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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 1.0 (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: lockfile.c
- ** Purpose: test basic locking functions
- ** Just because this times stuff, don't think its a perforamnce
- ** test!!!
- **
- ** Modification History:
- ** 19-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.
- ***********************************************************************/
- /***********************************************************************
- ** Includes
- ***********************************************************************/
- /* Used to get the command line option */
- #include "plgetopt.h"
-
- #include "prcmon.h"
- #include "prerror.h"
- #include "prinit.h"
- #include "prinrval.h"
- #include "prlock.h"
- #include "prlog.h"
- #include "prmon.h"
- #include "prthread.h"
- #include "prtypes.h"
-
- #ifndef XP_MAC
- #include "private/pprio.h"
- #else
- #include "pprio.h"
- #endif
-
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
-
- #ifdef XP_MAC
- #include "prlog.h"
- #define printf PR_LogPrint
- extern void SetupMacPrintfLog(char *logFile);
- #endif
-
- PRIntn failed_already=0;
- PRIntn debug_mode;
-
- const static PRIntervalTime contention_interval = 50;
-
- typedef struct LockContentious_s {
- PRLock *ml;
- PRUint32 loops;
- PRIntervalTime overhead;
- PRIntervalTime interval;
- } LockContentious_t;
-
- #define LOCKFILE "prlock.fil"
-
-
-
- static PRIntervalTime NonContentiousLock(PRUint32 loops)
- {
- PRFileDesc *_lockfile;
- while (loops-- > 0)
- {
- _lockfile = PR_Open(LOCKFILE, PR_CREATE_FILE|PR_RDWR, 0666);
- if (!_lockfile) {
- if (debug_mode) printf(
- "could not create lockfile: %d [%d]\n",
- PR_GetError(), PR_GetOSError());
- return PR_INTERVAL_NO_TIMEOUT;
- }
- PR_LockFile(_lockfile);
- PR_UnlockFile(_lockfile);
- PR_Close(_lockfile);
- }
- return 0;
- } /* NonContentiousLock */
-
- static void PR_CALLBACK LockContender(void *arg)
- {
- LockContentious_t *contention = (LockContentious_t*)arg;
- PRFileDesc *_lockfile;
- while (contention->loops-- > 0)
- {
- _lockfile = PR_Open(LOCKFILE, PR_CREATE_FILE|PR_RDWR, 0666);
- if (!_lockfile) {
- if (debug_mode) printf(
- "could not create lockfile: %d [%d]\n",
- PR_GetError(), PR_GetOSError());
- break;
- }
- PR_LockFile(_lockfile);
- PR_Sleep(contention->interval);
- PR_UnlockFile(_lockfile);
- PR_Close(_lockfile);
- }
-
- } /* LockContender */
-
- /*
- ** Win16 requires things passed to Threads not be on the stack
- */
- static LockContentious_t contention;
-
- static PRIntervalTime ContentiousLock(PRUint32 loops)
- {
- PRStatus status;
- PRThread *thread = NULL;
- PRIntervalTime overhead, timein = PR_IntervalNow();
-
- 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.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);
- return overhead + contention.overhead;
- } /* ContentiousLock */
-
- static PRIntervalTime Test(
- const char* msg, PRIntervalTime (*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 = strlen(msg);
- PRIntervalTime timeout, timein = PR_IntervalNow();
- PRIntervalTime predicted = test(loops);
- timeout = PR_IntervalNow();
- duration = timeout - timein;
- accountable = duration - predicted;
- accountable -= overhead;
- elapsed = (PRFloat64)PR_IntervalToMicroseconds(accountable);
- if (debug_mode) printf("%s:", msg);
- while (spaces++ < 50) if (debug_mode) printf(" ");
- if ((PRInt32)accountable < 0)
- if (debug_mode) printf("*****.** usecs/iteration\n");
- else
- if (debug_mode) printf("%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;
-
-
- /* 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.
- Usage: test_name -d
- */
- PLOptStatus os;
- PLOptState *opt = PL_CreateOptState(argc, argv, "d:");
- while (PL_OPT_EOL != (os = PL_GetNextOpt(opt)))
- {
- if (PL_OPT_BAD == os) continue;
- switch (opt->option)
- {
- case 'd': /* debug mode */
- debug_mode = 1;
- break;
- default:
- break;
- }
- }
- PL_DestroyOptState(opt);
-
- /* main test */
-
- PR_Init(PR_USER_THREAD, PR_PRIORITY_NORMAL, 0);
- PR_STDIO_INIT();
-
- #ifdef XP_MAC
- SetupMacPrintfLog("lockfile.log");
- debug_mode = 1;
- #endif
-
- if (argc > 1) loops = atoi(argv[1]);
- if (loops == 0) loops = 100;
- if (debug_mode) printf("Lock: Using %d loops\n", loops);
-
- cpus = (argc < 3) ? 2 : atoi(argv[2]);
- if (cpus == 0) cpus = 2;
- if (debug_mode) printf("Lock: Using %d cpu(s)\n", cpus);
-
-
- for (cpu = 1; cpu <= cpus; ++cpu)
- {
- if (debug_mode) printf("\nLockFile: Using %d CPU(s)\n", cpu);
- PR_SetConcurrency(cpu);
-
- (void)Test("LockFile non-contentious locking/unlocking", NonContentiousLock, loops, 0);
- (void)Test("LockFile contentious locking/unlocking", ContentiousLock, loops, duration);
- }
-
- PR_Delete(LOCKFILE); /* try to get rid of evidence */
-
- if (debug_mode) printf("%s: test %s\n", "Lock(mutex) test", ((rv) ? "passed" : "failed"));
- else {
- if (!rv)
- failed_already=1;
- }
- if(failed_already)
- return 1;
- else
- return 0;
- } /* main */
-
- /* testlock.c */
-