Ah thanks for the advice, I see the problem(s) now . Just suprised that the fetch rate is much lower than expected .I am pretty new in this part of M5, so excuse the questions:
However, I am not an expert at all, it seems that theirs really nothing wrong with M5 (from what I can tell now), and perhaps the IPC for Blackscholes is really this low. The only other issue at the moment I can think of is that I did not compile my benchmarks optimally. Is there any recommended flags to include to compile any benchmarks into m5? I basically used the ev67 pre-compiled compiler on the website. I did not tune for ev5.ev6 or ev4, I noticed those were much slower. Thanks, EF On Fri, Oct 2, 2009 at 9:29 PM, Steve Reinhardt <[email protected]> wrote: > You'd have to look back from there in the trace to see what the > threads are up to... probably an icache or itlb miss, I would guess. > The statistics should tell you more about various stalls, but I don't > recall off the top of my head what the specific stats are. > > Steve > > On Fri, Oct 2, 2009 at 7:24 PM, ef <[email protected]> wrote: >> Hello, >> >> I am testing Blackscholes 2.1 on M5. Alpha FS Mode. It seems that the >> IPC is pretty low around .73, I noticed that the fetching rate is >> pretty low , avg fetch of .98 per cycle, out of a 4 wide machine. >> Going through traces, everything seems normal except: I get messages >> like this doing certain spots, which I believe is the culprit: >> >> 8039402330674: system.detail_cpu1.fetch: Running stage. >> 8039402330674: system.detail_cpu1.fetch: There are no more threads >> available to fetch from. >> >> This happens for several cycles, then fetching appears normal. >> >> Right now I have two cores running two threads. Is there anyways I can >> find out more about whats going on? >> >> Thanks, >> EF >> _______________________________________________ >> m5-users mailing list >> [email protected] >> http://m5sim.org/cgi-bin/mailman/listinfo/m5-users >> > _______________________________________________ > m5-users mailing list > [email protected] > http://m5sim.org/cgi-bin/mailman/listinfo/m5-users > _______________________________________________ m5-users mailing list [email protected] http://m5sim.org/cgi-bin/mailman/listinfo/m5-users
