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SubjectRe: [PATCHSET 00/17] perf report: Add -F option for specifying output fields (v4)
Hi Don,

On Tue, 22 Apr 2014 17:16:47 -0400, Don Zickus wrote:
> On Wed, Apr 16, 2014 at 12:05:37PM +0900, Namhyung Kim wrote:
>> Hello,
>> This is a patchset implementing -F/--fields option to setup output
>> field/column as Ingo requested. It depends on my --percentage
>> patchset [1].
>> The -F option can receive any sort keys that -s option recognize, plus
>> following fields (name can be changed):
>> overhead, overhead_sys, overhead_us, sample, period
>> The overhead_guest_sys and overhead_guest_us might be avaiable when
>> you profile guest machines.
>> Output will be sorted by in order of fields and sort keys passed by -s
>> option will be added to the output field list automatically. If you
>> want to change the order of sorting you can give -s option in addition
>> to -F option. To support old behavior, it'll also prepend 'overhead'
>> field to the sort keys unless you give -F option explicitly.
> So I am struggling a little bit to get this working correctly. I had it
> in my head that I could sort internally with -s and re-sort the output
> based on -F, but it doesn't seem to be working that way.

Hmm.. probably it's me miss something on perf mem side.. I don't have
an access to a machine to test it now.

> For example with
> ./perf mem record -a grep -r foo /* > /dev/null
> ./perf mem report -F overhead,symbol_daddr,pid -s symbol_daddr,pid --stdio
> I was thinking I could sort everything based on the symbol_daddr and pid.
> Then re-sort the output to display the highest 'symbol_daddr,pid' pair.
> But it didn't seem to work that way. Instead it seems like I get the
> original sort just displayed in the -F format.

Could you please show me the output of your example?


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