Not a cache expert, but I verified this myself a while back. Take a look at src/mem/cache/tags/base.cc
In the constructor, p->size should be the cache size that you specified. That verified it for me. On Wed, Jan 15, 2014 at 1:19 AM, Hossein Nikoonia <[email protected]>wrote: > I guess the one that is shown in cpuinfo is fake... the system is already > configured with the cache you've specified in command line arguments. > > Cache experts! Am I right? > > > On Tue, Jan 14, 2014 at 3:16 PM, Ahmad Hassan <[email protected]>wrote: > >> >> Also 'cat /proc/cpuinfo' shows the wrong cache size 1024KB where the >> system was started as: >> >> ./build/X86/gem5.opt configs/example/fs.py >> --kernel=x86_64-vmlinux-2.6.22.9.smp --cpu-type=detailed --caches >> --l1d_size=32kB --l1d_assoc=8 --l1i_size=32kB --l1i_assoc=8 --l2cache >> --l2_size=256kB --l2_assoc=8 - --cacheline_size=64 >> >> Any clues please? >> >> Best, >> >> >> On 14 January 2014 11:11, Zohreh Naghibi <[email protected]>wrote: >> >>> >>> >>> >>> On Tue, Jan 14, 2014 at 2:27 AM, Ahmad Hassan <[email protected]>wrote: >>> >>>> I can see L2, L3 stats in stats.txt but how can I make sure that the >>>> LINUX has the correct cache sizes that I am passing in gem5 command line >>>> please? Is there a way to verify that? Because Linux bootup terminal output >>>> only shows the following incorrect configuration: >>>> "Mount-cache hash table entries: 256 >>>> CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line) >>>> CPU: L2 Cache: 1024K (64 bytes/line)" >>>> >>>> Thanks. >>>> >>>> Ahmad >>>> >>>> >>>> >>>> On 14 January 2014 09:14, Ahmad Hassan <[email protected]> wrote: >>>> >>>>> Hi All, >>>>> >>>>> Please can you tell me how to verify that the Linux has been booted >>>>> with the actual cache configuration passed in gem5? I have run GEM3 with >>>>> L1, L2 and L3 having following sizes. I added L3 bus myself. >>>>> >>>>> ./build/X86/gem5.opt configs/example/fs.py >>>>> --kernel=x86_64-vmlinux-2.6.22.9.smp --cpu-type=detailed --caches >>>>> --num-l2caches=1 --num-l3caches=1 --l1d_size=32kB --l1d_assoc=8 >>>>> --l1i_size=32kB --l1i_assoc=8 --l2cache --l2_size=256kB --l2_assoc=8 >>>>> --l3_assoc=16 --l3_size=8192kB --cacheline_size=64 --l3cache >>>>> >>>>> But when Ubuntu (Lucid) boots up then I don't see any cache >>>>> configuration through 'lscpu' >>>>> >>>>> $lscpu >>>>> Architecture: x86_64 >>>>> CPU op-mode(s): 32-bit, 64-bit >>>>> CPU(s): 1 >>>>> Thread(s) per core: 1 >>>>> Core(s) per socket: 1 >>>>> CPU socket(s): 1 >>>>> Vendor ID: M5 Simulator >>>>> CPU family: 15 >>>>> Model: 37 >>>>> Stepping: 1 >>>>> CPU MHz: 2000.010 >>>>> >>>>> Moreover, 'ls /sys/devices/system/cpu/cpu0' only shows 'topology' dir >>>>> and no cache directory. >>>>> >>>>> Also during the system bootup, the Linux shows wrong cache >>>>> configuration for both L1 and L2: >>>>> : >>>>> "Mount-cache hash table entries: 256 >>>>> CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line) >>>>> CPU: L2 Cache: 1024K (64 bytes/line)" >>>>> >>>>> Thanks. >>>>> >>>>> >>>> >>>> _______________________________________________ >>>> gem5-users mailing list >>>> [email protected] >>>> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >>>> >>> >>> >>> _______________________________________________ >>> gem5-users mailing list >>> [email protected] >>> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >>> >> >> >> _______________________________________________ >> gem5-users mailing list >> [email protected] >> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >> > > > _______________________________________________ > gem5-users mailing list > [email protected] > http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users > -- Martin
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