tree 9ffafad5deb6d6a2d74722af63219fe9dd9eafb9
parent 41672dff8cc894cdcb4e6ce3ed6bc0bfd74b3aaa
author Dmitriy Korchemkin <dmitriy.korchemkin@gmail.com> 1695848933 +0000
committer Dmitriy Korchemkin <dmitriy.korchemkin@gmail.com> 1695935486 +0000

Parallelize PSE preconditioner

Parallelization of remaining block-diagonal matrix-vector product and
vector operations makes parallel execution slightly faster

Before (Intel 8176 CPU, 10 iterations):
-----------------------------------------------------------------------
Benchmark                                                          Time
-----------------------------------------------------------------------
PSEPreconditioner...<problem-13682-4456117-pre.txt>/1_median   26677 ms
PSEPreconditioner...<problem-13682-4456117-pre.txt>/1_stddev    26.6 ms
PSEPreconditioner...<problem-13682-4456117-pre.txt>/2_median   31037 ms
PSEPreconditioner...<problem-13682-4456117-pre.txt>/2_stddev     191 ms
PSEPreconditioner...<problem-13682-4456117-pre.txt>/4_median   16915 ms
PSEPreconditioner...<problem-13682-4456117-pre.txt>/4_stddev    98.0 ms
PSEPreconditioner...<problem-13682-4456117-pre.txt>/8_median    9175 ms
PSEPreconditioner...<problem-13682-4456117-pre.txt>/8_stddev    44.1 ms
PSEPreconditioner...<problem-13682-4456117-pre.txt>/16_median   4974 ms
PSEPreconditioner...<problem-13682-4456117-pre.txt>/16_stddev   11.5 ms

After:
-----------------------------------------------------------------------
Benchmark                                                          Time
-----------------------------------------------------------------------
PSEPreconditioner...<problem-13682-4456117-pre.txt>/1_median   26609 ms
PSEPreconditioner...<problem-13682-4456117-pre.txt>/1_stddev    69.4 ms
PSEPreconditioner...<problem-13682-4456117-pre.txt>/2_median   29178 ms
PSEPreconditioner...<problem-13682-4456117-pre.txt>/2_stddev     367 ms
PSEPreconditioner...<problem-13682-4456117-pre.txt>/4_median   16152 ms
PSEPreconditioner...<problem-13682-4456117-pre.txt>/4_stddev     106 ms
PSEPreconditioner...<problem-13682-4456117-pre.txt>/8_median    8773 ms
PSEPreconditioner...<problem-13682-4456117-pre.txt>/8_stddev    41.5 ms
PSEPreconditioner...<problem-13682-4456117-pre.txt>/16_median   4800 ms
PSEPreconditioner...<problem-13682-4456117-pre.txt>/16_stddev   14.7 ms

Change-Id: Ib1d1b0c4edf9c556a9e996c49486d2726efcc558