linux-kernel - Re: [PATCH v4 0/3] perf annotate: Enable cross arch annotate

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Date:	Wed, 13 Jul 2016 15:15:02 +0530
From:	Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com>
To:	acme@...nel.org, mpe@...erman.id.au
Cc:	linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
	anton@...abs.org, ananth@...ibm.com, dja@...ens.net,
	naveen.n.rao@...ux.vnet.ibm.com, David.Laight@...LAB.COM,
	rmk+kernel@....linux.org.uk,
	Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com>
Subject: Re: [PATCH v4 0/3] perf annotate: Enable cross arch annotate

Arnaldo, Michael,

I've tested this patchset on ppc64 BE and LE both. Please review this.

-Ravi

On Friday 08 July 2016 10:10 AM, Ravi Bangoria wrote:
> Perf can currently only support code navigation (branches and calls) in
> annotate when run on the same architecture where perf.data was recorded.
> But cross arch annotate is not supported.
>
> This patchset enables cross arch annotate. Currently I've used x86
> and arm instructions which are already available and adding support
> for powerpc as well. Adding support for other arch will be easy.
>
> I've created this patch on top of acme/perf/core. And tested it with
> x86 and powerpc only.
>
> Note for arm:
> Few instructions were defined under #if __arm__ which I've used as a
> table for arm. But I'm not sure whether instruction defined outside of
> that also contains arm instructions. Apart from that, 'call__parse()'
> and 'move__parse()' contains #ifdef __arm__ directive. I've changed it
> to  if (!strcmp(norm_arch, arm)). I don't have a arm machine to test
> these changes.
>
> Example:
>
>    Record on powerpc:
>    $ ./perf record -a
>
>    Report -> Annotate on x86:
>    $ ./perf report -i perf.data.powerpc --vmlinux vmlinux.powerpc
>
> Changes in v4:
>    - powerpc: Added support for branch instructions that includes 'ctr'
>    - __maybe_unused was misplaced at few location. Corrected it.
>    - Moved position of v3 last patch that define macro for each arch name
>
> v3 link: https://lkml.org/lkml/2016/6/30/99
>
> Naveen N. Rao (1):
>    perf annotate: add powerpc support
>
> Ravi Bangoria (2):
>    perf: Define macro for normalized arch names
>    perf annotate: Enable cross arch annotate
>
>   tools/perf/arch/common.c           |  36 ++---
>   tools/perf/arch/common.h           |  11 ++
>   tools/perf/builtin-top.c           |   2 +-
>   tools/perf/ui/browsers/annotate.c  |   3 +-
>   tools/perf/ui/gtk/annotate.c       |   2 +-
>   tools/perf/util/annotate.c         | 273 ++++++++++++++++++++++++++++++-------
>   tools/perf/util/annotate.h         |   6 +-
>   tools/perf/util/unwind-libunwind.c |   4 +-
>   8 files changed, 265 insertions(+), 72 deletions(-)
>
> --
> 2.5.5
>