This CL adds two tools
* A dill extractor tool which extracts the source files inside the dill
to a new directory, trying to recrease the package config too so the
sources can be compiled again. Thought as being useful for doing
benchmarks between the CFE and the analyzer to make sure they look at
the exact same source files. No more. No less.
* A CFE compile entry point that compiles all files in a directory.
Again thought as being useful to compare the CFE with the Analyzer.
Additionally it introduces "--gcs=<int>" to `benchmarker.dart` so it can
do multiple runs and do statistics on combined gc times.
Usage example:
```
$ out/ReleaseX64/dart pkg/front_end/tool/compile.dart pkg/front_end/tool/compile.dart
$ out/ReleaseX64/dart-sdk/bin/dart pkg/kernel/bin/dill_extractor.dart pkg/front_end/tool/compile.dart.dill /tmp/extracted_compile_dart_compile
Done. Wrote 687 source files.
$ out/ReleaseX64/dart-sdk/bin/dart compile aot-snapshot pkg/front_end/tool/compile_files_in_folders.dart
Generated: [...]/pkg/front_end/tool/compile_files_in_folders.aot
$ out/ReleaseX64/dart-sdk/bin/dart compile aot-snapshot pkg/analyzer_cli/bin/analyzer.dart
Generated: [...]/pkg/analyzer_cli/bin/analyzer.aot
$ time out/ReleaseX64/dart-sdk/bin/dartaotruntime pkg/front_end/tool/compile_files_in_folders.aot /tmp/extracted_compile_dart_compile/
Got 626 libraries.
Finished in 0:00:03.496817
real 0m3.530s
user 0m4.985s
sys 0m0.257s
$ time out/ReleaseX64/dart-sdk/bin/dartaotruntime pkg/analyzer_cli/bin/analyzer.aot /tmp/extracted_compile_dart_compile/
Analyzing /tmp/extracted_compile_dart_compile...
warning • Target of URI doesn't exist: 'package:compiler/src/io/source_file.dart'. • package:_fe_analyzer_shared/src/scanner/utf8_bytes_scanner.dart:5:16 • uri_does_not_exist_in_doc_import
1 warning found.
real 0m8.479s
user 0m9.997s
sys 0m1.048s
$ out/ReleaseX64/dart pkg/front_end/tool/benchmarker.dart --silent --iterations=10 --gcs=5 --snapshot=pkg/front_end/tool/compile_files_in_folders.aot --snapshot=pkg/analyzer_cli/bin/analyzer.aot --arguments="/tmp/extracted_compile_dart_compile/"
Will now run 10 iterations with 2 snapshots.
..............................
Comparing snapshot #1 (compile_files_in_folders.aot) with snapshot #2 (analyzer.aot)
msec task-clock:u: 141.1012% +/- 1.5550% (6281.55 +/- 69.22) (4451.81 -> 10733.36)
page-faults:u: 47.5414% +/- 0.7786% (45602.90 +/- 746.84) (95922.50 -> 141525.40)
cycles:u: 119.3182% +/- 1.5751% (22131655652.90 +/- 292155654.08) (18548436164.50 -> 40680091817.40)
instructions:u: 140.2463% +/- 0.0340% (30410953910.60 +/- 7375789.67) (21683959961.20 -> 52094913871.80)
branch-misses:u: 97.9816% +/- 7.3049% (73071988.00 +/- 5447773.30) (74577266.40 -> 147649254.40)
seconds time elapsed: 141.0789% +/- 1.5479% (6.28 +/- 0.07) (4.45 -> 10.74)
seconds user: 124.4165% +/- 1.8322% (5.31 +/- 0.08) (4.26 -> 9.57)
seconds sys: 521.0422% +/- 17.4291% (0.98 +/- 0.03) (0.19 -> 1.16)
Comparing GC:
Combined GC time: 63.8901% +/- 1.2946% (1008.76 +/- 20.44) (1578.90 -> 2587.66)
```
(note that benchmarker passes `--deterministic` and limits the run to one cpu, both of which (potentially) makes it slower --- which is why the stats say 4.45 s instead of ~3.53 s and 10.74 s instead of ~8.48 s)
Change-Id: I785620ce40af11ca1f7b6c88a0ac863b2200f7d3
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/449180
Reviewed-by: Johnni Winther <johnniwinther@google.com>
Commit-Queue: Jens Johansen <jensj@google.com>
Jens Johansen
1a218c0103