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view graal/com.oracle.graal.hotspot.hsail/src/com/oracle/graal/hotspot/hsail/DonorThreadPool.java @ 15066:2cae21d9f122
HSAIL: initial support for object allocation in HSAIL kernels
Contributed-by: Tom Deneau <tom.deneau@amd.com>
author | Doug Simon <doug.simon@oracle.com> |
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date | Fri, 11 Apr 2014 17:12:08 +0200 |
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/* * Copyright (c) 2014, 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. */ package com.oracle.graal.hotspot.hsail; import static com.oracle.graal.hotspot.hsail.HSAILHotSpotBackend.Options.*; import java.util.concurrent.*; import com.oracle.graal.hotspot.hsail.HSAILHotSpotBackend.Options; /** * Thread pool for HSAIL allocation support. */ public class DonorThreadPool { private final Thread[] threads; void waitAt(CyclicBarrier barrier) { try { barrier.await(); } catch (Exception e) { e.printStackTrace(); } } /** * Creates a pool of threads whose size is given by {@link Options#HsailDonorThreads}. */ DonorThreadPool() { int size = HsailDonorThreads.getValue(); this.threads = new Thread[size]; CyclicBarrier barrier = new CyclicBarrier(size + 1); // fill in threads for (int i = 0; i < size; i++) { threads[i] = new Thread(new Runnable() { @Override public void run() { while (true) { waitAt(barrier); } } }, "HsailDonorThread-" + i); threads[i].setDaemon(true); threads[i].start(); } // creating thread waits at barrier to make sure others have started waitAt(barrier); } public Thread[] getThreads() { return threads; } }