Hi,
You are right about the “execution” in that the transaction is only put in the
trace when the sendTiming call is successful (and thus the port downstream has
accepted the packet). This should not present any issues in general. The second
problem you mention, with the WriteResp instead of a Req is a bug and I’ll fix
that. The reason is the order of accepting the packet and putting it in the
trace, and the CommMonitor needs to store the request type before passing it on
to be on the safe side. It will only cause problems with the monitor directly
attached to the memory.
Thanks for the pointer.
Andreas
From: huangyongbing <[email protected]<mailto:[email protected]>>
Reply-To: gem5 users mailing list
<[email protected]<mailto:[email protected]>>
Date: Tuesday, 26 November 2013 09:26
To: "[email protected]<mailto:[email protected]>"
<[email protected]<mailto:[email protected]>>
Subject: [gem5-users] Usage of CommMonitor
Hi all,
I want to use CommMonitor to collect memory trace. I put the
CommMonitor between the membus and physmem. The configuration file of
CommMonitor is as follows:
self.mem_monitor = CommMonitor(trace_file="mem_comm.trace")
self.membus.master = self.mem_monitor.slave
self.mem_monitor.master = self.physmem.port
However, I found two problems according to the memory access trace shown below.
dram access: ReadExReq,253755488
comm access: ReadExReq,253755488
dram access: WriteReq,253883392
comm access: WriteResp,253883392
The first problem is that it seems that the DRAM (Physmem) module is executed
earlier than the CommMonitor module.
The second problem is that the write requests received by CommMonitor are
WriteResp requests whereas the requests received by DRAM module are WriteReq
requests.
So are there any ideas about the problem?
Thanks.
Best regards,
Yongbing Huang
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