Hi everyone, It seems like with the latest versions of gem5 (19 and 20.0.0.2), dcache and icache occupancy never reaches 1 (100%) no matter what the warm up time is.
My gem5 command: build/X86/gem5.fast -r -d /home/gagan/outputs/characterization/8selected/cg_D configs/example/fs.py --mem-type=Ramulator --mem-size=32GB -n 8 -r 1 --disk-image=/home/gagan/disk_images/ubuntu-server-16.04.6.img --checkpoint -dir=/home/gagan/CPTs/8cores/cg_D --cpu-type=DerivO3CPU --atomic-warm-up=10000000000 --real-warm-up=10000000000 --rel-max-tick=10000000000 --caches --l2cache --l3cache --ramulator-config=/home/gagan/ramulator_configs/DDR4-3200-1CH2RANK-BASE.cfg Note: L2 occupancy reaches 1. If I add an L3 cache, its occupancy also reaches 1. L1 icache = 32kB per core, L2 dcache = 32kB per core, L2 = 512kB per core. L3 = 16MB. config.ini reports the correct size. system.cpu0.dcache.tags.occ_percent::total 0.000003 > system.cpu1.dcache.tags.occ_percent::total 0.000003 > system.cpu2.dcache.tags.occ_percent::total 0.000003 > system.cpu3.dcache.tags.occ_percent::total 0.000003 > system.cpu4.dcache.tags.occ_percent::total 0.000003 > system.cpu5.dcache.tags.occ_percent::total 0.000003 > system.cpu6.dcache.tags.occ_percent::total 0.000003 > system.cpu7.dcache.tags.occ_percent::total 0.000003 Stats description: "# Average percentage of cache occupancy". This problem isn't present in an older version of Gem5 (early 2018) that I had been using until now. Thank you. - Gagan
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