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262 lines
8.3 KiB
C
262 lines
8.3 KiB
C
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is the Netscape Portable Runtime (NSPR).
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998-2000
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/*
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** File: lockfile.c
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** Purpose: test basic locking functions
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** Just because this times stuff, don't think its a perforamnce
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** test!!!
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**
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** Modification History:
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** 19-May-97 AGarcia- Converted the test to accomodate the debug_mode flag.
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** The debug mode will print all of the printfs associated with this test.
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** The regress mode will be the default mode. Since the regress tool limits
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** the output to a one line status:PASS or FAIL,all of the printf statements
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** have been handled with an if (debug_mode) statement.
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** 04-June-97 AGarcia removed the Test_Result function. Regress tool has been updated to
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** recognize the return code from tha main program.
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***********************************************************************/
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/***********************************************************************
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** Includes
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***********************************************************************/
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/* Used to get the command line option */
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#include "plgetopt.h"
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#include "prcmon.h"
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#include "prerror.h"
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#include "prinit.h"
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#include "prinrval.h"
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#include "prlock.h"
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#include "prlog.h"
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#include "prmon.h"
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#include "prthread.h"
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#include "prtypes.h"
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#include "private/pprio.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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PRIntn failed_already=0;
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PRIntn debug_mode;
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const static PRIntervalTime contention_interval = 50;
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typedef struct LockContentious_s {
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PRLock *ml;
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PRInt32 loops;
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PRIntervalTime overhead;
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PRIntervalTime interval;
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} LockContentious_t;
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#define LOCKFILE "prlock.fil"
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static PRIntervalTime NonContentiousLock(PRInt32 loops)
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{
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PRFileDesc *_lockfile;
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while (loops-- > 0)
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{
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_lockfile = PR_Open(LOCKFILE, PR_CREATE_FILE|PR_RDWR, 0666);
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if (!_lockfile) {
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if (debug_mode) printf(
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"could not create lockfile: %d [%d]\n",
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PR_GetError(), PR_GetOSError());
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return PR_INTERVAL_NO_TIMEOUT;
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}
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PR_LockFile(_lockfile);
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PR_UnlockFile(_lockfile);
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PR_Close(_lockfile);
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}
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return 0;
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} /* NonContentiousLock */
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static void PR_CALLBACK LockContender(void *arg)
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{
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LockContentious_t *contention = (LockContentious_t*)arg;
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PRFileDesc *_lockfile;
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while (contention->loops-- > 0)
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{
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_lockfile = PR_Open(LOCKFILE, PR_CREATE_FILE|PR_RDWR, 0666);
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if (!_lockfile) {
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if (debug_mode) printf(
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"could not create lockfile: %d [%d]\n",
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PR_GetError(), PR_GetOSError());
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break;
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}
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PR_LockFile(_lockfile);
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PR_Sleep(contention->interval);
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PR_UnlockFile(_lockfile);
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PR_Close(_lockfile);
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}
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} /* LockContender */
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/*
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** Win16 requires things passed to Threads not be on the stack
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*/
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static LockContentious_t contention;
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static PRIntervalTime ContentiousLock(PRInt32 loops)
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{
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PRStatus status;
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PRThread *thread = NULL;
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PRIntervalTime overhead, timein = PR_IntervalNow();
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contention.loops = loops;
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contention.overhead = 0;
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contention.ml = PR_NewLock();
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contention.interval = contention_interval;
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thread = PR_CreateThread(
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PR_USER_THREAD, LockContender, &contention,
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PR_PRIORITY_LOW, PR_LOCAL_THREAD, PR_JOINABLE_THREAD, 0);
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PR_ASSERT(thread != NULL);
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overhead = PR_IntervalNow() - timein;
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while (contention.loops > 0)
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{
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PR_Lock(contention.ml);
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contention.overhead += contention.interval;
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PR_Sleep(contention.interval);
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PR_Unlock(contention.ml);
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}
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timein = PR_IntervalNow();
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status = PR_JoinThread(thread);
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PR_DestroyLock(contention.ml);
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overhead += (PR_IntervalNow() - timein);
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return overhead + contention.overhead;
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} /* ContentiousLock */
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static PRIntervalTime Test(
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const char* msg, PRIntervalTime (*test)(PRInt32 loops),
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PRInt32 loops, PRIntervalTime overhead)
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{
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/*
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* overhead - overhead not measured by the test.
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* duration - wall clock time it took to perform test.
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* predicted - extra time test says should not be counted
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*
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* Time accountable to the test is duration - overhead - predicted
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* All times are Intervals and accumulated for all iterations.
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*/
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PRFloat64 elapsed;
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PRIntervalTime accountable, duration;
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PRUintn spaces = strlen(msg);
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PRIntervalTime timeout, timein = PR_IntervalNow();
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PRIntervalTime predicted = test(loops);
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timeout = PR_IntervalNow();
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duration = timeout - timein;
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accountable = duration - predicted;
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accountable -= overhead;
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elapsed = (PRFloat64)PR_IntervalToMicroseconds(accountable);
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if (debug_mode) printf("%s:", msg);
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while (spaces++ < 50) if (debug_mode) printf(" ");
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if ((PRInt32)accountable < 0) {
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if (debug_mode) printf("*****.** usecs/iteration\n");
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} else {
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if (debug_mode) printf("%8.2f usecs/iteration\n", elapsed/loops);
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}
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return duration;
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} /* Test */
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int main(int argc, char **argv)
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{
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PRIntervalTime duration;
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PRUint32 cpu, cpus = 2;
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PRInt32 loops = 100;
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/* The command line argument: -d is used to determine if the test is being run
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in debug mode. The regress tool requires only one line output:PASS or FAIL.
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All of the printfs associated with this test has been handled with a if (debug_mode)
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test.
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Usage: test_name -d
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*/
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PLOptStatus os;
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PLOptState *opt = PL_CreateOptState(argc, argv, "d:");
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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_mode = 1;
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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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/* main test */
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PR_Init(PR_USER_THREAD, PR_PRIORITY_NORMAL, 0);
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PR_STDIO_INIT();
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if (argc > 1) loops = atoi(argv[1]);
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if (loops == 0) loops = 100;
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if (debug_mode) printf("Lock: Using %d loops\n", loops);
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cpus = (argc < 3) ? 2 : atoi(argv[2]);
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if (cpus == 0) cpus = 2;
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if (debug_mode) printf("Lock: Using %d cpu(s)\n", cpus);
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for (cpu = 1; cpu <= cpus; ++cpu)
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{
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if (debug_mode) printf("\nLockFile: Using %d CPU(s)\n", cpu);
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PR_SetConcurrency(cpu);
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duration = Test("LockFile non-contentious locking/unlocking", NonContentiousLock, loops, 0);
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(void)Test("LockFile contentious locking/unlocking", ContentiousLock, loops, duration);
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}
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PR_Delete(LOCKFILE); /* try to get rid of evidence */
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if (debug_mode) printf("%s: test %s\n", "Lock(mutex) test", ((failed_already) ? "failed" : "passed"));
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if(failed_already)
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return 1;
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else
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return 0;
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} /* main */
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/* testlock.c */
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