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/* rawspeed 1.15 - Measure speed of a device. Author: Kees J. Bot
* 26 Apr 1992
*/
#define nil 0
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <signal.h>
#include <string.h>
#include <time.h>
#if !__minix
#include <sys/time.h>
#endif
#include <fcntl.h>
#include <limits.h>
#include <sys/stat.h>
#define SECTOR_SIZE 512
#define BLK_MAX_SECTORS (sizeof(int) == 2 ? 32 : 64)
#define CHR_MAX_SECTORS (sizeof(int) == 2 ? 63 : 512)
#define ABS_MAX_SECTORS (INT_MAX / SECTOR_SIZE)
#define USEC (!__minix || __minix_vmd)
/* Any good random number generator around? */
#if __minix_vmd || __linux
#define rand random
#define srand srandom
#endif
#if __sun && __svr4__
#define rand lrand48
#define srand srand48
#endif
void report(const char *label)
{
fprintf(stderr, "rawspeed: %s: %s\n", label, strerror(errno));
}
void fatal(const char *label)
{
report(label);
exit(1);
}
void usage(void)
{
fprintf(stderr,
"Usage: rawspeed [-u unit] [-m max] [-t seconds] [-c] [-r limit] device\n");
fprintf(stderr,
" -u unit = best sector multiple (default 2)\n");
fprintf(stderr,
" -m max = read multiples of unit upto 'max' (default %d raw, %d file)\n",
CHR_MAX_SECTORS, BLK_MAX_SECTORS);
fprintf(stderr,
" -t seconds = time to run test (default 10)\n");
fprintf(stderr,
" -c = cache test: rewind after each read or write of max size\n");
fprintf(stderr,
" -r limit = random seeks upto sector 'limit' before reading or writing\n");
exit(1);
}
int done= 0;
void timeout(int sig)
{
done= 1;
}
int main(int argc, char **argv)
{
int i, fd, n= 0, unit= -1, max= -1, cache= 0;
int size, seconds= 10;
long tenthsec;
#if USEC
struct timeval start_time, end_time;
struct timezone dummy;
#else
time_t start_time;
#endif
off_t nbytes= 0, wbytes= 0, randlimit= 0;
char *device, *chunk;
struct stat st;
off_t nseeks= 0;
for (i= 1; i < argc && argv[i][0] == '-' && argv[i][1] != 0; i++) {
char *opt;
if (argv[i][1] == '-' && argv[i][2] == 0) { i++; break; }
for (opt= argv[i]+1; *opt != 0; opt++) {
switch (*opt) {
case 'w':
if (i == argc) usage();
wbytes= atol(argv[++i]) * 1024;
if (wbytes <= 0) usage();
break;
case 'm':
if (i == argc) usage();
max= atoi(argv[++i]);
if (max <= 0 || max > ABS_MAX_SECTORS)
usage();
break;
case 'u':
if (i == argc) usage();
unit= atoi(argv[++i]);
if (unit <= 0 || unit > ABS_MAX_SECTORS)
usage();
break;
case 't':
if (i == argc) usage();
seconds= atoi(argv[++i]);
if (seconds <= 0) usage();
break;
case 'c':
cache= 1;
break;
case 'r':
if (i == argc) usage();
randlimit= atol(argv[++i]);
if (randlimit <= 0) usage();
break;
default:
usage();
}
}
}
if (i != argc - 1) usage();
if (strcmp(argv[i], "-") == 0) {
fd= wbytes == 0 ? 0 : 1;
device= "";
} else {
device= argv[i];
if ((fd= open(device,
wbytes == 0 ? O_RDONLY : O_WRONLY | O_CREAT, 0666)) < 0)
fatal(device);
}
if (max < 0) {
if (fstat(fd, &st) >= 0 && S_ISCHR(st.st_mode))
max= CHR_MAX_SECTORS;
else
max= BLK_MAX_SECTORS;
}
if (unit < 0) unit= max > 1 ? 2 : 1;
unit*= max / unit;
if (unit == 0) usage();
size= unit * SECTOR_SIZE;
randlimit/= unit;
if ((chunk= malloc((size_t) size)) == nil) {
fprintf(stderr, "rawspeed: can't grab %d bytes: %s\n",
size, strerror(errno));
exit(1);
}
/* Touch the pages to get real memory sending other processes to swap.
*/
memset((void *) chunk, 0, (size_t) size);
/* Clean the cache. */
sync();
signal(SIGALRM, timeout);
signal(SIGINT, timeout);
#if USEC
gettimeofday(&start_time, &dummy);
if (randlimit != 0) srand((int) (start_time.tv_sec & INT_MAX));
#else
start_time= time((time_t *) nil);
if (randlimit != 0) srand((int) (start_time & INT_MAX));
#endif
alarm(seconds);
if (wbytes > 0) {
while (!done && (n= write(fd, chunk, size)) > 0
&& (nbytes+= n) < wbytes) {
if (cache && lseek(fd, (off_t) 0, SEEK_SET) == -1)
fatal(device);
if (randlimit != 0) {
if (lseek(fd, (off_t)
(rand() % randlimit * size),
SEEK_SET) == -1)
fatal(device);
nseeks++;
}
}
sync();
} else {
while (!done && (n= read(fd, chunk, size)) > 0) {
nbytes+= n;
if (cache && lseek(fd, (off_t) 0, SEEK_SET) == -1)
fatal(device);
if (randlimit != 0) {
if (lseek(fd, (off_t)
(rand() % randlimit * size),
SEEK_SET) == -1)
fatal(device);
nseeks++;
}
}
}
#if USEC
gettimeofday(&end_time, &dummy);
tenthsec= (end_time.tv_sec - start_time.tv_sec) * 10
+ (end_time.tv_usec - start_time.tv_usec) / 100000;
#else
tenthsec= (time((time_t *) 0) - start_time) * 10;
#endif
if (n < 0 && errno == EINTR) n= 0;
if (n < 0) report(device);
if (nbytes > 0) {
off_t kBpts;
fprintf(stderr, "%lld kB / %ld.%ld s = ",
(nbytes + 512) / 1024,
tenthsec / 10, tenthsec % 10);
if (tenthsec < 5)
fprintf(stderr, "infinite\n");
else {
if (nbytes > LONG_MAX / 100) {
seconds = (tenthsec + 5) / 10;
kBpts= (nbytes + 512L * seconds)
/ (1024L * seconds);
fprintf(stderr, "%lld kB/s\n", kBpts);
} else {
kBpts= (100 * nbytes + 512L * tenthsec)
/ (1024L * tenthsec);
fprintf(stderr, "%lld.%d kB/s\n",
kBpts/10, (int)(kBpts%10));
}
}
}
if (randlimit != 0 && tenthsec >= 5) {
int rpm, disc= 0;
off_t tenthms;
tenthms= (tenthsec * 1000 + nseeks/2) / nseeks;
fprintf(stderr,
"%lld seeks / %ld.%ld s = %lld seeks/s = %lld.%d ms/seek\n",
nseeks, tenthsec / 10, tenthsec % 10,
(nseeks * 10 + tenthsec/2) / tenthsec,
tenthms / 10, (int)(tenthms % 10));
for (rpm= 3600; rpm <= 7200; rpm+= 1800) {
int rotms = (10000L / 2 * 60 + rpm/2) / rpm;
if (tenthms <= rotms) continue;
if (!disc) {
fprintf(stderr,
"discarding av. rotational delay:\n ");
disc= 1;
} else {
fprintf(stderr, ", ");
}
fprintf(stderr, "%lld.%d ms (%d rpm)",
(tenthms - rotms) / 10,
(int)((tenthms - rotms) % 10),
rpm);
}
if (disc) fputc('\n', stdout);
}
return n < 0 ? 1 : 0;
}
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