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/*******************************************************************************
* The BYTE UNIX Benchmarks - Release 3
* Module: fstime.c SID: 3.5 5/15/91 19:30:19
*
*******************************************************************************
* Bug reports, patches, comments, suggestions should be sent to:
*
* Ben Smith, Rick Grehan or Tom Yager
* [email protected] [email protected] [email protected]
*
*******************************************************************************
* Modification Log:
* $Header: fstime.c,v 3.4 87/06/22 14:23:05 kjmcdonell Beta $
* 10/19/89 - rewrote timing calcs and added clock check (Ben Smith)
* 10/26/90 - simplify timing, change defaults (Tom Yager)
* 11/16/90 - added better error handling and changed output format (Ben Smith)
* 11/17/90 - changed the whole thing around (Ben Smith)
* 2/22/91 - change a few style elements and improved error handling (Ben Smith)
* 4/17/91 - incorporated suggestions from Seckin Unlu ([email protected])
* 4/17/91 - limited size of file, will rewind when reaches end of file
* 7/95 - fixed mishandling of read() and write() return codes
* Carl Emilio Prelz <[email protected]>
* 12/95 - Massive changes. Made sleep time proportional increase with run
* time; added fsbuffer and fsdisk variants; added partial counting
* of partial reads/writes (was *full* credit); added dual syncs.
* David C Niemi <[email protected]>
* 10/22/97 - code cleanup to remove ANSI C compiler warnings
* Andy Kahn <[email protected]>
* 9/24/07 - Separate out the read and write tests;
* output the actual time used in the results.
* Ian Smith <johantheghost at yahoo period com>
******************************************************************************/
char SCCSid[] = "@(#) @(#)fstime.c:3.5 -- 5/15/91 19:30:19";
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/time.h>
#define SECONDS 10
#define MAX_BUFSIZE 8192
/* This must be set to the smallest BUFSIZE or 1024, whichever is smaller */
#define COUNTSIZE 256
#define HALFCOUNT (COUNTSIZE/2) /* Half of COUNTSIZE */
#define FNAME0 "dummy0"
#define FNAME1 "dummy1"
extern void sync(void);
int w_test(int timeSecs);
int r_test(int timeSecs);
int c_test(int timeSecs);
long read_score = 1, write_score = 1, copy_score = 1;
/****************** GLOBALS ***************************/
/* The buffer size for the tests. */
int bufsize = 1024;
/*
* The max number of 1024-byte blocks in the file.
* Don't limit it much, so that memory buffering
* can be overcome.
*/
int max_blocks = 2000;
/* The max number of BUFSIZE blocks in the file. */
int max_buffs = 2000;
/* Countable units per 1024 bytes */
int count_per_k;
/* Countable units per bufsize */
int count_per_buf;
/* The actual buffer. */
/* char *buf = 0; */
/* Let's carry on using a static buffer for this, like older versions
* of the code did. It turns out that if you use a malloc buffer,
* it goes 50% slower on reads, when using a 4k buffer -- at least on
* my OpenSUSE 10.2 system.
* What up wit dat?
*/
char buf[MAX_BUFSIZE];
int f;
int g;
int i;
void stop_count();
void clean_up();
int sigalarm = 0;
/******************** MAIN ****************************/
int main(argc, argv)
int argc;
char *argv[];
{
/* The number of seconds to run for. */
int seconds = SECONDS;
/* The type of test to run. */
char test = 'c';
int status;
int i;
for (i = 1; i < argc; ++i) {
if (argv[i][0] == '-') {
switch (argv[i][1]) {
case 'c':
case 'r':
case 'w':
test = argv[i][1];
break;
case 'b':
bufsize = atoi(argv[++i]);
break;
case 'm':
max_blocks = atoi(argv[++i]);
break;
case 't':
seconds = atoi(argv[++i]);
break;
case 'd':
if (chdir(argv[++i]) < 0) {
perror("fstime: chdir");
exit(1);
}
break;
default:
fprintf(stderr, "Usage: fstime [-c|-r|-w] [-b <bufsize>] [-m <max_blocks>] [-t <seconds>]\n");
exit(2);
}
} else {
fprintf(stderr, "Usage: fstime [-c|-r|-w] [-b <bufsize>] [-m <max_blocks>] [-t <seconds>]\n");
exit(2);
}
}
if (bufsize < COUNTSIZE || bufsize > MAX_BUFSIZE) {
fprintf(stderr, "fstime: buffer size must be in range %d-%d\n",
COUNTSIZE, 1024*1024);
exit(3);
}
if (max_blocks < 1 || max_blocks > 1024*1024) {
fprintf(stderr, "fstime: max blocks must be in range %d-%d\n",
1, 1024*1024);
exit(3);
}
if (seconds < 1 || seconds > 3600) {
fprintf(stderr, "fstime: time must be in range %d-%d seconds\n",
1, 3600);
exit(3);
}
max_buffs = max_blocks * 1024 / bufsize;
count_per_k = 1024 / COUNTSIZE;
count_per_buf = bufsize / COUNTSIZE;
/*
if ((buf = malloc(bufsize)) == 0) {
fprintf(stderr, "fstime: failed to malloc %d bytes\n", bufsize);
exit(4);
}
*/
if((f = creat(FNAME0, 0600)) == -1) {
perror("fstime: creat");
exit(1);
}
close(f);
if((g = creat(FNAME1, 0600)) == -1) {
perror("fstime: creat");
exit(1);
}
close(g);
if( (f = open(FNAME0, 2)) == -1) {
perror("fstime: open");
exit(1);
}
if( ( g = open(FNAME1, 2)) == -1 ) {
perror("fstime: open");
exit(1);
}
/* fill buffer */
for (i=0; i < bufsize; ++i)
buf[i] = i & 0xff;
signal(SIGKILL,clean_up);
/*
* Run the selected test.
* When I got here, this program ran full 30-second tests for
* write, read, and copy, outputting the results for each. BUT
* only the copy results are actually used in the benchmark index.
* With multiple iterations and three sets of FS tests, that amounted
* to about 10 minutes of wasted time per run.
*
* So, I've made the test selectable. Except that the read and write
* passes are used to create the test file and calibrate the rates used
* to tweak the results of the copy test. So, for copy tests, we do
* a few seconds of write and read to prime the pump.
*
* Note that this will also pull the file into the FS cache on any
* modern system prior to the copy test. Whether this is good or
* bad is a matter of perspective, but it's how it was when I got
* here.
*
* Ian Smith <johantheghost at yahoo period com> 21 Sep 2007
*/
switch (test) {
case 'w':
status = w_test(seconds);
break;
case 'r':
w_test(2);
status = r_test(seconds);
break;
case 'c':
w_test(2);
r_test(2);
status = c_test(seconds);
break;
default:
fprintf(stderr, "fstime: unknown test \'%c\'\n", test);
exit(6);
}
if (status) {
clean_up();
exit(1);
}
clean_up();
exit(0);
}
static double getFloatTime()
{
struct timeval t;
gettimeofday(&t, 0);
return (double) t.tv_sec + (double) t.tv_usec / 1000000.0;
}
/*
* Run the write test for the time given in seconds.
*/
int w_test(int timeSecs)
{
unsigned long counted = 0L;
unsigned long tmp;
long f_blocks;
double start, end;
extern int sigalarm;
/* Sync and let it settle */
sync();
sleep(2);
sync();
sleep(2);
/* Set an alarm. */
sigalarm = 0;
signal(SIGALRM, stop_count);
alarm(timeSecs);
start = getFloatTime();
while (!sigalarm) {
for(f_blocks=0; f_blocks < max_buffs; ++f_blocks) {
if ((tmp=write(f, buf, bufsize)) != bufsize) {
if (errno != EINTR) {
perror("fstime: write");
return(-1);
}
stop_count();
counted += ((tmp+HALFCOUNT)/COUNTSIZE);
} else
counted += count_per_buf;
}
lseek(f, 0L, 0); /* rewind */
}
/* stop clock */
end = getFloatTime();
write_score = (long) ((double) counted / ((end - start) * count_per_k));
printf("Write done: %ld in %.4f, score %ld\n",
counted, end - start, write_score);
/*
* Output the test results. Use the true time.
*/
fprintf(stderr, "COUNT|%ld|0|KBps\n", write_score);
fprintf(stderr, "TIME|%.1f\n", end - start);
return(0);
}
/*
* Run the read test for the time given in seconds.
*/
int r_test(int timeSecs)
{
unsigned long counted = 0L;
unsigned long tmp;
double start, end;
extern int sigalarm;
extern int errno;
/* Sync and let it settle */
sync();
sleep(2);
sync();
sleep(2);
/* rewind */
errno = 0;
lseek(f, 0L, 0);
/* Set an alarm. */
sigalarm = 0;
signal(SIGALRM, stop_count);
alarm(timeSecs);
start = getFloatTime();
while (!sigalarm) {
/* read while checking for an error */
if ((tmp=read(f, buf, bufsize)) != bufsize) {
switch(errno) {
case 0:
case EINVAL:
lseek(f, 0L, 0); /* rewind at end of file */
counted += (tmp+HALFCOUNT)/COUNTSIZE;
continue;
case EINTR:
stop_count();
counted += (tmp+HALFCOUNT)/COUNTSIZE;
break;
default:
perror("fstime: read");
return(-1);
break;
}
} else
counted += count_per_buf;
}
/* stop clock */
end = getFloatTime();
read_score = (long) ((double) counted / ((end - start) * count_per_k));
printf("Read done: %ld in %.4f, score %ld\n",
counted, end - start, read_score);
/*
* Output the test results. Use the true time.
*/
fprintf(stderr, "COUNT|%ld|0|KBps\n", read_score);
fprintf(stderr, "TIME|%.1f\n", end - start);
return(0);
}
/*
* Run the copy test for the time given in seconds.
*/
int c_test(int timeSecs)
{
unsigned long counted = 0L;
unsigned long tmp;
double start, end;
extern int sigalarm;
sync();
sleep(2);
sync();
sleep(1);
/* rewind */
errno = 0;
lseek(f, 0L, 0);
/* Set an alarm. */
sigalarm = 0;
signal(SIGALRM, stop_count);
alarm(timeSecs);
start = getFloatTime();
while (!sigalarm) {
if ((tmp=read(f, buf, bufsize)) != bufsize) {
switch(errno) {
case 0:
case EINVAL:
lseek(f, 0L, 0); /* rewind at end of file */
lseek(g, 0L, 0); /* rewind the output too */
continue;
case EINTR:
/* part credit for leftover bytes read */
counted += ( (tmp * write_score) /
(read_score + write_score)
+ HALFCOUNT) / COUNTSIZE;
stop_count();
break;
default:
perror("fstime: copy read");
return(-1);
break;
}
} else {
if ((tmp=write(g, buf, bufsize)) != bufsize) {
if (errno != EINTR) {
perror("fstime: copy write");
return(-1);
}
counted += (
/* Full credit for part of buffer written */
tmp +
/* Plus part credit having read full buffer */
( ((bufsize - tmp) * write_score) /
(read_score + write_score) )
+ HALFCOUNT) / COUNTSIZE;
stop_count();
} else
counted += count_per_buf;
}
}
/* stop clock */
end = getFloatTime();
copy_score = (long) ((double) counted / ((end - start) * count_per_k));
printf("Copy done: %ld in %.4f, score %ld\n",
counted, end - start, copy_score);
/*
* Output the test results. Use the true time.
*/
fprintf(stderr, "COUNT|%ld|0|KBps\n", copy_score);
fprintf(stderr, "TIME|%.1f\n", end - start);
return(0);
}
void stop_count(void)
{
extern int sigalarm;
sigalarm = 1;
}
void clean_up(void)
{
unlink(FNAME0);
unlink(FNAME1);
}
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