On Mon, 19 May 2025 16:12:39 +0100 Will Deacon <w...@kernel.org> wrote:
> > Perf events work for perf only. My question is why isn't this a tracepoint > > that perf could hook into? > > Well, the perf event came first in this case, so we're stuck with it :/ I wonder what effort it will take to convert perf events to tracepoints ;-) Note, I'm talking about tracepoints and not trace events, where the latter is exposed to tracefs and the former is not. > > I was hoping we could settle for a generic helper that could emit both > the trace event and the perf event (so that the ordering of the two is > portable across architectures) but, judging by Nam's reply, the trace > event is needed before kprobes gets a look in. Perhaps we could add a helper function that does both (perf and tracepoint) and hide the implementation from the code that calls it? But I'm currently still on PTO so I haven't looked at the details yet. -- Steve
