diff mbox

[PULL,37/62] icount: print a warning if there is no more deadline in sleep=no mode

Message ID 1433517363-32335-38-git-send-email-pbonzini@redhat.com
State New
Headers show

Commit Message

Paolo Bonzini June 5, 2015, 3:15 p.m. UTC 
From: Victor CLEMENT <victor.clement@openwide.fr>

While qemu is running in sleep=no mode, a warning will be printed
when no timer deadline is set.
As this mode is intended for getting deterministic virtual time, if no
timer is set on the virtual clock this determinism is broken.

Signed-off-by: Victor CLEMENT <victor.clement@openwide.fr>
Message-Id: <1432912446-9811-4-git-send-email-victor.clement@openwide.fr>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 cpus.c | 5 +++++
 1 file changed, 5 insertions(+)
diff mbox

Patch

diff --git a/cpus.c b/cpus.c
index 4e90e63..f38b858 100644
--- a/cpus.c
+++ b/cpus.c
@@ -419,6 +419,11 @@  void qemu_clock_warp(QEMUClockType type)
     clock = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL_RT);
     deadline = qemu_clock_deadline_ns_all(QEMU_CLOCK_VIRTUAL);
     if (deadline < 0) {
+        static bool notified;
+        if (!icount_sleep && !notified) {
+            error_report("WARNING: icount sleep disabled and no active timers");
+            notified = true;
+        }
         return;
     }