OpenJDK / amber / amber
changeset 19772:6e60ae28d9f6
8010941: MinJumpTableSize is set to 18, investigate if that's still optimal
Summary: Lowered the MinJumpTableSize for each platform
Reviewed-by: kvn
| author | adlertz |
|---|---|
| date | Wed, 11 Sep 2013 09:34:00 +0200 |
| parents | 1f38fb6a1268 |
| children | 66eea1d1fa69 b67e71448544 9f5ffba04ead |
| files | hotspot/src/cpu/sparc/vm/c2_globals_sparc.hpp hotspot/src/cpu/x86/vm/c2_globals_x86.hpp hotspot/src/share/vm/opto/c2_globals.hpp |
| diffstat | 3 files changed, 3 insertions(+), 2 deletions(-) [+] |
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--- a/hotspot/src/cpu/sparc/vm/c2_globals_sparc.hpp Tue Sep 10 15:28:44 2013 -0700 +++ b/hotspot/src/cpu/sparc/vm/c2_globals_sparc.hpp Wed Sep 11 09:34:00 2013 +0200 @@ -57,6 +57,7 @@ define_pd_global(bool, UseTLAB, true); define_pd_global(bool, ResizeTLAB, true); define_pd_global(intx, LoopUnrollLimit, 60); // Design center runs on 1.3.1 +define_pd_global(intx, MinJumpTableSize, 5); // Peephole and CISC spilling both break the graph, and so makes the // scheduler sick.
--- a/hotspot/src/cpu/x86/vm/c2_globals_x86.hpp Tue Sep 10 15:28:44 2013 -0700 +++ b/hotspot/src/cpu/x86/vm/c2_globals_x86.hpp Wed Sep 11 09:34:00 2013 +0200 @@ -30,7 +30,6 @@ // Sets the default values for platform dependent flags used by the server compiler. // (see c2_globals.hpp). Alpha-sorted. - define_pd_global(bool, BackgroundCompilation, true); define_pd_global(bool, UseTLAB, true); define_pd_global(bool, ResizeTLAB, true); @@ -52,6 +51,7 @@ define_pd_global(intx, ConditionalMoveLimit, 3); define_pd_global(intx, FLOATPRESSURE, 6); define_pd_global(intx, FreqInlineSize, 325); +define_pd_global(intx, MinJumpTableSize, 10); #ifdef AMD64 define_pd_global(intx, INTPRESSURE, 13); define_pd_global(intx, InteriorEntryAlignment, 16);
--- a/hotspot/src/share/vm/opto/c2_globals.hpp Tue Sep 10 15:28:44 2013 -0700 +++ b/hotspot/src/share/vm/opto/c2_globals.hpp Wed Sep 11 09:34:00 2013 +0200 @@ -421,7 +421,7 @@ product(bool, UseDivMod, true, \ "Use combined DivMod instruction if available") \ \ - product(intx, MinJumpTableSize, 18, \ + product_pd(intx, MinJumpTableSize, \ "Minimum number of targets in a generated jump table") \ \ product(intx, MaxJumpTableSize, 65000, \