About using PEBS from the user space

[Harald Servat <harald.servat@bsc.es>]

Dear list,

   I'd like to use the perf library to access PEBS so as to collect 
referenced memory addresses from the user space. I think I've 
successfully setup the perf structures (struct perf_event_attr) to 
configure the performance counters, but I don't see what should I do to 
access to the captured memory addresses. I've seen that within 
arch/x86/kernel/cpu/perf_event_intel_ds.c there are the routines 
alloc_pebs_buffer, alloc_ds_buffer which seems to allocate and setup the 
necessary buffers using kmalloc_node calls. Question is, how can 
replicate this from the user space? And how we should connect these 
buffers to the PEBS infrastructure using perf calls?

Thank you very much in advance.

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