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

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Date:   Fri, 19 Aug 2016 11:11:31 +0530
From:   Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com>
To:     acme@...nel.org
Cc:     mpe@...erman.id.au, 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
Subject: Re: [PATCH v4 0/3] perf annotate: Enable cross arch annotate

I've sent v5 series for this. Please review it.

Thanks,
Ravi

On Wednesday 13 July 2016 03:15 PM, Ravi Bangoria wrote:
> 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
>>
>