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Wed, 29 Jan 2020 19:36:19 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 73AB5305FB6; Wed, 29 Jan 2020 20:34:33 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 5B3702B7337BB; Wed, 29 Jan 2020 20:36:16 +0100 (CET) Date: Wed, 29 Jan 2020 20:36:16 +0100 From: Peter Zijlstra To: SeongJae Park Cc: sjpark@amazon.com, akpm@linux-foundation.org, SeongJae Park , acme@kernel.org, amit@kernel.org, brendan.d.gregg@gmail.com, corbet@lwn.net, dwmw@amazon.com, mgorman@suse.de, rostedt@goodmis.org, kirill@shutemov.name, brendanhiggins@google.com, colin.king@canonical.com, minchan@kernel.org, vdavydov.dev@gmail.com, vdavydov@parallels.com, linux-mm@kvack.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, Ingo Molnar , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim Subject: Re: Re: Re: Re: [PATCH v2 0/9] Introduce Data Access MONitor (DAMON) Message-ID: <20200129193616.GT14914@hirez.programming.kicks-ass.net> References: <20200129180709.GS14879@hirez.programming.kicks-ass.net> <20200129190645.2137-1-sj38.park@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200129190645.2137-1-sj38.park@gmail.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Wed, Jan 29, 2020 at 08:06:45PM +0100, SeongJae Park wrote: > > Perf can do address based sampling of memops, I suspect you can create > > something using that. > > If you're saying implementing DAMON in 'perf mem', I think it would conflict > with abovely explained DAMON's goal. > > Else, if you're saying it would be the right place to handle the DAMON > generated data, I agree, thank you for pointing me that. Will keep it in mind > while shaping the interface of DAMON. I'm saying it might be able to provide the data you need; without damon. Might; because I'm not entirely sure what you're looking for, nor exactly what events we have that provide address information.