From: Matthew Wilcox <willy@infradead.org>
To: Timofey Titovets <timofey.titovets@synesis.ru>
Cc: linux-kernel@vger.kernel.org,
Timofey Titovets <nefelim4ag@gmail.com>,
linux-mm@kvack.org, linux-doc@vger.kernel.org
Subject: Re: [PATCH V3] KSM: allow dedup all tasks memory
Date: Mon, 12 Nov 2018 17:49:28 -0800 [thread overview]
Message-ID: <20181113014928.GH21824@bombadil.infradead.org> (raw)
In-Reply-To: <20181112231344.7161-1-timofey.titovets@synesis.ru>
On Tue, Nov 13, 2018 at 02:13:44AM +0300, Timofey Titovets wrote:
> Some numbers from different not madvised workloads.
> Formulas:
> Percentage ratio = (pages_sharing - pages_shared)/pages_unshared
> Memory saved = (pages_sharing - pages_shared)*4/1024 MiB
> Memory used = free -h
>
> * Name: My working laptop
> Description: Many different chrome/electron apps + KDE
> Ratio: 5%
> Saved: ~100 MiB
> Used: ~2000 MiB
Your _laptop_ saves 100MB of RAM? That's extraordinary. Essentially
that's like getting an extra 100MB of page cache for free. Is there
any observable slowdown? I could even see there being a speedup (due
to your working set being allowed to be 5% larger)
I am now a big fan of this patch and shall try to give it the review
that it deserves.
next prev parent reply other threads:[~2018-11-13 1:49 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-12 23:13 [PATCH V3] KSM: allow dedup all tasks memory Timofey Titovets
2018-11-13 1:49 ` Matthew Wilcox [this message]
2018-11-13 11:25 ` Timofey Titovets
2018-11-13 2:25 ` Pavel Tatashin
2018-11-13 11:40 ` Timofey Titovets
2018-11-13 18:42 ` Pavel Tatashin
2018-11-13 22:55 ` Timofey Titovets
2018-11-13 11:57 ` Jann Horn
2018-11-13 12:58 ` Timofey Titovets
2018-11-13 13:25 ` Jann Horn
[not found] <<CAG48ez0ZprqUYGZFxcrY6U3Dnwt77q1NJXzzpsn1XNkRuXVppw@mail.gmail.com>
2018-11-13 14:23 ` Oleksandr Natalenko
2018-11-13 17:59 ` Pavel Tatashin
2018-11-13 18:17 ` Timofey Titovets
2018-11-13 18:35 ` Pavel Tatashin
2018-11-13 18:54 ` Timofey Titovets
2018-11-13 19:16 ` Pavel Tatashin
2018-11-13 22:40 ` Timofey Titovets
2018-11-13 22:53 ` Pavel Tatashin
2018-11-13 23:07 ` Timofey Titovets
2018-11-13 20:26 ` Jann Horn
2018-11-13 22:35 ` Pavel Tatashin
[not found] <<20181112231344.7161-1-timofey.titovets@synesis.ru>
2018-11-13 11:06 ` Oleksandr Natalenko
2018-11-13 11:56 ` Timofey Titovets
2018-11-13 16:33 ` Oleksandr Natalenko
2018-11-13 17:10 ` Timofey Titovets
2018-11-13 17:27 ` Oleksandr Natalenko
2018-11-13 17:44 ` Timofey Titovets
2018-11-13 18:20 Timofey Titovets
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