/s) 3.98927
10 78115.3114  Rate (MB/s) 4.02397
11 81449.3315  Rate (MB/s) 4.19572
12 82812.3471  Rate (MB/s) 4.26593
13 81442.2114  Rate (MB/s) 4.19535
14 83404.1657  Rate (MB/s) 4.29642
15 84165.8536  Rate (MB/s) 4.33565
16 83739.2910  Rate (MB/s) 4.31368
17 83724.8109  Rate (MB/s) 4.31293
18 83225.0743  Rate (MB/s) 4.28719
19 81668.2002  Rate (MB/s) 4.20699
20 83678.8007  Rate (MB/s) 4.31056
21 81400.4590  Rate (MB/s) 4.1932
22 81944.8975  Rate (MB/s) 4.22124
23 81359.8615  Rate (MB/s) 4.19111
24 80674.5064  Rate (MB/s) 4.1558
25 83761.3316  Rate (MB/s) 4.31481
26 87567.4876  Rate (MB/s) 4.51088
27 89605.4435  Rate (MB/s) 4.61586
28 94984.9755  Rate (MB/s) 4.89298
29 98260.5283  Rate (MB/s) 5.06171
30 99852.8790  Rate (MB/s) 5.14374
31 102736.3576  Rate (MB/s) 5.29228
32 108638.7488  Rate (MB/s) 5.59633
33 110431.2938  Rate (MB/s) 5.68867
34 112824.2031  Rate (MB/s) 5.81194
35 116908.3009  Rate (MB/s) 6.02232
36 121312.6574  Rate (MB/s) 6.2492
37 122507.3172  Rate (MB/s) 6.31074
38 127456.2504  Rate (MB/s) 6.56568
39 130098.7056  Rate (MB/s) 6.7018
40 134956.4461  Rate (MB/s) 6.95204
41 138309.2465  Rate (MB/s) 7.12475
42 141779.7997  Rate (MB/s) 7.30353
43 145653.3687  Rate (MB/s) 7.50307
44 149131.2087  Rate (MB/s) 7.68223
45 151611.6104  Rate (MB/s) 7.81
46 155554.6394  Rate (MB/s) 8.01312
47 159033.1938  Rate (MB/s) 8.19231
48 162216.5600  Rate (MB/s) 8.35629
49 165034.8116  Rate (MB/s) 8.50147
50 168001.4823  Rate (MB/s) 8.65429
51 170899.9045  Rate (MB/s) 8.8036
52 175687.8033  Rate (MB/s) 9.05024
53 178203.9203  Rate (MB/s) 9.17985
54 179973.3914  Rate (MB/s) 9.27101
55 182207.3495  Rate (MB/s) 9.38608
56 185712.9643  Rate (MB/s) 9.56667
57 188805.5696  Rate (MB/s) 9.72598
58 193360.9158  Rate (MB/s) 9.96064
59 198160.8016  Rate (MB/s) 10.2079
60 201297.0129  Rate (MB/s) 10.3695
61 203618.7672  Rate (MB/s) 10.4891
62 209599.2783  Rate (MB/s) 10.7971
63 211651.1587  Rate (MB/s) 10.9028
64 210254.5035  Rate (MB/s) 10.8309
65 218576.4938  Rate (MB/s) 11.2596
66 220280.0853  Rate (MB/s) 11.3473
67 221281.1867  Rate (MB/s) 11.3989
68 228941.1872  Rate (MB/s) 11.7935
69 232206.2708  Rate (MB/s) 11.9617
70 233569.5866  Rate (MB/s) 12.0319
71 238293.6355  Rate (MB/s) 12.2753
72 238987.0729  Rate (MB/s) 12.311
73 246013.4684  Rate (MB/s) 12.6729
74 248850.8942  Rate (MB/s) 12.8191
75 249355.6899  Rate (MB/s) 12.8451
76 252515.6110  Rate (MB/s) 13.0079
77 257489.4268  Rate (MB/s) 13.2641
78 260884.2771  Rate (MB/s) 13.439
79 264341.8661  Rate (MB/s) 13.6171
80 269329.1376  Rate (MB/s) 13.874
81 272286.4070  Rate (MB/s) 14.0263
82 273325.7822  Rate (MB/s) 14.0799
83 277334.6699  Rate (MB/s) 14.2864
84 280254.7286  Rate (MB/s) 14.4368
85 282219.8194  Rate (MB/s) 14.538
86 289039.2677  Rate (MB/s) 14.8893
87 291234.4715  Rate (MB/s) 15.0024
88 295941.1159  Rate (MB/s) 15.2449
89 298136.3163  Rate (MB/s) 15.358
90 302820.9080  Rate (MB/s) 15.5993
91 306387.5008  Rate (MB/s) 15.783
92 310127.0223  Rate (MB/s) 15.9756
93 310219.3643  Rate (MB/s) 15.9804
94 317089.5971  Rate (MB/s) 16.3343
95 315457.0938  Rate (MB/s) 16.2502
96 324068.8172  Rate (MB/s) 16.6938
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20200609/78fde9ac/attachment.html>