Signed-off-by: Daniele Di Proietto <diproiet...@vmware.com>
---
lib/netdev-dummy.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/lib/netdev-dummy.c b/lib/netdev-dummy.c
index 54a1152..aa244b6 100644
--- a/lib/netdev-dummy.c
+++ b/lib/netdev-dummy.c
@@ -19,6 +19,7 @@
#include "dummy.h"
#include <errno.h>
+#include <unistd.h>
#include "dp-packet.h"
#include "dpif-netdev.h"
@@ -971,6 +972,20 @@ netdev_dummy_rxq_recv(struct netdev_rxq *rxq_, struct
dp_packet **arr,
ovs_mutex_unlock(&netdev->mutex);
if (!packet) {
+ if (netdev_is_pmd(&netdev->up)) {
+ /* If 'netdev' is a PMD device, this is called as part of the PMD
+ * thread busy loop. We yield here (without quiescing) for two
+ * reasons:
+ *
+ * - To reduce the CPU utilization during the testsuite
+ * - To give valgrind a chance to switch thread. According
+ * to the valgrind documentation, there's a big lock that
+ * prevents multiple thread from being executed at the same
+ * time. On my system, without this sleep, the pmd threads
+ * testcases fail under valgrind, because ovs-vswitchd becomes
+ * unresponsive. */
+ sched_yield();
+ }
return EAGAIN;
}
ovs_mutex_lock(&netdev->mutex);
--
2.8.1
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