1 /*
   2  * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 // Sets the default values for platform dependent flags used by the server compiler.
  26 // (see c2_globals.hpp).  Alpha-sorted.
  27 
  28 define_pd_global(bool, BackgroundCompilation,        true);
  29 define_pd_global(bool, CICompileOSR,                 true);
  30 define_pd_global(bool, InlineIntrinsics,             false);
  31 define_pd_global(bool, PreferInterpreterNativeStubs, false);
  32 define_pd_global(bool, ProfileTraps,                 true);
  33 define_pd_global(bool, UseOnStackReplacement,        true);
  34 #ifdef CC_INTERP
  35 define_pd_global(bool, ProfileInterpreter,           false);
  36 #else
  37 define_pd_global(bool, ProfileInterpreter,           true);
  38 #endif // CC_INTERP
  39 define_pd_global(bool, TieredCompilation,            false);
  40 define_pd_global(intx, CompileThreshold,             10000);
  41 define_pd_global(intx, BackEdgeThreshold,            140000);
  42 
  43 define_pd_global(intx, OnStackReplacePercentage,     140);
  44 define_pd_global(intx, ConditionalMoveLimit,         4);
  45 define_pd_global(intx, FLOATPRESSURE,                52);  // C2 on V9 gets to use all the float/double registers
  46 define_pd_global(intx, FreqInlineSize,               175);
  47 define_pd_global(intx, INTPRESSURE,                  48);  // large register set
  48 define_pd_global(intx, InteriorEntryAlignment,       16);  // = CodeEntryAlignment
  49 define_pd_global(intx, NewSizeThreadIncrease, ScaleForWordSize(4*K));
  50 define_pd_global(intx, RegisterCostAreaRatio,        12000);
  51 define_pd_global(bool, UseTLAB,                      true);
  52 define_pd_global(bool, ResizeTLAB,                   true);
  53 define_pd_global(intx, LoopUnrollLimit,              60); // Design center runs on 1.3.1
  54 
  55 // Peephole and CISC spilling both break the graph, and so makes the
  56 // scheduler sick.
  57 define_pd_global(bool, OptoPeephole,                 false);
  58 define_pd_global(bool, UseCISCSpill,                 false);
  59 define_pd_global(bool, OptoBundling,                 false);
  60 define_pd_global(bool, OptoScheduling,               true);
  61 
  62 #ifdef _LP64
  63 // We need to make sure that all generated code is within
  64 // 2 gigs of the libjvm.so runtime routines so we can use
  65 // the faster "call" instruction rather than the expensive
  66 // sequence of instructions to load a 64 bit pointer.
  67 //
  68 // InitialCodeCacheSize derived from specjbb2000 run.
  69 define_pd_global(intx, InitialCodeCacheSize,         2048*K); // Integral multiple of CodeCacheExpansionSize
  70 define_pd_global(intx, ReservedCodeCacheSize,        48*M);
  71 define_pd_global(intx, CodeCacheExpansionSize,       64*K);
  72 
  73 // Ergonomics related flags
  74 define_pd_global(uint64_t,MaxRAM,                    128ULL*G);
  75 #else
  76 // InitialCodeCacheSize derived from specjbb2000 run.
  77 define_pd_global(intx, InitialCodeCacheSize,         1536*K); // Integral multiple of CodeCacheExpansionSize
  78 define_pd_global(intx, ReservedCodeCacheSize,        32*M);
  79 define_pd_global(intx, CodeCacheExpansionSize,       32*K);
  80 // Ergonomics related flags
  81 define_pd_global(uint64_t,MaxRAM,                    4ULL*G);
  82 #endif
  83 define_pd_global(uintx,CodeCacheMinBlockLength,      4);
  84 
  85 // Heap related flags
  86 define_pd_global(uintx,PermSize,    ScaleForWordSize(16*M));
  87 define_pd_global(uintx,MaxPermSize, ScaleForWordSize(64*M));
  88 
  89 // Ergonomics related flags
  90 define_pd_global(bool, NeverActAsServerClassMachine, false);