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/ci/ciCallProfile.hpp	Sat Dec 01 00:00:00 2007 +0000
     1.3 @@ -0,0 +1,75 @@
     1.4 +/*
     1.5 + * Copyright 1999-2006 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
    1.23 + * CA 95054 USA or visit www.sun.com if you need additional information or
    1.24 + * have any questions.
    1.25 + *
    1.26 + */
    1.27 +
    1.28 +// ciCallProfile
    1.29 +//
    1.30 +// This class is used to determine the frequently called method
    1.31 +// at some call site
    1.32 +class ciCallProfile : StackObj {
    1.33 +private:
    1.34 +  // Fields are initialized directly by ciMethod::call_profile_at_bci.
    1.35 +  friend class ciMethod;
    1.36 +
    1.37 +  enum { MorphismLimit = 2 }; // Max call site's morphism we care about
    1.38 +  int  _limit;                // number of receivers have been determined
    1.39 +  int  _morphism;             // determined call site's morphism
    1.40 +  int  _count;                // # times has this call been executed
    1.41 +  int  _receiver_count[MorphismLimit + 1]; // # times receivers have been seen
    1.42 +  ciMethod* _method[MorphismLimit + 1];    // receivers methods
    1.43 +  ciKlass*  _receiver[MorphismLimit + 1];  // receivers (exact)
    1.44 +
    1.45 +  ciCallProfile() {
    1.46 +    _limit = 0;
    1.47 +    _morphism    = 0;
    1.48 +    _count = -1;
    1.49 +    _receiver_count[0] = -1;
    1.50 +    _method[0]   = NULL;
    1.51 +    _receiver[0] = NULL;
    1.52 +  }
    1.53 +
    1.54 +  void add_receiver(ciKlass* receiver, int receiver_count);
    1.55 +
    1.56 +public:
    1.57 +  // Note:  The following predicates return false for invalid profiles:
    1.58 +  bool      has_receiver(int i) { return _limit > i; }
    1.59 +  int       morphism()          { return _morphism; }
    1.60 +
    1.61 +  int       count()             { return _count; }
    1.62 +  int       receiver_count(int i)  {
    1.63 +    assert(i < _limit, "out of Call Profile MorphismLimit");
    1.64 +    return _receiver_count[i];
    1.65 +  }
    1.66 +  float     receiver_prob(int i)  {
    1.67 +    assert(i < _limit, "out of Call Profile MorphismLimit");
    1.68 +    return (float)_receiver_count[i]/(float)_count;
    1.69 +  }
    1.70 +  ciMethod* method(int i)          {
    1.71 +    assert(i < _limit, "out of Call Profile MorphismLimit");
    1.72 +    return _method[i];
    1.73 +  }
    1.74 +  ciKlass*  receiver(int i)        {
    1.75 +    assert(i < _limit, "out of Call Profile MorphismLimit");
    1.76 +    return _receiver[i];
    1.77 +  }
    1.78 +};