Hi,
I want to initiate/new/request a prefetch somewhere in the code like this:
Request *pfReq = new Request(thAddr, cacheBlkSize, Request::PREFETCH);
PacketPtr pkt = new Packet(pfReq, MemCmd::HardPFReq, Packet::Broadcast);
dcachePort->sendTiming(pkt);
Problem is, this request hits MSHR in this part of code:
...
} else {
// miss
Addr blk_addr = blockAlign(pkt->getAddr());
MSHR *mshr = mshrQueue.findMatch(blk_addr);
if (mshr) {
// MSHR hit
//@todo remove hw_pf here
mshr_hits[pkt->cmdToIndex()][0/*pkt->req->threadId()*/]++;
if (mshr->threadNum != 0/*pkt->req->threadId()*/) {
mshr->threadNum = -1;
}
mshr->allocateTarget(pkt, time, order++);
and causes a failure in allocateTarget() because this function first want
to be sure this request is not HardPFReq.
assert(pkt->cmd != MemCmd::HardPFReq);
That mean I am not able to request for a prefetch anywhere I want. Right?
Why it is not possible then?
--
// Naderan *Mahmood;
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