Mercurial > jdk8-mips64-public > hotspot / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/share/vm/runtime/simpleThresholdPolicy.inline.hpp	Fri Sep 03 17:51:07 2010 -0700
     1.3 @@ -0,0 +1,64 @@
     1.4 +/*
     1.5 + * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
     1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
     1.7 + *
     1.8 + * This code is free software; you can redistribute it and/or modify it
     1.9 + * under the terms of the GNU General Public License version 2 only, as
    1.10 + * published by the Free Software Foundation.
    1.11 + *
    1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
    1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    1.14 + * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    1.15 + * version 2 for more details (a copy is included in the LICENSE file that
    1.16 + * accompanied this code).
    1.17 + *
    1.18 + * You should have received a copy of the GNU General Public License version
    1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
    1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
    1.21 + *
    1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
    1.23 + * or visit www.oracle.com if you need additional information or have any
    1.24 + * questions.
    1.25 + *
    1.26 + */
    1.27 +
    1.28 +
    1.29 +template<CompLevel level>
    1.30 +bool SimpleThresholdPolicy::call_predicate_helper(int i, int b, double scale) {
    1.31 +  switch(level) {
    1.32 +  case CompLevel_none:
    1.33 +  case CompLevel_limited_profile:
    1.34 +    return (i > Tier3InvocationThreshold * scale) ||
    1.35 +           (i > Tier3MinInvocationThreshold * scale && i + b > Tier3CompileThreshold * scale);
    1.36 +  case CompLevel_full_profile:
    1.37 +   return (i > Tier4InvocationThreshold * scale) ||
    1.38 +          (i > Tier4MinInvocationThreshold * scale && i + b > Tier4CompileThreshold * scale);
    1.39 +  }
    1.40 +  return true;
    1.41 +}
    1.42 +
    1.43 +template<CompLevel level>
    1.44 +bool SimpleThresholdPolicy::loop_predicate_helper(int i, int b, double scale) {
    1.45 +  switch(level) {
    1.46 +  case CompLevel_none:
    1.47 +  case CompLevel_limited_profile:
    1.48 +    return b > Tier3BackEdgeThreshold * scale;
    1.49 +  case CompLevel_full_profile:
    1.50 +    return b > Tier4BackEdgeThreshold * scale;
    1.51 +  }
    1.52 +  return true;
    1.53 +}
    1.54 +
    1.55 +// Simple methods are as good being compiled with C1 as C2.
    1.56 +// Determine if a given method is such a case.
    1.57 +bool SimpleThresholdPolicy::is_trivial(methodOop method) {
    1.58 +  if (method->is_accessor()) return true;
    1.59 +  if (method->code() != NULL) {
    1.60 +    methodDataOop mdo = method->method_data();
    1.61 +    if (mdo != NULL && mdo->num_loops() == 0 &&
    1.62 +        (method->code_size() < 5  || (mdo->num_blocks() < 4) && (method->code_size() < 15))) {
    1.63 +      return !mdo->would_profile();
    1.64 +    }
    1.65 +  }
    1.66 +  return false;
    1.67 +}