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Subject[Question] : tie a task to a cluster when it shares memory resources

Hi all,

I am not expert on the NUMA area and the scheduler but I was wondering
the following:

On numa a process can define a memory policy to optimize access because
remote memory access is suboptimal.

On a multicluster (aka multipackage), eg. Bi-Xeon 4 cores, the scheduler
load balancing can spawn/balance a task to the second cluster even if
the task is resulting from a fork or a pthread_create. If I am correct
that could impact the performances due to L2 cache misses, no ?

Won't it be more efficient to tie a task to a cluster when it shares
memory resources with another task on the same cluster ? and when the
task does 'exec', this constraint is removed.

-- Daniel

<> │ Open source software for ARM SoCs

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