Hi, I am running gem5 with ruby on FS mode. I found very large number of simulated cycles (or sim_seconds). For example, I ran SPEC2006 benchmarks: sphinx3 and xalancbmk simultaneously on a 2-core CMP for 500,000,000 instructions (--maxinsts=500000000) from a checkpoint (17,000,000,000,000). As shown in stats.txt:
sim_seconds 1238.163481 sim_insts 852048981 system.cpu0.numCycles 2510326961289 system.cpu0.committedInsts 500000001 system.cpu1.numCycles 2510322889588 system.cpu1.committedInsts 352048980 Therefore the IPC of core-0 is (500000001/2510326961289) 0.0002 and IPC of core-1 is (352048980/2510322889588) 0.0001, which is too small for an IPC. Does anyone have suggestions how to fix it? Here is my command: $ build/X86/m5.fast -d output-fast configs/example/ruby_fs.py --kernel=x86_64-vmlinux-2.6.22.9.smp --script=configs/boot/482-483.rcS --ruby -n 2 --num-l2caches=2 -r 1 --restore-with-cpu=timing --l2_size=2MB --maxinsts=500000000 Thank you in advance. Yingying
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