linux-kernel - Re: [PATCH v3 0/5] Support perf -vv

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Date:   Thu, 29 Mar 2018 15:49:18 +0800
From:   "Jin, Yao" <yao.jin@...ux.intel.com>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     acme@...nel.org, jolsa@...nel.org, peterz@...radead.org,
        mingo@...hat.com, alexander.shishkin@...ux.intel.com,
        Linux-kernel@...r.kernel.org, ak@...ux.intel.com,
        kan.liang@...el.com, yao.jin@...el.com
Subject: Re: [PATCH v3 0/5] Support perf -vv



On 3/29/2018 3:20 PM, Ingo Molnar wrote:
> 
> * Jin Yao <yao.jin@...ux.intel.com> wrote:
> 
>> For example:
>>
>> $ ./perf version --build-options
>>      or
>>    ./perf --version --build-options
>>      or
>>    ./perf -v --build-options
>>      or
>>    ./perf -vv
> 
> Thank you, the UI looks perfect to me!
> 
>> perf version 4.13.rc5.g4c1df1
>>                   dwarf: [ on  ]
>>      dwarf_getlocations: [ on  ]
>>                   glibc: [ on  ]
>>                    gtk2: [ on  ]
>>                libaudit: [ OFF ]
>>                  libbfd: [ on  ]
>>                  libelf: [ on  ]
>>                 libnuma: [ on  ]
>> numa_num_possible_cpus: [ on  ]
>>                 libperl: [ on  ]
>>               libpython: [ on  ]
>>                libslang: [ on  ]
>>               libcrypto: [ on  ]
>>               libunwind: [ on  ]
>>      libdw-dwarf-unwind: [ on  ]
>>                    zlib: [ on  ]
>>                    lzma: [ on  ]
>>               get_cpuid: [ on  ]
>>                     bpf: [ on  ]
> 
> ... and it's a nice touch that this is now printed in color, like the perf build
> system does.
> 

Yes, the printing is in color yet. Green for [on] and red for [OFF]. :)

> BTW., perhaps it would be nice to also print the macro name that is used within
> the sources:
> 
>                    dwarf: [ on  ]    # HAVE_DWARF_SUPPORT
>       dwarf_getlocations: [ on  ]    # HAVE_DWARF_GETLOCATIONS
>                    glibc: [ on  ]    # HAVE_GLIBC_SUPPORT
>                     gtk2: [ on  ]    # HAVE_GTK2_SUPPORT
>                 libaudit: [ OFF ]    # HAVE_LIBAUDIT_SUPPORT
> 	...
> 
> ?
> 
> That would make it easier to grep around in the source looking for where code
> related a particular features is located.
> 

Good idea, thanks! I will support it in v4.

> BTW. #2: to the compulsive perfectionist in me "HAVE_DWARF_GETLOCATIONS" is now
> sticking out like a sore thumb: it's the only library flag left that doesn't have
> the _SUPPORT suffix. Rename it to HAVE_DWARF_GETLOCATIONS_SUPPORT perhaps?
>
 > Thanks,
 >
 > 	Ingo
 >

OK, I will rename it to HAVE_DWARF_GETLOCATIONS_SUPPORT in v4.

Thanks
Jin Yao