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Updates to slave catchup mode to use fake events

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Addition of fake EPOLLOUT event mechanism

New memlog feature for debugging purposes
This commit is contained in:
Mark Riddoch
2014-09-30 13:25:45 +01:00
parent 3430fc99d2
commit 0ef87e3cc1
13 changed files with 951 additions and 253 deletions
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44
server/core/poll.c
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@ -1109,3 +1109,47 @@ int new_samples, new_nfds;
if (next_sample >= n_avg_samples)
next_sample = 0;
}
/**
* Insert a fake write completion event for a DCB into the polling
* queue.
*
* This is used to trigger transmission activity on another DCB from
* within the event processing routine of a DCB.
*
* @param dcb DCB to emulate an EPOLLOUT event for
*/
void
poll_fake_write_event(DCB *dcb)
{
uint32_t ev = EPOLLOUT;
spinlock_acquire(&pollqlock);
if (DCB_POLL_BUSY(dcb))
{
dcb->evq.pending_events |= ev;
}
else
{
dcb->evq.pending_events = ev;
if (eventq)
{
dcb->evq.prev = eventq->evq.prev;
eventq->evq.prev->evq.next = dcb;
eventq->evq.prev = dcb;
dcb->evq.next = eventq;
}
else
{
eventq = dcb;
dcb->evq.prev = dcb;
dcb->evq.next = dcb;
}
pollStats.evq_length++;
if (pollStats.evq_length > pollStats.evq_max)
{
pollStats.evq_max = pollStats.evq_length;
}
}
spinlock_release(&pollqlock);
}