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init.c
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init.c
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/*
* This file contains job initialization and setup functions.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <ctype.h>
#include <string.h>
#include <errno.h>
#include <sys/ipc.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "fio.h"
#ifndef FIO_NO_HAVE_SHM_H
#include <sys/shm.h>
#endif
#include "parse.h"
#include "smalloc.h"
#include "filehash.h"
#include "verify.h"
#include "profile.h"
#include "server.h"
#include "idletime.h"
#include "filelock.h"
#include "lib/getopt.h"
#include "lib/strcasestr.h"
#include "crc/test.h"
const char fio_version_string[] = FIO_VERSION;
#define FIO_RANDSEED (0xb1899bedUL)
static char **ini_file;
static int max_jobs = FIO_MAX_JOBS;
static int dump_cmdline;
static long long def_timeout;
static int parse_only;
static struct thread_data def_thread;
struct thread_data *threads = NULL;
static char **job_sections;
static int nr_job_sections;
int exitall_on_terminate = 0;
int output_format = FIO_OUTPUT_NORMAL;
int append_terse_output = 0;
int eta_print = FIO_ETA_AUTO;
int eta_new_line = 0;
FILE *f_out = NULL;
FILE *f_err = NULL;
char *exec_profile = NULL;
int warnings_fatal = 0;
int terse_version = 3;
int is_backend = 0;
int nr_clients = 0;
int log_syslog = 0;
int write_bw_log = 0;
int read_only = 0;
int status_interval = 0;
char *trigger_file = NULL;
long long trigger_timeout = 0;
char *trigger_cmd = NULL;
char *trigger_remote_cmd = NULL;
char *aux_path = NULL;
static int prev_group_jobs;
unsigned long fio_debug = 0;
unsigned int fio_debug_jobno = -1;
unsigned int *fio_debug_jobp = NULL;
static char cmd_optstr[256];
static int did_arg;
#define FIO_CLIENT_FLAG (1 << 16)
/*
* Command line options. These will contain the above, plus a few
* extra that only pertain to fio itself and not jobs.
*/
static struct option l_opts[FIO_NR_OPTIONS] = {
{
.name = (char *) "output",
.has_arg = required_argument,
.val = 'o' | FIO_CLIENT_FLAG,
},
{
.name = (char *) "timeout",
.has_arg = required_argument,
.val = 't' | FIO_CLIENT_FLAG,
},
{
.name = (char *) "latency-log",
.has_arg = required_argument,
.val = 'l' | FIO_CLIENT_FLAG,
},
{
.name = (char *) "bandwidth-log",
.has_arg = required_argument,
.val = 'b' | FIO_CLIENT_FLAG,
},
{
.name = (char *) "minimal",
.has_arg = no_argument,
.val = 'm' | FIO_CLIENT_FLAG,
},
{
.name = (char *) "output-format",
.has_arg = optional_argument,
.val = 'F' | FIO_CLIENT_FLAG,
},
{
.name = (char *) "append-terse",
.has_arg = optional_argument,
.val = 'f',
},
{
.name = (char *) "version",
.has_arg = no_argument,
.val = 'v' | FIO_CLIENT_FLAG,
},
{
.name = (char *) "help",
.has_arg = no_argument,
.val = 'h' | FIO_CLIENT_FLAG,
},
{
.name = (char *) "cmdhelp",
.has_arg = optional_argument,
.val = 'c' | FIO_CLIENT_FLAG,
},
{
.name = (char *) "enghelp",
.has_arg = optional_argument,
.val = 'i' | FIO_CLIENT_FLAG,
},
{
.name = (char *) "showcmd",
.has_arg = no_argument,
.val = 's' | FIO_CLIENT_FLAG,
},
{
.name = (char *) "readonly",
.has_arg = no_argument,
.val = 'r' | FIO_CLIENT_FLAG,
},
{
.name = (char *) "eta",
.has_arg = required_argument,
.val = 'e' | FIO_CLIENT_FLAG,
},
{
.name = (char *) "eta-newline",
.has_arg = required_argument,
.val = 'E' | FIO_CLIENT_FLAG,
},
{
.name = (char *) "debug",
.has_arg = required_argument,
.val = 'd' | FIO_CLIENT_FLAG,
},
{
.name = (char *) "parse-only",
.has_arg = no_argument,
.val = 'P' | FIO_CLIENT_FLAG,
},
{
.name = (char *) "section",
.has_arg = required_argument,
.val = 'x' | FIO_CLIENT_FLAG,
},
#ifdef CONFIG_ZLIB
{
.name = (char *) "inflate-log",
.has_arg = required_argument,
.val = 'X' | FIO_CLIENT_FLAG,
},
#endif
{
.name = (char *) "alloc-size",
.has_arg = required_argument,
.val = 'a' | FIO_CLIENT_FLAG,
},
{
.name = (char *) "profile",
.has_arg = required_argument,
.val = 'p' | FIO_CLIENT_FLAG,
},
{
.name = (char *) "warnings-fatal",
.has_arg = no_argument,
.val = 'w' | FIO_CLIENT_FLAG,
},
{
.name = (char *) "max-jobs",
.has_arg = required_argument,
.val = 'j' | FIO_CLIENT_FLAG,
},
{
.name = (char *) "terse-version",
.has_arg = required_argument,
.val = 'V' | FIO_CLIENT_FLAG,
},
{
.name = (char *) "server",
.has_arg = optional_argument,
.val = 'S',
},
{ .name = (char *) "daemonize",
.has_arg = required_argument,
.val = 'D',
},
{
.name = (char *) "client",
.has_arg = required_argument,
.val = 'C',
},
{
.name = (char *) "remote-config",
.has_arg = required_argument,
.val = 'R',
},
{
.name = (char *) "cpuclock-test",
.has_arg = no_argument,
.val = 'T',
},
{
.name = (char *) "crctest",
.has_arg = optional_argument,
.val = 'G',
},
{
.name = (char *) "idle-prof",
.has_arg = required_argument,
.val = 'I',
},
{
.name = (char *) "status-interval",
.has_arg = required_argument,
.val = 'L',
},
{
.name = (char *) "trigger-file",
.has_arg = required_argument,
.val = 'W',
},
{
.name = (char *) "trigger-timeout",
.has_arg = required_argument,
.val = 'B',
},
{
.name = (char *) "trigger",
.has_arg = required_argument,
.val = 'H',
},
{
.name = (char *) "trigger-remote",
.has_arg = required_argument,
.val = 'J',
},
{
.name = (char *) "aux-path",
.has_arg = required_argument,
.val = 'K',
},
{
.name = NULL,
},
};
void free_threads_shm(void)
{
if (threads) {
void *tp = threads;
#ifndef CONFIG_NO_SHM
struct shmid_ds sbuf;
threads = NULL;
shmdt(tp);
shmctl(shm_id, IPC_RMID, &sbuf);
shm_id = -1;
#else
threads = NULL;
free(tp);
#endif
}
}
static void free_shm(void)
{
if (threads) {
file_hash_exit();
flow_exit();
fio_debug_jobp = NULL;
free_threads_shm();
}
free(trigger_file);
free(trigger_cmd);
free(trigger_remote_cmd);
trigger_file = trigger_cmd = trigger_remote_cmd = NULL;
options_free(fio_options, &def_thread);
fio_filelock_exit();
scleanup();
}
/*
* The thread area is shared between the main process and the job
* threads/processes. So setup a shared memory segment that will hold
* all the job info. We use the end of the region for keeping track of
* open files across jobs, for file sharing.
*/
static int setup_thread_area(void)
{
void *hash;
if (threads)
return 0;
/*
* 1024 is too much on some machines, scale max_jobs if
* we get a failure that looks like too large a shm segment
*/
do {
size_t size = max_jobs * sizeof(struct thread_data);
size += file_hash_size;
size += sizeof(unsigned int);
#ifndef CONFIG_NO_SHM
shm_id = shmget(0, size, IPC_CREAT | 0600);
if (shm_id != -1)
break;
if (errno != EINVAL && errno != ENOMEM && errno != ENOSPC) {
perror("shmget");
break;
}
#else
threads = malloc(size);
if (threads)
break;
#endif
max_jobs >>= 1;
} while (max_jobs);
#ifndef CONFIG_NO_SHM
if (shm_id == -1)
return 1;
threads = shmat(shm_id, NULL, 0);
if (threads == (void *) -1) {
perror("shmat");
return 1;
}
#endif
memset(threads, 0, max_jobs * sizeof(struct thread_data));
hash = (void *) threads + max_jobs * sizeof(struct thread_data);
fio_debug_jobp = (void *) hash + file_hash_size;
*fio_debug_jobp = -1;
file_hash_init(hash);
flow_init();
return 0;
}
static void set_cmd_options(struct thread_data *td)
{
struct thread_options *o = &td->o;
if (!o->timeout)
o->timeout = def_timeout;
}
/*
* Return a free job structure.
*/
static struct thread_data *get_new_job(int global, struct thread_data *parent,
int preserve_eo, const char *jobname)
{
struct thread_data *td;
if (global) {
set_cmd_options(&def_thread);
return &def_thread;
}
if (setup_thread_area()) {
log_err("error: failed to setup shm segment\n");
return NULL;
}
if (thread_number >= max_jobs) {
log_err("error: maximum number of jobs (%d) reached.\n",
max_jobs);
return NULL;
}
td = &threads[thread_number++];
*td = *parent;
td->io_ops = NULL;
if (!preserve_eo)
td->eo = NULL;
td->o.uid = td->o.gid = -1U;
dup_files(td, parent);
fio_options_mem_dupe(td);
profile_add_hooks(td);
td->thread_number = thread_number;
td->subjob_number = 0;
if (jobname)
td->o.name = strdup(jobname);
if (!parent->o.group_reporting)
stat_number++;
set_cmd_options(td);
return td;
}
static void put_job(struct thread_data *td)
{
if (td == &def_thread)
return;
profile_td_exit(td);
flow_exit_job(td);
if (td->error)
log_info("fio: %s\n", td->verror);
fio_options_free(td);
if (td->io_ops)
free_ioengine(td);
if (td->o.name)
free(td->o.name);
memset(&threads[td->thread_number - 1], 0, sizeof(*td));
thread_number--;
}
static int __setup_rate(struct thread_data *td, enum fio_ddir ddir)
{
unsigned int bs = td->o.min_bs[ddir];
assert(ddir_rw(ddir));
if (td->o.rate[ddir])
td->rate_bps[ddir] = td->o.rate[ddir];
else
td->rate_bps[ddir] = td->o.rate_iops[ddir] * bs;
if (!td->rate_bps[ddir]) {
log_err("rate lower than supported\n");
return -1;
}
td->rate_next_io_time[ddir] = 0;
td->rate_io_issue_bytes[ddir] = 0;
return 0;
}
static int setup_rate(struct thread_data *td)
{
int ret = 0;
if (td->o.rate[DDIR_READ] || td->o.rate_iops[DDIR_READ])
ret = __setup_rate(td, DDIR_READ);
if (td->o.rate[DDIR_WRITE] || td->o.rate_iops[DDIR_WRITE])
ret |= __setup_rate(td, DDIR_WRITE);
if (td->o.rate[DDIR_TRIM] || td->o.rate_iops[DDIR_TRIM])
ret |= __setup_rate(td, DDIR_TRIM);
return ret;
}
static int fixed_block_size(struct thread_options *o)
{
return o->min_bs[DDIR_READ] == o->max_bs[DDIR_READ] &&
o->min_bs[DDIR_WRITE] == o->max_bs[DDIR_WRITE] &&
o->min_bs[DDIR_TRIM] == o->max_bs[DDIR_TRIM] &&
o->min_bs[DDIR_READ] == o->min_bs[DDIR_WRITE] &&
o->min_bs[DDIR_READ] == o->min_bs[DDIR_TRIM];
}
static unsigned long long get_rand_start_delay(struct thread_data *td)
{
unsigned long long delayrange;
uint64_t frand_max;
unsigned long r;
delayrange = td->o.start_delay_high - td->o.start_delay;
frand_max = rand_max(&td->delay_state);
r = __rand(&td->delay_state);
delayrange = (unsigned long long) ((double) delayrange * (r / (frand_max + 1.0)));
delayrange += td->o.start_delay;
return delayrange;
}
/*
* Lazy way of fixing up options that depend on each other. We could also
* define option callback handlers, but this is easier.
*/
static int fixup_options(struct thread_data *td)
{
struct thread_options *o = &td->o;
int ret = 0;
#ifndef FIO_HAVE_PSHARED_MUTEX
if (!o->use_thread) {
log_info("fio: this platform does not support process shared"
" mutexes, forcing use of threads. Use the 'thread'"
" option to get rid of this warning.\n");
o->use_thread = 1;
ret = warnings_fatal;
}
#endif
if (o->write_iolog_file && o->read_iolog_file) {
log_err("fio: read iolog overrides write_iolog\n");
free(o->write_iolog_file);
o->write_iolog_file = NULL;
ret = warnings_fatal;
}
/*
* only really works with 1 file
*/
if (o->zone_size && o->open_files > 1)
o->zone_size = 0;
/*
* If zone_range isn't specified, backward compatibility dictates it
* should be made equal to zone_size.
*/
if (o->zone_size && !o->zone_range)
o->zone_range = o->zone_size;
/*
* Reads can do overwrites, we always need to pre-create the file
*/
if (td_read(td) || td_rw(td))
o->overwrite = 1;
if (!o->min_bs[DDIR_READ])
o->min_bs[DDIR_READ] = o->bs[DDIR_READ];
if (!o->max_bs[DDIR_READ])
o->max_bs[DDIR_READ] = o->bs[DDIR_READ];
if (!o->min_bs[DDIR_WRITE])
o->min_bs[DDIR_WRITE] = o->bs[DDIR_WRITE];
if (!o->max_bs[DDIR_WRITE])
o->max_bs[DDIR_WRITE] = o->bs[DDIR_WRITE];
if (!o->min_bs[DDIR_TRIM])
o->min_bs[DDIR_TRIM] = o->bs[DDIR_TRIM];
if (!o->max_bs[DDIR_TRIM])
o->max_bs[DDIR_TRIM] = o->bs[DDIR_TRIM];
o->rw_min_bs = min(o->min_bs[DDIR_READ], o->min_bs[DDIR_WRITE]);
o->rw_min_bs = min(o->min_bs[DDIR_TRIM], o->rw_min_bs);
/*
* For random IO, allow blockalign offset other than min_bs.
*/
if (!o->ba[DDIR_READ] || !td_random(td))
o->ba[DDIR_READ] = o->min_bs[DDIR_READ];
if (!o->ba[DDIR_WRITE] || !td_random(td))
o->ba[DDIR_WRITE] = o->min_bs[DDIR_WRITE];
if (!o->ba[DDIR_TRIM] || !td_random(td))
o->ba[DDIR_TRIM] = o->min_bs[DDIR_TRIM];
if ((o->ba[DDIR_READ] != o->min_bs[DDIR_READ] ||
o->ba[DDIR_WRITE] != o->min_bs[DDIR_WRITE] ||
o->ba[DDIR_TRIM] != o->min_bs[DDIR_TRIM]) &&
!o->norandommap) {
log_err("fio: Any use of blockalign= turns off randommap\n");
o->norandommap = 1;
ret = warnings_fatal;
}
if (!o->file_size_high)
o->file_size_high = o->file_size_low;
if (o->start_delay_high)
o->start_delay = get_rand_start_delay(td);
if (o->norandommap && o->verify != VERIFY_NONE
&& !fixed_block_size(o)) {
log_err("fio: norandommap given for variable block sizes, "
"verify limited\n");
ret = warnings_fatal;
}
if (o->bs_unaligned && (o->odirect || td->io_ops->flags & FIO_RAWIO))
log_err("fio: bs_unaligned may not work with raw io\n");
/*
* thinktime_spin must be less than thinktime
*/
if (o->thinktime_spin > o->thinktime)
o->thinktime_spin = o->thinktime;
/*
* The low water mark cannot be bigger than the iodepth
*/
if (o->iodepth_low > o->iodepth || !o->iodepth_low)
o->iodepth_low = o->iodepth;
/*
* If batch number isn't set, default to the same as iodepth
*/
if (o->iodepth_batch > o->iodepth || !o->iodepth_batch)
o->iodepth_batch = o->iodepth;
if (o->nr_files > td->files_index)
o->nr_files = td->files_index;
if (o->open_files > o->nr_files || !o->open_files)
o->open_files = o->nr_files;
if (((o->rate[DDIR_READ] + o->rate[DDIR_WRITE] + o->rate[DDIR_TRIM]) &&
(o->rate_iops[DDIR_READ] + o->rate_iops[DDIR_WRITE] + o->rate_iops[DDIR_TRIM])) ||
((o->ratemin[DDIR_READ] + o->ratemin[DDIR_WRITE] + o->ratemin[DDIR_TRIM]) &&
(o->rate_iops_min[DDIR_READ] + o->rate_iops_min[DDIR_WRITE] + o->rate_iops_min[DDIR_TRIM]))) {
log_err("fio: rate and rate_iops are mutually exclusive\n");
ret = 1;
}
if ((o->rate[DDIR_READ] && (o->rate[DDIR_READ] < o->ratemin[DDIR_READ])) ||
(o->rate[DDIR_WRITE] && (o->rate[DDIR_WRITE] < o->ratemin[DDIR_WRITE])) ||
(o->rate[DDIR_TRIM] && (o->rate[DDIR_TRIM] < o->ratemin[DDIR_TRIM])) ||
(o->rate_iops[DDIR_READ] && (o->rate_iops[DDIR_READ] < o->rate_iops_min[DDIR_READ])) ||
(o->rate_iops[DDIR_WRITE] && (o->rate_iops[DDIR_WRITE] < o->rate_iops_min[DDIR_WRITE])) ||
(o->rate_iops[DDIR_TRIM] && (o->rate_iops[DDIR_TRIM] < o->rate_iops_min[DDIR_TRIM]))) {
log_err("fio: minimum rate exceeds rate\n");
ret = 1;
}
if (!o->timeout && o->time_based) {
log_err("fio: time_based requires a runtime/timeout setting\n");
o->time_based = 0;
ret = warnings_fatal;
}
if (o->fill_device && !o->size)
o->size = -1ULL;
if (o->verify != VERIFY_NONE) {
if (td_write(td) && o->do_verify && o->numjobs > 1) {
log_info("Multiple writers may overwrite blocks that "
"belong to other jobs. This can cause "
"verification failures.\n");
ret = warnings_fatal;
}
if (!fio_option_is_set(o, refill_buffers))
o->refill_buffers = 1;
if (o->max_bs[DDIR_WRITE] != o->min_bs[DDIR_WRITE] &&
!o->verify_interval)
o->verify_interval = o->min_bs[DDIR_WRITE];
/*
* Verify interval must be smaller or equal to the
* write size.
*/
if (o->verify_interval > o->min_bs[DDIR_WRITE])
o->verify_interval = o->min_bs[DDIR_WRITE];
else if (td_read(td) && o->verify_interval > o->min_bs[DDIR_READ])
o->verify_interval = o->min_bs[DDIR_READ];
}
if (o->pre_read) {
o->invalidate_cache = 0;
if (td->io_ops->flags & FIO_PIPEIO) {
log_info("fio: cannot pre-read files with an IO engine"
" that isn't seekable. Pre-read disabled.\n");
ret = warnings_fatal;
}
}
if (!o->unit_base) {
if (td->io_ops->flags & FIO_BIT_BASED)
o->unit_base = 1;
else
o->unit_base = 8;
}
#ifndef CONFIG_FDATASYNC
if (o->fdatasync_blocks) {
log_info("fio: this platform does not support fdatasync()"
" falling back to using fsync(). Use the 'fsync'"
" option instead of 'fdatasync' to get rid of"
" this warning\n");
o->fsync_blocks = o->fdatasync_blocks;
o->fdatasync_blocks = 0;
ret = warnings_fatal;
}
#endif
#ifdef WIN32
/*
* Windows doesn't support O_DIRECT or O_SYNC with the _open interface,
* so fail if we're passed those flags
*/
if ((td->io_ops->flags & FIO_SYNCIO) && (td->o.odirect || td->o.sync_io)) {
log_err("fio: Windows does not support direct or non-buffered io with"
" the synchronous ioengines. Use the 'windowsaio' ioengine"
" with 'direct=1' and 'iodepth=1' instead.\n");
ret = 1;
}
#endif
/*
* For fully compressible data, just zero them at init time.
* It's faster than repeatedly filling it.
*/
if (td->o.compress_percentage == 100) {
td->o.zero_buffers = 1;
td->o.compress_percentage = 0;
}
/*
* Using a non-uniform random distribution excludes usage of
* a random map
*/
if (td->o.random_distribution != FIO_RAND_DIST_RANDOM)
td->o.norandommap = 1;
/*
* If size is set but less than the min block size, complain
*/
if (o->size && o->size < td_min_bs(td)) {
log_err("fio: size too small, must be larger than the IO size: %llu\n", (unsigned long long) o->size);
ret = 1;
}
/*
* O_ATOMIC implies O_DIRECT
*/
if (td->o.oatomic)
td->o.odirect = 1;
/*
* If randseed is set, that overrides randrepeat
*/
if (fio_option_is_set(&td->o, rand_seed))
td->o.rand_repeatable = 0;
if ((td->io_ops->flags & FIO_NOEXTEND) && td->o.file_append) {
log_err("fio: can't append/extent with IO engine %s\n", td->io_ops->name);
ret = 1;
}
if (fio_option_is_set(o, gtod_cpu)) {
fio_gtod_init();
fio_gtod_set_cpu(o->gtod_cpu);
fio_gtod_offload = 1;
}
td->loops = o->loops;
if (!td->loops)
td->loops = 1;
if (td->o.block_error_hist && td->o.nr_files != 1) {
log_err("fio: block error histogram only available with "
"with a single file per job, but %d files "
"provided\n", td->o.nr_files);
ret = 1;
}
return ret;
}
/*
* This function leaks the buffer
*/
char *fio_uint_to_kmg(unsigned int val)
{
char *buf = malloc(32);
char post[] = { 0, 'K', 'M', 'G', 'P', 'E', 0 };
char *p = post;
do {
if (val & 1023)
break;
val >>= 10;
p++;
} while (*p);
snprintf(buf, 32, "%u%c", val, *p);
return buf;
}
/* External engines are specified by "external:name.o") */
static const char *get_engine_name(const char *str)
{
char *p = strstr(str, ":");
if (!p)
return str;
p++;
strip_blank_front(&p);
strip_blank_end(p);
return p;
}
static int exists_and_not_file(const char *filename)
{
struct stat sb;
if (lstat(filename, &sb) == -1)
return 0;
/* \\.\ is the device namespace in Windows, where every file
* is a device node */
if (S_ISREG(sb.st_mode) && strncmp(filename, "\\\\.\\", 4) != 0)
return 0;
return 1;
}
static void td_fill_rand_seeds_internal(struct thread_data *td, int use64)
{
init_rand_seed(&td->bsrange_state, td->rand_seeds[FIO_RAND_BS_OFF], use64);
init_rand_seed(&td->verify_state, td->rand_seeds[FIO_RAND_VER_OFF], use64);
init_rand_seed(&td->rwmix_state, td->rand_seeds[FIO_RAND_MIX_OFF], use64);
if (td->o.file_service_type == FIO_FSERVICE_RANDOM)
init_rand_seed(&td->next_file_state, td->rand_seeds[FIO_RAND_FILE_OFF], use64);
init_rand_seed(&td->file_size_state, td->rand_seeds[FIO_RAND_FILE_SIZE_OFF], use64);
init_rand_seed(&td->trim_state, td->rand_seeds[FIO_RAND_TRIM_OFF], use64);
init_rand_seed(&td->delay_state, td->rand_seeds[FIO_RAND_START_DELAY], use64);
if (!td_random(td))
return;
if (td->o.rand_repeatable)
td->rand_seeds[FIO_RAND_BLOCK_OFF] = FIO_RANDSEED * td->thread_number;
init_rand_seed(&td->random_state, td->rand_seeds[FIO_RAND_BLOCK_OFF], use64);
init_rand_seed(&td->seq_rand_state[DDIR_READ], td->rand_seeds[FIO_RAND_SEQ_RAND_READ_OFF], use64);
init_rand_seed(&td->seq_rand_state[DDIR_WRITE], td->rand_seeds[FIO_RAND_SEQ_RAND_WRITE_OFF], use64);
init_rand_seed(&td->seq_rand_state[DDIR_TRIM], td->rand_seeds[FIO_RAND_SEQ_RAND_TRIM_OFF], use64);
}
void td_fill_rand_seeds(struct thread_data *td)
{
int use64;
if (td->o.allrand_repeatable) {
unsigned int i;
for (i = 0; i < FIO_RAND_NR_OFFS; i++)
td->rand_seeds[i] = FIO_RANDSEED * td->thread_number
+ i;
}
if (td->o.random_generator == FIO_RAND_GEN_TAUSWORTHE64)
use64 = 1;
else
use64 = 0;
td_fill_rand_seeds_internal(td, use64);
init_rand_seed(&td->buf_state, td->rand_seeds[FIO_RAND_BUF_OFF], use64);
frand_copy(&td->buf_state_prev, &td->buf_state);
init_rand_seed(&td->dedupe_state, td->rand_seeds[FIO_DEDUPE_OFF], use64);
}
/*
* Initializes the ioengine configured for a job, if it has not been done so
* already.
*/
int ioengine_load(struct thread_data *td)
{
const char *engine;
/*
* Engine has already been loaded.
*/
if (td->io_ops)
return 0;
if (!td->o.ioengine) {
log_err("fio: internal fault, no IO engine specified\n");
return 1;
}
engine = get_engine_name(td->o.ioengine);
td->io_ops = load_ioengine(td, engine);
if (!td->io_ops) {
log_err("fio: failed to load engine %s\n", engine);
return 1;
}
if (td->io_ops->option_struct_size && td->io_ops->options) {
/*
* In cases where td->eo is set, clone it for a child thread.
* This requires that the parent thread has the same ioengine,
* but that requirement must be enforced by the code which
* cloned the thread.
*/
void *origeo = td->eo;
/*
* Otherwise use the default thread options.
*/
if (!origeo && td != &def_thread && def_thread.eo &&
def_thread.io_ops->options == td->io_ops->options)
origeo = def_thread.eo;
options_init(td->io_ops->options);
td->eo = malloc(td->io_ops->option_struct_size);
/*
* Use the default thread as an option template if this uses the
* same options structure and there are non-default options
* used.
*/
if (origeo) {
memcpy(td->eo, origeo, td->io_ops->option_struct_size);
options_mem_dupe(td->eo, td->io_ops->options);
} else {
memset(td->eo, 0, td->io_ops->option_struct_size);
fill_default_options(td->eo, td->io_ops->options);
}
*(struct thread_data **)td->eo = td;
}
return 0;
}
static void init_flags(struct thread_data *td)
{
struct thread_options *o = &td->o;
if (o->verify_backlog)
td->flags |= TD_F_VER_BACKLOG;
if (o->trim_backlog)
td->flags |= TD_F_TRIM_BACKLOG;
if (o->read_iolog_file)
td->flags |= TD_F_READ_IOLOG;
if (o->refill_buffers)
td->flags |= TD_F_REFILL_BUFFERS;
/*
* Always scramble buffers if asked to
*/
if (o->scramble_buffers && fio_option_is_set(o, scramble_buffers))
td->flags |= TD_F_SCRAMBLE_BUFFERS;
/*
* But also scramble buffers, unless we were explicitly asked
* to zero them.
*/
if (o->scramble_buffers && !(o->zero_buffers &&
fio_option_is_set(o, zero_buffers)))
td->flags |= TD_F_SCRAMBLE_BUFFERS;
if (o->verify != VERIFY_NONE)
td->flags |= TD_F_VER_NONE;
if (o->verify_async || o->io_submit_mode == IO_MODE_OFFLOAD)
td->flags |= TD_F_NEED_LOCK;
}
static int setup_random_seeds(struct thread_data *td)
{
unsigned long seed;
unsigned int i;
if (!td->o.rand_repeatable && !fio_option_is_set(&td->o, rand_seed))
return init_random_state(td, td->rand_seeds, sizeof(td->rand_seeds));
seed = td->o.rand_seed;
for (i = 0; i < 4; i++)
seed *= 0x9e370001UL;
for (i = 0; i < FIO_RAND_NR_OFFS; i++) {
td->rand_seeds[i] = seed;
seed *= 0x9e370001UL;
}
td_fill_rand_seeds(td);