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8010941: MinJumpTableSize is set to 18, investigate if that's still optimal

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Lowered the MinJumpTableSize for each platform

Reviewed-by: kvn
This commit is contained in:
Niclas Adlertz 2013-09-11 09:34:00 +02:00
parent 3d840abcc2
commit bcdf7e7a4d
3 changed files with 3 additions and 2 deletions
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1
hotspot/src/cpu/sparc/vm/c2_globals_sparc.hpp
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@ -57,6 +57,7 @@ define_pd_global(intx, RegisterCostAreaRatio, 12000);
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.

2
hotspot/src/cpu/x86/vm/c2_globals_x86.hpp
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@ -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, OnStackReplacePercentage, 140);
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);

2
hotspot/src/share/vm/opto/c2_globals.hpp
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@ -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, \