Hi all,
I learn a common multi-programmed simulation methodology adopted by many
architecture researchers. But I am not clear its implementation
internals. I describe its idea in brief as following.
For multi-programmed workload consists of M programs, this methodology
firstly fast-forwards N1 instructions. Before detailed measurement, it
warms up cache with N2 instruction. Then detailed simulation is carried
out until all programs execute N3 instructions. Statistics reports only
for the first N3 instructions in detailed simulation.
I want to know how to implement it with Gem5 in practice. As far as I
know, gem5 provides '-s' option to support mode switch from
TimingSimpleCPU to DetailedCPU (O3). However, I have no idea to control
each program to execute fixed N3 instructions. Besides, if some programs
finish retiring N3 instructions before others, how to dump the stats to
assure it is correct for all programs that have executed N3 instructions.
Many thanks,
Hanfeng
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