Switch VNET to use adaptive yielding by default, to reduce busy-waiting in the bridge...

diff --git a/linux_module/palacios-vnet-brg.c b/linux_module/palacios-vnet-brg.c
index 1dfe8a8..829c069 100644 (file)
--- a/linux_module/palacios-vnet-brg.c
+++ b/linux_module/palacios-vnet-brg.c
@@ -32,7 +32,7 @@
 
 #define VNET_SERVER_PORT 9000
 
-#define VNET_ADAPTIVE_BRIDGE  0      // set this to one to have bridge go to sleep if there nothing to do...
+#define VNET_ADAPTIVE_BRIDGE  1      // set this to one to have bridge go to sleep if there nothing to do...
 #define VNET_NOPROGRESS_LIMIT 1000   // ... after this many iterations
 #define VNET_YIELD_TIME_USEC  1000   // ... and go to sleep for this long
 
@@ -479,7 +479,7 @@ static int _udp_server(void * arg) {
            } else {
                // Likely not making progress, do potentially slow
                // yield - we won't come back for until VNET_YIELD_TIME_USEC has passed
-               palacios_yield_cpu_timed(VNET_YIELD_TIME_USEC);
+               palacios_sleep_cpu(VNET_YIELD_TIME_USEC);
            }
 
            continue;

diff --git a/palacios/src/vnet/vnet_core.c b/palacios/src/vnet/vnet_core.c
index 7d9942d..70ba382 100644 (file)
--- a/palacios/src/vnet/vnet_core.c
+++ b/palacios/src/vnet/vnet_core.c
@@ -33,7 +33,7 @@
 
 #define VNET_NUM_TX_KICK_THREADS 1
 
-#define VNET_ADAPTIVE_TX_KICK 0         // set to 1 to try to sleep when there is nothing to do
+#define VNET_ADAPTIVE_TX_KICK 1         // set to 1 to try to sleep when there is nothing to do
 #define VNET_NOPROGRESS_LIMIT 1000      //   ... after this many tries
 #define VNET_YIELD_USEC       1000      //   ... and go to sleep for this long