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changeset 12192:34bd5e86aadb

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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 e0d33d2ce5aa
children 0821b5d72ca8 8c83625e3a53 3a4e6c929bf3
files src/cpu/sparc/vm/c2_globals_sparc.hpp src/cpu/x86/vm/c2_globals_x86.hpp src/share/vm/opto/c2_globals.hpp
diffstat 3 files changed, 3 insertions(+), 2 deletions(-) [+]
line wrap: on
line diff
--- a/src/cpu/sparc/vm/c2_globals_sparc.hpp	Tue Sep 10 15:28:44 2013 -0700
+++ b/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/src/cpu/x86/vm/c2_globals_x86.hpp	Tue Sep 10 15:28:44 2013 -0700
+++ b/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/src/share/vm/opto/c2_globals.hpp	Tue Sep 10 15:28:44 2013 -0700
+++ b/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,                                    \