client: make ETA interval poll period configurage in fio_client_ops

Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/client.c b/client.c
index df603f7..5545a8a 100644
--- a/client.c
+++ b/client.c
@@ -36,6 +36,7 @@
 	.stop		= handle_stop,
 	.eta		= display_thread_status,
 	.probe		= handle_probe,
+	.eta_msec	= FIO_CLIENT_DEF_ETA_MSEC,
 };
 
 static struct timeval eta_tv;
@@ -1163,7 +1164,7 @@
 			struct timeval tv;
 
 			gettimeofday(&tv, NULL);
-			if (mtime_since(&eta_tv, &tv) >= 900) {
+			if (mtime_since(&eta_tv, &tv) >= ops->eta_msec) {
 				request_client_etas(ops);
 				memcpy(&eta_tv, &tv, sizeof(tv));