mirror of
https://github.com/mozilla/gecko-dev.git
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443 lines
11 KiB
C
443 lines
11 KiB
C
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nspr.h"
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#include "plgetopt.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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int _debug_on = 0;
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#define DPRINTF(arg) if (_debug_on) printf arg
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#include "obsolete/prsem.h"
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PRLock *lock;
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PRMonitor *mon;
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PRMonitor *mon2;
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#define DEFAULT_COUNT 1000
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PRInt32 count;
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static void nop(int a, int b, int c)
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{
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}
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static void LocalProcedureCall(void)
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{
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PRInt32 i;
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for (i = 0; i < count; i++) {
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nop(i, i, 5);
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}
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}
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static void DLLProcedureCall(void)
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{
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PRInt32 i;
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PRThreadState state;
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PRThread *self = PR_GetCurrentThread();
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for (i = 0; i < count; i++) {
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state = PR_GetThreadState(self);
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}
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}
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static void Now(void)
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{
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PRInt32 i;
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PRTime time;
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for (i = 0; i < count; i++) {
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time = PR_Now();
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}
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}
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static void Interval(void)
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{
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PRInt32 i;
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PRIntervalTime time;
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for (i = 0; i < count; i++) {
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time = PR_IntervalNow();
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}
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}
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static void IdleLock(void)
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{
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PRInt32 i;
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for (i = 0; i < count; i++) {
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PR_Lock(lock);
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PR_Unlock(lock);
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}
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}
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static void IdleMonitor(void)
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{
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PRInt32 i;
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for (i = 0; i < count; i++) {
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PR_EnterMonitor(mon);
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PR_ExitMonitor(mon);
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}
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}
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static void IdleCMonitor(void)
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{
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PRInt32 i;
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for (i = 0; i < count; i++) {
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PR_CEnterMonitor((void*)7);
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PR_CExitMonitor((void*)7);
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}
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}
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/************************************************************************/
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static void PR_CALLBACK dull(void *arg)
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{
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}
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static void CDThread(void)
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{
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PRInt32 i;
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int num_threads = count;
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/*
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* Cannot create too many threads
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*/
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if (num_threads > 1000)
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num_threads = 1000;
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for (i = 0; i < num_threads; i++) {
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PRThread *t = PR_CreateThread(PR_USER_THREAD,
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dull, 0,
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PR_PRIORITY_NORMAL,
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PR_LOCAL_THREAD,
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PR_UNJOINABLE_THREAD,
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0);
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if (NULL == t) {
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fprintf(stderr, "CDThread: cannot create thread %3d\n", i);
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} else {
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DPRINTF(("CDThread: created thread %3d \n",i));
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}
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PR_Sleep(0);
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}
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}
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static int alive;
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static int cxq;
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static void PR_CALLBACK CXReader(void *arg)
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{
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PRInt32 i, n;
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PR_EnterMonitor(mon);
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n = count / 2;
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for (i = 0; i < n; i++) {
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while (cxq == 0) {
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DPRINTF(("CXReader: thread = 0x%lx waiting\n",
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PR_GetCurrentThread()));
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PR_Wait(mon, PR_INTERVAL_NO_TIMEOUT);
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}
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--cxq;
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PR_Notify(mon);
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}
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PR_ExitMonitor(mon);
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PR_EnterMonitor(mon2);
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--alive;
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PR_Notify(mon2);
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PR_ExitMonitor(mon2);
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DPRINTF(("CXReader: thread = 0x%lx exiting\n", PR_GetCurrentThread()));
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}
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static void PR_CALLBACK CXWriter(void *arg)
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{
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PRInt32 i, n;
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PR_EnterMonitor(mon);
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n = count / 2;
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for (i = 0; i < n; i++) {
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while (cxq == 1) {
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DPRINTF(("CXWriter: thread = 0x%lx waiting\n",
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PR_GetCurrentThread()));
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PR_Wait(mon, PR_INTERVAL_NO_TIMEOUT);
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}
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++cxq;
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PR_Notify(mon);
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}
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PR_ExitMonitor(mon);
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PR_EnterMonitor(mon2);
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--alive;
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PR_Notify(mon2);
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PR_ExitMonitor(mon2);
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DPRINTF(("CXWriter: thread = 0x%lx exiting\n", PR_GetCurrentThread()));
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}
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static void ContextSwitch(PRThreadScope scope1, PRThreadScope scope2)
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{
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PRThread *t1, *t2;
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PR_EnterMonitor(mon2);
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alive = 2;
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cxq = 0;
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t1 = PR_CreateThread(PR_USER_THREAD,
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CXReader, 0,
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PR_PRIORITY_NORMAL,
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scope1,
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PR_UNJOINABLE_THREAD,
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0);
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if (NULL == t1) {
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fprintf(stderr, "ContextSwitch: cannot create thread\n");
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} else {
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DPRINTF(("ContextSwitch: created %s thread = 0x%lx\n",
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(scope1 == PR_GLOBAL_THREAD ?
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"PR_GLOBAL_THREAD" : "PR_LOCAL_THREAD"),
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t1));
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}
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t2 = PR_CreateThread(PR_USER_THREAD,
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CXWriter, 0,
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PR_PRIORITY_NORMAL,
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scope2,
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PR_UNJOINABLE_THREAD,
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0);
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if (NULL == t2) {
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fprintf(stderr, "ContextSwitch: cannot create thread\n");
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} else {
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DPRINTF(("ContextSwitch: created %s thread = 0x%lx\n",
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(scope2 == PR_GLOBAL_THREAD ?
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"PR_GLOBAL_THREAD" : "PR_LOCAL_THREAD"),
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t2));
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}
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/* Wait for both of the threads to exit */
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while (alive) {
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PR_Wait(mon2, PR_INTERVAL_NO_TIMEOUT);
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}
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PR_ExitMonitor(mon2);
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}
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static void ContextSwitchUU(void)
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{
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ContextSwitch(PR_LOCAL_THREAD, PR_LOCAL_THREAD);
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}
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static void ContextSwitchUK(void)
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{
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ContextSwitch(PR_LOCAL_THREAD, PR_GLOBAL_THREAD);
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}
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static void ContextSwitchKU(void)
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{
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ContextSwitch(PR_GLOBAL_THREAD, PR_LOCAL_THREAD);
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}
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static void ContextSwitchKK(void)
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{
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ContextSwitch(PR_GLOBAL_THREAD, PR_GLOBAL_THREAD);
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}
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/************************************************************************/
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static void PR_CALLBACK SemaThread(void *argSema)
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{
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PRSemaphore **sem = (PRSemaphore **)argSema;
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PRInt32 i, n;
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n = count / 2;
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for (i = 0; i < n; i++) {
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DPRINTF(("SemaThread: thread = 0x%lx waiting on sem = 0x%lx\n",
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PR_GetCurrentThread(), sem[0]));
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PR_WaitSem(sem[0]);
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DPRINTF(("SemaThread: thread = 0x%lx posting on sem = 0x%lx\n",
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PR_GetCurrentThread(), sem[1]));
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PR_PostSem(sem[1]);
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}
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PR_EnterMonitor(mon2);
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--alive;
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PR_Notify(mon2);
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PR_ExitMonitor(mon2);
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DPRINTF(("SemaThread: thread = 0x%lx exiting\n", PR_GetCurrentThread()));
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}
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static PRSemaphore *sem_set1[2];
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static PRSemaphore *sem_set2[2];
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static void SemaContextSwitch(PRThreadScope scope1, PRThreadScope scope2)
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{
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PRThread *t1, *t2;
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sem_set1[0] = PR_NewSem(1);
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sem_set1[1] = PR_NewSem(0);
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sem_set2[0] = sem_set1[1];
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sem_set2[1] = sem_set1[0];
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PR_EnterMonitor(mon2);
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alive = 2;
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cxq = 0;
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t1 = PR_CreateThread(PR_USER_THREAD,
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SemaThread,
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sem_set1,
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PR_PRIORITY_NORMAL,
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scope1,
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PR_UNJOINABLE_THREAD,
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0);
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if (NULL == t1) {
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fprintf(stderr, "SemaContextSwitch: cannot create thread\n");
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} else {
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DPRINTF(("SemaContextSwitch: created %s thread = 0x%lx\n",
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(scope1 == PR_GLOBAL_THREAD ?
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"PR_GLOBAL_THREAD" : "PR_LOCAL_THREAD"),
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t1));
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}
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t2 = PR_CreateThread(PR_USER_THREAD,
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SemaThread,
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sem_set2,
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PR_PRIORITY_NORMAL,
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scope2,
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PR_UNJOINABLE_THREAD,
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0);
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if (NULL == t2) {
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fprintf(stderr, "SemaContextSwitch: cannot create thread\n");
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} else {
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DPRINTF(("SemaContextSwitch: created %s thread = 0x%lx\n",
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(scope2 == PR_GLOBAL_THREAD ?
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"PR_GLOBAL_THREAD" : "PR_LOCAL_THREAD"),
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t2));
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}
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/* Wait for both of the threads to exit */
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while (alive) {
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PR_Wait(mon2, PR_INTERVAL_NO_TIMEOUT);
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}
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PR_ExitMonitor(mon2);
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PR_DestroySem(sem_set1[0]);
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PR_DestroySem(sem_set1[1]);
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}
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static void SemaContextSwitchUU(void)
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{
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SemaContextSwitch(PR_LOCAL_THREAD, PR_LOCAL_THREAD);
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}
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static void SemaContextSwitchUK(void)
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{
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SemaContextSwitch(PR_LOCAL_THREAD, PR_GLOBAL_THREAD);
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}
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static void SemaContextSwitchKU(void)
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{
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SemaContextSwitch(PR_GLOBAL_THREAD, PR_LOCAL_THREAD);
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}
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static void SemaContextSwitchKK(void)
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{
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SemaContextSwitch(PR_GLOBAL_THREAD, PR_GLOBAL_THREAD);
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}
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/************************************************************************/
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static void Measure(void (*func)(void), const char *msg)
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{
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PRIntervalTime start, stop;
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double d;
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start = PR_IntervalNow();
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(*func)();
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stop = PR_IntervalNow() - start;
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d = (double)PR_IntervalToMicroseconds(stop);
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printf("%40s: %6.2f usec\n", msg, d / count);
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}
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int main(int argc, char **argv)
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{
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PLOptStatus os;
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PLOptState *opt = PL_CreateOptState(argc, argv, "dc:");
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while (PL_OPT_EOL != (os = PL_GetNextOpt(opt)))
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{
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if (PL_OPT_BAD == os) continue;
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switch (opt->option)
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{
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case 'd': /* debug mode */
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_debug_on = 1;
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break;
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case 'c': /* loop count */
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count = atoi(opt->value);
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break;
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default:
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break;
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}
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}
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PL_DestroyOptState(opt);
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if (0 == count) count = DEFAULT_COUNT;
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PR_Init(PR_USER_THREAD, PR_PRIORITY_NORMAL, 0);
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PR_BlockClockInterrupts();
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PR_UnblockClockInterrupts();
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PR_STDIO_INIT();
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lock = PR_NewLock();
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mon = PR_NewMonitor();
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mon2 = PR_NewMonitor();
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Measure(LocalProcedureCall, "local procedure call overhead");
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Measure(DLLProcedureCall, "DLL procedure call overhead");
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Measure(Now, "current calendar time");
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Measure(Interval, "interval time");
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Measure(IdleLock, "idle lock lock/unlock pair");
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Measure(IdleMonitor, "idle monitor entry/exit pair");
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Measure(IdleCMonitor, "idle cache monitor entry/exit pair");
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Measure(CDThread, "create/destroy thread pair");
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Measure(ContextSwitchUU, "context switch - user/user");
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Measure(ContextSwitchUK, "context switch - user/kernel");
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Measure(ContextSwitchKU, "context switch - kernel/user");
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Measure(ContextSwitchKK, "context switch - kernel/kernel");
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Measure(SemaContextSwitchUU, "sema context switch - user/user");
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Measure(SemaContextSwitchUK, "sema context switch - user/kernel");
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Measure(SemaContextSwitchKU, "sema context switch - kernel/user");
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Measure(SemaContextSwitchKK, "sema context switch - kernel/kernel");
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printf("--------------\n");
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printf("Adding 7 additional CPUs\n");
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PR_SetConcurrency(8);
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printf("--------------\n");
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Measure(LocalProcedureCall, "local procedure call overhead");
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Measure(DLLProcedureCall, "DLL procedure call overhead");
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Measure(Now, "current calendar time");
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Measure(Interval, "interval time");
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Measure(IdleLock, "idle lock lock/unlock pair");
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Measure(IdleMonitor, "idle monitor entry/exit pair");
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Measure(IdleCMonitor, "idle cache monitor entry/exit pair");
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Measure(CDThread, "create/destroy thread pair");
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Measure(ContextSwitchUU, "context switch - user/user");
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Measure(ContextSwitchUK, "context switch - user/kernel");
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Measure(ContextSwitchKU, "context switch - kernel/user");
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Measure(ContextSwitchKK, "context switch - kernel/kernel");
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Measure(SemaContextSwitchUU, "sema context switch - user/user");
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Measure(SemaContextSwitchUK, "sema context switch - user/kernel");
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Measure(SemaContextSwitchKU, "sema context switch - kernel/user");
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Measure(SemaContextSwitchKK, "sema context switch - kernel/kernel");
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PR_DestroyLock(lock);
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PR_DestroyMonitor(mon);
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PR_DestroyMonitor(mon2);
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PR_Cleanup();
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return 0;
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}
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