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