linux-kernel - Re: [PATCH v2 0/2] perf: arm64: Tools support for Dwarf unwinding through SVE functions

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Date:   Fri, 20 May 2022 15:52:14 +0100
From:   James Clark <james.clark@....com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        German Gomez <german.gomez@....com>
Cc:     linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        broonie@...nel.org, leo.yan@...aro.org, mathieu.poirier@...aro.org,
        john.garry@...wei.com, Will Deacon <will@...nel.org>,
        Mike Leach <mike.leach@...aro.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2 0/2] perf: arm64: Tools support for Dwarf unwinding
 through SVE functions



On 20/05/2022 13:32, Arnaldo Carvalho de Melo wrote:
> Em Fri, May 20, 2022 at 12:46:24PM +0100, German Gomez escreveu:
>>
>> On 17/05/2022 15:58, Arnaldo Carvalho de Melo wrote:
>>> Em Tue, May 17, 2022 at 11:20:01AM +0100, James Clark escreveu:
>>>> Changes since v1:
>>>>
>>>>   * Split patchset into kernel side and Perf tool changes
>>> Thanks, now I'll wait for the kernel side to be merged.
>>>
>>> - Arnaldo
>>>  
>>
>> Hi,
>>
>> I think we also need to fix the below import (it's trying to import the
>> perf_regs.h from the kernel, not the tools/ dir).
> 
> Sure, that is why it is important to do a:
> 
> make -C tools/perf build-test
> 

Oops thanks, I will submit another version with a fix for this included.

James

> before posting patches, as it will do, among other tests, a detached tarball test using:
> 
> ⬢[acme@...lbox perf-urgent]$ make help | grep perf
>   perf-tar-src-pkg    - Build perf-5.18.0-rc7.tar source tarball
>   perf-targz-src-pkg  - Build perf-5.18.0-rc7.tar.gz source tarball
>   perf-tarbz2-src-pkg - Build perf-5.18.0-rc7.tar.bz2 source tarball
>   perf-tarxz-src-pkg  - Build perf-5.18.0-rc7.tar.xz source tarball
>   perf-tarzst-src-pkg - Build perf-5.18.0-rc7.tar.zst source tarball
> ⬢[acme@...lbox perf-urgent]$
> 
> That will pick just what is in tools/perf/MANIFEST and that doesn´t
> include the kernel headers, just what is in tools/ then building with
> this patchkit would fail.
> 
> To recap:
> 
> ⬢[acme@...lbox perf-urgent]$ make perf-tarxz-src-pkg
>   TAR
>   PERF_VERSION = 5.18.rc7.gc645054ef517
> ⬢[acme@...lbox perf-urgent]$ ls -la perf-5.18.0-rc7.tar.xz
> -rw-r--r--. 1 acme acme 2364832 May 20 09:32 perf-5.18.0-rc7.tar.xz
> ⬢[acme@...lbox perf-urgent]$ tar tvf perf-5.18.0-rc7.tar.xz | tail
> -rw-rw-r-- root/root      7364 2022-05-20 09:32 perf-5.18.0-rc7/tools/perf/util/vdso.c
> -rw-rw-r-- root/root       639 2022-05-20 09:32 perf-5.18.0-rc7/tools/perf/util/vdso.h
> -rw-rw-r-- root/root      1793 2022-05-20 09:32 perf-5.18.0-rc7/tools/perf/util/zlib.c
> -rw-rw-r-- root/root      2672 2022-05-20 09:32 perf-5.18.0-rc7/tools/perf/util/zstd.c
> drwxrwxr-x root/root         0 2022-05-20 09:32 perf-5.18.0-rc7/tools/scripts/
> -rw-rw-r-- root/root      1091 2022-05-20 09:32 perf-5.18.0-rc7/tools/scripts/Makefile.arch
> -rw-rw-r-- root/root      5905 2022-05-20 09:32 perf-5.18.0-rc7/tools/scripts/Makefile.include
> -rw-rw-r-- root/root      5288 2022-05-20 09:32 perf-5.18.0-rc7/tools/scripts/utilities.mak
> -rw-r--r-- acme/acme        41 2022-05-20 09:32 perf-5.18.0-rc7/HEAD
> -rw-r--r-- acme/acme        46 2022-05-20 09:32 perf-5.18.0-rc7/PERF-VERSION-FILE
> ⬢[acme@...lbox perf-urgent]$
> 
> - Arnaldo
>  
>> diff --git a/tools/perf/util/libunwind/arm64.c b/tools/perf/util/libunwind/arm64.c
>> index 15f60fd09424..014d82159656 100644
>> --- a/tools/perf/util/libunwind/arm64.c
>> +++ b/tools/perf/util/libunwind/arm64.c
>> @@ -24,7 +24,7 @@
>>  #include "unwind.h"
>>  #include "libunwind-aarch64.h"
>>  #define perf_event_arm_regs perf_event_arm64_regs
>> -#include <../../../../arch/arm64/include/uapi/asm/perf_regs.h>
>> +#include <../../../arch/arm64/include/uapi/asm/perf_regs.h>
>>  #undef perf_event_arm_regs
>>  #include "../../arch/arm64/util/unwind-libunwind.c"
>>
>