Hello, On Mon, Jun 30, 2025 at 02:50:52PM +0200, Florian Weimer wrote: > * Steven Rostedt: > > > SFrames is now supported in gcc binutils and soon will also be supported > > by LLVM. > > Is the LLVM support discussed here? > > [RFC] Adding SFrame support to llvm > <https://discourse.llvm.org/t/rfc-adding-sframe-support-to-llvm/86900> > > Or is there a secone effort? > > > I have more patches on top of this series that add perf support, ftrace > > support, sframe support and the x86 fix ups (for VDSO). But each of those > > patch series can be worked on independently, but they all depend on this > > series (although the x86 specific patches at the end isn't necessarily > > needed, at least for other architectures). > > Related to perf support: I'm writing up the SFrame change proposal for > Fedora, and I want to include testing instructions. Any idea yet what a > typical “perf top” or “perf report” command line would look like? I think you can run "perf report -s dso,sym -g none" then it will show "Children" and "Self" overheads. If callchain in userspace works ok, you will get non-kernel entries (symbols start with "[.]") having more children overhead than the self. $ perf record -g -- perf bench sched messaging $ perf report -s dso,sym -g none | grep -F -e Children -e '[.]' | head # Children Self Shared Object Symbol 63.09% 0.01% perf [.] run_bench 63.09% 0.00% libc.so.6 [.] __libc_start_call_main 63.09% 0.00% perf [.] cmd_bench 63.09% 0.00% perf [.] handle_internal_command 63.09% 0.00% perf [.] main 63.09% 0.00% perf [.] run_argv 63.09% 0.00% perf [.] run_builtin 63.02% 0.00% perf [.] bench_sched_messaging 62.79% 0.00% perf [.] group Thanks, Namhyung
