Re: [QUESTION] Performance deterioration caused by commit 85f726a35e504418

[Yang Jihong]

Hi, Steve and Tom

On 2021/10/20 2:38, Zanussi, Tom wrote:
> On 10/19/2021 1:10 PM, Steven Rostedt wrote:
> > On Tue, 19 Oct 2021 12:30:28 -0500
> > "Zanussi, Tom" <tom.zanussi@xxxxxxxxxxxxxxx> wrote:
> >
> > > So anyway, as far as the histograms go, I think optimizing the two
> > > changes in 85f726a35e504418 while ignoring trailing garbage can be done
> > > without affecting the histogram correctness.
> >
> > So, none of that is exported to user space?
>
> I meant just that any optimization of those two things that ignored the
> trailing garbage wouldn't affect the histogram keys.
>
> But yeah I think you're correct that ignoring it in the case of
> saved_cmdlines wouldn't be a problem either but it would be in the case of
> max_buffer since that's exported by the ring buffer.

OK. Thanks very much for your patience. :)

Kind regards,
Jihong
> Tom
>
> > -- Steve
> .