linux-kernel - Re: [PATCH v2 4/4] perf: Support perf -vv

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Date:   Thu, 29 Mar 2018 08:52:32 +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 v2 4/4] perf: Support perf -vv



On 3/28/2018 11:46 PM, Ingo Molnar wrote:
> 
> * Jin Yao <yao.jin@...ux.intel.com> wrote:
> 
>> $ ./perf -vv or ./perf -version --build-options
>> perf version 4.13.rc5.gcb1183
> 
> My suggestion was to add the 'version' subcommand like Git has, not a "-version"
> option:
> 
>    $ git version
>    git version 2.14.1
> 
> Thanks,
> 
> 	Ingo
> 

Hi Ingo,

Sorry about that. Actually I find it's a bug in my patch. The 'perf 
-vxyz' is mapped to 'perf --version' mistakenly. So 'perf -version' will 
be mapped to 'perf --version' and 'perf -vabc' will be mapped too.

I will fix this bug.

Currently, 'perf -v', 'perf version' and 'perf --version' have the same 
behavior.

So I will let:
'perf -v --build-options',
'perf version --build-options',
'perf --version --build-options',
'perf -vv'
have same output.

For example,

$ ./perf version --build-options
perf version 4.13.rc5.gcb1183
                  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  ]

Thanks
Jin Yao