> > I think it's useful. Makes it easy to do kernel/user break downs. > > perf record should support the same. > > Don't we have this already with: > > [root@quaco ~]# perf stat -e cycles:u,instructions:u,cycles:k,instructions:k > -a -- sleep 1
This only works for simple cases. Try it for --topdown or multiple -M metrics. -Andi
