smt.hh revision 2
1/* 2 * Copyright (c) 2003 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29/** 30 * @file 31 * Defines SMT_MAX_CPUS and SMT_MAX_THREADS. 32 */ 33 34#ifndef __SMT_HH__ 35#define __SMT_HH__ 36 37#ifndef SMT_MAX_CPUS 38/** The maximum number of cpus in any one system. */ 39#define SMT_MAX_CPUS 4 40#endif 41 42#ifndef SMT_MAX_THREADS 43/** The number of TPUs in any processor. */ 44#define SMT_MAX_THREADS 4 45#endif 46 47/** 48 * The maximum number of active threads across all cpus. Used to 49 * initialize per-thread statistics in the cache. 50 * 51 * NB: Be careful to only use it once all the CPUs that you care about 52 * have been initialized 53 */ 54extern int maxThreadsPerCPU; 55 56/** 57 * Changes the status and priority of the thread with the given number. 58 * @param thread_number The thread to change. 59 * @param activate The new active status. 60 * @param priority The new priority. 61 */ 62void change_thread_state(int thread_number, int activate, int priority); 63 64#endif // __SMT_HH__ 65