jdk8-mips64-public/hotspot: src/os/solaris/vm/thread

6784100: getTimeNanos - CAS reduction
Summary: Get rid of the CAS loop in getTimeNanos to reduce coherence traffic on Solaris.
Reviewed-by: acorn, kvn, ysr

     1 /*

     2  * Copyright 2002-2003 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  *

    23  */

    25 // Thread::current is "hot" it's called > 128K times in the 1st 500 msecs of

    26 // startup.

    27 // ThreadLocalStorage::thread is warm -- it's called > 16K times in the same

    28 // period.   Thread::current() now calls ThreadLocalStorage::thread() directly.

    29 // For SPARC, to avoid excessive register window spill-fill faults,

    30 // we aggressively inline these routines.

    32 inline Thread* ThreadLocalStorage::thread()  {

    33   // don't use specialized code if +UseMallocOnly -- may confuse Purify et al.

    34   debug_only(if (UseMallocOnly) return get_thread_slow(););

    36   uintptr_t raw = pd_raw_thread_id();

    37   int ix = pd_cache_index(raw);

    38   Thread *Candidate = ThreadLocalStorage::_get_thread_cache[ix];

    39   if (Candidate->_self_raw_id == raw) {

    40     // hit

    41     return Candidate;

    42   } else {

    43     return ThreadLocalStorage::get_thread_via_cache_slowly(raw, ix);

    44   }

    45 }

src/os/solaris/vm/thread_solaris.inline.hpp@8a25d96bcf08

src/os/solaris/vm/thread_solaris.inline.hpp

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

src/os/solaris/vm/thread_solaris.inline.hpp@8a25d96bcf08

src/os/solaris/vm/thread_solaris.inline.hpp