Title: [277326] trunk/Source/_javascript_Core
- Revision
- 277326
- Author
- fpi...@apple.com
- Date
- 2021-05-11 08:52:17 -0700 (Tue, 11 May 2021)
Log Message
Tune number of threads for AS
https://bugs.webkit.org/show_bug.cgi?id=225635
Reviewed by Mark Lam.
Using 4 GC markers (which really means 3 parallel GC worker threads -- the mutator thread is
the 4th), 2 DFG threads, and 2 FTL threads seems to be more optimal than going off ncpu.
~1% JetStream2 speed-up, ~1% Speedometer2 speed-up.
* runtime/Options.cpp:
(JSC::overrideDefaults):
Modified Paths
Diff
Modified: trunk/Source/_javascript_Core/ChangeLog (277325 => 277326)
--- trunk/Source/_javascript_Core/ChangeLog 2021-05-11 15:33:13 UTC (rev 277325)
+++ trunk/Source/_javascript_Core/ChangeLog 2021-05-11 15:52:17 UTC (rev 277326)
@@ -1,3 +1,18 @@
+2021-05-10 Filip Pizlo <fpi...@apple.com>
+
+ Tune number of threads for AS
+ https://bugs.webkit.org/show_bug.cgi?id=225635
+
+ Reviewed by Mark Lam.
+
+ Using 4 GC markers (which really means 3 parallel GC worker threads -- the mutator thread is
+ the 4th), 2 DFG threads, and 2 FTL threads seems to be more optimal than going off ncpu.
+
+ ~1% JetStream2 speed-up, ~1% Speedometer2 speed-up.
+
+ * runtime/Options.cpp:
+ (JSC::overrideDefaults):
+
2021-05-10 Mark Lam <mark....@apple.com>
Removed unused CallRecord::bytecodeIndex field.
Modified: trunk/Source/_javascript_Core/runtime/Options.cpp (277325 => 277326)
--- trunk/Source/_javascript_Core/runtime/Options.cpp 2021-05-11 15:33:13 UTC (rev 277325)
+++ trunk/Source/_javascript_Core/runtime/Options.cpp 2021-05-11 15:52:17 UTC (rev 277326)
@@ -352,6 +352,12 @@
Options::gcIncrementScale() = 0;
}
+#if PLATFORM(MAC) && CPU(ARM64)
+ Options::numberOfGCMarkers() = 4;
+ Options::numberOfDFGCompilerThreads() = 2;
+ Options::numberOfFTLCompilerThreads() = 2;
+#endif
+
#if USE(BMALLOC_MEMORY_FOOTPRINT_API)
// On iOS and conditionally Linux, we control heap growth using process memory footprint. Therefore these values can be agressive.
Options::smallHeapRAMFraction() = 0.8;
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