Re: [PATCH 2/6] perf, tools, stat: Implement CSV metrics output

[Andi Kleen]

> Where before it wasn't there:
> 
> cat /tmp/before
> 0.282628,,task-clock,282628,100.00
> 1,,context-switches,282628,100.00
> 0,,cpu-migrations,282628,100.00
> 52,,page-faults,282628,100.00
> 861213,,cycles,285354,100.00
> <not supported>,,stalled-cycles-frontend,0,100.00
> <not supported>,,stalled-cycles-backend,0,100.00
> 686082,,instructions,285354,100.00
> 137846,,branches,285354,100.00
> 7142,,branch-misses,285354,100.00

This is intentional. See the standard perf output:


          521,232      instructions              #    0.63  insns per cycle        
                                                 #    1.13  stalled cycles per insn

So this line has multiple metrics. In CSV this is expressed as a mostly empty line.

-Andi