Hi Malek, Thanks a lot for the update. I will get the recent revision. Does this revision calculate cache miss rates periodically when dumping stats periodically?
And about my calculation, I actually sum up L1 misses across all L1 caches and consider this to be overall L2 accesses. In fact I am calculating the average L2 miss rate and since my L2 is shared among all cores, I look at it as a big shared L2 cache. Thanks, Mahshid On Wed, Jun 12, 2013 at 1:04 PM, Malek Musleh <malek.mus...@gmail.com>wrote: > The patch was incorporated into some other recent ruby stat changes > recently (1-2 weeks): specifically the removal of the cache profiler, and > the counting of hits/misses directly in the sm file. So you should probably > update. > > The other thing is, I think your complicating your calculations a bit: > > L2 miss rate = 100*(total L2 misses for all L2 banks) / (total L1 Dcache > misses+total L1 Icache misses) > > Specifically, how are you going to access an L1 cache miss count/rate from > an L2 cache in the code? You should just stick to basics when thinking > about rates (%/total%): Whenever a request comes from L1port to L2 cache, > it is an access, and when that access "misses" (the request has to be > forwarded/sent up to directory) it is a miss type. > > Malek > > > > On Wed, Jun 12, 2013 at 12:51 PM, Mahshid Sedghi <mahshid.sed...@gmail.com > > wrote: > >> Thanks for your reply Maxime. But is there anything wrong with the way I >> calculate the rates? I see that the patch has been submitted for review >> long time back, but has not been applied to the gem5 release yet. Is this >> patch reliable? >> >> Thanks. >> Mahshid >> >> >> On Wed, Jun 12, 2013 at 7:29 AM, Maxime Chéramy <maxime.cher...@gmail.com >> > wrote: >> >>> Have a look to http://reviews.gem5.org/r/1467/ but the support of >>> MESI_CMP is not correct, you'll have to do some changes. >>> >>> 2013/6/12 Mahshid Sedghi <mahs...@cse.psu.edu> >>> >>>> Hi all, >>>> >>>> I'm trying to calculate L1 and L2 cache miss rates for a full system >>>> simulation using ruby (MESI_CMP_directory) + garnet. I dump stats >>>> periodically to get the trend of the rates. I can see that in ruby.stats, >>>> total_misses for each L1 and L2 cache bank is reported. Also, I can see the >>>> events which are happening inside the coherency protocol. So, I use the >>>> total "Load" and "Store" counts and calculate the miss rates as the >>>> following: >>>> >>>> L1 Dcache miss rate = 100* (total L1D misses for all L1D caches) >>>> /(Loads+Stores) >>>> >>>> L2 miss rate = 100*(total L2 misses for all L2 banks) / (total L1 >>>> Dcache misses+total L1 Icache misses) >>>> >>>> But for some reason, the rates I am getting does not make sense. I was >>>> wondering if this is the right way to calculate the miss rates using ruby >>>> statistics. >>>> >>>> I appreciate any help. >>>> Mahshid >>>> >>>> _______________________________________________ >>>> gem5-users mailing list >>>> gem5-users@gem5.org >>>> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >>>> >>> >>> >>> _______________________________________________ >>> gem5-users mailing list >>> gem5-users@gem5.org >>> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >>> >> >> >> _______________________________________________ >> gem5-users mailing list >> gem5-users@gem5.org >> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >> > > > _______________________________________________ > gem5-users mailing list > gem5-users@gem5.org > http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >
_______________________________________________ gem5-users mailing list gem5-users@gem5.org http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
