jdk8-mips64-public/hotspot: src/share/vm/shark/sharkStateScanner.cpp@01522ca68fc7

8015237: Parallelize string table scanning during strong root processing
Summary: Parallelize the scanning of the intern string table by having each GC worker claim a given number of buckets. Changes were also reviewed by Per Liden <per.liden@oracle.com>.
Reviewed-by: tschatzl, stefank, twisti

     1 /*

     2  * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.

     3  * Copyright 2008, 2009 Red Hat, Inc.

     4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     5  *

     6  * This code is free software; you can redistribute it and/or modify it

     7  * under the terms of the GNU General Public License version 2 only, as

     8  * published by the Free Software Foundation.

     9  *

    10  * This code is distributed in the hope that it will be useful, but WITHOUT

    11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    13  * version 2 for more details (a copy is included in the LICENSE file that

    14  * accompanied this code).

    15  *

    16  * You should have received a copy of the GNU General Public License version

    17  * 2 along with this work; if not, write to the Free Software Foundation,

    18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    19  *

    20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    21  * or visit www.oracle.com if you need additional information or have any

    22  * questions.

    23  *

    24  */

    26 #include "precompiled.hpp"

    27 #include "shark/sharkState.hpp"

    28 #include "shark/sharkStateScanner.hpp"

    30 using namespace llvm;

    32 void SharkStateScanner::scan(SharkState* state) {

    33   start_frame();

    35   // Expression stack

    36   stack_integrity_checks(state);

    37   start_stack(state->stack_depth());

    38   for (int i = state->stack_depth() - 1; i >= 0; i--) {

    39     process_stack_slot(

    40       i,

    41       state->stack_addr(i),

    42       stack()->stack_slots_offset() +

    43         i + max_stack() - state->stack_depth());

    44   }

    45   end_stack();

    47   // Monitors

    48   start_monitors(state->num_monitors());

    49   for (int i = 0; i < state->num_monitors(); i++) {

    50     process_monitor(

    51       i,

    52       stack()->monitor_offset(i),

    53       stack()->monitor_object_offset(i));

    54   }

    55   end_monitors();

    57   // Frame header

    58   start_frame_header();

    59   process_oop_tmp_slot(

    60     state->oop_tmp_addr(), stack()->oop_tmp_slot_offset());

    61   process_method_slot(state->method_addr(), stack()->method_slot_offset());

    62   process_pc_slot(stack()->pc_slot_offset());

    63   end_frame_header();

    65   // Local variables

    66   locals_integrity_checks(state);

    67   start_locals();

    68   for (int i = 0; i < max_locals(); i++) {

    69     process_local_slot(

    70       i,

    71       state->local_addr(i),

    72       stack()->locals_slots_offset() + max_locals() - 1 - i);

    73   }

    74   end_locals();

    76   end_frame();

    77 }

    79 #ifndef PRODUCT

    80 void SharkStateScanner::stack_integrity_checks(SharkState* state) {

    81   for (int i = 0; i < state->stack_depth(); i++) {

    82     if (state->stack(i)) {

    83       if (state->stack(i)->is_two_word())

    84         assert(state->stack(i - 1) == NULL, "should be");

    85     }

    86     else {

    87       assert(state->stack(i + 1)->is_two_word(), "should be");

    88     }

    89   }

    90 }

    92 void SharkStateScanner::locals_integrity_checks(SharkState* state) {

    93   for (int i = 0; i < max_locals(); i++) {

    94     if (state->local(i)) {

    95       if (state->local(i)->is_two_word())

    96         assert(state->local(i + 1) == NULL, "should be");

    97     }

    98   }

    99 }

   100 #endif // !PRODUCT

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

src/share/vm/shark/sharkStateScanner.cpp@01522ca68fc7

src/share/vm/shark/sharkStateScanner.cpp