topic interprocessor interrupt latency in Intel® Moderncode for Parallel Architectures

interprocessor interrupt latency

ntjioe — Wed, 15 Jul 2009 22:45:50 GMT

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

Re: interprocessor interrupt latency

Dmitry_Vyukov — Thu, 16 Jul 2009 06:42:47 GMT

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.

Re: interprocessor interrupt latency

ntjioe — Fri, 17 Jul 2009 17:24:59 GMT

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.