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I'm trying to benchmark my Pi 3 B+ and my Pi 4 B, both running the latest Raspbian Buster, freshly installed on two identical 128 GB microSD cards:

sysbench --test=memory --memory-block-size=1K --memory-total-size=2G --memory-oper=write --num-threads=4 run

The --memory-total-size option doesn't allow me to specify anything larger than 2G and I couldn't get it running.

For comparison, the following command runs perfectly well on my development machine (Linux amd64):

sysbench --test=memory --memory-block-size=1M --memory-total-size=1T --memory-oper=write --num-threads=8 run

Is there any way to run a SysBench writing or reading more than 2 GB of memory?

  • Well, your development linux machine amd64 runs 64 bit, but Rpi4B buster only 32 bit. – tlfong01 Sep 12 at 4:08

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