topic Thanks for the answer. in Software Tuning, Performance Optimization & Platform Monitoring

Maximum size of the PEBS buffer

Arnabjyoti_K_ — Wed, 07 Jun 2017 15:57:39 GMT

Hello all,

This is a question pertaining to the size of the PEBS buffer. Currently, the size of the PEBS buffer is being fixed at 64 KB. Is there any maximum limit to which I can go ? I do not see any information about the maximum size of the PEBS buffer in the Intel Documentation (Chapter 18).

There is a lot of information

McCalpinJohn — Mon, 19 Jun 2017 15:35:35 GMT

There is a lot of information about the details of the save areas in Section 17.4.9 "BTS and DS Save Area". I am not sure whether it provides what you need, but it certainly discusses the storage of PEBS records in the DS save area....

Thanks for the answer.

Arnabjyoti_K_ — Mon, 19 Jun 2017 16:59:52 GMT

Thanks for the answer.

I can see that the size of the PEBS buffer is going to be implemented and tuned in software -- as far as the Intel documentation is concerned, they say that the size of the PEBS buffer is not restricted, and that it comes from a non-paged memory pool. That was probably all that I needed to know.

Regards,

Arnab