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mem: Allow packet queue to move next send event forward

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This patch changes the packet queue such that when scheduling a send,
the queue is allowed to move the event forward.
This commit is contained in:
Andreas Hansson 2014-10-09 17:51:52 -04:00
parent 6498ccddb2
commit 4a453e8c95
1 changed files with 9 additions and 3 deletions
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12
src/mem/packet_queue.cc
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@ -168,13 +168,19 @@ PacketQueue::scheduleSend(Tick time)
{
// the next ready time is either determined by the next deferred packet,
// or in the cache through the MSHR ready time
Tick nextReady = std::min(deferredPacketReadyTime(), time);
Tick nextReady = std::max(std::min(deferredPacketReadyTime(), time),
curTick() + 1);
if (nextReady != MaxTick) {
// if the sendTiming caused someone else to call our
// recvTiming we could already have an event scheduled, check
if (!sendEvent.scheduled())
em.schedule(&sendEvent, std::max(nextReady, curTick() + 1));
if (!sendEvent.scheduled()) {
em.schedule(&sendEvent, nextReady);
} else if (nextReady < sendEvent.when()) {
// if the new time is earlier than when the event
// currently is scheduled, move it forward
em.reschedule(&sendEvent, nextReady);
}
} else {
// no more to send, so if we're draining, we may be done
if (drainManager && transmitList.empty() && !sendEvent.scheduled()) {