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qemu_next_deadline should not consider host-time timers 

It is purely for icount-based virtual timers.  And now that we got the
code right, rename the function to clarify the intended scope.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Tested-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
This commit is contained in:
Paolo Bonzini 2011-04-13 10:03:46 +02:00 committed by Edgar E. Iglesias
parent 1ece93a91b
commit cb842c90a4
3 changed files with 7 additions and 12 deletions
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4
cpus.c
View File

@ -833,7 +833,7 @@ static void *qemu_tcg_cpu_thread_fn(void *arg)
while (1) {
cpu_exec_all();
if (use_icount && qemu_next_deadline() <= 0) {
if (use_icount && qemu_next_icount_deadline() <= 0) {
qemu_notify_event();
}
qemu_tcg_wait_io_event();
@ -1050,7 +1050,7 @@ static int tcg_cpu_exec(CPUState *env)
qemu_icount -= (env->icount_decr.u16.low + env->icount_extra);
env->icount_decr.u16.low = 0;
env->icount_extra = 0;
count = qemu_icount_round (qemu_next_deadline());
count = qemu_icount_round(qemu_next_icount_deadline());
qemu_icount += count;
decr = (count > 0xffff) ? 0xffff : count;
count -= decr;

13
qemu-timer.c
View File

@ -452,7 +452,7 @@ void qemu_clock_warp(QEMUClock *clock)
}
vm_clock_warp_start = qemu_get_clock_ns(rt_clock);
deadline = qemu_next_deadline();
deadline = qemu_next_icount_deadline();
if (deadline > 0) {
/*
* Ensure the vm_clock proceeds even when the virtual CPU goes to
@ -765,21 +765,16 @@ static void host_alarm_handler(int host_signum)
}
}
int64_t qemu_next_deadline(void)
int64_t qemu_next_icount_deadline(void)
{
/* To avoid problems with overflow limit this to 2^32. */
int64_t delta = INT32_MAX;
assert(use_icount);
if (active_timers[QEMU_CLOCK_VIRTUAL]) {
delta = active_timers[QEMU_CLOCK_VIRTUAL]->expire_time -
qemu_get_clock_ns(vm_clock);
}
if (active_timers[QEMU_CLOCK_HOST]) {
int64_t hdelta = active_timers[QEMU_CLOCK_HOST]->expire_time -
qemu_get_clock_ns(host_clock);
if (hdelta < delta)
delta = hdelta;
}
if (delta < 0)
delta = 0;
@ -1169,7 +1164,7 @@ int qemu_calculate_timeout(void)
} else {
/* Wait for either IO to occur or the next
timer event. */
add = qemu_next_deadline();
add = qemu_next_icount_deadline();
/* We advance the timer before checking for IO.
Limit the amount we advance so that early IO
activity won't get the guest too far ahead. */

2
qemu-timer.h
View File

@ -51,7 +51,7 @@ int qemu_timer_expired(QEMUTimer *timer_head, int64_t current_time);
void qemu_run_all_timers(void);
int qemu_alarm_pending(void);
int64_t qemu_next_deadline(void);
int64_t qemu_next_icount_deadline(void);
void configure_alarms(char const *opt);
void configure_icount(const char *option);
int qemu_calculate_timeout(void);