Re: [patch] Performance Counters for Linux, v3

[Chris Friesen]

stephane eranian wrote:

> What happens in the following test case:
>
>    - 2-way system (cpu0, cpu1)
>
>    - on cpu0, two processes P1, P2, each self-monitoring and counting event E1.
>      Event E1 can only be measured on counter C1.
>
>    - on cpu1, there is a cpu-wide session, monitoring event E1, thus using C1
>
>    - the scheduler decides to migrate P1 onto CPU1. You now have a
> conflict on C1.
>
> How is this managed?

Prevent the load balancer from moving P1 onto cpu1?

Chris
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