src/hotspot/share/gc/z/zMarkCache.inline.hpp
author pliden
Tue, 12 Jun 2018 17:40:28 +0200
changeset 50525 767cdb97f103
child 59039 c60978f87d45
permissions -rw-r--r--
8204210: Implementation: JEP 333: ZGC: A Scalable Low-Latency Garbage Collector (Experimental) Reviewed-by: pliden, stefank, eosterlund, ehelin, sjohanss, rbackman, coleenp, ihse, jgeorge, lmesnik, rkennke Contributed-by: per.liden@oracle.com, stefan.karlsson@oracle.com, erik.osterlund@oracle.com, mikael.gerdin@oracle.com, kim.barrett@oracle.com, nils.eliasson@oracle.com, rickard.backman@oracle.com, rwestrel@redhat.com, coleen.phillimore@oracle.com, robbin.ehn@oracle.com, gerard.ziemski@oracle.com, hugh.wilkinson@intel.com, sandhya.viswanathan@intel.com, bill.npo.wheeler@intel.com, vinay.k.awasthi@intel.com, yasuenag@gmail.com

/*
 * Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
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#ifndef SHARE_GC_Z_ZMARKCACHE_INLINE_HPP
#define SHARE_GC_Z_ZMARKCACHE_INLINE_HPP

#include "gc/z/zMarkCache.hpp"
#include "gc/z/zPage.inline.hpp"

inline void ZMarkCacheEntry::inc_live(ZPage* page, size_t bytes) {
  if (_page == page) {
    // Cache hit
    _objects++;
    _bytes += bytes;
  } else {
    // Cache miss
    evict();
    _page = page;
    _objects = 1;
    _bytes = bytes;
  }
}

inline void ZMarkCacheEntry::evict() {
  if (_page != NULL) {
    // Write cached data out to page
    _page->inc_live_atomic(_objects, _bytes);
    _page = NULL;
  }
}

inline void ZMarkCache::inc_live(ZPage* page, size_t bytes) {
  const size_t mask = ZMarkCacheSize - 1;
  const size_t index = (page->start() >> _shift) & mask;
  _cache[index].inc_live(page, bytes);
}

#endif // SHARE_GC_Z_ZMARKCACHE_INLINE_HPP