Hi Shuchang, As you suggest, the memory does what most memories do…it writes data when it sees a write command, and it reads data on a read command :-). The abstract memory corresponds to a contiguous address range in the host memory (using mmap).
Andreas From: shanshuchang <shanshuch...@ict.ac.cn<mailto:shanshuch...@ict.ac.cn>> Reply-To: gem5 users mailing list <gem5-users@gem5.org<mailto:gem5-users@gem5.org>> Date: Wednesday, 19 December 2012 09:07 To: "gem5-users@gem5.org<mailto:gem5-users@gem5.org>" <gem5-users@gem5.org<mailto:gem5-users@gem5.org>> Subject: [gem5-users] question about memory data Hi all: I am a newer to GEM5 simulator. I want to get the exact memory data stored in the simulated system. I have noted that there is a function AbstractMemory::access(PacketPtr pkt) in abstract_mem.cc. if (pkt->isRead()) { assert(!pkt->isWrite()); if (pkt->isLLSC()) { trackLoadLocked(pkt); } if (pmemAddr) memcpy(pkt->getPtr<uint8_t>(), hostAddr, pkt->getSize()); TRACE_PACKET(pkt->req->isInstFetch() ? "IFetch" : "Read"); numReads[pkt->req->masterId()]++; bytesRead[pkt->req->masterId()] += pkt->getSize(); if (pkt->req->isInstFetch()) bytesInstRead[pkt->req->masterId()] += pkt->getSize(); } else if (pkt->isWrite()) { if (writeOK(pkt)) { if (pmemAddr) memcpy(hostAddr, pkt->getPtr<uint8_t>(), pkt->getSize()); I guess that, the exact operation of memcpy() is to read (write) data from (into) the memory in case of read (write) operations (indicated by pkt->isWrite()). Am I right here? Regards, Shuchang -- IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you. _______________________________________________ gem5-users mailing list gem5-users@gem5.org http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
