Hey Korey, Thanks a lot! Actually I forgot to mention that I'm using a simple CPU model, so I'm not too concerned about the "out-of-ordering" of instructions. I'll look into that inst_queue.hh file.
Felix Quoting Korey Sewell <[email protected]>: > Hi, > I'm not sure simply looking into the IQ will do the trick, since it's out of > order there's no telling that just because an instruction is in the queue in > a certain order, that it is executed in that order. > > What's complicating what you are asking is that an O3 processor executes > more than 1 instruction a a time. Thus, a question for you to ask yourself > is what happens if an ALU op is executed on the same cycle as a memory > operation? Consequently, hard to quantify what a "stream" is when > superscalar machines operate on things concurrently. > > So if all you need is "many non-memory instructions are executed between any > two memory operations" and dont compare about instruction latency, then Why > not track this on a simpler CPU model like AtomicSimpleCPU, use a trace flag > like Exec, and then gather your stats. There's documentation on m5sim.org to > find help. > > If the O3 is what you need, you want to be able to track when instructions > are executed as well as maybe IQ interaction. The IQ is straightforwardly > located in a file called inst_queue.hh. It's primarily used in the Rename > (rename_impl.hh) or IEW stage of the O3 code (iew_impl.hh). Also memory > operations are in the LSQ section of the code. Browse through there since > you'll want to know where an instruction is executed and also where an > memory operation is sent out.... > > On Thu, Oct 1, 2009 at 3:29 PM, Felix Loh <[email protected]> wrote: > >> Hi, >> >> How do I peek into the instruction queue? Basically, I want to get a >> trace that shows the entire stream of instructions (i.e both memory >> and "regular" instructions). That's because I need to know how many >> non-memory instructions are executed between any two memory operations. >> >> Thanks, >> Felix >> >> _______________________________________________ >> m5-users mailing list >> [email protected] >> http://m5sim.org/cgi-bin/mailman/listinfo/m5-users >> > > > > -- > - Korey > _______________________________________________ m5-users mailing list [email protected] http://m5sim.org/cgi-bin/mailman/listinfo/m5-users
