Example #1
0
File: io_u.c Project: vsharma13/fio
static enum fio_ddir rate_ddir(struct thread_data *td, enum fio_ddir ddir)
{
	enum fio_ddir odir = ddir ^ 1;
	struct timeval t;
	long usec;

	assert(ddir_rw(ddir));

	if (td->rate_pending_usleep[ddir] <= 0)
		return ddir;

	/*
	 * We have too much pending sleep in this direction. See if we
	 * should switch.
	 */
	if (td_rw(td) && td->o.rwmix[odir]) {
		/*
		 * Other direction does not have too much pending, switch
		 */
		if (td->rate_pending_usleep[odir] < 100000)
			return odir;

		/*
		 * Both directions have pending sleep. Sleep the minimum time
		 * and deduct from both.
		 */
		if (td->rate_pending_usleep[ddir] <=
			td->rate_pending_usleep[odir]) {
			usec = td->rate_pending_usleep[ddir];
		} else {
			usec = td->rate_pending_usleep[odir];
			ddir = odir;
		}
	} else
		usec = td->rate_pending_usleep[ddir];

	io_u_quiesce(td);

	fio_gettime(&t, NULL);
	usec_sleep(td, usec);
	usec = utime_since_now(&t);

	td->rate_pending_usleep[ddir] -= usec;

	odir = ddir ^ 1;
	if (td_rw(td) && __should_check_rate(td, odir))
		td->rate_pending_usleep[odir] -= usec;

	if (ddir_trim(ddir))
		return ddir;

	return ddir;
}
Example #2
0
static enum fio_ddir rate_ddir(struct thread_data *td, enum fio_ddir ddir)
{
	enum fio_ddir odir = ddir ^ 1;
	struct timeval t;
	long usec;

	assert(ddir_rw(ddir));

	if (td->rate_pending_usleep[ddir] <= 0)
		return ddir;

	/*
	 * We have too much pending sleep in this direction. See if we
	 * should switch.
	 */
	if (td_rw(td)) {
		/*
		 * Other direction does not have too much pending, switch
		 */
		if (td->rate_pending_usleep[odir] < 100000)
			return odir;

		/*
		 * Both directions have pending sleep. Sleep the minimum time
		 * and deduct from both.
		 */
		if (td->rate_pending_usleep[ddir] <=
			td->rate_pending_usleep[odir]) {
			usec = td->rate_pending_usleep[ddir];
		} else {
			usec = td->rate_pending_usleep[odir];
			ddir = odir;
		}
	} else
		usec = td->rate_pending_usleep[ddir];

	/*
	 * We are going to sleep, ensure that we flush anything pending as
	 * not to skew our latency numbers.
	 *
	 * Changed to only monitor 'in flight' requests here instead of the
	 * td->cur_depth, b/c td->cur_depth does not accurately represent
	 * io's that have been actually submitted to an async engine,
	 * and cur_depth is meaningless for sync engines.
	 */
	if (td->io_u_in_flight) {
		int fio_unused ret;

		ret = io_u_queued_complete(td, td->io_u_in_flight, NULL);
	}

	fio_gettime(&t, NULL);
	usec_sleep(td, usec);
	usec = utime_since_now(&t);

	td->rate_pending_usleep[ddir] -= usec;

	odir = ddir ^ 1;
	if (td_rw(td) && __should_check_rate(td, odir))
		td->rate_pending_usleep[odir] -= usec;

	if (ddir_trim(ddir))
		return ddir;
	return ddir;
}
Example #3
0
File: io_u.c Project: vsharma13/fio
static void io_completed(struct thread_data *td, struct io_u *io_u,
			 struct io_completion_data *icd)
{
	struct fio_file *f;

	dprint_io_u(io_u, "io complete");

	td_io_u_lock(td);
	assert(io_u->flags & IO_U_F_FLIGHT);
	io_u->flags &= ~(IO_U_F_FLIGHT | IO_U_F_BUSY_OK);

	/*
	 * Mark IO ok to verify
	 */
	if (io_u->ipo) {
		io_u->ipo->flags &= ~IP_F_IN_FLIGHT;
		write_barrier();
	}

	td_io_u_unlock(td);

	if (ddir_sync(io_u->ddir)) {
		td->last_was_sync = 1;
		f = io_u->file;
		if (f) {
			f->first_write = -1ULL;
			f->last_write = -1ULL;
		}
		return;
	}

	td->last_was_sync = 0;
	td->last_ddir = io_u->ddir;

	if (!io_u->error && ddir_rw(io_u->ddir)) {
		unsigned int bytes = io_u->buflen - io_u->resid;
		const enum fio_ddir idx = io_u->ddir;
		const enum fio_ddir odx = io_u->ddir ^ 1;
		int ret;

		td->io_blocks[idx]++;
		td->this_io_blocks[idx]++;
		td->io_bytes[idx] += bytes;

		if (!(io_u->flags & IO_U_F_VER_LIST))
			td->this_io_bytes[idx] += bytes;

		if (idx == DDIR_WRITE) {
			f = io_u->file;
			if (f) {
				if (f->first_write == -1ULL ||
				    io_u->offset < f->first_write)
					f->first_write = io_u->offset;
				if (f->last_write == -1ULL ||
				    ((io_u->offset + bytes) > f->last_write))
					f->last_write = io_u->offset + bytes;
			}
		}

		if (ramp_time_over(td) && (td->runstate == TD_RUNNING ||
					   td->runstate == TD_VERIFYING)) {
			account_io_completion(td, io_u, icd, idx, bytes);

			if (__should_check_rate(td, idx)) {
				td->rate_pending_usleep[idx] =
					(usec_for_io(td, idx) -
					 utime_since_now(&td->start));
			}
			if (idx != DDIR_TRIM && __should_check_rate(td, odx))
				td->rate_pending_usleep[odx] =
					(usec_for_io(td, odx) -
					 utime_since_now(&td->start));
		}

		icd->bytes_done[idx] += bytes;

		if (io_u->end_io) {
			ret = io_u->end_io(td, io_u);
			if (ret && !icd->error)
				icd->error = ret;
		}
	} else if (io_u->error) {
		icd->error = io_u->error;
		io_u_log_error(td, io_u);
	}
	if (icd->error) {
		enum error_type_bit eb = td_error_type(io_u->ddir, icd->error);
		if (!td_non_fatal_error(td, eb, icd->error))
			return;
		/*
		 * If there is a non_fatal error, then add to the error count
		 * and clear all the errors.
		 */
		update_error_count(td, icd->error);
		td_clear_error(td);
		icd->error = 0;
		io_u->error = 0;
	}
}
Example #4
0
File: io_u.c Project: hanhua/fio
static void io_completed(struct thread_data *td, struct io_u *io_u,
			 struct io_completion_data *icd)
{
	struct fio_file *f;

	dprint_io_u(io_u, "io complete");

	td_io_u_lock(td);
	assert(io_u->flags & IO_U_F_FLIGHT);
	io_u->flags &= ~(IO_U_F_FLIGHT | IO_U_F_BUSY_OK);
	td_io_u_unlock(td);

	if (ddir_sync(io_u->ddir)) {
		td->last_was_sync = 1;
		f = io_u->file;
		if (f) {
			f->first_write = -1ULL;
			f->last_write = -1ULL;
		}
		return;
	}

	td->last_was_sync = 0;
	td->last_ddir = io_u->ddir;

	if (!io_u->error && ddir_rw(io_u->ddir)) {
		unsigned int bytes = io_u->buflen - io_u->resid;
		const enum fio_ddir idx = io_u->ddir;
		const enum fio_ddir odx = io_u->ddir ^ 1;
		int ret;

		td->io_blocks[idx]++;
		td->this_io_blocks[idx]++;
		td->io_bytes[idx] += bytes;

		if (!(io_u->flags & IO_U_F_VER_LIST))
			td->this_io_bytes[idx] += bytes;

		if (idx == DDIR_WRITE) {
			f = io_u->file;
			if (f) {
				if (f->first_write == -1ULL ||
				    io_u->offset < f->first_write)
					f->first_write = io_u->offset;
				if (f->last_write == -1ULL ||
				    ((io_u->offset + bytes) > f->last_write))
					f->last_write = io_u->offset + bytes;
			}
		}

		if (ramp_time_over(td) && (td->runstate == TD_RUNNING ||
					   td->runstate == TD_VERIFYING)) {
			account_io_completion(td, io_u, icd, idx, bytes);

			if (__should_check_rate(td, idx)) {
				td->rate_pending_usleep[idx] =
					(usec_for_io(td, idx) -
					 utime_since_now(&td->start));
			}

			if (__should_check_latency(td, idx)) {
				unsigned long lusec = utime_since(
					&io_u->issue_time, &icd->time);
				/* Linear increase and logarithmic decrease */
				if (lusec > td->o.shed_latency[idx]) {
					if (td->shed_count[idx] < MAX_SHED_COUNT ) {
						td->shed_count[idx] += (1<<SHED_FRAC_BITS);
					}
				}
				else if (td->shed_count[idx]) {
					td->shed_count[idx] -= get_used_bits(td->shed_count[idx]);
				}
				if (td->shed_count[idx]) {
					lusec = (lusec * td->shed_count[idx]) >> SHED_FRAC_BITS;
					if (lusec > td->rate_pending_usleep[idx]) {
						td->rate_pending_usleep[idx] = lusec;
					}
				}
			}