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42a5fa8d02
Summary:
Together with the previous patch, it's an -90% improvement,
or roughly -96% improvement if you look starting with rL347204
```
$ perf stat -r 9 ./bin/llvm-exegesis -mode=analysis -analysis-epsilon=1.0 -benchmarks-file=/tmp/benchmarks-inverse_throughput-onefull.yaml -analysis-clusters-output-file="" -analysis-inconsistencies-output-file=/tmp/clusters-bew.html
no exegesis target for x86_64-unknown-linux-gnu, using default
Parsed 14656 benchmark points
Printing sched class consistency analysis results to file '/tmp/clusters-bew.html'
...
no exegesis target for x86_64-unknown-linux-gnu, using default
Parsed 14656 benchmark points
Printing sched class consistency analysis results to file '/tmp/clusters-bew.html'
Performance counter stats for './bin/llvm-exegesis -mode=analysis -analysis-epsilon=1.0 -benchmarks-file=/tmp/benchmarks-inverse_throughput-onefull.yaml -analysis-clusters-output-file= -analysis-inconsistencies-output-file=/tmp/clusters-bew.html' (9 runs):
1483.18 msec task-clock # 0.999 CPUs utilized ( +- 0.10% )
68 context-switches # 46.085 M/sec ( +- 22.62% )
0 cpu-migrations # 0.000 K/sec
11641 page-faults # 7850.880 M/sec ( +- 0.62% )
5943246799 cycles # 4008184.428 GHz ( +- 0.10% ) (83.28%)
442869514 stalled-cycles-frontend # 7.45% frontend cycles idle ( +- 0.41% ) (83.29%)
1443375663 stalled-cycles-backend # 24.29% backend cycles idle ( +- 0.47% ) (33.43%)
7714006752 instructions # 1.30 insn per cycle
# 0.19 stalled cycles per insn ( +- 0.07% ) (50.17%)
1977242936 branches # 1333472193.855 M/sec ( +- 0.07% ) (66.79%)
32624220 branch-misses # 1.65% of all branches ( +- 0.18% ) (83.34%)
1.48438 +- 0.00143 seconds time elapsed ( +- 0.10% )
```
```
$ perf stat -r 9 ./bin/llvm-exegesis -mode=analysis -analysis-epsilon=1.0 -benchmarks-file=/tmp/benchmarks-inverse_throughput-onefull.yaml -analysis-clusters-output-file="" -analysis-inconsistencies-output-file=/tmp/clusters-newer.html
no exegesis target for x86_64-unknown-linux-gnu, using default
Parsed 14656 benchmark points
Printing sched class consistency analysis results to file '/tmp/clusters-newer.html'
...
no exegesis target for x86_64-unknown-linux-gnu, using default
Parsed 14656 benchmark points
Printing sched class consistency analysis results to file '/tmp/clusters-newer.html'
Performance counter stats for './bin/llvm-exegesis -mode=analysis -analysis-epsilon=1.0 -benchmarks-file=/tmp/benchmarks-inverse_throughput-onefull.yaml -analysis-clusters-output-file= -analysis-inconsistencies-output-file=/tmp/clusters-newer.html' (9 runs):
963.28 msec task-clock # 0.999 CPUs utilized ( +- 0.37% )
12 context-switches # 12.695 M/sec ( +- 52.79% )
0 cpu-migrations # 0.000 K/sec
11599 page-faults # 12046.971 M/sec ( +- 0.59% )
3860122322 cycles # 4009359.596 GHz ( +- 0.37% ) (83.19%)
380300669 stalled-cycles-frontend # 9.85% frontend cycles idle ( +- 0.34% ) (83.30%)
1071910340 stalled-cycles-backend # 27.77% backend cycles idle ( +- 1.30% ) (33.51%)
4773418224 instructions # 1.24 insn per cycle
# 0.22 stalled cycles per insn ( +- 0.15% ) (50.17%)
1106990316 branches # 1149787979.919 M/sec ( +- 0.11% ) (66.80%)
23632231 branch-misses # 2.13% of all branches ( +- 0.18% ) (83.33%)
0.96389 +- 0.00356 seconds time elapsed ( +- 0.37% )
```
```
$ sha512sum /tmp/clusters-*
db4bbd904fe8840853b589b032c5041bc060b91bcd9c27b914b56581fbc473550eea74b852238c79963b5adf2419f379e9f5db76784048b48e3937f9f3e732bf /tmp/clusters-bew.html
db4bbd904fe8840853b589b032c5041bc060b91bcd9c27b914b56581fbc473550eea74b852238c79963b5adf2419f379e9f5db76784048b48e3937f9f3e732bf /tmp/clusters-newer.html
db4bbd904fe8840853b589b032c5041bc060b91bcd9c27b914b56581fbc473550eea74b852238c79963b5adf2419f379e9f5db76784048b48e3937f9f3e732bf /tmp/clusters-old.html
```
Reviewers: courbet, gchatelet
Reviewed By: courbet
Subscribers: tschuett, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D57658
llvm-svn: 353025
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