Emulating pmem on linux machine

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Karthik Velayutham

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Mar 2, 2020, 3:56:05 PM3/2/20

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Hi all,

I have a relatively simple question once again. I was wondering if anyone knew how to properly emulate persistent memory on a linux machine?

Thanks!

Steve Scargall

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Mar 2, 2020, 6:13:39 PM3/2/20

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Hi Karthik,

We have two methods documented at https://docs.pmem.io/persistent-memory/getting-started-guide/creating-development-environments/linux-environments.

Use the Kernel 'memmap' boot option
Use KVM & QEMU

Note 1: The performance of emulated PMem devices back by DRAM or SSD will not match the performance of physical PMem devices. It is not recommended to rely on performance data when using emulated PMem.

Note 2: Data stored on emulated PMem backed by DRAM will lose all the data when the system is power-cycled. Do not store critical data on emulated persistent memory.

Either method should work fine for development and functionality testing purposes. I hope one of those options meets your requirements.