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pjs/nsprpub/pr/tests/lock.c

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C
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/*
* The contents of this file are subject to the Netscape Public License
* Version 1.1 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
/*
** File: lock.c
** Purpose: test basic locking functions
**
** Modification History:
** 14-May-97 AGarcia- Converted the test to accomodate the debug_mode flag.
** The debug mode will print all of the printfs associated with this test.
** The regress mode will be the default mode. Since the regress tool limits
** the output to a one line status:PASS or FAIL,all of the printf statements
** have been handled with an if (debug_mode) statement.
** 04-June-97 AGarcia removed the Test_Result function. Regress tool has been updated to
** recognize the return code from tha main program.
**
** 11-Aug-97 LarryH. Win16 port of NSPR.
** - Added "PASS", "FAIL" messages on completion.
** - Change stack variables to static scope variables
** because of shadow-stack use by Win16
** - Added PR_CALLBACK attribute to functions called by NSPR
** - Added command line arguments:
** - l <num> to control the number of loops
** - c <num> to control the number of CPUs.
** (was positional argv).
**
**
***********************************************************************/
/***********************************************************************
** Includes
***********************************************************************/
/* Used to get the command line option */
#include "plgetopt.h"
#include "prio.h"
#include "prcmon.h"
#include "prinit.h"
#include "prinrval.h"
#include "prprf.h"
#include "prlock.h"
#include "prlog.h"
#include "prmon.h"
#include "prmem.h"
#include "prthread.h"
#include "prtypes.h"
#include "plstr.h"
#include <stdlib.h>
#if defined(XP_UNIX)
#include <string.h>
#endif
#ifdef XP_MAC
#include "prlog.h"
#define printf PR_LogPrint
extern void SetupMacPrintfLog(char *logFile);
#endif
static PRIntn failed_already=0;
static PRFileDesc *std_err = NULL;
static PRBool verbosity = PR_FALSE;
static PRBool debug_mode = PR_FALSE;
const static PRIntervalTime contention_interval = 50;
typedef struct LockContentious_s {
PRLock *ml;
PRInt32 loops;
PRUint32 contender;
PRUint32 contentious;
PRIntervalTime overhead;
PRIntervalTime interval;
} LockContentious_t;
typedef struct MonitorContentious_s {
PRMonitor *ml;
PRInt32 loops;
PRUint32 contender;
PRUint32 contentious;
PRIntervalTime overhead;
PRIntervalTime interval;
} MonitorContentious_t;
static PRIntervalTime Sleeper(PRUint32 loops)
{
PRIntervalTime predicted = 0;
while (loops-- > 0)
{
predicted += contention_interval;
(void)PR_Sleep(contention_interval);
}
return predicted;
} /* Sleeper */
/*
** BASIC LOCKS
*/
static PRIntervalTime MakeLock(PRUint32 loops)
{
PRLock *ml = NULL;
while (loops-- > 0)
{
ml = PR_NewLock();
PR_DestroyLock(ml);
ml = NULL;
}
return 0;
} /* MakeLock */
static PRIntervalTime NonContentiousLock(PRUint32 loops)
{
PRLock *ml = NULL;
ml = PR_NewLock();
while (loops-- > 0)
{
PR_Lock(ml);
PR_Unlock(ml);
}
PR_DestroyLock(ml);
return 0;
} /* NonContentiousLock */
static void PR_CALLBACK LockContender(void *arg)
{
LockContentious_t *contention = (LockContentious_t*)arg;
while (contention->loops-- > 0)
{
PR_Lock(contention->ml);
contention->contender+= 1;
contention->overhead += contention->interval;
PR_Sleep(contention->interval);
PR_Unlock(contention->ml);
}
} /* LockContender */
static PRIntervalTime ContentiousLock(PRUint32 loops)
{
PRStatus status;
PRThread *thread = NULL;
LockContentious_t * contention;
PRIntervalTime rv, overhead, timein = PR_IntervalNow();
contention = PR_NEWZAP(LockContentious_t);
contention->loops = loops;
contention->overhead = 0;
contention->ml = PR_NewLock();
contention->interval = contention_interval;
thread = PR_CreateThread(
PR_USER_THREAD, LockContender, contention,
PR_PRIORITY_LOW, PR_LOCAL_THREAD, PR_JOINABLE_THREAD, 0);
PR_ASSERT(thread != NULL);
overhead = PR_IntervalNow() - timein;
while (contention->loops-- > 0)
{
PR_Lock(contention->ml);
contention->contentious+= 1;
contention->overhead += contention->interval;
PR_Sleep(contention->interval);
PR_Unlock(contention->ml);
}
timein = PR_IntervalNow();
status = PR_JoinThread(thread);
PR_DestroyLock(contention->ml);
overhead += (PR_IntervalNow() - timein);
rv = overhead + contention->overhead;
if (verbosity)
PR_fprintf(
std_err, "Access ratio: %u to %u\n",
contention->contentious, contention->contender);
PR_Free(contention);
return rv;
} /* ContentiousLock */
/*
** MONITORS
*/
static PRIntervalTime MakeMonitor(PRUint32 loops)
{
PRMonitor *ml = NULL;
while (loops-- > 0)
{
ml = PR_NewMonitor();
PR_DestroyMonitor(ml);
ml = NULL;
}
return 0;
} /* MakeMonitor */
static PRIntervalTime NonContentiousMonitor(PRUint32 loops)
{
PRMonitor *ml = NULL;
ml = PR_NewMonitor();
while (loops-- > 0)
{
PR_EnterMonitor(ml);
PR_ExitMonitor(ml);
}
PR_DestroyMonitor(ml);
return 0;
} /* NonContentiousMonitor */
static void PR_CALLBACK TryEntry(void *arg)
{
PRMonitor *ml = (PRMonitor*)arg;
if (debug_mode) PR_fprintf(std_err, "Reentrant thread created\n");
PR_EnterMonitor(ml);
if (debug_mode) PR_fprintf(std_err, "Reentrant thread acquired monitor\n");
PR_ExitMonitor(ml);
if (debug_mode) PR_fprintf(std_err, "Reentrant thread released monitor\n");
} /* TryEntry */
static PRIntervalTime ReentrantMonitor(PRUint32 loops)
{
PRStatus status;
PRThread *thread;
PRMonitor *ml = PR_NewMonitor();
if (debug_mode) PR_fprintf(std_err, "\nMonitor created for reentrant test\n");
PR_EnterMonitor(ml);
PR_EnterMonitor(ml);
if (debug_mode) PR_fprintf(std_err, "Monitor acquired twice\n");
thread = PR_CreateThread(
PR_USER_THREAD, TryEntry, ml,
PR_PRIORITY_LOW, PR_LOCAL_THREAD, PR_JOINABLE_THREAD, 0);
PR_ASSERT(thread != NULL);
PR_Sleep(PR_SecondsToInterval(1));
PR_ExitMonitor(ml);
if (debug_mode) PR_fprintf(std_err, "Monitor released first time\n");
PR_ExitMonitor(ml);
if (debug_mode) PR_fprintf(std_err, "Monitor released second time\n");
status = PR_JoinThread(thread);
if (debug_mode) PR_fprintf(std_err,
"Reentrant thread joined %s\n",
(status == PR_SUCCESS) ? "successfully" : "in error");
PR_DestroyMonitor(ml);
return 0;
} /* ReentrantMonitor */
static void PR_CALLBACK MonitorContender(void *arg)
{
MonitorContentious_t *contention = (MonitorContentious_t*)arg;
while (contention->loops-- > 0)
{
PR_EnterMonitor(contention->ml);
contention->contender+= 1;
contention->overhead += contention->interval;
PR_Sleep(contention->interval);
PR_ExitMonitor(contention->ml);
}
} /* MonitorContender */
static PRUint32 ContentiousMonitor(PRUint32 loops)
{
PRStatus status;
PRThread *thread = NULL;
MonitorContentious_t * contention;
PRIntervalTime rv, overhead, timein = PR_IntervalNow();
contention = PR_NEWZAP(MonitorContentious_t);
contention->loops = loops;
contention->overhead = 0;
contention->ml = PR_NewMonitor();
contention->interval = contention_interval;
thread = PR_CreateThread(
PR_USER_THREAD, MonitorContender, contention,
PR_PRIORITY_LOW, PR_LOCAL_THREAD, PR_JOINABLE_THREAD, 0);
PR_ASSERT(thread != NULL);
overhead = PR_IntervalNow() - timein;
while (contention->loops-- > 0)
{
PR_EnterMonitor(contention->ml);
contention->contentious+= 1;
contention->overhead += contention->interval;
PR_Sleep(contention->interval);
PR_ExitMonitor(contention->ml);
}
timein = PR_IntervalNow();
status = PR_JoinThread(thread);
PR_DestroyMonitor(contention->ml);
overhead += (PR_IntervalNow() - timein);
rv = overhead + contention->overhead;
if (verbosity)
PR_fprintf(
std_err, "Access ratio: %u to %u\n",
contention->contentious, contention->contender);
PR_Free(contention);
return rv;
} /* ContentiousMonitor */
/*
** CACHED MONITORS
*/
static PRIntervalTime NonContentiousCMonitor(PRUint32 loops)
{
MonitorContentious_t contention;
while (loops-- > 0)
{
PR_CEnterMonitor(&contention);
PR_CExitMonitor(&contention);
}
return 0;
} /* NonContentiousCMonitor */
static void PR_CALLBACK Contender(void *arg)
{
MonitorContentious_t *contention = (MonitorContentious_t*)arg;
while (contention->loops-- > 0)
{
PR_CEnterMonitor(contention);
contention->contender+= 1;
contention->overhead += contention->interval;
PR_Sleep(contention->interval);
PR_CExitMonitor(contention);
}
} /* Contender */
static PRIntervalTime ContentiousCMonitor(PRUint32 loops)
{
PRStatus status;
PRThread *thread = NULL;
MonitorContentious_t * contention;
PRIntervalTime overhead, timein = PR_IntervalNow();
contention = PR_NEWZAP(MonitorContentious_t);
contention->ml = NULL;
contention->loops = loops;
contention->interval = contention_interval;
thread = PR_CreateThread(
PR_USER_THREAD, Contender, contention,
PR_PRIORITY_LOW, PR_LOCAL_THREAD, PR_JOINABLE_THREAD, 0);
PR_ASSERT(thread != NULL);
overhead = PR_IntervalNow() - timein;
while (contention->loops-- > 0)
{
PR_CEnterMonitor(contention);
contention->contentious+= 1;
contention->overhead += contention->interval;
PR_Sleep(contention->interval);
PR_CExitMonitor(contention);
}
timein = PR_IntervalNow();
status = PR_JoinThread(thread);
overhead += (PR_IntervalNow() - timein);
overhead += overhead + contention->overhead;
if (verbosity)
PR_fprintf(
std_err, "Access ratio: %u to %u\n",
contention->contentious, contention->contender);
PR_Free(contention);
return overhead;
} /* ContentiousCMonitor */
static PRIntervalTime Test(
const char* msg, PRUint32 (*test)(PRUint32 loops),
PRUint32 loops, PRIntervalTime overhead)
{
/*
* overhead - overhead not measured by the test.
* duration - wall clock time it took to perform test.
* predicted - extra time test says should not be counted
*
* Time accountable to the test is duration - overhead - predicted
* All times are Intervals and accumulated for all iterations.
*/
PRFloat64 elapsed;
PRIntervalTime accountable, duration;
PRUintn spaces = PL_strlen(msg);
PRIntervalTime timeout, timein = PR_IntervalNow();
PRIntervalTime predicted = test(loops);
timeout = PR_IntervalNow();
duration = timeout - timein;
if (debug_mode)
{
accountable = duration - predicted;
accountable -= overhead;
elapsed = (PRFloat64)PR_IntervalToMicroseconds(accountable);
PR_fprintf(PR_STDOUT, "%s:", msg);
while (spaces++ < 50) PR_fprintf(PR_STDOUT, " ");
if ((PRInt32)accountable < 0)
PR_fprintf(PR_STDOUT, "*****.** usecs/iteration\n");
else
PR_fprintf(PR_STDOUT, "%8.2f usecs/iteration\n", elapsed/loops);
}
return duration;
} /* Test */
int main(int argc, char **argv)
{
PRBool rv = PR_TRUE;
PRIntervalTime duration;
PRUint32 cpu, cpus = 2, loops = 100;
PR_STDIO_INIT();
PR_Init(PR_USER_THREAD, PR_PRIORITY_NORMAL, 0);
{
/* The command line argument: -d is used to determine if the test is being run
in debug mode. The regress tool requires only one line output:PASS or FAIL.
All of the printfs associated with this test has been handled with a if (debug_mode)
test.
Command line argument -l <num> sets the number of loops.
Command line argument -c <num> sets the number of cpus.
Usage: lock [-d] [-l <num>] [-c <num>]
*/
PLOptStatus os;
PLOptState *opt = PL_CreateOptState(argc, argv, "dvl:c:");
while (PL_OPT_EOL != (os = PL_GetNextOpt(opt)))
{
if (PL_OPT_BAD == os) continue;
switch (opt->option)
{
case 'd': /* debug mode */
debug_mode = PR_TRUE;
break;
case 'v': /* debug mode */
verbosity = PR_TRUE;
break;
case 'l': /* number of loops */
loops = atoi(opt->value);
break;
case 'c': /* number of cpus */
cpus = atoi(opt->value);
break;
default:
break;
}
}
PL_DestroyOptState(opt);
}
/* main test */
PR_SetConcurrency(8);
#ifdef XP_MAC
SetupMacPrintfLog("lock.log");
debug_mode = 1;
#endif
if (loops == 0) loops = 100;
if (debug_mode)
{
std_err = PR_STDERR;
PR_fprintf(std_err, "Lock: Using %d loops\n", loops);
}
if (cpus == 0) cpus = 2;
if (debug_mode) PR_fprintf(std_err, "Lock: Using %d cpu(s)\n", cpus);
(void)Sleeper(10); /* try filling in the caches */
for (cpu = 1; cpu <= cpus; ++cpu)
{
if (debug_mode) PR_fprintf(std_err, "\nLock: Using %d CPU(s)\n", cpu);
PR_SetConcurrency(cpu);
duration = Test("Overhead of PR_Sleep", Sleeper, loops, 0);
duration = 0;
(void)Test("Lock creation/deletion", MakeLock, loops, 0);
(void)Test("Lock non-contentious locking/unlocking", NonContentiousLock, loops, 0);
(void)Test("Lock contentious locking/unlocking", ContentiousLock, loops, duration);
(void)Test("Monitor creation/deletion", MakeMonitor, loops, 0);
(void)Test("Monitor non-contentious locking/unlocking", NonContentiousMonitor, loops, 0);
(void)Test("Monitor contentious locking/unlocking", ContentiousMonitor, loops, duration);
(void)Test("Cached monitor non-contentious locking/unlocking", NonContentiousCMonitor, loops, 0);
(void)Test("Cached monitor contentious locking/unlocking", ContentiousCMonitor, loops, duration);
(void)ReentrantMonitor(loops);
}
if (debug_mode)
PR_fprintf(
std_err, "%s: test %s\n", "Lock(mutex) test",
((rv) ? "passed" : "failed"));
else {
if (!rv)
failed_already=1;
}
if(failed_already)
{
PR_fprintf(PR_STDOUT, "FAIL\n");
return 1;
}
else
{
PR_fprintf(PR_STDOUT, "PASS\n");
return 0;
}
} /* main */
/* testlock.c */
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