perf mem: invalid or unsupported event: 'cpu/mem-loads/pp'

perf mem: invalid or unsupported event: 'cpu/mem-loads/pp'

[Milian Wolff]

Hey there,

I just found perf mem in the output of perf help and wanted to try it:

$ perf mem record ls
invalid or unsupported event: 'cpu/mem-loads/pp'
Run 'perf list' for a list of valid events

 usage: perf record [<options>] [<command>]
 ...

Am I missing a kernel configuration? Or what is going on here?

Cheers
-- 
Milian Wolff
mail@milianw.de
http://milianw.de

Re: perf mem: invalid or unsupported event: 'cpu/mem-loads/pp'

[Michael Ellerman]

On Mon, 2013-07-22 at 19:34 +0200, Milian Wolff wrote:
> Hey there,
> 
> I just found perf mem in the output of perf help and wanted to try it:
> 
> $ perf mem record ls
> invalid or unsupported event: 'cpu/mem-loads/pp'
> Run 'perf list' for a list of valid events
> 
>  usage: perf record [<options>] [<command>]
>  ...
> 
> Am I missing a kernel configuration? Or what is going on here?

You need a kernel that has mem-loads in /sys/bus/event_source/devices/cpu/events

Assuming you're on x86 you'll need a 3.10 or later kernel.

cheers

Re: perf mem: invalid or unsupported event: 'cpu/mem-loads/pp'

[Milian Wolff]

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On Tuesday 23 July 2013 11:46:49 Michael Ellerman wrote:
> On Mon, 2013-07-22 at 19:34 +0200, Milian Wolff wrote:
> > Hey there,
> > 
> > I just found perf mem in the output of perf help and wanted to try it:
> > 
> > $ perf mem record ls
> > invalid or unsupported event: 'cpu/mem-loads/pp'
> > Run 'perf list' for a list of valid events
> > 
> >  usage: perf record [<options>] [<command>]
> >  ...
> > 
> > Am I missing a kernel configuration? Or what is going on here?
> 
> You need a kernel that has mem-loads in
> /sys/bus/event_source/devices/cpu/events
> 
> Assuming you're on x86 you'll need a 3.10 or later kernel.

Sorry for the long delay. I wanted to try it out again today, but I still get 
the same error message above. This is with a 4.0.5 kernel and perf 4.0.3.

What is required to get mem-loads in the path specified above?

Bye
-- 
Milian Wolff
mail@milianw.de
http://milianw.de

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