Re: [RFC] bpf: lbr: enable reading LBR from tracing bpf programs
From: Peter Zijlstra <peterz@infradead.org>
Date: 2021-08-19 18:27:33
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On Thu, Aug 19, 2021 at 06:22:07PM +0000, Song Liu wrote:
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And if we're going to be adding new pmu::methods then I figure one that does the whole sample state might be more useful.What do you mean by "whole sample state"? To integrate with exiting perf_sample_data, like perf_output_sample()?
Yeah, the PMI can/does set more than data->br_stack, but I'm now thinking that without an actual PMI, much of that will not be possible. br_stack is special here. Oh well, carry on I suppose.