From: Peter Dinda <pdinda@northwestern.edu>
Date: Tue, 26 Jun 2012 21:33:10 +0000 (-0500)
Subject: Timed yielding in vmm_halt to avoid pegging CPU
X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=commitdiff_plain;h=4d17b20a86eb8102a287263372458fcb9019c232;hp=a04338047280b77bdaa3882b748a442d9c9c06a8;p=palacios.git

Timed yielding in vmm_halt to avoid pegging CPU
---

diff --git a/palacios/src/palacios/vmm_halt.c b/palacios/src/palacios/vmm_halt.c
index eca50cf..60ca74b 100644
--- a/palacios/src/palacios/vmm_halt.c
+++ b/palacios/src/palacios/vmm_halt.c
@@ -28,6 +28,8 @@
 #endif
 
 
+#define YIELD_TIME_USEC 1000
+
 
 //
 // This should trigger a #GP if cpl != 0, otherwise, yield to host
@@ -44,7 +46,7 @@ int v3_handle_halt(struct guest_info * info) {
             uint64_t t, cycles;
 	    /* Yield, allowing time to pass while yielded */
 	    t = v3_get_host_time(&info->time_state);
-	    v3_yield(info);
+	    v3_yield_timed(info,YIELD_TIME_USEC);
 	    cycles = v3_get_host_time(&info->time_state) - t;
 	    v3_advance_time(info, &cycles);