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
