e7af7a4aef
Co-authored-by: Stefan Karlsson <stefan.karlsson@oracle.com> Co-authored-by: Erik Osterlund <erik.osterlund@oracle.com> Co-authored-by: Mikael Gerdin <mikael.gerdin@oracle.com> Co-authored-by: Kim Barrett <kim.barrett@oracle.com> Co-authored-by: Nils Eliasson <nils.eliasson@oracle.com> Co-authored-by: Rickard Backman <rickard.backman@oracle.com> Co-authored-by: Roland Westrelin <rwestrel@redhat.com> Co-authored-by: Coleen Phillimore <coleen.phillimore@oracle.com> Co-authored-by: Robbin Ehn <robbin.ehn@oracle.com> Co-authored-by: Gerard Ziemski <gerard.ziemski@oracle.com> Co-authored-by: Hugh Wilkinson <hugh.wilkinson@intel.com> Co-authored-by: Sandhya Viswanathan <sandhya.viswanathan@intel.com> Co-authored-by: Bill Wheeler <bill.npo.wheeler@intel.com> Co-authored-by: Vinay K. Awasthi <vinay.k.awasthi@intel.com> Co-authored-by: Yasumasa Suenaga <yasuenag@gmail.com> Reviewed-by: pliden, stefank, eosterlund, ehelin, sjohanss, rbackman, coleenp, ihse, jgeorge, lmesnik, rkennke
75 lines
2.3 KiB
C++
75 lines
2.3 KiB
C++
/*
|
|
* Copyright (c) 2015, 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.
|
|
*
|
|
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
|
|
* or visit www.oracle.com if you need additional information or have any
|
|
* questions.
|
|
*/
|
|
|
|
#include "precompiled.hpp"
|
|
#include "gc/z/zCPU.hpp"
|
|
#include "logging/log.hpp"
|
|
#include "memory/padded.inline.hpp"
|
|
#include "runtime/os.hpp"
|
|
#include "runtime/thread.inline.hpp"
|
|
#include "utilities/debug.hpp"
|
|
|
|
#define ZCPU_UNKNOWN_AFFINITY (Thread*)-1;
|
|
#define ZCPU_UNKNOWN_SELF (Thread*)-2;
|
|
|
|
PaddedEnd<ZCPU::ZCPUAffinity>* ZCPU::_affinity = NULL;
|
|
__thread Thread* ZCPU::_self = ZCPU_UNKNOWN_SELF;
|
|
__thread uint32_t ZCPU::_cpu = 0;
|
|
|
|
void ZCPU::initialize() {
|
|
assert(_affinity == NULL, "Already initialized");
|
|
const uint32_t ncpus = count();
|
|
|
|
_affinity = PaddedArray<ZCPUAffinity, mtGC>::create_unfreeable(ncpus);
|
|
|
|
for (uint32_t i = 0; i < ncpus; i++) {
|
|
_affinity[i]._thread = ZCPU_UNKNOWN_AFFINITY;
|
|
}
|
|
|
|
log_info(gc, init)("CPUs: %u total, %u available",
|
|
os::processor_count(),
|
|
os::initial_active_processor_count());
|
|
}
|
|
|
|
uint32_t ZCPU::count() {
|
|
return os::processor_count();
|
|
}
|
|
|
|
uint32_t ZCPU::id() {
|
|
assert(_affinity != NULL, "Not initialized");
|
|
|
|
// Fast path
|
|
if (_affinity[_cpu]._thread == _self) {
|
|
return _cpu;
|
|
}
|
|
|
|
// Slow path
|
|
_self = Thread::current();
|
|
_cpu = os::processor_id();
|
|
|
|
// Update affinity table
|
|
_affinity[_cpu]._thread = _self;
|
|
|
|
return _cpu;
|
|
}
|