Add --eta-newline option

For certain situations, it's handy to force a new line in
the ETA output. It allows you to easily track what
happened, without having to do detailed logging.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/eta.c b/eta.c
index 5ef31c6..f90d428 100644
--- a/eta.c
+++ b/eta.c
@@ -422,12 +422,13 @@
 
 	je->nr_threads = thread_number;
 	memcpy(je->run_str, run_str, thread_number * sizeof(char));
-
 	return 1;
 }
 
 void display_thread_status(struct jobs_eta *je)
 {
+	static struct timeval disp_eta_new_line;
+	static int eta_new_line_init, eta_new_line_pending;
 	static int linelen_last;
 	static int eta_good;
 	char output[REAL_MAX_JOBS + 512], *p = output;
@@ -439,6 +440,11 @@
 		eta_to_str(eta_str, je->eta_sec);
 	}
 
+	if (eta_new_line_pending) {
+		eta_new_line_pending = 0;
+		p += sprintf(p, "\n");
+	}
+
 	p += sprintf(p, "Jobs: %d (f=%d)", je->nr_running, je->files_open);
 	if (je->m_rate || je->t_rate) {
 		char *tr, *mr;
@@ -492,6 +498,16 @@
 	p += sprintf(p, "\r");
 
 	printf("%s", output);
+
+	if (!eta_new_line_init) {
+		fio_gettime(&disp_eta_new_line, NULL);
+		eta_new_line_init = 1;
+	} else if (eta_new_line &&
+		   mtime_since_now(&disp_eta_new_line) > eta_new_line * 1000) {
+		fio_gettime(&disp_eta_new_line, NULL);
+		eta_new_line_pending = 1;
+	}
+
 	fflush(stdout);
 }