Re: Re: [PATCH 0/8] Introduce Data Access MONitor (DAMON)

[SeongJae Park]

On Mon, 20 Jan 2020 19:55:51 +0300 "Kirill A. Shutemov" <kirill@xxxxxxxxxxxxx> wrote:

> On Mon, Jan 20, 2020 at 05:27:49PM +0100, SeongJae Park wrote:
> > This patchset introduces a new kernel module for practical monitoring of
> > data accesses, namely DAMON.
> 
> Looks like it's not integrated with perf at all right? Why?
> Correlating measurements from different domains would help to see the
> bigger picture.

Right, it's not integrated with perf.  DAMON provides only its debugfs
interface.  Also I agree that correlating measurments will be helpful.  I do
not integrate DAMON with perf with this patchset for following reasons.

First of all, I think I have no deep understanding of perf, yet.  Partly for
the reason, I couldn't figure out the best way to integrate DAMON with perf.
Especially, I couldn't straightforwardly classify DAMON providing information
into one of the categories of the perf events I know.

Therefore, rather than integrating DAMON with perf in my arguable way and
increasing the complexity of the code, I decided to keep the interface as
simple and flexible as it can be for the first stage.  That said, I believe it
would be not too hard to integrate DAMON with perf in a future.


Thanks,
SeongJae Park

> 
> -- 
>  Kirill A. Shutemov
> 
>