{
MigrationState *s = opaque;
int64_t initial_time = qemu_get_clock_ms(rt_clock);
+ int64_t sleep_time = 0;
int64_t max_size = 0;
bool last_round = false;
int ret;
qemu_mutex_unlock_iothread();
while (true) {
- int64_t current_time = qemu_get_clock_ms(rt_clock);
+ int64_t current_time;
uint64_t pending_size;
qemu_mutex_lock_iothread();
}
}
qemu_mutex_unlock_iothread();
+ current_time = qemu_get_clock_ms(rt_clock);
if (current_time >= initial_time + BUFFER_DELAY) {
uint64_t transferred_bytes = s->bytes_xfer;
- uint64_t time_spent = current_time - initial_time;
+ uint64_t time_spent = current_time - initial_time - sleep_time;
double bandwidth = transferred_bytes / time_spent;
max_size = bandwidth * migrate_max_downtime() / 1000000;
DPRINTF("transferred %" PRIu64 " time_spent %" PRIu64
" bandwidth %g max_size %" PRId64 "\n",
transferred_bytes, time_spent, bandwidth, max_size);
+ /* if we haven't sent anything, we don't want to recalculate
+ 10000 is a small enough number for our purposes */
+ if (s->dirty_bytes_rate && transferred_bytes > 10000) {
+ s->expected_downtime = s->dirty_bytes_rate / bandwidth;
+ }
s->bytes_xfer = 0;
+ sleep_time = 0;
initial_time = current_time;
}
if (!last_round && (s->bytes_xfer >= s->xfer_limit)) {
/* usleep expects microseconds */
g_usleep((initial_time + BUFFER_DELAY - current_time)*1000);
+ sleep_time += qemu_get_clock_ms(rt_clock) - current_time;
}
ret = buffered_flush(s);
if (ret < 0) {
s->buffer = NULL;
s->buffer_size = 0;
s->buffer_capacity = 0;
+ /* This is a best 1st approximation. ns to ms */
+ s->expected_downtime = max_downtime/1000000;
s->xfer_limit = s->bandwidth_limit / XFER_LIMIT_RATIO;
s->complete = false;