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 >
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