The Tor Browser: nsprpub/pr/tests/lock.c@6474c204b198 (annotated)

nsprpub/pr/tests/lock.c@6474c204b198 (annotated)

nsprpub/pr/tests/lock.c

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 /*
 ** 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
 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_ASSERT_CURRENT_THREAD_OWNS_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);
         PR_ASSERT_CURRENT_THREAD_OWNS_LOCK(contention->ml);
         contention->contender+= 1;
         contention->overhead += contention->interval;
         PR_Sleep(contention->interval);
         PR_ASSERT_CURRENT_THREAD_OWNS_LOCK(contention->ml);
         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);
         PR_ASSERT_CURRENT_THREAD_OWNS_LOCK(contention->ml);
         contention->contentious+= 1;
         contention->overhead += contention->interval;
         PR_Sleep(contention->interval);
         PR_ASSERT_CURRENT_THREAD_OWNS_LOCK(contention->ml);
         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_ASSERT_CURRENT_THREAD_IN_MONITOR(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);
     PR_ASSERT_CURRENT_THREAD_IN_MONITOR(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_ASSERT_CURRENT_THREAD_IN_MONITOR(ml);
     PR_EnterMonitor(ml);
     PR_ASSERT_CURRENT_THREAD_IN_MONITOR(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_ASSERT_CURRENT_THREAD_IN_MONITOR(ml);
     PR_ExitMonitor(ml);
     PR_ASSERT_CURRENT_THREAD_IN_MONITOR(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);
         PR_ASSERT_CURRENT_THREAD_IN_MONITOR(contention->ml);
         contention->contender+= 1;
         contention->overhead += contention->interval;
         PR_Sleep(contention->interval);
         PR_ASSERT_CURRENT_THREAD_IN_MONITOR(contention->ml);
         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);
         PR_ASSERT_CURRENT_THREAD_IN_MONITOR(contention->ml);
         contention->contentious+= 1;
         contention->overhead += contention->interval;
         PR_Sleep(contention->interval);
         PR_ASSERT_CURRENT_THREAD_IN_MONITOR(contention->ml);
         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);
     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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nsprpub/pr/tests/lock.c@6474c204b198 (annotated)

nsprpub/pr/tests/lock.c