[dpdk-dev] [PATCH] lib/librte_vhost: combine select with sleep

[Huawei Xie <huawei.xie@intel.com>]

combine sleep into select when there is no file descriptors to be monitored.

Signed-off-by: Huawei Xie <huawei.xie@intel.com>
---
 lib/librte_vhost/vhost_user/fd_man.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/lib/librte_vhost/vhost_user/fd_man.c b/lib/librte_vhost/vhost_user/fd_man.c
index 63ac4df..a89b6fe 100644
--- a/lib/librte_vhost/vhost_user/fd_man.c
+++ b/lib/librte_vhost/vhost_user/fd_man.c
@@ -211,25 +211,26 @@ fdset_event_dispatch(struct fdset *pfdset)
 	void *dat;
 	int fd;
 	int remove1, remove2;
+	int ret;
 
 	if (pfdset == NULL)
 		return;
 
 	while (1) {
+		struct timeval tv;
+		tv.tv_sec = 1;
+		tv.tv_usec = 0;
 		FD_ZERO(&rfds);
 		FD_ZERO(&wfds);
 		pthread_mutex_lock(&pfdset->fd_mutex);
 
 		maxfds = fdset_fill(&rfds, &wfds, pfdset);
-		if (maxfds == -1) {
-			pthread_mutex_unlock(&pfdset->fd_mutex);
-			sleep(1);
-			continue;
-		}
 
 		pthread_mutex_unlock(&pfdset->fd_mutex);
 
-		select(maxfds + 1, &rfds, &wfds, NULL, NULL);
+		ret = select(maxfds + 1, &rfds, &wfds, NULL, &tv);
+		if (ret <= 0)
+			continue;
 
 		for (i = 0; i < num; i++) {
 			remove1 = remove2 = 0;
-- 
1.8.1.4