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gecko-dev/nsprpub/pr/tests/ranfile.c

391 строка
13 KiB
C
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/* -*- 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/. */
/***********************************************************************
**
** Contact: AOF<freier@netscape.com>
**
** Name: ranfile.c
**
** Description: Test to hammer on various components of NSPR
** Modification History:
** 20-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 "prinit.h"
#include "prthread.h"
#include "prlock.h"
#include "prcvar.h"
#include "prmem.h"
#include "prinrval.h"
#include "prio.h"
#include <string.h>
#include <stdio.h>
static PRIntn debug_mode = 0;
static PRIntn failed_already=0;
static PRThreadScope thread_scope = PR_LOCAL_THREAD;
typedef enum {sg_go, sg_stop, sg_done} Action;
typedef enum {sg_okay, sg_open, sg_close, sg_delete, sg_write, sg_seek} Problem;
typedef struct Hammer_s {
PRLock *ml;
PRCondVar *cv;
PRUint32 id;
PRUint32 limit;
PRUint32 writes;
PRThread *thread;
PRIntervalTime timein;
Action action;
Problem problem;
} Hammer_t;
#define DEFAULT_LIMIT 10
#define DEFAULT_THREADS 2
#define DEFAULT_LOOPS 1
static PRInt32 pageSize = 1024;
static const char* baseName = "./";
static const char *programName = "Random File";
/***********************************************************************
** PRIVATE FUNCTION: RandomNum
** DESCRIPTION:
** Generate a pseudo-random number
** INPUTS: None
** OUTPUTS: None
** RETURN: A pseudo-random unsigned number, 32-bits wide
** SIDE EFFECTS:
** Updates random seed (a static)
** RESTRICTIONS:
** None
** MEMORY: NA
** ALGORITHM:
** Uses the current interval timer value, promoted to a 64 bit
** float as a multiplier for a static residue (which begins
** as an uninitialized variable). The result is bits [16..48)
** of the product. Seed is then updated with the return value
** promoted to a float-64.
***********************************************************************/
static PRUint32 RandomNum(void)
{
PRUint32 rv;
PRUint64 shift;
static PRFloat64 seed = 0x58a9382; /* Just make sure it isn't 0! */
PRFloat64 random = seed * (PRFloat64)PR_IntervalNow();
LL_USHR(shift, *((PRUint64*)&random), 16);
LL_L2UI(rv, shift);
seed = (PRFloat64)rv;
return rv;
} /* RandomNum */
/***********************************************************************
** PRIVATE FUNCTION: Thread
** DESCRIPTION:
** Hammer on the file I/O system
** INPUTS: A pointer to the thread's private data
** OUTPUTS: None
** RETURN: None
** SIDE EFFECTS:
** Creates, accesses and deletes a file
** RESTRICTIONS:
** (Currently) must have file create permission in "/usr/tmp".
** MEMORY: NA
** ALGORITHM:
** This function is a root of a thread
** 1) Creates a (hopefully) unique file in /usr/tmp/
** 2) Writes a zero to a random number of sequential pages
** 3) Closes the file
** 4) Reopens the file
** 5) Seeks to a random page within the file
** 6) Writes a one byte on that page
** 7) Repeat steps [5..6] for each page in the file
** 8) Close and delete the file
** 9) Repeat steps [1..8] until told to stop
** 10) Notify complete and return
***********************************************************************/
static void PR_CALLBACK Thread(void *arg)
{
PRUint32 index;
char filename[30];
const char zero = 0;
PRFileDesc *file = NULL;
PRStatus rv = PR_SUCCESS;
Hammer_t *cd = (Hammer_t*)arg;
(void)sprintf(filename, "%ssg%04ld.dat", baseName, cd->id);
if (debug_mode) printf("Starting work on %s\n", filename);
while (PR_TRUE)
{
PRUint32 bytes;
PRUint32 minor = (RandomNum() % cd->limit) + 1;
PRUint32 random = (RandomNum() % cd->limit) + 1;
PRUint32 pages = (RandomNum() % cd->limit) + 10;
while (minor-- > 0)
{
cd->problem = sg_okay;
if (cd->action != sg_go) goto finished;
cd->problem = sg_open;
file = PR_Open(filename, PR_RDWR|PR_CREATE_FILE, 0666);
if (file == NULL) goto finished;
for (index = 0; index < pages; index++)
{
cd->problem = sg_okay;
if (cd->action != sg_go) goto close;
cd->problem = sg_seek;
bytes = PR_Seek(file, pageSize * index, PR_SEEK_SET);
if (bytes != pageSize * index) goto close;
cd->problem = sg_write;
bytes = PR_Write(file, &zero, sizeof(zero));
if (bytes <= 0) goto close;
cd->writes += 1;
}
cd->problem = sg_close;
rv = PR_Close(file);
if (rv != PR_SUCCESS) goto purge;
cd->problem = sg_okay;
if (cd->action != sg_go) goto purge;
cd->problem = sg_open;
file = PR_Open(filename, PR_RDWR, 0666);
for (index = 0; index < pages; index++)
{
cd->problem = sg_okay;
if (cd->action != sg_go) goto close;
cd->problem = sg_seek;
bytes = PR_Seek(file, pageSize * index, PR_SEEK_SET);
if (bytes != pageSize * index) goto close;
cd->problem = sg_write;
bytes = PR_Write(file, &zero, sizeof(zero));
if (bytes <= 0) goto close;
cd->writes += 1;
random = (random + 511) % pages;
}
cd->problem = sg_close;
rv = PR_Close(file);
if (rv != PR_SUCCESS) goto purge;
cd->problem = sg_delete;
rv = PR_Delete(filename);
if (rv != PR_SUCCESS) goto finished;
}
}
close:
(void)PR_Close(file);
purge:
(void)PR_Delete(filename);
finished:
PR_Lock(cd->ml);
cd->action = sg_done;
PR_NotifyCondVar(cd->cv);
PR_Unlock(cd->ml);
if (debug_mode) printf("Ending work on %s\n", filename);
return;
} /* Thread */
static Hammer_t hammer[100];
static PRCondVar *cv;
/***********************************************************************
** PRIVATE FUNCTION: main
** DESCRIPTION:
** Hammer on the file I/O system
** INPUTS: The usual argc and argv
** argv[0] - program name (not used)
** argv[1] - the number of times to execute the major loop
** argv[2] - the number of threads to toss into the batch
** argv[3] - the clipping number applied to randoms
** default values: loops = 2, threads = 10, limit = 57
** OUTPUTS: None
** RETURN: None
** SIDE EFFECTS:
** Creates, accesses and deletes lots of files
** RESTRICTIONS:
** (Currently) must have file create permission in "/usr/tmp".
** MEMORY: NA
** ALGORITHM:
** 1) Fork a "Thread()"
** 2) Wait for 'interleave' seconds
** 3) For [0..'threads') repeat [1..2]
** 4) Mark all objects to stop
** 5) Collect the threads, accumulating the results
** 6) For [0..'loops') repeat [1..5]
** 7) Print accumulated results and exit
**
** Characteristic output (from IRIX)
** Random File: Using loops = 2, threads = 10, limit = 57
** Random File: [min [avg] max] writes/sec average
***********************************************************************/
int main(int argc, char **argv)
{
PRLock *ml;
PRUint32 id = 0;
int active, poll;
PRIntervalTime interleave;
PRIntervalTime duration = 0;
int limit = 0, loops = 0, threads = 0, times;
PRUint32 writes, writesMin = 0x7fffffff, writesTot = 0, durationTot = 0, writesMax = 0;
const char *where[] = {"okay", "open", "close", "delete", "write", "seek"};
/* 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, "Gdl:t:i:");
while (PL_OPT_EOL != (os = PL_GetNextOpt(opt)))
{
if (PL_OPT_BAD == os) continue;
switch (opt->option)
{
case 'G': /* global threads */
thread_scope = PR_GLOBAL_THREAD;
break;
case 'd': /* debug mode */
debug_mode = 1;
break;
case 'l': /* limiting number */
limit = atoi(opt->value);
break;
case 't': /* number of threads */
threads = atoi(opt->value);
break;
case 'i': /* iteration counter */
loops = atoi(opt->value);
break;
default:
break;
}
}
PL_DestroyOptState(opt);
/* main test */
PR_Init(PR_USER_THREAD, PR_PRIORITY_NORMAL, 0);
PR_STDIO_INIT();
interleave = PR_SecondsToInterval(10);
ml = PR_NewLock();
cv = PR_NewCondVar(ml);
if (loops == 0) loops = DEFAULT_LOOPS;
if (limit == 0) limit = DEFAULT_LIMIT;
if (threads == 0) threads = DEFAULT_THREADS;
if (debug_mode) printf(
"%s: Using loops = %d, threads = %d, limit = %d and %s threads\n",
programName, loops, threads, limit,
(thread_scope == PR_LOCAL_THREAD) ? "LOCAL" : "GLOBAL");
for (times = 0; times < loops; ++times)
{
if (debug_mode) printf("%s: Setting concurrency level to %d\n", programName, times + 1);
PR_SetConcurrency(times + 1);
for (active = 0; active < threads; active++)
{
hammer[active].ml = ml;
hammer[active].cv = cv;
hammer[active].id = id++;
hammer[active].writes = 0;
hammer[active].action = sg_go;
hammer[active].problem = sg_okay;
hammer[active].limit = (RandomNum() % limit) + 1;
hammer[active].timein = PR_IntervalNow();
hammer[active].thread = PR_CreateThread(
PR_USER_THREAD, Thread, &hammer[active],
PR_GetThreadPriority(PR_GetCurrentThread()),
thread_scope, PR_JOINABLE_THREAD, 0);
PR_Lock(ml);
PR_WaitCondVar(cv, interleave); /* start new ones slowly */
PR_Unlock(ml);
}
/*
* The last thread started has had the opportunity to run for
* 'interleave' seconds. Now gather them all back in.
*/
PR_Lock(ml);
for (poll = 0; poll < threads; poll++)
{
if (hammer[poll].action == sg_go) /* don't overwrite done */
hammer[poll].action = sg_stop; /* ask him to stop */
}
PR_Unlock(ml);
while (active > 0)
{
for (poll = 0; poll < threads; poll++)
{
PR_Lock(ml);
while (hammer[poll].action < sg_done)
PR_WaitCondVar(cv, PR_INTERVAL_NO_TIMEOUT);
PR_Unlock(ml);
active -= 1; /* this is another one down */
(void)PR_JoinThread(hammer[poll].thread);
hammer[poll].thread = NULL;
if (hammer[poll].problem == sg_okay)
{
duration = PR_IntervalToMilliseconds(
PR_IntervalNow() - hammer[poll].timein);
writes = hammer[poll].writes * 1000 / duration;
if (writes < writesMin)
writesMin = writes;
if (writes > writesMax)
writesMax = writes;
writesTot += hammer[poll].writes;
durationTot += duration;
}
else
if (debug_mode) printf(
"%s: test failed %s after %ld seconds\n",
programName, where[hammer[poll].problem], duration);
else failed_already=1;
}
}
}
if (debug_mode) printf(
"%s: [%ld [%ld] %ld] writes/sec average\n",
programName, writesMin, writesTot * 1000 / durationTot, writesMax);
PR_DestroyCondVar(cv);
PR_DestroyLock(ml);
if (failed_already)
{
printf("FAIL\n");
return 1;
}
else
{
printf("PASS\n");
return 0;
}
} /* main */
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