1 /*
2 * Copyright (c) 2001, 2012, 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 *
337 // the total value for the collection set.
338 size_t _predicted_bytes_to_copy;
339
340 public:
341 HeapRegion(uint hrs_index,
342 G1BlockOffsetSharedArray* sharedOffsetArray,
343 MemRegion mr);
344
345 static int LogOfHRGrainBytes;
346 static int LogOfHRGrainWords;
347
348 static size_t GrainBytes;
349 static size_t GrainWords;
350 static size_t CardsPerRegion;
351
352 static size_t align_up_to_region_byte_size(size_t sz) {
353 return (sz + (size_t) GrainBytes - 1) &
354 ~((1 << (size_t) LogOfHRGrainBytes) - 1);
355 }
356
357 // It sets up the heap region size (GrainBytes / GrainWords), as
358 // well as other related fields that are based on the heap region
359 // size (LogOfHRGrainBytes / LogOfHRGrainWords /
360 // CardsPerRegion). All those fields are considered constant
361 // throughout the JVM's execution, therefore they should only be set
362 // up once during initialization time.
363 static void setup_heap_region_size(uintx min_heap_size);
364
365 enum ClaimValues {
366 InitialClaimValue = 0,
367 FinalCountClaimValue = 1,
368 NoteEndClaimValue = 2,
369 ScrubRemSetClaimValue = 3,
370 ParVerifyClaimValue = 4,
371 RebuildRSClaimValue = 5,
372 ParEvacFailureClaimValue = 6,
373 AggregateCountClaimValue = 7,
374 VerifyCountClaimValue = 8
375 };
376
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1 /*
2 * Copyright (c) 2001, 2013, 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 *
337 // the total value for the collection set.
338 size_t _predicted_bytes_to_copy;
339
340 public:
341 HeapRegion(uint hrs_index,
342 G1BlockOffsetSharedArray* sharedOffsetArray,
343 MemRegion mr);
344
345 static int LogOfHRGrainBytes;
346 static int LogOfHRGrainWords;
347
348 static size_t GrainBytes;
349 static size_t GrainWords;
350 static size_t CardsPerRegion;
351
352 static size_t align_up_to_region_byte_size(size_t sz) {
353 return (sz + (size_t) GrainBytes - 1) &
354 ~((1 << (size_t) LogOfHRGrainBytes) - 1);
355 }
356
357 // return the (conservative) maximum heap alignment for any heap region
358 static size_t max_heap_alignment();
359 // It sets up the heap region size (GrainBytes / GrainWords), as
360 // well as other related fields that are based on the heap region
361 // size (LogOfHRGrainBytes / LogOfHRGrainWords /
362 // CardsPerRegion). All those fields are considered constant
363 // throughout the JVM's execution, therefore they should only be set
364 // up once during initialization time.
365 static void setup_heap_region_size(uintx min_heap_size);
366
367 enum ClaimValues {
368 InitialClaimValue = 0,
369 FinalCountClaimValue = 1,
370 NoteEndClaimValue = 2,
371 ScrubRemSetClaimValue = 3,
372 ParVerifyClaimValue = 4,
373 RebuildRSClaimValue = 5,
374 ParEvacFailureClaimValue = 6,
375 AggregateCountClaimValue = 7,
376 VerifyCountClaimValue = 8
377 };
378
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