diff mbox

[3/3] icount: print a warning if there is no more deadline in no_rt mode

Message ID 1432727523-2008-4-git-send-email-victor.clement@openwide.fr
State New
Headers show

Commit Message

Victor CLEMENT May 27, 2015, 11:52 a.m. UTC 
While qemu is running in icount_no_rt 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>
---
 cpus.c | 6 ++++++
 1 file changed, 6 insertions(+)
diff mbox

Patch

diff --git a/cpus.c b/cpus.c
index eac3e19..c358c2e 100644
--- a/cpus.c
+++ b/cpus.c
@@ -419,6 +419,12 @@  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_no_rt && !notified) {
+            fprintf(stderr, "cpus: WARNING: icount no_rt enabled and no more \
+active timer\n");
+            notified = true;
+        }
         return;
     }