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-rw-r--r--backend.c2457
1 files changed, 0 insertions, 2457 deletions
diff --git a/backend.c b/backend.c
deleted file mode 100644
index 9a684edb..00000000
--- a/backend.c
+++ /dev/null
@@ -1,2457 +0,0 @@
-/*
- * fio - the flexible io tester
- *
- * Copyright (C) 2005 Jens Axboe <axboe@suse.de>
- * Copyright (C) 2006-2012 Jens Axboe <axboe@kernel.dk>
- *
- * The license below covers all files distributed with fio unless otherwise
- * noted in the file itself.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- */
-#include <unistd.h>
-#include <fcntl.h>
-#include <string.h>
-#include <limits.h>
-#include <signal.h>
-#include <time.h>
-#include <locale.h>
-#include <assert.h>
-#include <time.h>
-#include <inttypes.h>
-#include <sys/stat.h>
-#include <sys/wait.h>
-#include <sys/ipc.h>
-#include <sys/mman.h>
-#include <math.h>
-
-#include "fio.h"
-#ifndef FIO_NO_HAVE_SHM_H
-#include <sys/shm.h>
-#endif
-#include "hash.h"
-#include "smalloc.h"
-#include "verify.h"
-#include "trim.h"
-#include "diskutil.h"
-#include "cgroup.h"
-#include "profile.h"
-#include "lib/rand.h"
-#include "lib/memalign.h"
-#include "server.h"
-#include "lib/getrusage.h"
-#include "idletime.h"
-#include "err.h"
-#include "workqueue.h"
-#include "lib/mountcheck.h"
-#include "rate-submit.h"
-#include "helper_thread.h"
-
-static struct fio_mutex *startup_mutex;
-static struct flist_head *cgroup_list;
-static char *cgroup_mnt;
-static int exit_value;
-static volatile int fio_abort;
-static unsigned int nr_process = 0;
-static unsigned int nr_thread = 0;
-
-struct io_log *agg_io_log[DDIR_RWDIR_CNT];
-
-int groupid = 0;
-unsigned int thread_number = 0;
-unsigned int stat_number = 0;
-int shm_id = 0;
-int temp_stall_ts;
-unsigned long done_secs = 0;
-
-#define JOB_START_TIMEOUT (5 * 1000)
-
-static void sig_int(int sig)
-{
- if (threads) {
- if (is_backend)
- fio_server_got_signal(sig);
- else {
- log_info("\nfio: terminating on signal %d\n", sig);
- log_info_flush();
- exit_value = 128;
- }
-
- fio_terminate_threads(TERMINATE_ALL);
- }
-}
-
-void sig_show_status(int sig)
-{
- show_running_run_stats();
-}
-
-static void set_sig_handlers(void)
-{
- struct sigaction act;
-
- memset(&act, 0, sizeof(act));
- act.sa_handler = sig_int;
- act.sa_flags = SA_RESTART;
- sigaction(SIGINT, &act, NULL);
-
- memset(&act, 0, sizeof(act));
- act.sa_handler = sig_int;
- act.sa_flags = SA_RESTART;
- sigaction(SIGTERM, &act, NULL);
-
-/* Windows uses SIGBREAK as a quit signal from other applications */
-#ifdef WIN32
- memset(&act, 0, sizeof(act));
- act.sa_handler = sig_int;
- act.sa_flags = SA_RESTART;
- sigaction(SIGBREAK, &act, NULL);
-#endif
-
- memset(&act, 0, sizeof(act));
- act.sa_handler = sig_show_status;
- act.sa_flags = SA_RESTART;
- sigaction(SIGUSR1, &act, NULL);
-
- if (is_backend) {
- memset(&act, 0, sizeof(act));
- act.sa_handler = sig_int;
- act.sa_flags = SA_RESTART;
- sigaction(SIGPIPE, &act, NULL);
- }
-}
-
-/*
- * Check if we are above the minimum rate given.
- */
-static bool __check_min_rate(struct thread_data *td, struct timeval *now,
- enum fio_ddir ddir)
-{
- unsigned long long bytes = 0;
- unsigned long iops = 0;
- unsigned long spent;
- unsigned long rate;
- unsigned int ratemin = 0;
- unsigned int rate_iops = 0;
- unsigned int rate_iops_min = 0;
-
- assert(ddir_rw(ddir));
-
- if (!td->o.ratemin[ddir] && !td->o.rate_iops_min[ddir])
- return false;
-
- /*
- * allow a 2 second settle period in the beginning
- */
- if (mtime_since(&td->start, now) < 2000)
- return false;
-
- iops += td->this_io_blocks[ddir];
- bytes += td->this_io_bytes[ddir];
- ratemin += td->o.ratemin[ddir];
- rate_iops += td->o.rate_iops[ddir];
- rate_iops_min += td->o.rate_iops_min[ddir];
-
- /*
- * if rate blocks is set, sample is running
- */
- if (td->rate_bytes[ddir] || td->rate_blocks[ddir]) {
- spent = mtime_since(&td->lastrate[ddir], now);
- if (spent < td->o.ratecycle)
- return false;
-
- if (td->o.rate[ddir] || td->o.ratemin[ddir]) {
- /*
- * check bandwidth specified rate
- */
- if (bytes < td->rate_bytes[ddir]) {
- log_err("%s: rate_min=%uB/s not met, only transferred %lluB\n",
- td->o.name, ratemin, bytes);
- return true;
- } else {
- if (spent)
- rate = ((bytes - td->rate_bytes[ddir]) * 1000) / spent;
- else
- rate = 0;
-
- if (rate < ratemin ||
- bytes < td->rate_bytes[ddir]) {
- log_err("%s: rate_min=%uB/s not met, got %luB/s\n",
- td->o.name, ratemin, rate);
- return true;
- }
- }
- } else {
- /*
- * checks iops specified rate
- */
- if (iops < rate_iops) {
- log_err("%s: rate_iops_min=%u not met, only performed %lu IOs\n",
- td->o.name, rate_iops, iops);
- return true;
- } else {
- if (spent)
- rate = ((iops - td->rate_blocks[ddir]) * 1000) / spent;
- else
- rate = 0;
-
- if (rate < rate_iops_min ||
- iops < td->rate_blocks[ddir]) {
- log_err("%s: rate_iops_min=%u not met, got %lu IOPS\n",
- td->o.name, rate_iops_min, rate);
- return true;
- }
- }
- }
- }
-
- td->rate_bytes[ddir] = bytes;
- td->rate_blocks[ddir] = iops;
- memcpy(&td->lastrate[ddir], now, sizeof(*now));
- return false;
-}
-
-static bool check_min_rate(struct thread_data *td, struct timeval *now)
-{
- bool ret = false;
-
- if (td->bytes_done[DDIR_READ])
- ret |= __check_min_rate(td, now, DDIR_READ);
- if (td->bytes_done[DDIR_WRITE])
- ret |= __check_min_rate(td, now, DDIR_WRITE);
- if (td->bytes_done[DDIR_TRIM])
- ret |= __check_min_rate(td, now, DDIR_TRIM);
-
- return ret;
-}
-
-/*
- * When job exits, we can cancel the in-flight IO if we are using async
- * io. Attempt to do so.
- */
-static void cleanup_pending_aio(struct thread_data *td)
-{
- int r;
-
- /*
- * get immediately available events, if any
- */
- r = io_u_queued_complete(td, 0);
- if (r < 0)
- return;
-
- /*
- * now cancel remaining active events
- */
- if (td->io_ops->cancel) {
- struct io_u *io_u;
- int i;
-
- io_u_qiter(&td->io_u_all, io_u, i) {
- if (io_u->flags & IO_U_F_FLIGHT) {
- r = td->io_ops->cancel(td, io_u);
- if (!r)
- put_io_u(td, io_u);
- }
- }
- }
-
- if (td->cur_depth)
- r = io_u_queued_complete(td, td->cur_depth);
-}
-
-/*
- * Helper to handle the final sync of a file. Works just like the normal
- * io path, just does everything sync.
- */
-static bool fio_io_sync(struct thread_data *td, struct fio_file *f)
-{
- struct io_u *io_u = __get_io_u(td);
- int ret;
-
- if (!io_u)
- return true;
-
- io_u->ddir = DDIR_SYNC;
- io_u->file = f;
-
- if (td_io_prep(td, io_u)) {
- put_io_u(td, io_u);
- return true;
- }
-
-requeue:
- ret = td_io_queue(td, io_u);
- if (ret < 0) {
- td_verror(td, io_u->error, "td_io_queue");
- put_io_u(td, io_u);
- return true;
- } else if (ret == FIO_Q_QUEUED) {
- if (td_io_commit(td))
- return true;
- if (io_u_queued_complete(td, 1) < 0)
- return true;
- } else if (ret == FIO_Q_COMPLETED) {
- if (io_u->error) {
- td_verror(td, io_u->error, "td_io_queue");
- return true;
- }
-
- if (io_u_sync_complete(td, io_u) < 0)
- return true;
- } else if (ret == FIO_Q_BUSY) {
- if (td_io_commit(td))
- return true;
- goto requeue;
- }
-
- return false;
-}
-
-static int fio_file_fsync(struct thread_data *td, struct fio_file *f)
-{
- int ret;
-
- if (fio_file_open(f))
- return fio_io_sync(td, f);
-
- if (td_io_open_file(td, f))
- return 1;
-
- ret = fio_io_sync(td, f);
- td_io_close_file(td, f);
- return ret;
-}
-
-static inline void __update_tv_cache(struct thread_data *td)
-{
- fio_gettime(&td->tv_cache, NULL);
-}
-
-static inline void update_tv_cache(struct thread_data *td)
-{
- if ((++td->tv_cache_nr & td->tv_cache_mask) == td->tv_cache_mask)
- __update_tv_cache(td);
-}
-
-static inline bool runtime_exceeded(struct thread_data *td, struct timeval *t)
-{
- if (in_ramp_time(td))
- return false;
- if (!td->o.timeout)
- return false;
- if (utime_since(&td->epoch, t) >= td->o.timeout)
- return true;
-
- return false;
-}
-
-/*
- * We need to update the runtime consistently in ms, but keep a running
- * tally of the current elapsed time in microseconds for sub millisecond
- * updates.
- */
-static inline void update_runtime(struct thread_data *td,
- unsigned long long *elapsed_us,
- const enum fio_ddir ddir)
-{
- if (ddir == DDIR_WRITE && td_write(td) && td->o.verify_only)
- return;
-
- td->ts.runtime[ddir] -= (elapsed_us[ddir] + 999) / 1000;
- elapsed_us[ddir] += utime_since_now(&td->start);
- td->ts.runtime[ddir] += (elapsed_us[ddir] + 999) / 1000;
-}
-
-static bool break_on_this_error(struct thread_data *td, enum fio_ddir ddir,
- int *retptr)
-{
- int ret = *retptr;
-
- if (ret < 0 || td->error) {
- int err = td->error;
- enum error_type_bit eb;
-
- if (ret < 0)
- err = -ret;
-
- eb = td_error_type(ddir, err);
- if (!(td->o.continue_on_error & (1 << eb)))
- return true;
-
- if (td_non_fatal_error(td, eb, err)) {
- /*
- * Continue with the I/Os in case of
- * a non fatal error.
- */
- update_error_count(td, err);
- td_clear_error(td);
- *retptr = 0;
- return false;
- } else if (td->o.fill_device && err == ENOSPC) {
- /*
- * We expect to hit this error if
- * fill_device option is set.
- */
- td_clear_error(td);
- fio_mark_td_terminate(td);
- return true;
- } else {
- /*
- * Stop the I/O in case of a fatal
- * error.
- */
- update_error_count(td, err);
- return true;
- }
- }
-
- return false;
-}
-
-static void check_update_rusage(struct thread_data *td)
-{
- if (td->update_rusage) {
- td->update_rusage = 0;
- update_rusage_stat(td);
- fio_mutex_up(td->rusage_sem);
- }
-}
-
-static int wait_for_completions(struct thread_data *td, struct timeval *time)
-{
- const int full = queue_full(td);
- int min_evts = 0;
- int ret;
-
- if (td->flags & TD_F_REGROW_LOGS)
- return io_u_quiesce(td);
-
- /*
- * if the queue is full, we MUST reap at least 1 event
- */
- min_evts = min(td->o.iodepth_batch_complete_min, td->cur_depth);
- if ((full && !min_evts) || !td->o.iodepth_batch_complete_min)
- min_evts = 1;
-
- if (time && (__should_check_rate(td, DDIR_READ) ||
- __should_check_rate(td, DDIR_WRITE) ||
- __should_check_rate(td, DDIR_TRIM)))
- fio_gettime(time, NULL);
-
- do {
- ret = io_u_queued_complete(td, min_evts);
- if (ret < 0)
- break;
- } while (full && (td->cur_depth > td->o.iodepth_low));
-
- return ret;
-}
-
-int io_queue_event(struct thread_data *td, struct io_u *io_u, int *ret,
- enum fio_ddir ddir, uint64_t *bytes_issued, int from_verify,
- struct timeval *comp_time)
-{
- int ret2;
-
- switch (*ret) {
- case FIO_Q_COMPLETED:
- if (io_u->error) {
- *ret = -io_u->error;
- clear_io_u(td, io_u);
- } else if (io_u->resid) {
- int bytes = io_u->xfer_buflen - io_u->resid;
- struct fio_file *f = io_u->file;
-
- if (bytes_issued)
- *bytes_issued += bytes;
-
- if (!from_verify)
- trim_io_piece(td, io_u);
-
- /*
- * zero read, fail
- */
- if (!bytes) {
- if (!from_verify)
- unlog_io_piece(td, io_u);
- td_verror(td, EIO, "full resid");
- put_io_u(td, io_u);
- break;
- }
-
- io_u->xfer_buflen = io_u->resid;
- io_u->xfer_buf += bytes;
- io_u->offset += bytes;
-
- if (ddir_rw(io_u->ddir))
- td->ts.short_io_u[io_u->ddir]++;
-
- f = io_u->file;
- if (io_u->offset == f->real_file_size)
- goto sync_done;
-
- requeue_io_u(td, &io_u);
- } else {
-sync_done:
- if (comp_time && (__should_check_rate(td, DDIR_READ) ||
- __should_check_rate(td, DDIR_WRITE) ||
- __should_check_rate(td, DDIR_TRIM)))
- fio_gettime(comp_time, NULL);
-
- *ret = io_u_sync_complete(td, io_u);
- if (*ret < 0)
- break;
- }
-
- if (td->flags & TD_F_REGROW_LOGS)
- regrow_logs(td);
-
- /*
- * when doing I/O (not when verifying),
- * check for any errors that are to be ignored
- */
- if (!from_verify)
- break;
-
- return 0;
- case FIO_Q_QUEUED:
- /*
- * if the engine doesn't have a commit hook,
- * the io_u is really queued. if it does have such
- * a hook, it has to call io_u_queued() itself.
- */
- if (td->io_ops->commit == NULL)
- io_u_queued(td, io_u);
- if (bytes_issued)
- *bytes_issued += io_u->xfer_buflen;
- break;
- case FIO_Q_BUSY:
- if (!from_verify)
- unlog_io_piece(td, io_u);
- requeue_io_u(td, &io_u);
- ret2 = td_io_commit(td);
- if (ret2 < 0)
- *ret = ret2;
- break;
- default:
- assert(*ret < 0);
- td_verror(td, -(*ret), "td_io_queue");
- break;
- }
-
- if (break_on_this_error(td, ddir, ret))
- return 1;
-
- return 0;
-}
-
-static inline bool io_in_polling(struct thread_data *td)
-{
- return !td->o.iodepth_batch_complete_min &&
- !td->o.iodepth_batch_complete_max;
-}
-/*
- * Unlinks files from thread data fio_file structure
- */
-static int unlink_all_files(struct thread_data *td)
-{
- struct fio_file *f;
- unsigned int i;
- int ret = 0;
-
- for_each_file(td, f, i) {
- if (f->filetype != FIO_TYPE_FILE)
- continue;
- ret = td_io_unlink_file(td, f);
- if (ret)
- break;
- }
-
- if (ret)
- td_verror(td, ret, "unlink_all_files");
-
- return ret;
-}
-
-/*
- * The main verify engine. Runs over the writes we previously submitted,
- * reads the blocks back in, and checks the crc/md5 of the data.
- */
-static void do_verify(struct thread_data *td, uint64_t verify_bytes)
-{
- struct fio_file *f;
- struct io_u *io_u;
- int ret, min_events;
- unsigned int i;
-
- dprint(FD_VERIFY, "starting loop\n");
-
- /*
- * sync io first and invalidate cache, to make sure we really
- * read from disk.
- */
- for_each_file(td, f, i) {
- if (!fio_file_open(f))
- continue;
- if (fio_io_sync(td, f))
- break;
- if (file_invalidate_cache(td, f))
- break;
- }
-
- check_update_rusage(td);
-
- if (td->error)
- return;
-
- /*
- * verify_state needs to be reset before verification
- * proceeds so that expected random seeds match actual
- * random seeds in headers. The main loop will reset
- * all random number generators if randrepeat is set.
- */
- if (!td->o.rand_repeatable)
- td_fill_verify_state_seed(td);
-
- td_set_runstate(td, TD_VERIFYING);
-
- io_u = NULL;
- while (!td->terminate) {
- enum fio_ddir ddir;
- int full;
-
- update_tv_cache(td);
- check_update_rusage(td);
-
- if (runtime_exceeded(td, &td->tv_cache)) {
- __update_tv_cache(td);
- if (runtime_exceeded(td, &td->tv_cache)) {
- fio_mark_td_terminate(td);
- break;
- }
- }
-
- if (flow_threshold_exceeded(td))
- continue;
-
- if (!td->o.experimental_verify) {
- io_u = __get_io_u(td);
- if (!io_u)
- break;
-
- if (get_next_verify(td, io_u)) {
- put_io_u(td, io_u);
- break;
- }
-
- if (td_io_prep(td, io_u)) {
- put_io_u(td, io_u);
- break;
- }
- } else {
- if (ddir_rw_sum(td->bytes_done) + td->o.rw_min_bs > verify_bytes)
- break;
-
- while ((io_u = get_io_u(td)) != NULL) {
- if (IS_ERR_OR_NULL(io_u)) {
- io_u = NULL;
- ret = FIO_Q_BUSY;
- goto reap;
- }
-
- /*
- * We are only interested in the places where
- * we wrote or trimmed IOs. Turn those into
- * reads for verification purposes.
- */
- if (io_u->ddir == DDIR_READ) {
- /*
- * Pretend we issued it for rwmix
- * accounting
- */
- td->io_issues[DDIR_READ]++;
- put_io_u(td, io_u);
- continue;
- } else if (io_u->ddir == DDIR_TRIM) {
- io_u->ddir = DDIR_READ;
- io_u_set(td, io_u, IO_U_F_TRIMMED);
- break;
- } else if (io_u->ddir == DDIR_WRITE) {
- io_u->ddir = DDIR_READ;
- break;
- } else {
- put_io_u(td, io_u);
- continue;
- }
- }
-
- if (!io_u)
- break;
- }
-
- if (verify_state_should_stop(td, io_u)) {
- put_io_u(td, io_u);
- break;
- }
-
- if (td->o.verify_async)
- io_u->end_io = verify_io_u_async;
- else
- io_u->end_io = verify_io_u;
-
- ddir = io_u->ddir;
- if (!td->o.disable_slat)
- fio_gettime(&io_u->start_time, NULL);
-
- ret = td_io_queue(td, io_u);
-
- if (io_queue_event(td, io_u, &ret, ddir, NULL, 1, NULL))
- break;
-
- /*
- * if we can queue more, do so. but check if there are
- * completed io_u's first. Note that we can get BUSY even
- * without IO queued, if the system is resource starved.
- */
-reap:
- full = queue_full(td) || (ret == FIO_Q_BUSY && td->cur_depth);
- if (full || io_in_polling(td))
- ret = wait_for_completions(td, NULL);
-
- if (ret < 0)
- break;
- }
-
- check_update_rusage(td);
-
- if (!td->error) {
- min_events = td->cur_depth;
-
- if (min_events)
- ret = io_u_queued_complete(td, min_events);
- } else
- cleanup_pending_aio(td);
-
- td_set_runstate(td, TD_RUNNING);
-
- dprint(FD_VERIFY, "exiting loop\n");
-}
-
-static bool exceeds_number_ios(struct thread_data *td)
-{
- unsigned long long number_ios;
-
- if (!td->o.number_ios)
- return false;
-
- number_ios = ddir_rw_sum(td->io_blocks);
- number_ios += td->io_u_queued + td->io_u_in_flight;
-
- return number_ios >= (td->o.number_ios * td->loops);
-}
-
-static bool io_bytes_exceeded(struct thread_data *td, uint64_t *this_bytes)
-{
- unsigned long long bytes, limit;
-
- if (td_rw(td))
- bytes = this_bytes[DDIR_READ] + this_bytes[DDIR_WRITE];
- else if (td_write(td))
- bytes = this_bytes[DDIR_WRITE];
- else if (td_read(td))
- bytes = this_bytes[DDIR_READ];
- else
- bytes = this_bytes[DDIR_TRIM];
-
- if (td->o.io_size)
- limit = td->o.io_size;
- else
- limit = td->o.size;
-
- limit *= td->loops;
- return bytes >= limit || exceeds_number_ios(td);
-}
-
-static bool io_issue_bytes_exceeded(struct thread_data *td)
-{
- return io_bytes_exceeded(td, td->io_issue_bytes);
-}
-
-static bool io_complete_bytes_exceeded(struct thread_data *td)
-{
- return io_bytes_exceeded(td, td->this_io_bytes);
-}
-
-/*
- * used to calculate the next io time for rate control
- *
- */
-static long long usec_for_io(struct thread_data *td, enum fio_ddir ddir)
-{
- uint64_t secs, remainder, bps, bytes, iops;
-
- assert(!(td->flags & TD_F_CHILD));
- bytes = td->rate_io_issue_bytes[ddir];
- bps = td->rate_bps[ddir];
-
- if (td->o.rate_process == RATE_PROCESS_POISSON) {
- uint64_t val;
- iops = bps / td->o.bs[ddir];
- val = (int64_t) (1000000 / iops) *
- -logf(__rand_0_1(&td->poisson_state[ddir]));
- if (val) {
- dprint(FD_RATE, "poisson rate iops=%llu, ddir=%d\n",
- (unsigned long long) 1000000 / val,
- ddir);
- }
- td->last_usec[ddir] += val;
- return td->last_usec[ddir];
- } else if (bps) {
- secs = bytes / bps;
- remainder = bytes % bps;
- return remainder * 1000000 / bps + secs * 1000000;
- }
-
- return 0;
-}
-
-/*
- * Main IO worker function. It retrieves io_u's to process and queues
- * and reaps them, checking for rate and errors along the way.
- *
- * Returns number of bytes written and trimmed.
- */
-static void do_io(struct thread_data *td, uint64_t *bytes_done)
-{
- unsigned int i;
- int ret = 0;
- uint64_t total_bytes, bytes_issued = 0;
-
- for (i = 0; i < DDIR_RWDIR_CNT; i++)
- bytes_done[i] = td->bytes_done[i];
-
- if (in_ramp_time(td))
- td_set_runstate(td, TD_RAMP);
- else
- td_set_runstate(td, TD_RUNNING);
-
- lat_target_init(td);
-
- total_bytes = td->o.size;
- /*
- * Allow random overwrite workloads to write up to io_size
- * before starting verification phase as 'size' doesn't apply.
- */
- if (td_write(td) && td_random(td) && td->o.norandommap)
- total_bytes = max(total_bytes, (uint64_t) td->o.io_size);
- /*
- * If verify_backlog is enabled, we'll run the verify in this
- * handler as well. For that case, we may need up to twice the
- * amount of bytes.
- */
- if (td->o.verify != VERIFY_NONE &&
- (td_write(td) && td->o.verify_backlog))
- total_bytes += td->o.size;
-
- /* In trimwrite mode, each byte is trimmed and then written, so
- * allow total_bytes to be twice as big */
- if (td_trimwrite(td))
- total_bytes += td->total_io_size;
-
- while ((td->o.read_iolog_file && !flist_empty(&td->io_log_list)) ||
- (!flist_empty(&td->trim_list)) || !io_issue_bytes_exceeded(td) ||
- td->o.time_based) {
- struct timeval comp_time;
- struct io_u *io_u;
- int full;
- enum fio_ddir ddir;
-
- check_update_rusage(td);
-
- if (td->terminate || td->done)
- break;
-
- update_tv_cache(td);
-
- if (runtime_exceeded(td, &td->tv_cache)) {
- __update_tv_cache(td);
- if (runtime_exceeded(td, &td->tv_cache)) {
- fio_mark_td_terminate(td);
- break;
- }
- }
-
- if (flow_threshold_exceeded(td))
- continue;
-
- /*
- * Break if we exceeded the bytes. The exception is time
- * based runs, but we still need to break out of the loop
- * for those to run verification, if enabled.
- */
- if (bytes_issued >= total_bytes &&
- (!td->o.time_based ||
- (td->o.time_based && td->o.verify != VERIFY_NONE)))
- break;
-
- io_u = get_io_u(td);
- if (IS_ERR_OR_NULL(io_u)) {
- int err = PTR_ERR(io_u);
-
- io_u = NULL;
- if (err == -EBUSY) {
- ret = FIO_Q_BUSY;
- goto reap;
- }
- if (td->o.latency_target)
- goto reap;
- break;
- }
-
- ddir = io_u->ddir;
-
- /*
- * Add verification end_io handler if:
- * - Asked to verify (!td_rw(td))
- * - Or the io_u is from our verify list (mixed write/ver)
- */
- if (td->o.verify != VERIFY_NONE && io_u->ddir == DDIR_READ &&
- ((io_u->flags & IO_U_F_VER_LIST) || !td_rw(td))) {
-
- if (!td->o.verify_pattern_bytes) {
- io_u->rand_seed = __rand(&td->verify_state);
- if (sizeof(int) != sizeof(long *))
- io_u->rand_seed *= __rand(&td->verify_state);
- }
-
- if (verify_state_should_stop(td, io_u)) {
- put_io_u(td, io_u);
- break;
- }
-
- if (td->o.verify_async)
- io_u->end_io = verify_io_u_async;
- else
- io_u->end_io = verify_io_u;
- td_set_runstate(td, TD_VERIFYING);
- } else if (in_ramp_time(td))
- td_set_runstate(td, TD_RAMP);
- else
- td_set_runstate(td, TD_RUNNING);
-
- /*
- * Always log IO before it's issued, so we know the specific
- * order of it. The logged unit will track when the IO has
- * completed.
- */
- if (td_write(td) && io_u->ddir == DDIR_WRITE &&
- td->o.do_verify &&
- td->o.verify != VERIFY_NONE &&
- !td->o.experimental_verify)
- log_io_piece(td, io_u);
-
- if (td->o.io_submit_mode == IO_MODE_OFFLOAD) {
- const unsigned long blen = io_u->xfer_buflen;
- const enum fio_ddir ddir = acct_ddir(io_u);
-
- if (td->error)
- break;
-
- workqueue_enqueue(&td->io_wq, &io_u->work);
- ret = FIO_Q_QUEUED;
-
- if (ddir_rw(ddir)) {
- td->io_issues[ddir]++;
- td->io_issue_bytes[ddir] += blen;
- td->rate_io_issue_bytes[ddir] += blen;
- }
-
- if (should_check_rate(td))
- td->rate_next_io_time[ddir] = usec_for_io(td, ddir);
-
- } else {
- ret = td_io_queue(td, io_u);
-
- if (should_check_rate(td))
- td->rate_next_io_time[ddir] = usec_for_io(td, ddir);
-
- if (io_queue_event(td, io_u, &ret, ddir, &bytes_issued, 0, &comp_time))
- break;
-
- /*
- * See if we need to complete some commands. Note that
- * we can get BUSY even without IO queued, if the
- * system is resource starved.
- */
-reap:
- full = queue_full(td) ||
- (ret == FIO_Q_BUSY && td->cur_depth);
- if (full || io_in_polling(td))
- ret = wait_for_completions(td, &comp_time);
- }
- if (ret < 0)
- break;
- if (!ddir_rw_sum(td->bytes_done) &&
- !td_ioengine_flagged(td, FIO_NOIO))
- continue;
-
- if (!in_ramp_time(td) && should_check_rate(td)) {
- if (check_min_rate(td, &comp_time)) {
- if (exitall_on_terminate || td->o.exitall_error)
- fio_terminate_threads(td->groupid);
- td_verror(td, EIO, "check_min_rate");
- break;
- }
- }
- if (!in_ramp_time(td) && td->o.latency_target)
- lat_target_check(td);
-
- if (td->o.thinktime) {
- unsigned long long b;
-
- b = ddir_rw_sum(td->io_blocks);
- if (!(b % td->o.thinktime_blocks)) {
- int left;
-
- io_u_quiesce(td);
-
- if (td->o.thinktime_spin)
- usec_spin(td->o.thinktime_spin);
-
- left = td->o.thinktime - td->o.thinktime_spin;
- if (left)
- usec_sleep(td, left);
- }
- }
- }
-
- check_update_rusage(td);
-
- if (td->trim_entries)
- log_err("fio: %lu trim entries leaked?\n", td->trim_entries);
-
- if (td->o.fill_device && td->error == ENOSPC) {
- td->error = 0;
- fio_mark_td_terminate(td);
- }
- if (!td->error) {
- struct fio_file *f;
-
- if (td->o.io_submit_mode == IO_MODE_OFFLOAD) {
- workqueue_flush(&td->io_wq);
- i = 0;
- } else
- i = td->cur_depth;
-
- if (i) {
- ret = io_u_queued_complete(td, i);
- if (td->o.fill_device && td->error == ENOSPC)
- td->error = 0;
- }
-
- if (should_fsync(td) && td->o.end_fsync) {
- td_set_runstate(td, TD_FSYNCING);
-
- for_each_file(td, f, i) {
- if (!fio_file_fsync(td, f))
- continue;
-
- log_err("fio: end_fsync failed for file %s\n",
- f->file_name);
- }
- }
- } else
- cleanup_pending_aio(td);
-
- /*
- * stop job if we failed doing any IO
- */
- if (!ddir_rw_sum(td->this_io_bytes))
- td->done = 1;
-
- for (i = 0; i < DDIR_RWDIR_CNT; i++)
- bytes_done[i] = td->bytes_done[i] - bytes_done[i];
-}
-
-static void free_file_completion_logging(struct thread_data *td)
-{
- struct fio_file *f;
- unsigned int i;
-
- for_each_file(td, f, i) {
- if (!f->last_write_comp)
- break;
- sfree(f->last_write_comp);
- }
-}
-
-static int init_file_completion_logging(struct thread_data *td,
- unsigned int depth)
-{
- struct fio_file *f;
- unsigned int i;
-
- if (td->o.verify == VERIFY_NONE || !td->o.verify_state_save)
- return 0;
-
- for_each_file(td, f, i) {
- f->last_write_comp = scalloc(depth, sizeof(uint64_t));
- if (!f->last_write_comp)
- goto cleanup;
- }
-
- return 0;
-
-cleanup:
- free_file_completion_logging(td);
- log_err("fio: failed to alloc write comp data\n");
- return 1;
-}
-
-static void cleanup_io_u(struct thread_data *td)
-{
- struct io_u *io_u;
-
- while ((io_u = io_u_qpop(&td->io_u_freelist)) != NULL) {
-
- if (td->io_ops->io_u_free)
- td->io_ops->io_u_free(td, io_u);
-
- fio_memfree(io_u, sizeof(*io_u));
- }
-
- free_io_mem(td);
-
- io_u_rexit(&td->io_u_requeues);
- io_u_qexit(&td->io_u_freelist);
- io_u_qexit(&td->io_u_all);
-
- free_file_completion_logging(td);
-}
-
-static int init_io_u(struct thread_data *td)
-{
- struct io_u *io_u;
- unsigned int max_bs, min_write;
- int cl_align, i, max_units;
- int data_xfer = 1, err;
- char *p;
-
- max_units = td->o.iodepth;
- max_bs = td_max_bs(td);
- min_write = td->o.min_bs[DDIR_WRITE];
- td->orig_buffer_size = (unsigned long long) max_bs
- * (unsigned long long) max_units;
-
- if (td_ioengine_flagged(td, FIO_NOIO) || !(td_read(td) || td_write(td)))
- data_xfer = 0;
-
- err = 0;
- err += io_u_rinit(&td->io_u_requeues, td->o.iodepth);
- err += io_u_qinit(&td->io_u_freelist, td->o.iodepth);
- err += io_u_qinit(&td->io_u_all, td->o.iodepth);
-
- if (err) {
- log_err("fio: failed setting up IO queues\n");
- return 1;
- }
-
- /*
- * if we may later need to do address alignment, then add any
- * possible adjustment here so that we don't cause a buffer
- * overflow later. this adjustment may be too much if we get
- * lucky and the allocator gives us an aligned address.
- */
- if (td->o.odirect || td->o.mem_align || td->o.oatomic ||
- td_ioengine_flagged(td, FIO_RAWIO))
- td->orig_buffer_size += page_mask + td->o.mem_align;
-
- if (td->o.mem_type == MEM_SHMHUGE || td->o.mem_type == MEM_MMAPHUGE) {
- unsigned long bs;
-
- bs = td->orig_buffer_size + td->o.hugepage_size - 1;
- td->orig_buffer_size = bs & ~(td->o.hugepage_size - 1);
- }
-
- if (td->orig_buffer_size != (size_t) td->orig_buffer_size) {
- log_err("fio: IO memory too large. Reduce max_bs or iodepth\n");
- return 1;
- }
-
- if (data_xfer && allocate_io_mem(td))
- return 1;
-
- if (td->o.odirect || td->o.mem_align || td->o.oatomic ||
- td_ioengine_flagged(td, FIO_RAWIO))
- p = PTR_ALIGN(td->orig_buffer, page_mask) + td->o.mem_align;
- else
- p = td->orig_buffer;
-
- cl_align = os_cache_line_size();
-
- for (i = 0; i < max_units; i++) {
- void *ptr;
-
- if (td->terminate)
- return 1;
-
- ptr = fio_memalign(cl_align, sizeof(*io_u));
- if (!ptr) {
- log_err("fio: unable to allocate aligned memory\n");
- break;
- }
-
- io_u = ptr;
- memset(io_u, 0, sizeof(*io_u));
- INIT_FLIST_HEAD(&io_u->verify_list);
- dprint(FD_MEM, "io_u alloc %p, index %u\n", io_u, i);
-
- if (data_xfer) {
- io_u->buf = p;
- dprint(FD_MEM, "io_u %p, mem %p\n", io_u, io_u->buf);
-
- if (td_write(td))
- io_u_fill_buffer(td, io_u, min_write, max_bs);
- if (td_write(td) && td->o.verify_pattern_bytes) {
- /*
- * Fill the buffer with the pattern if we are
- * going to be doing writes.
- */
- fill_verify_pattern(td, io_u->buf, max_bs, io_u, 0, 0);
- }
- }
-
- io_u->index = i;
- io_u->flags = IO_U_F_FREE;
- io_u_qpush(&td->io_u_freelist, io_u);
-
- /*
- * io_u never leaves this stack, used for iteration of all
- * io_u buffers.
- */
- io_u_qpush(&td->io_u_all, io_u);
-
- if (td->io_ops->io_u_init) {
- int ret = td->io_ops->io_u_init(td, io_u);
-
- if (ret) {
- log_err("fio: failed to init engine data: %d\n", ret);
- return 1;
- }
- }
-
- p += max_bs;
- }
-
- if (init_file_completion_logging(td, max_units))
- return 1;
-
- return 0;
-}
-
-/*
- * This function is Linux specific.
- * FIO_HAVE_IOSCHED_SWITCH enabled currently means it's Linux.
- */
-static int switch_ioscheduler(struct thread_data *td)
-{
-#ifdef FIO_HAVE_IOSCHED_SWITCH
- char tmp[256], tmp2[128];
- FILE *f;
- int ret;
-
- if (td_ioengine_flagged(td, FIO_DISKLESSIO))
- return 0;
-
- assert(td->files && td->files[0]);
- sprintf(tmp, "%s/queue/scheduler", td->files[0]->du->sysfs_root);
-
- f = fopen(tmp, "r+");
- if (!f) {
- if (errno == ENOENT) {
- log_err("fio: os or kernel doesn't support IO scheduler"
- " switching\n");
- return 0;
- }
- td_verror(td, errno, "fopen iosched");
- return 1;
- }
-
- /*
- * Set io scheduler.
- */
- ret = fwrite(td->o.ioscheduler, strlen(td->o.ioscheduler), 1, f);
- if (ferror(f) || ret != 1) {
- td_verror(td, errno, "fwrite");
- fclose(f);
- return 1;
- }
-
- rewind(f);
-
- /*
- * Read back and check that the selected scheduler is now the default.
- */
- memset(tmp, 0, sizeof(tmp));
- ret = fread(tmp, sizeof(tmp), 1, f);
- if (ferror(f) || ret < 0) {
- td_verror(td, errno, "fread");
- fclose(f);
- return 1;
- }
- /*
- * either a list of io schedulers or "none\n" is expected.
- */
- tmp[strlen(tmp) - 1] = '\0';
-
- /*
- * Write to "none" entry doesn't fail, so check the result here.
- */
- if (!strcmp(tmp, "none")) {
- log_err("fio: io scheduler is not tunable\n");
- fclose(f);
- return 0;
- }
-
- sprintf(tmp2, "[%s]", td->o.ioscheduler);
- if (!strstr(tmp, tmp2)) {
- log_err("fio: io scheduler %s not found\n", td->o.ioscheduler);
- td_verror(td, EINVAL, "iosched_switch");
- fclose(f);
- return 1;
- }
-
- fclose(f);
- return 0;
-#else
- return 0;
-#endif
-}
-
-static bool keep_running(struct thread_data *td)
-{
- unsigned long long limit;
-
- if (td->done)
- return false;
- if (td->o.time_based)
- return true;
- if (td->o.loops) {
- td->o.loops--;
- return true;
- }
- if (exceeds_number_ios(td))
- return false;
-
- if (td->o.io_size)
- limit = td->o.io_size;
- else
- limit = td->o.size;
-
- if (limit != -1ULL && ddir_rw_sum(td->io_bytes) < limit) {
- uint64_t diff;
-
- /*
- * If the difference is less than the maximum IO size, we
- * are done.
- */
- diff = limit - ddir_rw_sum(td->io_bytes);
- if (diff < td_max_bs(td))
- return false;
-
- if (fio_files_done(td) && !td->o.io_size)
- return false;
-
- return true;
- }
-
- return false;
-}
-
-static int exec_string(struct thread_options *o, const char *string, const char *mode)
-{
- size_t newlen = strlen(string) + strlen(o->name) + strlen(mode) + 9 + 1;
- int ret;
- char *str;
-
- str = malloc(newlen);
- sprintf(str, "%s &> %s.%s.txt", string, o->name, mode);
-
- log_info("%s : Saving output of %s in %s.%s.txt\n",o->name, mode, o->name, mode);
- ret = system(str);
- if (ret == -1)
- log_err("fio: exec of cmd <%s> failed\n", str);
-
- free(str);
- return ret;
-}
-
-/*
- * Dry run to compute correct state of numberio for verification.
- */
-static uint64_t do_dry_run(struct thread_data *td)
-{
- td_set_runstate(td, TD_RUNNING);
-
- while ((td->o.read_iolog_file && !flist_empty(&td->io_log_list)) ||
- (!flist_empty(&td->trim_list)) || !io_complete_bytes_exceeded(td)) {
- struct io_u *io_u;
- int ret;
-
- if (td->terminate || td->done)
- break;
-
- io_u = get_io_u(td);
- if (IS_ERR_OR_NULL(io_u))
- break;
-
- io_u_set(td, io_u, IO_U_F_FLIGHT);
- io_u->error = 0;
- io_u->resid = 0;
- if (ddir_rw(acct_ddir(io_u)))
- td->io_issues[acct_ddir(io_u)]++;
- if (ddir_rw(io_u->ddir)) {
- io_u_mark_depth(td, 1);
- td->ts.total_io_u[io_u->ddir]++;
- }
-
- if (td_write(td) && io_u->ddir == DDIR_WRITE &&
- td->o.do_verify &&
- td->o.verify != VERIFY_NONE &&
- !td->o.experimental_verify)
- log_io_piece(td, io_u);
-
- ret = io_u_sync_complete(td, io_u);
- (void) ret;
- }
-
- return td->bytes_done[DDIR_WRITE] + td->bytes_done[DDIR_TRIM];
-}
-
-struct fork_data {
- struct thread_data *td;
- struct sk_out *sk_out;
-};
-
-/*
- * Entry point for the thread based jobs. The process based jobs end up
- * here as well, after a little setup.
- */
-static void *thread_main(void *data)
-{
- struct fork_data *fd = data;
- unsigned long long elapsed_us[DDIR_RWDIR_CNT] = { 0, };
- struct thread_data *td = fd->td;
- struct thread_options *o = &td->o;
- struct sk_out *sk_out = fd->sk_out;
- uint64_t bytes_done[DDIR_RWDIR_CNT];
- int deadlock_loop_cnt;
- int clear_state;
- int ret;
-
- sk_out_assign(sk_out);
- free(fd);
-
- if (!o->use_thread) {
- setsid();
- td->pid = getpid();
- } else
- td->pid = gettid();
-
- fio_local_clock_init(o->use_thread);
-
- dprint(FD_PROCESS, "jobs pid=%d started\n", (int) td->pid);
-
- if (is_backend)
- fio_server_send_start(td);
-
- INIT_FLIST_HEAD(&td->io_log_list);
- INIT_FLIST_HEAD(&td->io_hist_list);
- INIT_FLIST_HEAD(&td->verify_list);
- INIT_FLIST_HEAD(&td->trim_list);
- INIT_FLIST_HEAD(&td->next_rand_list);
- td->io_hist_tree = RB_ROOT;
-
- ret = mutex_cond_init_pshared(&td->io_u_lock, &td->free_cond);
- if (ret) {
- td_verror(td, ret, "mutex_cond_init_pshared");
- goto err;
- }
- ret = cond_init_pshared(&td->verify_cond);
- if (ret) {
- td_verror(td, ret, "mutex_cond_pshared");
- goto err;
- }
-
- td_set_runstate(td, TD_INITIALIZED);
- dprint(FD_MUTEX, "up startup_mutex\n");
- fio_mutex_up(startup_mutex);
- dprint(FD_MUTEX, "wait on td->mutex\n");
- fio_mutex_down(td->mutex);
- dprint(FD_MUTEX, "done waiting on td->mutex\n");
-
- /*
- * A new gid requires privilege, so we need to do this before setting
- * the uid.
- */
- if (o->gid != -1U && setgid(o->gid)) {
- td_verror(td, errno, "setgid");
- goto err;
- }
- if (o->uid != -1U && setuid(o->uid)) {
- td_verror(td, errno, "setuid");
- goto err;
- }
-
- /*
- * Do this early, we don't want the compress threads to be limited
- * to the same CPUs as the IO workers. So do this before we set
- * any potential CPU affinity
- */
- if (iolog_compress_init(td, sk_out))
- goto err;
-
- /*
- * If we have a gettimeofday() thread, make sure we exclude that
- * thread from this job
- */
- if (o->gtod_cpu)
- fio_cpu_clear(&o->cpumask, o->gtod_cpu);
-
- /*
- * Set affinity first, in case it has an impact on the memory
- * allocations.
- */
- if (fio_option_is_set(o, cpumask)) {
- if (o->cpus_allowed_policy == FIO_CPUS_SPLIT) {
- ret = fio_cpus_split(&o->cpumask, td->thread_number - 1);
- if (!ret) {
- log_err("fio: no CPUs set\n");
- log_err("fio: Try increasing number of available CPUs\n");
- td_verror(td, EINVAL, "cpus_split");
- goto err;
- }
- }
- ret = fio_setaffinity(td->pid, o->cpumask);
- if (ret == -1) {
- td_verror(td, errno, "cpu_set_affinity");
- goto err;
- }
- }
-
-#ifdef CONFIG_LIBNUMA
- /* numa node setup */
- if (fio_option_is_set(o, numa_cpunodes) ||
- fio_option_is_set(o, numa_memnodes)) {
- struct bitmask *mask;
-
- if (numa_available() < 0) {
- td_verror(td, errno, "Does not support NUMA API\n");
- goto err;
- }
-
- if (fio_option_is_set(o, numa_cpunodes)) {
- mask = numa_parse_nodestring(o->numa_cpunodes);
- ret = numa_run_on_node_mask(mask);
- numa_free_nodemask(mask);
- if (ret == -1) {
- td_verror(td, errno, \
- "numa_run_on_node_mask failed\n");
- goto err;
- }
- }
-
- if (fio_option_is_set(o, numa_memnodes)) {
- mask = NULL;
- if (o->numa_memnodes)
- mask = numa_parse_nodestring(o->numa_memnodes);
-
- switch (o->numa_mem_mode) {
- case MPOL_INTERLEAVE:
- numa_set_interleave_mask(mask);
- break;
- case MPOL_BIND:
- numa_set_membind(mask);
- break;
- case MPOL_LOCAL:
- numa_set_localalloc();
- break;
- case MPOL_PREFERRED:
- numa_set_preferred(o->numa_mem_prefer_node);
- break;
- case MPOL_DEFAULT:
- default:
- break;
- }
-
- if (mask)
- numa_free_nodemask(mask);
-
- }
- }
-#endif
-
- if (fio_pin_memory(td))
- goto err;
-
- /*
- * May alter parameters that init_io_u() will use, so we need to
- * do this first.
- */
- if (init_iolog(td))
- goto err;
-
- if (init_io_u(td))
- goto err;
-
- if (o->verify_async && verify_async_init(td))
- goto err;
-
- if (fio_option_is_set(o, ioprio) ||
- fio_option_is_set(o, ioprio_class)) {
- ret = ioprio_set(IOPRIO_WHO_PROCESS, 0, o->ioprio_class, o->ioprio);
- if (ret == -1) {
- td_verror(td, errno, "ioprio_set");
- goto err;
- }
- }
-
- if (o->cgroup && cgroup_setup(td, cgroup_list, &cgroup_mnt))
- goto err;
-
- errno = 0;
- if (nice(o->nice) == -1 && errno != 0) {
- td_verror(td, errno, "nice");
- goto err;
- }
-
- if (o->ioscheduler && switch_ioscheduler(td))
- goto err;
-
- if (!o->create_serialize && setup_files(td))
- goto err;
-
- if (td_io_init(td))
- goto err;
-
- if (init_random_map(td))
- goto err;
-
- if (o->exec_prerun && exec_string(o, o->exec_prerun, (const char *)"prerun"))
- goto err;
-
- if (o->pre_read) {
- if (pre_read_files(td) < 0)
- goto err;
- }
-
- fio_verify_init(td);
-
- if (rate_submit_init(td, sk_out))
- goto err;
-
- set_epoch_time(td, o->log_unix_epoch);
- fio_getrusage(&td->ru_start);
- memcpy(&td->bw_sample_time, &td->epoch, sizeof(td->epoch));
- memcpy(&td->iops_sample_time, &td->epoch, sizeof(td->epoch));
- memcpy(&td->ss.prev_time, &td->epoch, sizeof(td->epoch));
-
- if (o->ratemin[DDIR_READ] || o->ratemin[DDIR_WRITE] ||
- o->ratemin[DDIR_TRIM]) {
- memcpy(&td->lastrate[DDIR_READ], &td->bw_sample_time,
- sizeof(td->bw_sample_time));
- memcpy(&td->lastrate[DDIR_WRITE], &td->bw_sample_time,
- sizeof(td->bw_sample_time));
- memcpy(&td->lastrate[DDIR_TRIM], &td->bw_sample_time,
- sizeof(td->bw_sample_time));
- }
-
- memset(bytes_done, 0, sizeof(bytes_done));
- clear_state = 0;
-
- while (keep_running(td)) {
- uint64_t verify_bytes;
-
- fio_gettime(&td->start, NULL);
- memcpy(&td->tv_cache, &td->start, sizeof(td->start));
-
- if (clear_state) {
- clear_io_state(td, 0);
-
- if (o->unlink_each_loop && unlink_all_files(td))
- break;
- }
-
- prune_io_piece_log(td);
-
- if (td->o.verify_only && td_write(td))
- verify_bytes = do_dry_run(td);
- else {
- do_io(td, bytes_done);
-
- if (!ddir_rw_sum(bytes_done)) {
- fio_mark_td_terminate(td);
- verify_bytes = 0;
- } else {
- verify_bytes = bytes_done[DDIR_WRITE] +
- bytes_done[DDIR_TRIM];
- }
- }
-
- /*
- * If we took too long to shut down, the main thread could
- * already consider us reaped/exited. If that happens, break
- * out and clean up.
- */
- if (td->runstate >= TD_EXITED)
- break;
-
- clear_state = 1;
-
- /*
- * Make sure we've successfully updated the rusage stats
- * before waiting on the stat mutex. Otherwise we could have
- * the stat thread holding stat mutex and waiting for
- * the rusage_sem, which would never get upped because
- * this thread is waiting for the stat mutex.
- */
- deadlock_loop_cnt = 0;
- do {
- check_update_rusage(td);
- if (!fio_mutex_down_trylock(stat_mutex))
- break;
- usleep(1000);
- if (deadlock_loop_cnt++ > 5000) {
- log_err("fio seems to be stuck grabbing stat_mutex, forcibly exiting\n");
- td->error = EDEADLK;
- goto err;
- }
- } while (1);
-
- if (td_read(td) && td->io_bytes[DDIR_READ])
- update_runtime(td, elapsed_us, DDIR_READ);
- if (td_write(td) && td->io_bytes[DDIR_WRITE])
- update_runtime(td, elapsed_us, DDIR_WRITE);
- if (td_trim(td) && td->io_bytes[DDIR_TRIM])
- update_runtime(td, elapsed_us, DDIR_TRIM);
- fio_gettime(&td->start, NULL);
- fio_mutex_up(stat_mutex);
-
- if (td->error || td->terminate)
- break;
-
- if (!o->do_verify ||
- o->verify == VERIFY_NONE ||
- td_ioengine_flagged(td, FIO_UNIDIR))
- continue;
-
- clear_io_state(td, 0);
-
- fio_gettime(&td->start, NULL);
-
- do_verify(td, verify_bytes);
-
- /*
- * See comment further up for why this is done here.
- */
- check_update_rusage(td);
-
- fio_mutex_down(stat_mutex);
- update_runtime(td, elapsed_us, DDIR_READ);
- fio_gettime(&td->start, NULL);
- fio_mutex_up(stat_mutex);
-
- if (td->error || td->terminate)
- break;
- }
-
- /*
- * If td ended up with no I/O when it should have had,
- * then something went wrong unless FIO_NOIO or FIO_DISKLESSIO.
- * (Are we not missing other flags that can be ignored ?)
- */
- if ((td->o.size || td->o.io_size) && !ddir_rw_sum(bytes_done) &&
- !(td_ioengine_flagged(td, FIO_NOIO) ||
- td_ioengine_flagged(td, FIO_DISKLESSIO)))
- log_err("%s: No I/O performed by %s, "
- "perhaps try --debug=io option for details?\n",
- td->o.name, td->io_ops->name);
-
- td_set_runstate(td, TD_FINISHING);
-
- update_rusage_stat(td);
- td->ts.total_run_time = mtime_since_now(&td->epoch);
- td->ts.io_bytes[DDIR_READ] = td->io_bytes[DDIR_READ];
- td->ts.io_bytes[DDIR_WRITE] = td->io_bytes[DDIR_WRITE];
- td->ts.io_bytes[DDIR_TRIM] = td->io_bytes[DDIR_TRIM];
-
- if (td->o.verify_state_save && !(td->flags & TD_F_VSTATE_SAVED) &&
- (td->o.verify != VERIFY_NONE && td_write(td)))
- verify_save_state(td->thread_number);
-
- fio_unpin_memory(td);
-
- td_writeout_logs(td, true);
-
- iolog_compress_exit(td);
- rate_submit_exit(td);
-
- if (o->exec_postrun)
- exec_string(o, o->exec_postrun, (const char *)"postrun");
-
- if (exitall_on_terminate || (o->exitall_error && td->error))
- fio_terminate_threads(td->groupid);
-
-err:
- if (td->error)
- log_info("fio: pid=%d, err=%d/%s\n", (int) td->pid, td->error,
- td->verror);
-
- if (o->verify_async)
- verify_async_exit(td);
-
- close_and_free_files(td);
- cleanup_io_u(td);
- close_ioengine(td);
- cgroup_shutdown(td, &cgroup_mnt);
- verify_free_state(td);
-
- if (td->zone_state_index) {
- int i;
-
- for (i = 0; i < DDIR_RWDIR_CNT; i++)
- free(td->zone_state_index[i]);
- free(td->zone_state_index);
- td->zone_state_index = NULL;
- }
-
- if (fio_option_is_set(o, cpumask)) {
- ret = fio_cpuset_exit(&o->cpumask);
- if (ret)
- td_verror(td, ret, "fio_cpuset_exit");
- }
-
- /*
- * do this very late, it will log file closing as well
- */
- if (o->write_iolog_file)
- write_iolog_close(td);
-
- td_set_runstate(td, TD_EXITED);
-
- /*
- * Do this last after setting our runstate to exited, so we
- * know that the stat thread is signaled.
- */
- check_update_rusage(td);
-
- sk_out_drop();
- return (void *) (uintptr_t) td->error;
-}
-
-/*
- * Run over the job map and reap the threads that have exited, if any.
- */
-static void reap_threads(unsigned int *nr_running, uint64_t *t_rate,
- uint64_t *m_rate)
-{
- struct thread_data *td;
- unsigned int cputhreads, realthreads, pending;
- int i, status, ret;
-
- /*
- * reap exited threads (TD_EXITED -> TD_REAPED)
- */
- realthreads = pending = cputhreads = 0;
- for_each_td(td, i) {
- int flags = 0;
-
- /*
- * ->io_ops is NULL for a thread that has closed its
- * io engine
- */
- if (td->io_ops && !strcmp(td->io_ops->name, "cpuio"))
- cputhreads++;
- else
- realthreads++;
-
- if (!td->pid) {
- pending++;
- continue;
- }
- if (td->runstate == TD_REAPED)
- continue;
- if (td->o.use_thread) {
- if (td->runstate == TD_EXITED) {
- td_set_runstate(td, TD_REAPED);
- goto reaped;
- }
- continue;
- }
-
- flags = WNOHANG;
- if (td->runstate == TD_EXITED)
- flags = 0;
-
- /*
- * check if someone quit or got killed in an unusual way
- */
- ret = waitpid(td->pid, &status, flags);
- if (ret < 0) {
- if (errno == ECHILD) {
- log_err("fio: pid=%d disappeared %d\n",
- (int) td->pid, td->runstate);
- td->sig = ECHILD;
- td_set_runstate(td, TD_REAPED);
- goto reaped;
- }
- perror("waitpid");
- } else if (ret == td->pid) {
- if (WIFSIGNALED(status)) {
- int sig = WTERMSIG(status);
-
- if (sig != SIGTERM && sig != SIGUSR2)
- log_err("fio: pid=%d, got signal=%d\n",
- (int) td->pid, sig);
- td->sig = sig;
- td_set_runstate(td, TD_REAPED);
- goto reaped;
- }
- if (WIFEXITED(status)) {
- if (WEXITSTATUS(status) && !td->error)
- td->error = WEXITSTATUS(status);
-
- td_set_runstate(td, TD_REAPED);
- goto reaped;
- }
- }
-
- /*
- * If the job is stuck, do a forceful timeout of it and
- * move on.
- */
- if (td->terminate &&
- td->runstate < TD_FSYNCING &&
- time_since_now(&td->terminate_time) >= FIO_REAP_TIMEOUT) {
- log_err("fio: job '%s' (state=%d) hasn't exited in "
- "%lu seconds, it appears to be stuck. Doing "
- "forceful exit of this job.\n",
- td->o.name, td->runstate,
- (unsigned long) time_since_now(&td->terminate_time));
- td_set_runstate(td, TD_REAPED);
- goto reaped;
- }
-
- /*
- * thread is not dead, continue
- */
- pending++;
- continue;
-reaped:
- (*nr_running)--;
- (*m_rate) -= ddir_rw_sum(td->o.ratemin);
- (*t_rate) -= ddir_rw_sum(td->o.rate);
- if (!td->pid)
- pending--;
-
- if (td->error)
- exit_value++;
-
- done_secs += mtime_since_now(&td->epoch) / 1000;
- profile_td_exit(td);
- }
-
- if (*nr_running == cputhreads && !pending && realthreads)
- fio_terminate_threads(TERMINATE_ALL);
-}
-
-static bool __check_trigger_file(void)
-{
- struct stat sb;
-
- if (!trigger_file)
- return false;
-
- if (stat(trigger_file, &sb))
- return false;
-
- if (unlink(trigger_file) < 0)
- log_err("fio: failed to unlink %s: %s\n", trigger_file,
- strerror(errno));
-
- return true;
-}
-
-static bool trigger_timedout(void)
-{
- if (trigger_timeout)
- return time_since_genesis() >= trigger_timeout;
-
- return false;
-}
-
-void exec_trigger(const char *cmd)
-{
- int ret;
-
- if (!cmd)
- return;
-
- ret = system(cmd);
- if (ret == -1)
- log_err("fio: failed executing %s trigger\n", cmd);
-}
-
-void check_trigger_file(void)
-{
- if (__check_trigger_file() || trigger_timedout()) {
- if (nr_clients)
- fio_clients_send_trigger(trigger_remote_cmd);
- else {
- verify_save_state(IO_LIST_ALL);
- fio_terminate_threads(TERMINATE_ALL);
- exec_trigger(trigger_cmd);
- }
- }
-}
-
-static int fio_verify_load_state(struct thread_data *td)
-{
- int ret;
-
- if (!td->o.verify_state)
- return 0;
-
- if (is_backend) {
- void *data;
-
- ret = fio_server_get_verify_state(td->o.name,
- td->thread_number - 1, &data);
- if (!ret)
- verify_assign_state(td, data);
- } else
- ret = verify_load_state(td, "local");
-
- return ret;
-}
-
-static void do_usleep(unsigned int usecs)
-{
- check_for_running_stats();
- check_trigger_file();
- usleep(usecs);
-}
-
-static bool check_mount_writes(struct thread_data *td)
-{
- struct fio_file *f;
- unsigned int i;
-
- if (!td_write(td) || td->o.allow_mounted_write)
- return false;
-
- /*
- * If FIO_HAVE_CHARDEV_SIZE is defined, it's likely that chrdevs
- * are mkfs'd and mounted.
- */
- for_each_file(td, f, i) {
-#ifdef FIO_HAVE_CHARDEV_SIZE
- if (f->filetype != FIO_TYPE_BLOCK && f->filetype != FIO_TYPE_CHAR)
-#else
- if (f->filetype != FIO_TYPE_BLOCK)
-#endif
- continue;
- if (device_is_mounted(f->file_name))
- goto mounted;
- }
-
- return false;
-mounted:
- log_err("fio: %s appears mounted, and 'allow_mounted_write' isn't set. Aborting.\n", f->file_name);
- return true;
-}
-
-static bool waitee_running(struct thread_data *me)
-{
- const char *waitee = me->o.wait_for;
- const char *self = me->o.name;
- struct thread_data *td;
- int i;
-
- if (!waitee)
- return false;
-
- for_each_td(td, i) {
- if (!strcmp(td->o.name, self) || strcmp(td->o.name, waitee))
- continue;
-
- if (td->runstate < TD_EXITED) {
- dprint(FD_PROCESS, "%s fenced by %s(%s)\n",
- self, td->o.name,
- runstate_to_name(td->runstate));
- return true;
- }
- }
-
- dprint(FD_PROCESS, "%s: %s completed, can run\n", self, waitee);
- return false;
-}
-
-/*
- * Main function for kicking off and reaping jobs, as needed.
- */
-static void run_threads(struct sk_out *sk_out)
-{
- struct thread_data *td;
- unsigned int i, todo, nr_running, nr_started;
- uint64_t m_rate, t_rate;
- uint64_t spent;
-
- if (fio_gtod_offload && fio_start_gtod_thread())
- return;
-
- fio_idle_prof_init();
-
- set_sig_handlers();
-
- nr_thread = nr_process = 0;
- for_each_td(td, i) {
- if (check_mount_writes(td))
- return;
- if (td->o.use_thread)
- nr_thread++;
- else
- nr_process++;
- }
-
- if (output_format & FIO_OUTPUT_NORMAL) {
- log_info("Starting ");
- if (nr_thread)
- log_info("%d thread%s", nr_thread,
- nr_thread > 1 ? "s" : "");
- if (nr_process) {
- if (nr_thread)
- log_info(" and ");
- log_info("%d process%s", nr_process,
- nr_process > 1 ? "es" : "");
- }
- log_info("\n");
- log_info_flush();
- }
-
- todo = thread_number;
- nr_running = 0;
- nr_started = 0;
- m_rate = t_rate = 0;
-
- for_each_td(td, i) {
- print_status_init(td->thread_number - 1);
-
- if (!td->o.create_serialize)
- continue;
-
- if (fio_verify_load_state(td))
- goto reap;
-
- /*
- * do file setup here so it happens sequentially,
- * we don't want X number of threads getting their
- * client data interspersed on disk
- */
- if (setup_files(td)) {
-reap:
- exit_value++;
- if (td->error)
- log_err("fio: pid=%d, err=%d/%s\n",
- (int) td->pid, td->error, td->verror);
- td_set_runstate(td, TD_REAPED);
- todo--;
- } else {
- struct fio_file *f;
- unsigned int j;
-
- /*
- * for sharing to work, each job must always open
- * its own files. so close them, if we opened them
- * for creation
- */
- for_each_file(td, f, j) {
- if (fio_file_open(f))
- td_io_close_file(td, f);
- }
- }
- }
-
- /* start idle threads before io threads start to run */
- fio_idle_prof_start();
-
- set_genesis_time();
-
- while (todo) {
- struct thread_data *map[REAL_MAX_JOBS];
- struct timeval this_start;
- int this_jobs = 0, left;
- struct fork_data *fd;
-
- /*
- * create threads (TD_NOT_CREATED -> TD_CREATED)
- */
- for_each_td(td, i) {
- if (td->runstate != TD_NOT_CREATED)
- continue;
-
- /*
- * never got a chance to start, killed by other
- * thread for some reason
- */
- if (td->terminate) {
- todo--;
- continue;
- }
-
- if (td->o.start_delay) {
- spent = utime_since_genesis();
-
- if (td->o.start_delay > spent)
- continue;
- }
-
- if (td->o.stonewall && (nr_started || nr_running)) {
- dprint(FD_PROCESS, "%s: stonewall wait\n",
- td->o.name);
- break;
- }
-
- if (waitee_running(td)) {
- dprint(FD_PROCESS, "%s: waiting for %s\n",
- td->o.name, td->o.wait_for);
- continue;
- }
-
- init_disk_util(td);
-
- td->rusage_sem = fio_mutex_init(FIO_MUTEX_LOCKED);
- td->update_rusage = 0;
-
- /*
- * Set state to created. Thread will transition
- * to TD_INITIALIZED when it's done setting up.
- */
- td_set_runstate(td, TD_CREATED);
- map[this_jobs++] = td;
- nr_started++;
-
- fd = calloc(1, sizeof(*fd));
- fd->td = td;
- fd->sk_out = sk_out;
-
- if (td->o.use_thread) {
- int ret;
-
- dprint(FD_PROCESS, "will pthread_create\n");
- ret = pthread_create(&td->thread, NULL,
- thread_main, fd);
- if (ret) {
- log_err("pthread_create: %s\n",
- strerror(ret));
- free(fd);
- nr_started--;
- break;
- }
- ret = pthread_detach(td->thread);
- if (ret)
- log_err("pthread_detach: %s",
- strerror(ret));
- } else {
- pid_t pid;
- dprint(FD_PROCESS, "will fork\n");
- pid = fork();
- if (!pid) {
- int ret;
-
- ret = (int)(uintptr_t)thread_main(fd);
- _exit(ret);
- } else if (i == fio_debug_jobno)
- *fio_debug_jobp = pid;
- }
- dprint(FD_MUTEX, "wait on startup_mutex\n");
- if (fio_mutex_down_timeout(startup_mutex, 10000)) {
- log_err("fio: job startup hung? exiting.\n");
- fio_terminate_threads(TERMINATE_ALL);
- fio_abort = 1;
- nr_started--;
- break;
- }
- dprint(FD_MUTEX, "done waiting on startup_mutex\n");
- }
-
- /*
- * Wait for the started threads to transition to
- * TD_INITIALIZED.
- */
- fio_gettime(&this_start, NULL);
- left = this_jobs;
- while (left && !fio_abort) {
- if (mtime_since_now(&this_start) > JOB_START_TIMEOUT)
- break;
-
- do_usleep(100000);
-
- for (i = 0; i < this_jobs; i++) {
- td = map[i];
- if (!td)
- continue;
- if (td->runstate == TD_INITIALIZED) {
- map[i] = NULL;
- left--;
- } else if (td->runstate >= TD_EXITED) {
- map[i] = NULL;
- left--;
- todo--;
- nr_running++; /* work-around... */
- }
- }
- }
-
- if (left) {
- log_err("fio: %d job%s failed to start\n", left,
- left > 1 ? "s" : "");
- for (i = 0; i < this_jobs; i++) {
- td = map[i];
- if (!td)
- continue;
- kill(td->pid, SIGTERM);
- }
- break;
- }
-
- /*
- * start created threads (TD_INITIALIZED -> TD_RUNNING).
- */
- for_each_td(td, i) {
- if (td->runstate != TD_INITIALIZED)
- continue;
-
- if (in_ramp_time(td))
- td_set_runstate(td, TD_RAMP);
- else
- td_set_runstate(td, TD_RUNNING);
- nr_running++;
- nr_started--;
- m_rate += ddir_rw_sum(td->o.ratemin);
- t_rate += ddir_rw_sum(td->o.rate);
- todo--;
- fio_mutex_up(td->mutex);
- }
-
- reap_threads(&nr_running, &t_rate, &m_rate);
-
- if (todo)
- do_usleep(100000);
- }
-
- while (nr_running) {
- reap_threads(&nr_running, &t_rate, &m_rate);
- do_usleep(10000);
- }
-
- fio_idle_prof_stop();
-
- update_io_ticks();
-}
-
-static void free_disk_util(void)
-{
- disk_util_prune_entries();
- helper_thread_destroy();
-}
-
-int fio_backend(struct sk_out *sk_out)
-{
- struct thread_data *td;
- int i;
-
- if (exec_profile) {
- if (load_profile(exec_profile))
- return 1;
- free(exec_profile);
- exec_profile = NULL;
- }
- if (!thread_number)
- return 0;
-
- if (write_bw_log) {
- struct log_params p = {
- .log_type = IO_LOG_TYPE_BW,
- };
-
- setup_log(&agg_io_log[DDIR_READ], &p, "agg-read_bw.log");
- setup_log(&agg_io_log[DDIR_WRITE], &p, "agg-write_bw.log");
- setup_log(&agg_io_log[DDIR_TRIM], &p, "agg-trim_bw.log");
- }
-
- startup_mutex = fio_mutex_init(FIO_MUTEX_LOCKED);
- if (startup_mutex == NULL)
- return 1;
-
- set_genesis_time();
- stat_init();
- helper_thread_create(startup_mutex, sk_out);
-
- cgroup_list = smalloc(sizeof(*cgroup_list));
- INIT_FLIST_HEAD(cgroup_list);
-
- run_threads(sk_out);
-
- helper_thread_exit();
-
- if (!fio_abort) {
- __show_run_stats();
- if (write_bw_log) {
- for (i = 0; i < DDIR_RWDIR_CNT; i++) {
- struct io_log *log = agg_io_log[i];
-
- flush_log(log, false);
- free_log(log);
- }
- }
- }
-
- for_each_td(td, i) {
- if (td->ss.dur) {
- if (td->ss.iops_data != NULL) {
- free(td->ss.iops_data);
- free(td->ss.bw_data);
- }
- }
- fio_options_free(td);
- if (td->rusage_sem) {
- fio_mutex_remove(td->rusage_sem);
- td->rusage_sem = NULL;
- }
- fio_mutex_remove(td->mutex);
- td->mutex = NULL;
- }
-
- free_disk_util();
- cgroup_kill(cgroup_list);
- sfree(cgroup_list);
- sfree(cgroup_mnt);
-
- fio_mutex_remove(startup_mutex);
- stat_exit();
- return exit_value;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-26 15:41:35 +0000