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Re: AutoFDO profile toolchain is open-sourced


In that case, we should get quipper fixed upstream to accommodate new
format. (Maybe they already fixed it, I will do a batch sync to make
quipper up-to-date).

Dehao

On Tue, Apr 21, 2015 at 10:24 AM, Andi Kleen <andi@firstfloor.org> wrote:
>> > BTW the biggest problem with autofdo currently is that it is
>> > quite bitrotten and supports only several years old perf.
>> > So all of this above will only work with old distributions,
>> > unless you compile an old perf utility first.
>>
>> Do you mean newer perf does not support LBR (-b) any more?
>
> No.
>
> perf extended its perf.data output format, and quipper cannot parse
> any of the extensions, so it just bombs out with assertation
> failures.
>
> I have a patch to hack around some of this, but still
> couldn't get it actually to work so far.
>
> -Andi
> --
> ak@linux.intel.com -- Speaking for myself only.


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