Hi all, I'm trying to run a highly scaled CPU configuration and finding that
individual Gem5 instances are using up to 250GB of memory with my new
configuration!! I'm wondering if anybody knows the most impactful parameters
for memory usage so I can decide what to try and tone down while still testing
what I want. My configuration is:
Pipeline width: 12
Instruction queue entries: 512
ROB entries: 2048
LSQ entries: 192
SSIT/LFST entries: 512
L1i and d cache: 512KiB
L2 cache: 32MB
I have a feeling it's either the L2 cache or ROB entries, but is it possible
there's some synergistic behaviour at play too? My previous configuration still
had 576 ROB entries and a L2 cache of 4MB but didn't consume anywhere near the
same amount of memory, so it seems odd to be entirely down to this.
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