summaryrefslogtreecommitdiff
path: root/qemu-timer.c
diff options
context:
space:
mode:
Diffstat (limited to 'qemu-timer.c')
-rw-r--r--qemu-timer.c129
1 files changed, 53 insertions, 76 deletions
diff --git a/qemu-timer.c b/qemu-timer.c
index acf7a15422..e2551f3298 100644
--- a/qemu-timer.c
+++ b/qemu-timer.c
@@ -153,7 +153,7 @@ struct qemu_alarm_timer {
char const *name;
int (*start)(struct qemu_alarm_timer *t);
void (*stop)(struct qemu_alarm_timer *t);
- void (*rearm)(struct qemu_alarm_timer *t);
+ void (*rearm)(struct qemu_alarm_timer *t, int64_t nearest_delta_ns);
#if defined(__linux__)
int fd;
timer_t timer;
@@ -181,12 +181,46 @@ static inline int alarm_has_dynticks(struct qemu_alarm_timer *t)
return !!t->rearm;
}
+static int64_t qemu_next_alarm_deadline(void)
+{
+ int64_t delta;
+ int64_t rtdelta;
+
+ if (!use_icount && vm_clock->active_timers) {
+ delta = vm_clock->active_timers->expire_time -
+ qemu_get_clock_ns(vm_clock);
+ } else {
+ delta = INT32_MAX;
+ }
+ if (host_clock->active_timers) {
+ int64_t hdelta = host_clock->active_timers->expire_time -
+ qemu_get_clock_ns(host_clock);
+ if (hdelta < delta) {
+ delta = hdelta;
+ }
+ }
+ if (rt_clock->active_timers) {
+ rtdelta = (rt_clock->active_timers->expire_time -
+ qemu_get_clock_ns(rt_clock));
+ if (rtdelta < delta) {
+ delta = rtdelta;
+ }
+ }
+
+ return delta;
+}
+
static void qemu_rearm_alarm_timer(struct qemu_alarm_timer *t)
{
- if (!alarm_has_dynticks(t))
+ int64_t nearest_delta_ns;
+ assert(alarm_has_dynticks(t));
+ if (!rt_clock->active_timers &&
+ !vm_clock->active_timers &&
+ !host_clock->active_timers) {
return;
-
- t->rearm(t);
+ }
+ nearest_delta_ns = qemu_next_alarm_deadline();
+ t->rearm(t, nearest_delta_ns);
}
/* TODO: MIN_TIMER_REARM_NS should be optimized */
@@ -196,23 +230,23 @@ static void qemu_rearm_alarm_timer(struct qemu_alarm_timer *t)
static int mm_start_timer(struct qemu_alarm_timer *t);
static void mm_stop_timer(struct qemu_alarm_timer *t);
-static void mm_rearm_timer(struct qemu_alarm_timer *t);
+static void mm_rearm_timer(struct qemu_alarm_timer *t, int64_t delta);
static int win32_start_timer(struct qemu_alarm_timer *t);
static void win32_stop_timer(struct qemu_alarm_timer *t);
-static void win32_rearm_timer(struct qemu_alarm_timer *t);
+static void win32_rearm_timer(struct qemu_alarm_timer *t, int64_t delta);
#else
static int unix_start_timer(struct qemu_alarm_timer *t);
static void unix_stop_timer(struct qemu_alarm_timer *t);
-static void unix_rearm_timer(struct qemu_alarm_timer *t);
+static void unix_rearm_timer(struct qemu_alarm_timer *t, int64_t delta);
#ifdef __linux__
static int dynticks_start_timer(struct qemu_alarm_timer *t);
static void dynticks_stop_timer(struct qemu_alarm_timer *t);
-static void dynticks_rearm_timer(struct qemu_alarm_timer *t);
+static void dynticks_rearm_timer(struct qemu_alarm_timer *t, int64_t delta);
#endif /* __linux__ */
@@ -715,8 +749,6 @@ void qemu_run_all_timers(void)
qemu_run_timers(host_clock);
}
-static int64_t qemu_next_alarm_deadline(void);
-
#ifdef _WIN32
static void CALLBACK host_alarm_handler(PVOID lpParam, BOOLEAN unused)
#else
@@ -781,33 +813,6 @@ int64_t qemu_next_icount_deadline(void)
return delta;
}
-static int64_t qemu_next_alarm_deadline(void)
-{
- int64_t delta;
- int64_t rtdelta;
-
- if (!use_icount && vm_clock->active_timers) {
- delta = vm_clock->active_timers->expire_time -
- qemu_get_clock_ns(vm_clock);
- } else {
- delta = INT32_MAX;
- }
- if (host_clock->active_timers) {
- int64_t hdelta = host_clock->active_timers->expire_time -
- qemu_get_clock_ns(host_clock);
- if (hdelta < delta)
- delta = hdelta;
- }
- if (rt_clock->active_timers) {
- rtdelta = (rt_clock->active_timers->expire_time -
- qemu_get_clock_ns(rt_clock));
- if (rtdelta < delta)
- delta = rtdelta;
- }
-
- return delta;
-}
-
#if defined(__linux__)
#include "compatfd.h"
@@ -860,20 +865,13 @@ static void dynticks_stop_timer(struct qemu_alarm_timer *t)
timer_delete(host_timer);
}
-static void dynticks_rearm_timer(struct qemu_alarm_timer *t)
+static void dynticks_rearm_timer(struct qemu_alarm_timer *t,
+ int64_t nearest_delta_ns)
{
timer_t host_timer = t->timer;
struct itimerspec timeout;
- int64_t nearest_delta_ns = INT64_MAX;
int64_t current_ns;
- assert(alarm_has_dynticks(t));
- if (!rt_clock->active_timers &&
- !vm_clock->active_timers &&
- !host_clock->active_timers)
- return;
-
- nearest_delta_ns = qemu_next_alarm_deadline();
if (nearest_delta_ns < MIN_TIMER_REARM_NS)
nearest_delta_ns = MIN_TIMER_REARM_NS;
@@ -915,19 +913,12 @@ static int unix_start_timer(struct qemu_alarm_timer *t)
return 0;
}
-static void unix_rearm_timer(struct qemu_alarm_timer *t)
+static void unix_rearm_timer(struct qemu_alarm_timer *t,
+ int64_t nearest_delta_ns)
{
struct itimerval itv;
- int64_t nearest_delta_ns = INT64_MAX;
int err;
- assert(alarm_has_dynticks(t));
- if (!rt_clock->active_timers &&
- !vm_clock->active_timers &&
- !host_clock->active_timers)
- return;
-
- nearest_delta_ns = qemu_next_alarm_deadline();
if (nearest_delta_ns < MIN_TIMER_REARM_NS)
nearest_delta_ns = MIN_TIMER_REARM_NS;
@@ -1014,23 +1005,14 @@ static void mm_stop_timer(struct qemu_alarm_timer *t)
timeEndPeriod(mm_period);
}
-static void mm_rearm_timer(struct qemu_alarm_timer *t)
+static void mm_rearm_timer(struct qemu_alarm_timer *t, int64_t delta)
{
- int nearest_delta_ms;
-
- assert(alarm_has_dynticks(t));
- if (!rt_clock->active_timers &&
- !vm_clock->active_timers &&
- !host_clock->active_timers) {
- return;
- }
-
- timeKillEvent(mm_timer);
-
- nearest_delta_ms = (qemu_next_alarm_deadline() + 999999) / 1000000;
+ int nearest_delta_ms = (delta + 999999) / 1000000;
if (nearest_delta_ms < 1) {
nearest_delta_ms = 1;
}
+
+ timeKillEvent(mm_timer);
mm_timer = timeSetEvent(nearest_delta_ms,
mm_period,
mm_alarm_handler,
@@ -1082,19 +1064,14 @@ static void win32_stop_timer(struct qemu_alarm_timer *t)
}
}
-static void win32_rearm_timer(struct qemu_alarm_timer *t)
+static void win32_rearm_timer(struct qemu_alarm_timer *t,
+ int64_t nearest_delta_ns)
{
HANDLE hTimer = t->timer;
int nearest_delta_ms;
BOOLEAN success;
- assert(alarm_has_dynticks(t));
- if (!rt_clock->active_timers &&
- !vm_clock->active_timers &&
- !host_clock->active_timers)
- return;
-
- nearest_delta_ms = (qemu_next_alarm_deadline() + 999999) / 1000000;
+ nearest_delta_ms = (nearest_delta_ns + 999999) / 1000000;
if (nearest_delta_ms < 1) {
nearest_delta_ms = 1;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-26 19:55:38 +0000