X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=init.c;h=07daaa84b17c6318727846e9634919c328fe6a07;hp=e53be35a7bed07ab0ff4ed06e2e7d564585793f8;hb=ef37053efdfb8c3b8b6deef43c0969753e6adb44;hpb=14060ebb90ce5a0a164d0e5e52c13e31b53b282d

diff --git a/init.c b/init.c
index e53be35a..07daaa84 100644
--- a/init.c
+++ b/init.c
@@ -45,13 +45,12 @@ const char fio_version_string[] = FIO_VERSION;
 #define FIO_RANDSEED		(0xb1899bedUL)
 
 static char **ini_file;
-static int max_jobs = FIO_MAX_JOBS;
 static bool dump_cmdline;
 static bool parse_only;
 static bool merge_blktrace_only;
 
 static struct thread_data def_thread;
-struct thread_data *threads = NULL;
+struct thread_segment segments[REAL_MAX_SEG];
 static char **job_sections;
 static int nr_job_sections;
 
@@ -301,25 +300,35 @@ static struct option l_opts[FIO_NR_OPTIONS] = {
 
 void free_threads_shm(void)
 {
-	if (threads) {
-		void *tp = threads;
+	int i;
+
+	for (i = 0; i < nr_segments; i++) {
+		struct thread_segment *seg = &segments[i];
+
+		if (seg->threads) {
+			void *tp = seg->threads;
 #ifndef CONFIG_NO_SHM
-		struct shmid_ds sbuf;
+			struct shmid_ds sbuf;
 
-		threads = NULL;
-		shmdt(tp);
-		shmctl(shm_id, IPC_RMID, &sbuf);
-		shm_id = -1;
+			seg->threads = NULL;
+			shmdt(tp);
+			shmctl(seg->shm_id, IPC_RMID, &sbuf);
+			seg->shm_id = -1;
 #else
-		threads = NULL;
-		free(tp);
+			seg->threads = NULL;
+			free(tp);
 #endif
+		}
 	}
+
+	nr_segments = 0;
+	cur_segment = 0;
 }
 
 static void free_shm(void)
 {
-	if (threads) {
+#ifndef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
+	if (nr_segments) {
 		flow_exit();
 		fio_debug_jobp = NULL;
 		fio_warned = NULL;
@@ -335,73 +344,82 @@ static void free_shm(void)
 	fio_filelock_exit();
 	file_hash_exit();
 	scleanup();
+#endif
 }
 
-/*
- * 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)
+static int add_thread_segment(void)
 {
+	struct thread_segment *seg = &segments[nr_segments];
+	size_t size = JOBS_PER_SEG * sizeof(struct thread_data);
 	int i;
 
-	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);
+	if (nr_segments + 1 >= REAL_MAX_SEG) {
+		log_err("error: maximum number of jobs reached.\n");
+		return -1;
+	}
 
-		size += 2 * sizeof(unsigned int);
+	size += 2 * 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) {
+	seg->shm_id = shmget(0, size, IPC_CREAT | 0600);
+	if (seg->shm_id == -1) {
+		if (errno != EINVAL && errno != ENOMEM && errno != ENOSPC)
 			perror("shmget");
-			break;
-		}
+		return -1;
+	}
 #else
-		threads = malloc(size);
-		if (threads)
-			break;
+	seg->threads = malloc(size);
+	if (!seg->threads)
+		return -1;
 #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) {
+	seg->threads = shmat(seg->shm_id, NULL, 0);
+	if (seg->threads == (void *) -1) {
 		perror("shmat");
 		return 1;
 	}
 	if (shm_attach_to_open_removed())
-		shmctl(shm_id, IPC_RMID, NULL);
+		shmctl(seg->shm_id, IPC_RMID, NULL);
 #endif
 
-	memset(threads, 0, max_jobs * sizeof(struct thread_data));
-	for (i = 0; i < max_jobs; i++)
-		DRD_IGNORE_VAR(threads[i]);
-	fio_debug_jobp = (unsigned int *)(threads + max_jobs);
+	nr_segments++;
+
+	memset(seg->threads, 0, JOBS_PER_SEG * sizeof(struct thread_data));
+	for (i = 0; i < JOBS_PER_SEG; i++)
+		DRD_IGNORE_VAR(seg->threads[i]);
+	seg->nr_threads = 0;
+
+	/* Not first segment, we're done */
+	if (nr_segments != 1) {
+		cur_segment++;
+		return 0;
+	}
+
+	fio_debug_jobp = (unsigned int *)(seg->threads + JOBS_PER_SEG);
 	*fio_debug_jobp = -1;
 	fio_warned = fio_debug_jobp + 1;
 	*fio_warned = 0;
 
 	flow_init();
-
 	return 0;
 }
 
+/*
+ * The thread areas are shared between the main process and the job
+ * threads/processes, and is split into chunks of JOBS_PER_SEG. If the current
+ * segment has no more room, add a new chunk.
+ */
+static int expand_thread_area(void)
+{
+	struct thread_segment *seg = &segments[cur_segment];
+
+	if (nr_segments && seg->nr_threads < JOBS_PER_SEG)
+		return 0;
+
+	return add_thread_segment();
+}
+
 static void dump_print_option(struct print_option *p)
 {
 	const char *delim;
@@ -430,19 +448,6 @@ static void dump_opt_list(struct thread_data *td)
 	}
 }
 
-static void fio_dump_options_free(struct thread_data *td)
-{
-	while (!flist_empty(&td->opt_list)) {
-		struct print_option *p;
-
-		p = flist_first_entry(&td->opt_list, struct print_option, list);
-		flist_del_init(&p->list);
-		free(p->name);
-		free(p->value);
-		free(p);
-	}
-}
-
 static void copy_opt_list(struct thread_data *dst, struct thread_data *src)
 {
 	struct flist_head *entry;
@@ -470,21 +475,19 @@ static void copy_opt_list(struct thread_data *dst, struct thread_data *src)
 static struct thread_data *get_new_job(bool global, struct thread_data *parent,
 				       bool preserve_eo, const char *jobname)
 {
+	struct thread_segment *seg;
 	struct thread_data *td;
 
 	if (global)
 		return &def_thread;
-	if (setup_thread_area()) {
+	if (expand_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++];
+	seg = &segments[cur_segment];
+	td = &seg->threads[seg->nr_threads++];
+	thread_number++;
 	*td = *parent;
 
 	INIT_FLIST_HEAD(&td->opt_list);
@@ -534,7 +537,8 @@ static void put_job(struct thread_data *td)
 	if (td->o.name)
 		free(td->o.name);
 
-	memset(&threads[td->thread_number - 1], 0, sizeof(*td));
+	memset(td, 0, sizeof(*td));
+	segments[cur_segment].nr_threads--;
 	thread_number--;
 }
 
@@ -564,13 +568,11 @@ 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);
-
+	for_each_rw_ddir(ddir) {
+		if (td->o.rate[ddir] || td->o.rate_iops[ddir]) {
+			ret |= __setup_rate(td, ddir);
+		}
+	}
 	return ret;
 }
 
@@ -631,6 +633,11 @@ static int fixup_options(struct thread_data *td)
 		ret |= 1;
 	}
 
+	if (o->zone_mode == ZONE_MODE_ZBD && !o->create_serialize) {
+		log_err("fio: --zonemode=zbd and --create_serialize=0 are not compatible.\n");
+		ret |= 1;
+	}
+
 	if (o->zone_mode == ZONE_MODE_STRIDED && !o->zone_size) {
 		log_err("fio: --zonesize must be specified when using --zonemode=strided.\n");
 		ret |= 1;
@@ -662,31 +669,25 @@ static int fixup_options(struct thread_data *td)
 	if (td_read(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_each_rw_ddir(ddir) {
+		if (!o->min_bs[ddir])
+			o->min_bs[ddir] = o->bs[ddir];
+		if (!o->max_bs[ddir])
+			o->max_bs[ddir] = o->bs[ddir];
+	}
+
+	o->rw_min_bs = -1;
+	for_each_rw_ddir(ddir) {
+		o->rw_min_bs = min(o->rw_min_bs, o->min_bs[ddir]);
+	}
 
 	/*
 	 * 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];
+	for_each_rw_ddir(ddir) {
+		if (!o->ba[ddir] || !td_random(td))
+			o->ba[ddir] = o->min_bs[ddir];
+	}
 
 	if ((o->ba[DDIR_READ] != o->min_bs[DDIR_READ] ||
 	    o->ba[DDIR_WRITE] != o->min_bs[DDIR_WRITE] ||
@@ -765,14 +766,12 @@ static int fixup_options(struct thread_data *td)
 		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;
+	for_each_rw_ddir(ddir) {
+		if ((o->rate[ddir] && (o->rate[ddir] < o->ratemin[ddir])) ||
+		    (o->rate_iops[ddir] && (o->rate_iops[ddir] < o->rate_iops_min[ddir]))) {
+			log_err("fio: minimum rate exceeds rate, ddir %d\n", +ddir);
+			ret |= 1;
+		}
 	}
 
 	if (!o->timeout && o->time_based) {
@@ -954,9 +953,33 @@ static int fixup_options(struct thread_data *td)
 	/*
 	 * Fix these up to be nsec internally
 	 */
-	o->max_latency *= 1000ULL;
+	for_each_rw_ddir(ddir)
+		o->max_latency[ddir] *= 1000ULL;
+
 	o->latency_target *= 1000ULL;
 
+	/*
+	 * Dedupe working set verifications
+	 */
+	if (o->dedupe_percentage && o->dedupe_mode == DEDUPE_MODE_WORKING_SET) {
+		if (!fio_option_is_set(o, size)) {
+			log_err("fio: pregenerated dedupe working set "
+					"requires size to be set\n");
+			ret |= 1;
+		} else if (o->nr_files != 1) {
+			log_err("fio: dedupe working set mode supported with "
+					"single file per job, but %d files "
+					"provided\n", o->nr_files);
+			ret |= 1;
+		} else if (o->dedupe_working_set_percentage + o->dedupe_percentage > 100) {
+			log_err("fio: impossible to reach expected dedupe percentage %u "
+					"since %u percentage of size is reserved to dedupe working set "
+					"(those are unique pages)\n",
+					o->dedupe_percentage, o->dedupe_working_set_percentage);
+			ret |= 1;
+		}
+	}
+
 	return ret;
 }
 
@@ -966,13 +989,13 @@ static void init_rand_file_service(struct thread_data *td)
 	const unsigned int seed = td->rand_seeds[FIO_RAND_FILE_OFF];
 
 	if (td->o.file_service_type == FIO_FSERVICE_ZIPF) {
-		zipf_init(&td->next_file_zipf, nranges, td->zipf_theta, seed);
+		zipf_init(&td->next_file_zipf, nranges, td->zipf_theta, td->random_center, seed);
 		zipf_disable_hash(&td->next_file_zipf);
 	} else if (td->o.file_service_type == FIO_FSERVICE_PARETO) {
-		pareto_init(&td->next_file_zipf, nranges, td->pareto_h, seed);
+		pareto_init(&td->next_file_zipf, nranges, td->pareto_h, td->random_center, seed);
 		zipf_disable_hash(&td->next_file_zipf);
 	} else if (td->o.file_service_type == FIO_FSERVICE_GAUSS) {
-		gauss_init(&td->next_file_gauss, nranges, td->gauss_dev, seed);
+		gauss_init(&td->next_file_gauss, nranges, td->gauss_dev, td->random_center, seed);
 		gauss_disable_hash(&td->next_file_gauss);
 	}
 }
@@ -1030,6 +1053,7 @@ static void td_fill_rand_seeds_internal(struct thread_data *td, bool use64)
 	init_rand_seed(&td->dedupe_state, td->rand_seeds[FIO_DEDUPE_OFF], false);
 	init_rand_seed(&td->zone_state, td->rand_seeds[FIO_RAND_ZONE_OFF], false);
 	init_rand_seed(&td->prio_state, td->rand_seeds[FIO_RAND_PRIO_CMDS], false);
+	init_rand_seed(&td->dedupe_working_set_index_state, td->rand_seeds[FIO_RAND_DEDUPE_WORKING_SET_IX], use64);
 
 	if (!td_random(td))
 		return;
@@ -1097,15 +1121,15 @@ int ioengine_load(struct thread_data *td)
 		 * for this name and see if they match. If they do, then
 		 * the engine is unchanged.
 		 */
-		dlhandle = td->io_ops_dlhandle;
+		dlhandle = td->io_ops->dlhandle;
 		ops = load_ioengine(td);
-		if (ops == td->io_ops && dlhandle == td->io_ops_dlhandle) {
-			if (dlhandle)
-				dlclose(dlhandle);
+		if (!ops)
+			goto fail;
+
+		if (ops == td->io_ops && dlhandle == td->io_ops->dlhandle)
 			return 0;
-		}
 
-		if (dlhandle && dlhandle != td->io_ops_dlhandle)
+		if (dlhandle && dlhandle != td->io_ops->dlhandle)
 			dlclose(dlhandle);
 
 		/* Unload the old engine. */
@@ -1113,10 +1137,8 @@ int ioengine_load(struct thread_data *td)
 	}
 
 	td->io_ops = load_ioengine(td);
-	if (!td->io_ops) {
-		log_err("fio: failed to load engine\n");
-		return 1;
-	}
+	if (!td->io_ops)
+		goto fail;
 
 	if (td->io_ops->option_struct_size && td->io_ops->options) {
 		/*
@@ -1155,6 +1177,11 @@ int ioengine_load(struct thread_data *td)
 
 	td_set_ioengine_flags(td);
 	return 0;
+
+fail:
+	log_err("fio: failed to load engine\n");
+	return 1;
+
 }
 
 static void init_flags(struct thread_data *td)
@@ -1228,7 +1255,8 @@ enum {
 	FPRE_NONE = 0,
 	FPRE_JOBNAME,
 	FPRE_JOBNUM,
-	FPRE_FILENUM
+	FPRE_FILENUM,
+	FPRE_CLIENTUID
 };
 
 static struct fpre_keyword {
@@ -1239,6 +1267,7 @@ static struct fpre_keyword {
 	{ .keyword = "$jobname",	.key = FPRE_JOBNAME, },
 	{ .keyword = "$jobnum",		.key = FPRE_JOBNUM, },
 	{ .keyword = "$filenum",	.key = FPRE_FILENUM, },
+	{ .keyword = "$clientuid",	.key = FPRE_CLIENTUID, },
 	{ .keyword = NULL, },
 	};
 
@@ -1328,6 +1357,21 @@ static char *make_filename(char *buf, size_t buf_size,struct thread_options *o,
 				}
 				break;
 				}
+			case FPRE_CLIENTUID: {
+				int ret;
+				ret = snprintf(dst, dst_left, "%s", client_sockaddr_str);
+				if (ret < 0)
+					break;
+				else if (ret > dst_left) {
+					log_err("fio: truncated filename\n");
+					dst += dst_left;
+					dst_left = 0;
+				} else {
+					dst += ret;
+					dst_left -= ret;
+				}
+				break;
+				}
 			default:
 				assert(0);
 				break;
@@ -1470,6 +1514,9 @@ static int add_job(struct thread_data *td, const char *jobname, int job_add_num,
 	if (fixup_options(td))
 		goto err;
 
+	if (init_dedupe_working_set_seeds(td))
+		goto err;
+
 	/*
 	 * Belongs to fixup_options, but o->name is not necessarily set as yet
 	 */
@@ -1501,16 +1548,7 @@ static int add_job(struct thread_data *td, const char *jobname, int job_add_num,
 	memcpy(td->ts.percentile_list, o->percentile_list, sizeof(o->percentile_list));
 	td->ts.sig_figs = o->sig_figs;
 
-	for (i = 0; i < DDIR_RWDIR_CNT; i++) {
-		td->ts.clat_stat[i].min_val = ULONG_MAX;
-		td->ts.slat_stat[i].min_val = ULONG_MAX;
-		td->ts.lat_stat[i].min_val = ULONG_MAX;
-		td->ts.bw_stat[i].min_val = ULONG_MAX;
-		td->ts.iops_stat[i].min_val = ULONG_MAX;
-		td->ts.clat_high_prio_stat[i].min_val = ULONG_MAX;
-		td->ts.clat_low_prio_stat[i].min_val = ULONG_MAX;
-	}
-	td->ts.sync_stat.min_val = ULONG_MAX;
+	init_thread_stat_min_vals(&td->ts);
 	td->ddir_seq_nr = o->ddir_seq_nr;
 
 	if ((o->stonewall || o->new_group) && prev_group_jobs) {
@@ -1536,6 +1574,7 @@ static int add_job(struct thread_data *td, const char *jobname, int job_add_num,
 			.hist_coarseness = o->log_hist_coarseness,
 			.log_type = IO_LOG_TYPE_LAT,
 			.log_offset = o->log_offset,
+			.log_prio = o->log_prio,
 			.log_gz = o->log_gz,
 			.log_gz_store = o->log_gz_store,
 		};
@@ -1547,17 +1586,23 @@ static int add_job(struct thread_data *td, const char *jobname, int job_add_num,
 		else
 			suf = "log";
 
-		gen_log_name(logname, sizeof(logname), "lat", pre,
-				td->thread_number, suf, o->per_job_logs);
-		setup_log(&td->lat_log, &p, logname);
+		if (!o->disable_lat) {
+			gen_log_name(logname, sizeof(logname), "lat", pre,
+				     td->thread_number, suf, o->per_job_logs);
+			setup_log(&td->lat_log, &p, logname);
+		}
 
-		gen_log_name(logname, sizeof(logname), "slat", pre,
-				td->thread_number, suf, o->per_job_logs);
-		setup_log(&td->slat_log, &p, logname);
+		if (!o->disable_slat) {
+			gen_log_name(logname, sizeof(logname), "slat", pre,
+				     td->thread_number, suf, o->per_job_logs);
+			setup_log(&td->slat_log, &p, logname);
+		}
 
-		gen_log_name(logname, sizeof(logname), "clat", pre,
-				td->thread_number, suf, o->per_job_logs);
-		setup_log(&td->clat_log, &p, logname);
+		if (!o->disable_clat) {
+			gen_log_name(logname, sizeof(logname), "clat", pre,
+				     td->thread_number, suf, o->per_job_logs);
+			setup_log(&td->clat_log, &p, logname);
+		}
 
 	}
 
@@ -1569,6 +1614,7 @@ static int add_job(struct thread_data *td, const char *jobname, int job_add_num,
 			.hist_coarseness = o->log_hist_coarseness,
 			.log_type = IO_LOG_TYPE_HIST,
 			.log_offset = o->log_offset,
+			.log_prio = o->log_prio,
 			.log_gz = o->log_gz,
 			.log_gz_store = o->log_gz_store,
 		};
@@ -1600,6 +1646,7 @@ static int add_job(struct thread_data *td, const char *jobname, int job_add_num,
 			.hist_coarseness = o->log_hist_coarseness,
 			.log_type = IO_LOG_TYPE_BW,
 			.log_offset = o->log_offset,
+			.log_prio = o->log_prio,
 			.log_gz = o->log_gz,
 			.log_gz_store = o->log_gz_store,
 		};
@@ -1631,6 +1678,7 @@ static int add_job(struct thread_data *td, const char *jobname, int job_add_num,
 			.hist_coarseness = o->log_hist_coarseness,
 			.log_type = IO_LOG_TYPE_IOPS,
 			.log_offset = o->log_offset,
+			.log_prio = o->log_prio,
 			.log_gz = o->log_gz,
 			.log_gz_store = o->log_gz_store,
 		};
@@ -1739,11 +1787,8 @@ static int add_job(struct thread_data *td, const char *jobname, int job_add_num,
 		if (file_alloced) {
 			if (td_new->files) {
 				struct fio_file *f;
-				for_each_file(td_new, f, i) {
-					if (f->file_name)
-						sfree(f->file_name);
-					sfree(f);
-				}
+				for_each_file(td_new, f, i)
+					fio_file_free(f);
 				free(td_new->files);
 				td_new->files = NULL;
 			}
@@ -1842,6 +1887,7 @@ static int __parse_jobs_ini(struct thread_data *td,
 		int nested, char *name, char ***popts, int *aopts, int *nopts)
 {
 	bool global = false;
+	bool stdin_occupied = false;
 	char *string;
 	FILE *f;
 	char *p;
@@ -1858,9 +1904,10 @@ static int __parse_jobs_ini(struct thread_data *td,
 	if (is_buf)
 		f = NULL;
 	else {
-		if (!strcmp(file, "-"))
+		if (!strcmp(file, "-")) {
 			f = stdin;
-		else
+			stdin_occupied = true;
+		} else
 			f = fopen(file, "r");
 
 		if (!f) {
@@ -2062,6 +2109,20 @@ static int __parse_jobs_ini(struct thread_data *td,
 		}
 
 		ret = fio_options_parse(td, opts, num_opts);
+
+		if (!ret && td->o.read_iolog_file != NULL) {
+			char *fname = get_name_by_idx(td->o.read_iolog_file,
+						      td->subjob_number);
+			if (!strcmp(fname, "-")) {
+				if (stdin_occupied) {
+					log_err("fio: only one user (read_iolog_file/job "
+						"file) of stdin is permitted at once but "
+						"more than one was found.\n");
+					ret = 1;
+				}
+				stdin_occupied = true;
+			}
+		}
 		if (!ret) {
 			if (dump_cmdline)
 				dump_opt_list(td);
@@ -2534,7 +2595,7 @@ int parse_cmd_line(int argc, char *argv[], int client_type)
 		case 'i':
 			did_arg = true;
 			if (!cur_client) {
-				fio_show_ioengine_help(optarg);
+				exit_val = fio_show_ioengine_help(optarg);
 				do_exit++;
 			}
 			break;
@@ -2713,12 +2774,7 @@ int parse_cmd_line(int argc, char *argv[], int client_type)
 			warnings_fatal = 1;
 			break;
 		case 'j':
-			max_jobs = atoi(optarg);
-			if (!max_jobs || max_jobs > REAL_MAX_JOBS) {
-				log_err("fio: invalid max jobs: %d\n", max_jobs);
-				do_exit++;
-				exit_val = 1;
-			}
+			/* we don't track/need this anymore, ignore it */
 			break;
 		case 'S':
 			did_arg = true;
@@ -2886,7 +2942,7 @@ int parse_cmd_line(int argc, char *argv[], int client_type)
 			log_err("%s: unrecognized option '%s'\n", argv[0],
 							argv[optind - 1]);
 			show_closest_option(argv[optind - 1]);
-			/* fall through */
+			fallthrough;
 		default:
 			do_exit++;
 			exit_val = 1;