On Thu, Apr 25, 2019 at 02:11:04PM -0700, Palmer Dabbelt wrote: > On Thu, 11 Apr 2019 00:53:50 PDT (-0700), han_...@c-sky.com wrote: > >This patch add support for DWARF register mappings and libdw registers > >initialization, which is used by perf callchain analyzing when > >--call-graph=dwarf is given. > > Is there any way to make this the only backtracer? It's the only one that's > likely to be useful on RISC-V without recompiling everything with > -fno-omit-frame-pointer, which has a major performance hit. >
Frame pointer is the default record mode in record_callchain_opt. Some generic modification seems required to change this, default to use dwarf if riscv and show corresponding message in --help. Thanks, Mao Han
