diff --git a/engines/io_uring.c b/engines/io_uring.c
index 5393758aa6..0ee5a82227 100644
--- a/engines/io_uring.c
+++ b/engines/io_uring.c
@@ -613,12 +613,6 @@ static void fio_ioring_queued(struct thread_data *td, int start, int nr)
 
 		start++;
 	}
-
-	/*
-	 * only used for iolog
-	 */
-	if (td->o.read_iolog_file)
-		memcpy(&td->last_issue, &now, sizeof(now));
 }
 
 static int fio_ioring_commit(struct thread_data *td)
diff --git a/engines/libaio.c b/engines/libaio.c
index 33b8c12f96..da5279f485 100644
--- a/engines/libaio.c
+++ b/engines/libaio.c
@@ -368,12 +368,6 @@ static void fio_libaio_queued(struct thread_data *td, struct io_u **io_us,
 		memcpy(&io_u->issue_time, &now, sizeof(now));
 		io_u_queued(td, io_u);
 	}
-
-	/*
-	 * only used for iolog
-	 */
-	if (td->o.read_iolog_file)
-		memcpy(&td->last_issue, &now, sizeof(now));
 }
 
 static int fio_libaio_commit(struct thread_data *td)
diff --git a/engines/librpma_fio.c b/engines/librpma_fio.c
index 42d6163ea1..3e7ec16696 100644
--- a/engines/librpma_fio.c
+++ b/engines/librpma_fio.c
@@ -597,16 +597,6 @@ int librpma_fio_client_commit(struct thread_data *td)
 		}
 	}
 
-	if ((fill_time = fio_fill_issue_time(td))) {
-		fio_gettime(&now, NULL);
-
-		/*
-		 * only used for iolog
-		 */
-		if (td->o.read_iolog_file)
-			memcpy(&td->last_issue, &now, sizeof(now));
-
-	}
 	/* move executed io_us from queued[] to flight[] */
 	for (i = 0; i < ccd->io_u_queued_nr; i++) {
 		struct io_u *io_u = ccd->io_us_queued[i];
diff --git a/engines/rdma.c b/engines/rdma.c
index fcb4106889..dd088e6aba 100644
--- a/engines/rdma.c
+++ b/engines/rdma.c
@@ -832,12 +832,6 @@ static void fio_rdmaio_queued(struct thread_data *td, struct io_u **io_us,
 		memcpy(&io_u->issue_time, &now, sizeof(now));
 		io_u_queued(td, io_u);
 	}
-
-	/*
-	 * only used for iolog
-	 */
-	if (td->o.read_iolog_file)
-		memcpy(&td->last_issue, &now, sizeof(now));
 }
 
 static int fio_rdmaio_commit(struct thread_data *td)
diff --git a/init.c b/init.c
index 442dab4273..549a25600f 100644
--- a/init.c
+++ b/init.c
@@ -628,13 +628,6 @@ static int fixup_options(struct thread_data *td)
 	}
 #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;
-	}
-
 	if (o->zone_mode == ZONE_MODE_NONE && o->zone_size) {
 		log_err("fio: --zonemode=none and --zonesize are not compatible.\n");
 		ret |= 1;
diff --git a/ioengines.c b/ioengines.c
index e2316ee4e3..f5719baf4c 100644
--- a/ioengines.c
+++ b/ioengines.c
@@ -358,16 +358,8 @@ enum fio_q_status td_io_queue(struct thread_data *td, struct io_u *io_u)
 
 	if (td_ioengine_flagged(td, FIO_SYNCIO) ||
 		async_ioengine_sync_trim(td, io_u)) {
-		if (fio_fill_issue_time(td)) {
+		if (fio_fill_issue_time(td))
 			fio_gettime(&io_u->issue_time, NULL);
-
-			/*
-			 * only used for iolog
-			 */
-			if (td->o.read_iolog_file)
-				memcpy(&td->last_issue, &io_u->issue_time,
-						sizeof(io_u->issue_time));
-		}
 	}
 
 
@@ -444,16 +436,8 @@ enum fio_q_status td_io_queue(struct thread_data *td, struct io_u *io_u)
 	if (!td_ioengine_flagged(td, FIO_SYNCIO) &&
 		!async_ioengine_sync_trim(td, io_u)) {
 		if (fio_fill_issue_time(td) &&
-			!td_ioengine_flagged(td, FIO_ASYNCIO_SETS_ISSUE_TIME)) {
+			!td_ioengine_flagged(td, FIO_ASYNCIO_SETS_ISSUE_TIME))
 			fio_gettime(&io_u->issue_time, NULL);
-
-			/*
-			 * only used for iolog
-			 */
-			if (td->o.read_iolog_file)
-				memcpy(&td->last_issue, &io_u->issue_time,
-						sizeof(io_u->issue_time));
-		}
 	}
 
 	return ret;
diff --git a/iolog.c b/iolog.c
index cc2cbc65ef..8268330528 100644
--- a/iolog.c
+++ b/iolog.c
@@ -80,23 +80,23 @@ void log_file(struct thread_data *td, struct fio_file *f,
 
 static void iolog_delay(struct thread_data *td, unsigned long delay)
 {
-	uint64_t usec = utime_since_now(&td->last_issue);
-	unsigned long orig_delay = delay;
+	uint64_t usec;
+	unsigned long delay_wanted;
 	uint64_t this_delay;
-	struct timespec ts;
+	struct timespec ts, ts_after_sleep;
 
-	if (delay < td->time_offset) {
-		td->time_offset = 0;
-		return;
-	}
+	fio_gettime(&ts, NULL);
+	usec = utime_since(&td->last_issue, &ts) + td->time_offset;
 
-	delay -= td->time_offset;
-	if (delay < usec)
+	if (delay <= usec) {
+		td->time_offset = usec-delay;
+		td->last_issue = ts;
 		return;
+	}
 
 	delay -= usec;
 
-	fio_gettime(&ts, NULL);
+	delay_wanted = delay;
 	while (delay && !td->terminate) {
 		this_delay = delay;
 		if (this_delay > 500000)
@@ -106,11 +106,13 @@ static void iolog_delay(struct thread_data *td, unsigned long delay)
 		delay -= this_delay;
 	}
 
-	usec = utime_since_now(&ts);
-	if (usec > orig_delay)
-		td->time_offset = usec - orig_delay;
+	fio_gettime(&ts_after_sleep, NULL);
+	usec = utime_since(&ts, &ts_after_sleep);
+	if (usec > delay_wanted)
+		td->time_offset = usec - delay_wanted;
 	else
 		td->time_offset = 0;
+	td->last_issue = ts_after_sleep;
 }
 
 static int ipo_special(struct thread_data *td, struct io_piece *ipo)