Re: [PATCH v4 07/18] perf: add generic memory sampling interface

From: Jiri Olsa
Date: Sat Jan 05 2013 - 13:42:27 EST

On Thu, Dec 20, 2012 at 04:41:37PM +0100, Stephane Eranian wrote:

I guess PERF_SAMPLE_COST was replaced by PERF_SAMPLE_WEIGHT added by Andi


> The first collects a cost associated with the sampled
> event. In case of memory access, the cost would be
> the latency of the load, otherwise it defaults to
> the sampling period.
> PERF_SAMPLE_DSRC collects the data source, i.e., where
> did the data associated with the sampled instruction
> come from. Information is stored in a perf_mem_dsrc
> structure. It contains opcode, mem level, tlb, snoop,
> lock information, subject to availability in hardware.
> Signed-off-by: Stephane Eranian <eranian@xxxxxxxxxx>
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