directory=x Use 'x' as the top level directory for storing files
rw=x 'x' may be: read, randread, write, randwrite,
rw (read-write mix), randrw (read-write random mix)
+ rwmixcycle=x Base cycle for switching between read and write
+ in msecs.
+ rwmixread=x 'x' percentage of rw mix ios will be reads. If
+ rwmixwrite is also given, the last of the two will
+ be used if they don't add up to 100%.
+ rwmixwrite=x 'x' percentage of rw mix ios will be writes. See
+ rwmixread.
size=x Set file size to x bytes (x string can include k/m/g)
ioengine=x 'x' may be: aio/libaio/linuxaio for Linux aio,
posixaio for POSIX aio, sync for regular read/write io,
rw, offset, length
where with rw=0/1 for read/write, and the offset
and length entries being in bytes.
+ write_iolog=x Write an iolog to file 'x' in the same format as iolog.
+ The iolog options are exclusive, if both given the
+ read iolog will be performed.
lockmem=x Lock down x amount of memory on the machine, to
simulate a machine with less memory available. x can
include k/m/g suffix.
+ nice=x Run job at given nice value.
Examples using a job file
-------------------------
#define DEF_FILE_SIZE (1024 * 1024 * 1024UL)
#define DEF_ZONE_SIZE (0)
#define DEF_ZONE_SKIP (0)
+#define DEF_RWMIX_CYCLE (500)
+#define DEF_RWMIX_READ (50)
+#define DEF_NICE (0)
static char fio_version_string[] = "fio 1.3";
int init_random_state(struct thread_data *td)
{
- unsigned long seed;
+ unsigned long seeds[4];
int fd, num_maps, blocks;
fd = open("/dev/urandom", O_RDONLY);
return 1;
}
- if (read(fd, &seed, sizeof(seed)) < (int) sizeof(seed)) {
+ if (read(fd, seeds, sizeof(seeds)) < (int) sizeof(seeds)) {
td_verror(td, EIO);
close(fd);
return 1;
close(fd);
- srand48_r(seed, &td->bsrange_state);
- srand48_r(seed, &td->verify_state);
+ srand48_r(seeds[0], &td->bsrange_state);
+ srand48_r(seeds[1], &td->verify_state);
+ srand48_r(seeds[2], &td->rwmix_state);
if (td->sequential)
return 0;
if (repeatable)
- seed = DEF_RANDSEED;
+ seeds[3] = DEF_RANDSEED;
blocks = (td->io_size + td->min_bs - 1) / td->min_bs;
num_maps = blocks / BLOCKS_PER_MAP;
td->num_maps = num_maps;
memset(td->file_map, 0, num_maps * sizeof(long));
- srand48_r(seed, &td->random_state);
+ srand48_r(seeds[3], &td->random_state);
return 0;
}
static int check_str(char *p, char *name, str_cb_fn *cb, struct thread_data *td)
{
- char *s = strstr(p, name);
+ char *s;
+ if (strncmp(p, name, strlen(name)))
+ return 1;
+
+ s = strstr(p, name);
if (!s)
return 1;
static int check_strstore(char *p, char *name, char *dest)
{
- char *s = strstr(p, name);
+ char *s;
+ if (strncmp(p, name, strlen(name)))
+ return 1;
+
+ s = strstr(p, name);
if (!s)
return 1;
char option[128];
char *str, *p1, *p2;
+ if (strncmp(p, name, strlen(name)))
+ return 1;
+
strcpy(option, p);
p = option;
static int str_iolog_cb(struct thread_data *td, char *file)
{
strncpy(td->iolog_file, file, sizeof(td->iolog_file) - 1);
-
return 0;
}
int parse_jobs_ini(char *file)
{
- unsigned int prioclass, prio, cpu, global;
+ unsigned int prioclass, prio, cpu, global, il;
unsigned long long ull;
unsigned long ul1, ul2;
struct thread_data *td;
fgetpos(f, &off);
continue;
}
+ if (!check_int(p, "rwmixcycle", &td->rwmixcycle)) {
+ fgetpos(f, &off);
+ continue;
+ }
+ if (!check_int(p, "rwmixread", &il)) {
+ if (il > 100)
+ il = 100;
+ td->rwmixread = il;
+ fgetpos(f, &off);
+ continue;
+ }
+ if (!check_int(p, "rwmixwrite", &il)) {
+ if (il > 100)
+ il = 100;
+ td->rwmixread = 100 - il;
+ fgetpos(f, &off);
+ continue;
+ }
+ if (!check_int(p, "nice", &td->nice)) {
+ fgetpos(f, &off);
+ continue;
+ }
if (!check_range(p, "bsrange", &ul1, &ul2)) {
if (ul1 > ul2) {
td->max_bs = ul1;
continue;
}
if (!check_str(p, "iolog", str_iolog_cb, td)) {
- td->iolog = 1;
+ printf("got read iolog\n");
+ td->read_iolog = 1;
+ td->write_iolog = 0;
+ fgetpos(f, &off);
+ continue;
+ }
+ if (!td->read_iolog &&
+ !check_str(p, "write_iolog", str_iolog_cb, td)) {
+ printf("got write iolog\n");
+ td->write_iolog = 1;
fgetpos(f, &off);
continue;
}
def_thread.stonewall = DEF_STONEWALL;
def_thread.numjobs = DEF_NUMJOBS;
def_thread.use_thread = DEF_USE_THREAD;
+ def_thread.rwmixcycle = DEF_RWMIX_CYCLE;
+ def_thread.rwmixread = DEF_RWMIX_READ;
+ def_thread.nice = DEF_NICE;
#ifdef FIO_HAVE_DISK_UTIL
def_thread.do_disk_util = 1;
#endif
memcpy(hdr->md5_digest, md5_ctx.hash, sizeof(md5_ctx.hash));
}
-unsigned int hweight32(unsigned int w)
-{
- unsigned int res = w - ((w >> 1) & 0x55555555);
-
- res = (res & 0x33333333) + ((res >> 2) & 0x33333333);
- res = (res + (res >> 4)) & 0x0F0F0F0F;
- res = res + (res >> 8);
-
- return (res + (res >> 16)) & 0x000000FF;
-}
-
-unsigned long hweight64(unsigned long long w)
+static int get_rw_ddir(struct thread_data *td)
{
-#if __WORDSIZE == 32
- return hweight32((unsigned int)(w >> 32)) + hweight32((unsigned int)w);
-#elif __WORDSIZE == 64
- unsigned long long v = w - ((w >> 1) & 0x5555555555555555ul);
+ if (td_rw(td)) {
+ struct timeval now;
+ unsigned long elapsed;
- v = (v & 0x3333333333333333ul) + ((v >> 2) & 0x3333333333333333ul);
- v = (v + (v >> 4)) & 0x0F0F0F0F0F0F0F0Ful;
- v = v + (v >> 8);
- v = v + (v >> 16);
+ gettimeofday(&now, NULL);
+ elapsed = mtime_since_now(&td->rwmix_switch);
- return (v + (v >> 32)) & 0x00000000000000FFul;
-#else
-#error __WORDSIZE not defined
-#endif
-}
+ /*
+ * Check if it's time to seed a new data direction.
+ */
+ if (elapsed >= td->rwmixcycle) {
+ unsigned long v;
+ long r;
-static int get_rw_ddir(struct thread_data *td)
-{
- /*
- * perhaps cheasy, but use the hamming weight of the position
- * as a randomizer for data direction.
- */
- if (td_rw(td))
- return hweight64(td->last_pos) & 1;
- else if (td_read(td))
+ lrand48_r(&td->random_state, &r);
+ v = 100UL * r / (unsigned long) (RAND_MAX + 1.0);
+ if (v < td->rwmixread)
+ td->rwmix_ddir = DDIR_READ;
+ else
+ td->rwmix_ddir = DDIR_WRITE;
+ memcpy(&td->rwmix_switch, &now, sizeof(now));
+ }
+ return td->rwmix_ddir;
+ } else if (td_read(td))
return DDIR_READ;
else
return DDIR_WRITE;
td->cur_depth--;
}
- static int fill_io_u(struct thread_data *td, struct io_u *io_u)
+ static void write_iolog_put(struct thread_data *td, struct io_u *io_u)
{
- /*
- * If using an iolog, grab next piece if any available.
- */
- if (td->iolog) {
- struct io_piece *ipo;
+ fprintf(td->iolog_f, "%d,%llu,%u\n", io_u->ddir, io_u->offset, io_u->buflen);
+ }
- if (list_empty(&td->io_log_list))
- return 1;
+ static int read_iolog_get(struct thread_data *td, struct io_u *io_u)
+ {
+ struct io_piece *ipo;
+ if (!list_empty(&td->io_log_list)) {
ipo = list_entry(td->io_log_list.next, struct io_piece, list);
list_del(&ipo->list);
io_u->offset = ipo->offset;
return 0;
}
+ return 1;
+ }
+
+ static int fill_io_u(struct thread_data *td, struct io_u *io_u)
+ {
+ /*
+ * If using an iolog, grab next piece if any available.
+ */
+ if (td->read_iolog)
+ return read_iolog_get(td, io_u);
+
/*
* No log, let the seq/rand engine retrieve the next position.
*/
if (io_u->buflen) {
io_u->ddir = get_rw_ddir(td);
+
+ /*
+ * If using a write iolog, store this entry.
+ */
+ if (td->write_iolog)
+ write_iolog_put(td, io_u);
+
return 0;
}
}
return NULL;
}
- if (!td->iolog && !td->sequential)
+ if (!td->read_iolog && !td->sequential)
mark_random_map(td, io_u);
td->last_pos += io_u->buflen;
list_add(&ipo->list, entry);
}
+ static void write_iolog_close(struct thread_data *td)
+ {
+ fflush(td->iolog_f);
+ fclose(td->iolog_f);
+ free(td->iolog_buf);
+ }
+
static int init_iolog(struct thread_data *td)
{
unsigned long long offset;
FILE *f;
int rw, i, reads, writes;
- if (!td->iolog)
+ if (!td->read_iolog && !td->write_iolog)
return 0;
- f = fopen(td->iolog_file, "r");
+ if (td->read_iolog)
+ f = fopen(td->iolog_file, "r");
+ else
+ f = fopen(td->iolog_file, "w");
+
if (!f) {
perror("fopen iolog");
+ printf("file %s, %d/%d\n", td->iolog_file, td->read_iolog, td->write_iolog);
return 1;
}
+ /*
+ * That's it for writing, setup a log buffer and we're done.
+ */
+ if (td->write_iolog) {
+ td->iolog_f = f;
+ td->iolog_buf = malloc(8192);
+ setvbuf(f, td->iolog_buf, _IOFBF, 8192);
+ return 0;
+ }
+
+ /*
+ * Read in the read iolog and store it, reuse the infrastructure
+ * for doing verifications.
+ */
str = malloc(4096);
reads = writes = i = 0;
while ((p = fgets(str, 4096, f)) != NULL) {
static void *thread_main(void *data)
{
struct thread_data *td = data;
- int ret = 1;
if (!td->use_thread)
setsid();
}
}
+ if (nice(td->nice) < 0) {
+ td_verror(td, errno);
+ goto err;
+ }
+
if (init_random_state(td))
goto err;
td_set_runstate(td, TD_INITIALIZED);
sem_post(&startup_sem);
sem_wait(&td->mutex);
+ ret = 0;
if (!td->create_serialize && setup_file(td))
goto err;
finish_log(td, td->slat_log, "slat");
if (td->clat_log)
finish_log(td, td->clat_log, "clat");
+ if (td->write_iolog)
+ write_iolog_close(td);
if (exitall_on_terminate)
terminate_threads(td->groupid);
munmap(td->mmap, td->file_size);
cleanup_io(td);
cleanup_io_u(td);
- if (ret) {
- sem_post(&startup_sem);
- sem_wait(&td->mutex);
- }
td_set_runstate(td, TD_EXITED);
return NULL;
td = map[i];
if (!td)
continue;
- if (td->runstate == TD_INITIALIZED ||
- td->runstate >= TD_EXITED) {
+ if (td->runstate == TD_INITIALIZED) {
map[i] = NULL;
left--;
- continue;
+ } else if (td->runstate >= TD_EXITED) {
+ map[i] = NULL;
+ left--;
+ todo--;
+ nr_running++; /* work-around... */
}
}
}
}
/*
- * start created threads (TD_INITIALIZED -> TD_RUNNING)
+ * start created threads (TD_INITIALIZED -> TD_RUNNING).
*/
printf("fio: Go for launch\n");
for (i = 0; i < thread_number; i++) {
unsigned int iodepth;
os_cpu_mask_t cpumask;
unsigned int jobnum;
+ unsigned int iolog;
+ unsigned int read_iolog;
+ unsigned int write_iolog;
+ unsigned int rwmixcycle;
+ unsigned int rwmixread;
+ unsigned int nice;
char iolog_file[256];
+ void *iolog_buf;
+ FILE *iolog_f;
struct drand48_data bsrange_state;
struct drand48_data verify_state;
unsigned int do_disk_util;
unsigned int override_sync;
+ struct drand48_data rwmix_state;
+ struct timeval rwmix_switch;
+ int rwmix_ddir;
+
struct list_head io_hist_list;
struct list_head io_log_list;
};