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authorPaolo Bonzini <pbonzini@redhat.com>2011-02-21 09:51:23 +0100
committerEdgar E. Iglesias <edgar.iglesias@petalogix.com>2011-02-23 10:42:32 +0100
commitc9f7383c6e5423c1b5111d73346a8314b563f019 (patch)
tree78aded7d4f2bd8d8f73322e6e5f228305e2e7336 /qemu-timer.c
parent9a31334f419c1d773cf4b4bfbbdace96fbf8a4f4 (diff)
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do not use qemu_icount_delta in the !use_icount case
The !use_icount code is the same for iothread and non-iothread, except that the timeout is different. Since the timeout might as well be infinite and is only masking bugs, use the higher value. With this change the !use_icount code is handled equivalently in qemu_icount_delta and qemu_calculate_timeout, and we rip it out of the former. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@petalogix.com>
Diffstat (limited to 'qemu-timer.c')
-rw-r--r--qemu-timer.c59
1 files changed, 25 insertions, 34 deletions
diff --git a/qemu-timer.c b/qemu-timer.c
index b0db780..88c7b28 100644
--- a/qemu-timer.c
+++ b/qemu-timer.c
@@ -112,9 +112,7 @@ static int64_t cpu_get_clock(void)
static int64_t qemu_icount_delta(void)
{
- if (!use_icount) {
- return 5000 * (int64_t) 1000000;
- } else if (use_icount == 1) {
+ if (use_icount == 1) {
/* When not using an adaptive execution frequency
we tend to get badly out of sync with real time,
so just delay for a reasonable amount of time. */
@@ -1077,43 +1075,36 @@ void quit_timers(void)
int qemu_calculate_timeout(void)
{
int timeout;
+ int64_t add;
+ int64_t delta;
-#ifdef CONFIG_IOTHREAD
/* When using icount, making forward progress with qemu_icount when the
guest CPU is idle is critical. We only use the static io-thread timeout
for non icount runs. */
- if (!use_icount) {
- return 1000;
+ if (!use_icount || !vm_running) {
+ return 5000;
}
-#endif
- if (!vm_running)
- timeout = 5000;
- else {
- /* XXX: use timeout computed from timers */
- int64_t add;
- int64_t delta;
- /* Advance virtual time to the next event. */
- delta = qemu_icount_delta();
- if (delta > 0) {
- /* If virtual time is ahead of real time then just
- wait for IO. */
- timeout = (delta + 999999) / 1000000;
- } else {
- /* Wait for either IO to occur or the next
- timer event. */
- add = qemu_next_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. */
- if (add > 10000000)
- add = 10000000;
- delta += add;
- qemu_icount += qemu_icount_round (add);
- timeout = delta / 1000000;
- if (timeout < 0)
- timeout = 0;
- }
+ /* Advance virtual time to the next event. */
+ delta = qemu_icount_delta();
+ if (delta > 0) {
+ /* If virtual time is ahead of real time then just
+ wait for IO. */
+ timeout = (delta + 999999) / 1000000;
+ } else {
+ /* Wait for either IO to occur or the next
+ timer event. */
+ add = qemu_next_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. */
+ if (add > 10000000)
+ add = 10000000;
+ delta += add;
+ qemu_icount += qemu_icount_round (add);
+ timeout = delta / 1000000;
+ if (timeout < 0)
+ timeout = 0;
}
return timeout;