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[Qemu-devel] [RFC PATCH v4 06/13] icount: make icount extra computed on
From: |
fred . konrad |
Subject: |
[Qemu-devel] [RFC PATCH v4 06/13] icount: make icount extra computed on icount clock as well. |
Date: |
Wed, 25 Jun 2014 10:26:41 +0200 |
From: KONRAD Frederic <address@hidden>
This takes icount clock in account for icount extra computation so icount
clock's timers will be triggered at the exact time.
Signed-off-by: KONRAD Frederic <address@hidden>
Reviewed-by: Paolo Bonzini <address@hidden>
---
cpus.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/cpus.c b/cpus.c
index 76de504..4b551f1 100644
--- a/cpus.c
+++ b/cpus.c
@@ -1288,6 +1288,7 @@ static int tcg_cpu_exec(CPUArchState *env)
if (use_icount) {
int64_t count;
int64_t deadline;
+ int64_t icount_deadline;
int decr;
timers_state.qemu_icount -= (cpu->icount_decr.u16.low
+ cpu->icount_extra);
@@ -1304,6 +1305,15 @@ static int tcg_cpu_exec(CPUArchState *env)
deadline = INT32_MAX;
}
+ /*
+ * Take icount clock deadline in account too, and keep the nearest
+ * deadline.
+ */
+ icount_deadline = qemu_clock_deadline_ns_all(QEMU_CLOCK_ICOUNT);
+ if ((icount_deadline >= 0) && (icount_deadline < deadline)) {
+ deadline = icount_deadline;
+ }
+
count = qemu_icount_round(deadline);
timers_state.qemu_icount += count;
decr = (count > 0xffff) ? 0xffff : count;
--
1.9.0
- [Qemu-devel] [RFC PATCH v4 00/13] Reverse execution., fred . konrad, 2014/06/25
- [Qemu-devel] [RFC PATCH v4 02/13] migration: migrate icount fields., fred . konrad, 2014/06/25
- [Qemu-devel] [RFC PATCH v4 01/13] icount: put icount variables into TimerState., fred . konrad, 2014/06/25
- [Qemu-devel] [RFC PATCH v4 03/13] migration: make qemu_savevm_state public., fred . konrad, 2014/06/25
- [Qemu-devel] [RFC PATCH v4 05/13] icount: check for icount clock deadline when cpu loop exits., fred . konrad, 2014/06/25
- [Qemu-devel] [RFC PATCH v4 04/13] icount: introduce icount timer., fred . konrad, 2014/06/25
- [Qemu-devel] [RFC PATCH v4 06/13] icount: make icount extra computed on icount clock as well.,
fred . konrad <=
- [Qemu-devel] [RFC PATCH v4 09/13] introduce reverse execution mechanism., fred . konrad, 2014/06/25
- [Qemu-devel] [RFC PATCH v4 07/13] timer: add cpu_icount_to_ns function., fred . konrad, 2014/06/25
- [Qemu-devel] [RFC PATCH v4 08/13] trace-events: add reverse-execution events., fred . konrad, 2014/06/25
- [Qemu-devel] [RFC PATCH v4 10/13] gdbstub: allow reverse execution in gdb stub., fred . konrad, 2014/06/25
- [Qemu-devel] [RFC PATCH v4 11/13] cpu-exec: trigger a debug request when rexec stops., fred . konrad, 2014/06/25
- [Qemu-devel] [RFC PATCH v4 12/13] cexe: synchronize icount on the next event., fred . konrad, 2014/06/25
- [Qemu-devel] [RFC PATCH v4 13/13] cexe: allow to enable reverse execution., fred . konrad, 2014/06/25