Small memory read/write performance issue

[cnbailian]

A comparison of my sysbench tests:

Are there any config optimizations that can solve this issue?

[lifupan]

Hi @cnbailian

You can try to enable " enable_mem_prealloc = true " in your config.

[cnbailian]

Thanks @lifupan do I need to use this config item with another config or kernel config?

I have turned on this config under the latest version of kata, but it has no effect.

This is the qemu process after I started it：

[lifupan]

Thanks @lifupan do I need to use this config item with another config or kernel config?

I have turned on this config under the latest version of kata, but it has no effect.

This is the qemu process after I started it：

It's weird, was there any improvement when you rerun this test many times?

[cnbailian]

Thanks @lifupan do I need to use this config item with another config or kernel config?
I have turned on this config under the latest version of kata, but it has no effect.
This is the qemu process after I started it：

It's weird, was there any improvement when you rerun this test many times?

@lifupan No change.

But the strange thing is that I had success once after I just changed it, and then disabling this mem_prealloc config also still worked, and then finally the machine rebooted and it never worked again.