interprocessor interrupt latency

[ntjioe]

Hello,

I am planning to measure interprocessor interrupt latency on my DP server system. Is there any existing tool that will allow me to do that? If no, what Linux system calls are available?

Thank you

[Dmitry_Vyukov]

Quoting - ntjioe

I am planning to measure interprocessor interrupt latency on my DP server system. Is there any existing tool that will allow me to do that? If no, what Linux system calls are available?

I am not aware of any Linux syscalls that predictably send IPIs.
However on Windows you can use FlushProcessWriteBuffers() function. It must send IPIs to all other PEs (processors, cores), and I think wait for reply IPIs.

[ntjioe]

Quoting - Dmitriy Vyukov

Quoting - ntjioe

I am planning to measure interprocessor interrupt latency on my DP server system. Is there any existing tool that will allow me to do that? If no, what Linux system calls are available?

I am not aware of any Linux syscalls that predictably send IPIs.
However on Windows you can use FlushProcessWriteBuffers() function. It must send IPIs to all other PEs (processors, cores), and I think wait for reply IPIs.

Thank you. I will look into it.