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Re: [PATCH] perf, tools, script: Allow adding and removing fields

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On Mon, May 08, 2017 at 09:21:34AM -0700, Andi Kleen wrote:
> From: Andi Kleen <ak@linux.intel.com>
> 
> With perf script it is common that we just want to add or remove a field.
> Currently this requires figuring out the long list of default fields and
> specifying them first, and then adding/removing the new field.
> 
> This patch adds a new + - syntax to merely add or remove fields,
> that allows more succint and clearer command lines
> 
> For example to remove the comm field from PMU samples:
> 
> Previously
> 
> perf script -F tid,cpu,time,event,sym,ip,dso,period
> 	    0 [000] 504345.383126:          1 cycles:  ffffffff90060c66 native_write_msr ([kernel.kallsyms])
> 
> with the new syntax
> 
> perf script -F -comm
> 	    0 [000] 504345.383126:          1 cycles:  ffffffff90060c66 native_write_msr ([kernel.kallsyms])
> 
> The new syntax cannot be mixed with normal overriding.

so the -F option for 'type:' does not have default set,
and it looks like the +- don't make sense there:

[jolsa@krava perf]$ ./perf script -F hw:+comm | head -3
              ex 
              ex 
              ex 


jirka

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[PATCH] perf, tools, script: Allow adding and removing fields Andi Kleen <andi@firstfloor.org> - 2017-05-08 18:30 +0200
  Re: [PATCH] perf, tools, script: Allow adding and removing fields Jiri Olsa <jolsa@redhat.com> - 2017-05-09 14:30 +0200
    Re: [PATCH] perf, tools, script: Allow adding and removing fields Andi Kleen <ak@linux.intel.com> - 2017-05-09 14:40 +0200
      Re: [PATCH] perf, tools, script: Allow adding and removing fields Jiri Olsa <jolsa@redhat.com> - 2017-05-09 15:50 +0200
        Re: [PATCH] perf, tools, script: Allow adding and removing fields Andi Kleen <andi@firstfloor.org> - 2017-05-09 16:40 +0200

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