Daan De Meyer via devel wrote:
> As mentioned in the change proposal, when using sampling profilers that
> rely on fast access to the stacktrace, there is currently no viable
> alternative to frame pointers. DWARF unwinding in absence of frame
> pointers is too slow because of the complexity of the DWARF format and the
> necessity to copy the stack to userspace and do unwinding there due to the
> lack of an in kernel DWARF unwinder.
And as already pointed out several times in this thread, that is a very
niche use case for which you cannot hold the entire Fedora community
hostage. This is not Facebook Linux.
I do not know anybody personally who runs 24/7 profiling in production as
you apparently do.
Kevin Kofler
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