Re: [RFC][PATCH 1/2] perf: Add 'perf kmem' tool

Arnaldo Carvalho de Melo
2009-11-23T14:37:12Z

Em Mon, Nov 23, 2009 at 08:22:21AM +0100, Peter Zijlstra escreveu:
> On Mon, 2009-11-23 at 07:51 +0100, Ingo Molnar wrote:
> > I havent tried this - is this really possible to do on an x86 box, with
> > a typical distro? Can i install say Fedora PowerPC debuginfo packages on
> > an x86 box, while also having the x86 debuginfo packages there?
>
> The best option would be to allow to specify a chroot parameter, where
> we can specify the embedded root filesystem on out machine.

yeah, I'm working now on a vmlinux_path, so that the symbol machinery in
perf looks at /lib/module/`uname -r`/build/vmlinux,
/usr/lib/debug/lib/modules/`uname -r`/vmlinux, ./vmlinux as a default or
in getenv("VMLINUX_PATH") if set. Being able to specify a
SYMTAB_PREFIX_PATH also should be possible.

> I'm not even sure embedded distros even have this separate debug package
> crazyness, you simply build the distro with or without debuginfo.

Whatever crazyness people usually do to find the files with matching,
richer symtabs we should support :)

- Arnaldo