mboehm7 commented on pull request #1481:
URL: https://github.com/apache/systemds/pull/1481#issuecomment-1003422103
great to see the progress here - out of curiosity I ran the PCA scenario on
one of our small scale-out nodes, and here are the stats (it's not an issue of
TSMM but only Eigen):
```
Total elapsed time: 112.377 sec.
Total compilation time: 1.758 sec.
Total execution time: 110.619 sec.
Number of compiled Spark inst: 7.
Number of executed Spark inst: 0.
Cache hits (Mem/Li/WB/FS/HDFS): 43/0/0/0/0.
Cache writes (Li/WB/FS/HDFS): 3/14/0/2.
Cache times (ACQr/m, RLS, EXP): 0.001/0.001/0.006/4.679 sec.
HOP DAGs recompiled (PRED, SB): 0/3.
HOP DAGs recompile time: 0.005 sec.
Spark ctx create time (lazy): 0.000 sec.
Spark trans counts (par,bc,col):0/0/0.
Spark trans times (par,bc,col): 0.000/0.000/0.000 secs.
Total JIT compile time: 4.689 sec.
Total JVM GC count: 4.
Total JVM GC time: 0.15 sec.
Heavy hitter instructions:
# Instruction Time(s) Count
1 m_pca 105.247 1
2 eigen 103.240 1
3 write 4.679 2
4 ba+* 0.989 2
5 tsmm 0.455 1
6 / 0.302 5
7 rand 0.287 8
8 + 0.233 10
9 uacmean 0.136 1
10 leftIndex 0.133 3
```
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