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Align test I/O buffer to page boundary.

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This is more alike to typical kernel behavior, that can be useful from
benchmarking point of view.

MFC after:	1 week
This commit is contained in:
Alexander Motin 2017-10-01 16:59:02 +00:00
parent 3e52a05570
commit e975a1aba0
1 changed files with 12 additions and 9 deletions
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21
usr.sbin/diskinfo/diskinfo.c
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@ -50,6 +50,8 @@
#include <sys/time.h>
#define NAIO 128
#define MAXTX (8*1024*1024)
#define MEGATX (1024*1024)
static void
usage(void)
@ -67,12 +69,14 @@ static void slogbench(int fd, int isreg, off_t mediasize, u_int sectorsize);
static int zonecheck(int fd, uint32_t *zone_mode, char *zone_str,
size_t zone_str_len);
static uint8_t *buf;
int
main(int argc, char **argv)
{
struct stat sb;
int i, ch, fd, error, exitval = 0;
char buf[BUFSIZ], ident[DISK_IDENT_SIZE], physpath[MAXPATHLEN];
char tstr[BUFSIZ], ident[DISK_IDENT_SIZE], physpath[MAXPATHLEN];
char zone_desc[64];
struct diocgattr_arg arg;
off_t mediasize, stripesize, stripeoffset;
@ -129,11 +133,13 @@ main(int argc, char **argv)
usage();
}
if (posix_memalign((void **)&buf, PAGE_SIZE, MAXTX))
errx(1, "Can't allocate memory buffer");
for (i = 0; i < argc; i++) {
fd = open(argv[i], (opt_w ? O_RDWR : O_RDONLY) | O_DIRECT);
if (fd < 0 && errno == ENOENT && *argv[i] != '/') {
snprintf(buf, BUFSIZ, "%s%s", _PATH_DEV, argv[i]);
fd = open(buf, O_RDONLY);
snprintf(tstr, sizeof(tstr), "%s%s", _PATH_DEV, argv[i]);
fd = open(tstr, O_RDONLY);
}
if (fd < 0) {
warn("%s", argv[i]);
@ -216,12 +222,12 @@ main(int argc, char **argv)
printf("\t%u", fwsectors);
}
} else {
humanize_number(buf, 5, (int64_t)mediasize, "",
humanize_number(tstr, 5, (int64_t)mediasize, "",
HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
printf("%s\n", argv[i]);
printf("\t%-12u\t# sectorsize\n", sectorsize);
printf("\t%-12jd\t# mediasize in bytes (%s)\n",
(intmax_t)mediasize, buf);
(intmax_t)mediasize, tstr);
printf("\t%-12jd\t# mediasize in sectors\n",
(intmax_t)mediasize/sectorsize);
printf("\t%-12jd\t# stripesize\n", stripesize);
@ -255,13 +261,10 @@ main(int argc, char **argv)
out:
close(fd);
}
free(buf);
exit (exitval);
}
#define MAXTX (8*1024*1024)
#define MEGATX (1024*1024)
static uint8_t buf[MAXTX];
static void
rdsect(int fd, off_t blockno, u_int sectorsize)
{