[Qemu-devel] [PATCH 1/5] qemu-timer: fix off-by-one

Paolo Bonzini posted 6 patches 8 years, 11 months ago
Only 5 patches received!
[Qemu-devel] [PATCH 1/5] qemu-timer: fix off-by-one
Posted by Paolo Bonzini 8 years, 11 months ago
If the first timer is exactly at the current value of the clock, the
deadline is met and the timer should fire.  This fixes itself without icount,
but with icount execution of instructions will stop exactly at the deadline.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 util/qemu-timer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/util/qemu-timer.c b/util/qemu-timer.c
index 6cf70b9..2f20151 100644
--- a/util/qemu-timer.c
+++ b/util/qemu-timer.c
@@ -199,7 +199,7 @@ bool timerlist_expired(QEMUTimerList *timer_list)
     expire_time = timer_list->active_timers->expire_time;
     qemu_mutex_unlock(&timer_list->active_timers_lock);
 
-    return expire_time < qemu_clock_get_ns(timer_list->clock->type);
+    return expire_time <= qemu_clock_get_ns(timer_list->clock->type);
 }
 
 bool qemu_clock_expired(QEMUClockType type)
-- 
2.9.3



Re: [Qemu-devel] [PATCH 1/5] qemu-timer: fix off-by-one
Posted by Edgar E. Iglesias 8 years, 11 months ago
On Fri, Mar 03, 2017 at 02:11:09PM +0100, Paolo Bonzini wrote:
> If the first timer is exactly at the current value of the clock, the
> deadline is met and the timer should fire.  This fixes itself without icount,
> but with icount execution of instructions will stop exactly at the deadline.
> 
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>


> ---
>  util/qemu-timer.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/util/qemu-timer.c b/util/qemu-timer.c
> index 6cf70b9..2f20151 100644
> --- a/util/qemu-timer.c
> +++ b/util/qemu-timer.c
> @@ -199,7 +199,7 @@ bool timerlist_expired(QEMUTimerList *timer_list)
>      expire_time = timer_list->active_timers->expire_time;
>      qemu_mutex_unlock(&timer_list->active_timers_lock);
>  
> -    return expire_time < qemu_clock_get_ns(timer_list->clock->type);
> +    return expire_time <= qemu_clock_get_ns(timer_list->clock->type);
>  }
>  
>  bool qemu_clock_expired(QEMUClockType type)
> -- 
> 2.9.3
> 
> 
> 

Re: [Qemu-devel] [PATCH 1/5] qemu-timer: fix off-by-one
Posted by Alex Bennée 8 years, 11 months ago
Paolo Bonzini <pbonzini@redhat.com> writes:

> If the first timer is exactly at the current value of the clock, the
> deadline is met and the timer should fire.  This fixes itself without icount,
> but with icount execution of instructions will stop exactly at the deadline.
>
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>

> ---
>  util/qemu-timer.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/util/qemu-timer.c b/util/qemu-timer.c
> index 6cf70b9..2f20151 100644
> --- a/util/qemu-timer.c
> +++ b/util/qemu-timer.c
> @@ -199,7 +199,7 @@ bool timerlist_expired(QEMUTimerList *timer_list)
>      expire_time = timer_list->active_timers->expire_time;
>      qemu_mutex_unlock(&timer_list->active_timers_lock);
>
> -    return expire_time < qemu_clock_get_ns(timer_list->clock->type);
> +    return expire_time <= qemu_clock_get_ns(timer_list->clock->type);
>  }
>
>  bool qemu_clock_expired(QEMUClockType type)


--
Alex Bennée