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Thanks Eliot for the follow up.
The reposne is created independently using the memory controller.
and the problem arises inside recvTimingReq, so it happens even before complete sending teh request.
I don't free up the pkt pointer "pkt", I pop the queue element, after the re-try manages to send the packet.
and pop doesn't do any allocation free-up.
From: Eliot Moss <m...@cs.umass.edu>
Sent: Thursday, July 14, 2022 4:21 PM To: The gem5 Users mailing list <gem5-users@gem5.org> Subject: [gem5-users] Re: Packet VALID_ADDR being cleared when try to resend it ! On 7/14/2022 2:46 PM, Abdlerhman Abotaleb wrote:
> Thank you, Eliot, for your reply. 🙏 > I solved it, but still need to understand the cause. * > * > *This is the full story: * > I defined an STL queue of pointers to Packets to store the packets for further resending. > std::queue<PacketPtr> pktQueue; > It is defined as a member of the memory object class. > > And I'm debugging before and after this call > Inside "CoherentXBar::recvTimingReq": > success = memSidePorts[mem_side_port_id]->*sendTimingReq*(pkt); > *Before* the call, it appears that the Packet contains all correct fields (i.e. the address and > flags etc.) > *After * the call it fails to assert the "VALID_ADDR". > > I *solved *this problem as the following: > Inside the newmemory simulation object, when inserting a new blocked packet: > Before: > blockedPacketQueue.push(pkt) > After: > PacketPtr pPkt= new Packet(pkt,false,true); > pktQueue.push(pPkt); > > I still can't figure why the first way doesn't work ! Well, I still wonder if the packet is getting freed (or something) down in the sendTimingReq actions. Among other things, I wonder if you are trying to save it *and* it is getting responded to, which would turn it into a response, etc. Copying it like that is fixing the symptom, but I am not sure it is fixing the real problem. Regards - Eliot _______________________________________________ gem5-users mailing list -- gem5-users@gem5.org To unsubscribe send an email to gem5-users-le...@gem5.org |
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