linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Konstantin Kharlamov <hi-angel@yandex.ru>
To: Yu Zhao <yuzhao@google.com>, linux-mm@kvack.org
Cc: Alex Shi <alexs@kernel.org>, Andi Kleen <ak@linux.intel.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Benjamin Manes <ben.manes@gmail.com>,
	Dave Chinner <david@fromorbit.com>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	Hillf Danton <hdanton@sina.com>, Jens Axboe <axboe@kernel.dk>,
	Johannes Weiner <hannes@cmpxchg.org>,
	Jonathan Corbet <corbet@lwn.net>,
	Joonsoo Kim <iamjoonsoo.kim@lge.com>,
	Matthew Wilcox <willy@infradead.org>,
	Mel Gorman <mgorman@suse.de>, Miaohe Lin <linmiaohe@huawei.com>,
	Michael Larabel <michael@michaellarabel.com>,
	Michal Hocko <mhocko@suse.com>,
	Michel Lespinasse <michel@lespinasse.org>,
	Rik van Riel <riel@surriel.com>, Roman Gushchin <guro@fb.com>,
	Rong Chen <rong.a.chen@intel.com>,
	SeongJae Park <sjpark@amazon.de>,
	Tim Chen <tim.c.chen@linux.intel.com>,
	Vlastimil Babka <vbabka@suse.cz>, Yang Shi <shy828301@gmail.com>,
	Ying Huang <ying.huang@intel.com>, Zi Yan <ziy@nvidia.com>,
	linux-kernel@vger.kernel.org, lkp@lists.01.org,
	page-reclaim@google.com
Subject: Re: [PATCH v2 00/16] Multigenerational LRU Framework
Date: Fri, 30 Apr 2021 09:37:58 +0300	[thread overview]
Message-ID: <8ce5be3df2137e975d7333024b6120b71b214617.camel@yandex.ru> (raw)
In-Reply-To: <140226722f2032c86301fbd326d91baefe3d7d23.camel@yandex.ru>

Btw, I noticed a fun thing, an improvement. I don't know yet if it can be
attributed to 5.12 (which I didn't try alone yet) or to the LRU patchset, but
I'd assume the latter, because 5.12 seems didn't to have had anything
interesting regarding memory performance¹.

I usually have Skype running in background for work purposes, which is only used
2-3 times in a week. So one would expect it to be one the first victims to
memory reclaim. Unfortunately, I never seen this to actually happen (till now,
that is): all skypeforlinux processes routinely have 0 bytes in SWAP, and the
only circumstances under which its processes can get into SWAP is after
experiencing many SWAP-storms. It was so hard for the kernel to move these
unused processes to SWAP that at some point I even tried to research if there
are any odd flags a userspace may have set on a process to keep it in RAM, just
in case that's what happens to Skype (A: no, that wasn't the case, running Skype
in a memory limited cgroup makes it swap. It's just that kernel decision were
lacking for some reason).

So, anyway, I am delighted to see now that while testing this patchset, and
without encountering even a single SWAP-storm yet, skypeforlinux are one of the
processes residing in SWAP!!

     λ smem -kc "name user pid pss swap" | grep skype    
    skypeforlinux            constantine  1151    60.0K     7.5M 
    skypeforlinux            constantine  1215   195.0K     8.1M 
    skypeforlinux            constantine  1149   706.0K     7.5M 
    skypeforlinux            constantine  1148   743.0K     7.3M 
    skypeforlinux            constantine  1307     1.4M     8.0M 
    skypeforlinux            constantine  1213     2.1M    46.1M 
    skypeforlinux            constantine  1206    14.0M    10.8M 
    skypeforlinux            constantine   818    38.5M    34.3M 
    skypeforlinux            constantine  1242   103.2M    46.8M 

!!!

1: https://kernelnewbies.org/Linux_5.12#Memory_management

On Fri, 2021-04-30 at 02:46 +0300, Konstantin Kharlamov wrote:
> In case you need it yet, this series is:
> 
> Tested-by: Konstantin Kharlamov <Hi-Angel@yandex.ru>
> 
> My success story: I have Archlinux with 8G RAM + zswap + swap. While developing,
> I have lots of apps opened such as multiple LSP-servers for different langs,
> chats, two browsers, etc… Usually, my system gets quickly to a point of SWAP-
> storms, where I have to kill LSP-servers, restart browsers to free memory, etc,
> otherwise the system lags heavily and is barely usable.
> 
> 1.5 day ago I migrated from 5.11.15 kernel to 5.12 + the LRU patchset, and I
> started up by opening lots of apps to create memory pressure, and worked for a
> day like this. Till now I had *not a single SWAP-storm*, and mind you I got 3.4G
> in SWAP. I was never getting to the point of 3G in SWAP before without a single
> SWAP-storm.
> 
> Right now my gf on Fedora 33 also suffers from SWAP-storms on her old Macbook
> 2013 with 4G RAM + zswap + swap, I think the next week I'll build for her 5.12 +
> LRU patchset as well. Will see how it goes, I expect it will improve her
> experience by a lot too.
> 
> P.S.: upon replying please keep me CCed, I'm not subscribed to the list


  reply	other threads:[~2021-04-30  6:47 UTC|newest]

Thread overview: 57+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-13  6:56 Yu Zhao
2021-04-13  6:56 ` [PATCH v2 01/16] include/linux/memcontrol.h: do not warn in page_memcg_rcu() if !CONFIG_MEMCG Yu Zhao
2021-04-13  6:56 ` [PATCH v2 02/16] include/linux/nodemask.h: define next_memory_node() if !CONFIG_NUMA Yu Zhao
2021-04-13  6:56 ` [PATCH v2 03/16] include/linux/huge_mm.h: define is_huge_zero_pmd() if !CONFIG_TRANSPARENT_HUGEPAGE Yu Zhao
2021-04-13  6:56 ` [PATCH v2 04/16] include/linux/cgroup.h: export cgroup_mutex Yu Zhao
2021-04-13  6:56 ` [PATCH v2 05/16] mm/swap.c: export activate_page() Yu Zhao
2021-04-13  6:56 ` [PATCH v2 06/16] mm, x86: support the access bit on non-leaf PMD entries Yu Zhao
2021-04-13  6:56 ` [PATCH v2 07/16] mm/vmscan.c: refactor shrink_node() Yu Zhao
2021-04-13  6:56 ` [PATCH v2 08/16] mm: multigenerational lru: groundwork Yu Zhao
2021-04-13  6:56 ` [PATCH v2 09/16] mm: multigenerational lru: activation Yu Zhao
2021-04-13  6:56 ` [PATCH v2 10/16] mm: multigenerational lru: mm_struct list Yu Zhao
2021-04-14 14:36   ` Matthew Wilcox
2021-04-13  6:56 ` [PATCH v2 11/16] mm: multigenerational lru: aging Yu Zhao
2021-04-13  6:56 ` [PATCH v2 12/16] mm: multigenerational lru: eviction Yu Zhao
2021-04-13  6:56 ` [PATCH v2 13/16] mm: multigenerational lru: page reclaim Yu Zhao
2021-04-13  6:56 ` [PATCH v2 14/16] mm: multigenerational lru: user interface Yu Zhao
2021-04-13  6:56 ` [PATCH v2 15/16] mm: multigenerational lru: Kconfig Yu Zhao
2021-04-13  6:56 ` [PATCH v2 16/16] mm: multigenerational lru: documentation Yu Zhao
2021-04-13  7:51 ` [PATCH v2 00/16] Multigenerational LRU Framework SeongJae Park
2021-04-13 16:13   ` Jens Axboe
2021-04-13 16:42     ` SeongJae Park
2021-04-13 23:14     ` Dave Chinner
2021-04-14  2:29       ` Rik van Riel
     [not found]         ` <CAOUHufafMcaG8sOS=1YMy2P_6p0R1FzP16bCwpUau7g1-PybBQ@mail.gmail.com>
2021-04-14  6:15           ` Huang, Ying
2021-04-14  7:58             ` Yu Zhao
2021-04-14  8:27               ` Huang, Ying
2021-04-14 13:51                 ` Rik van Riel
2021-04-14 15:56                   ` Andi Kleen
2021-04-14 15:58                   ` [page-reclaim] " Shakeel Butt
2021-04-14 18:45                   ` Yu Zhao
2021-04-14 15:51           ` Andi Kleen
2021-04-14 15:58             ` Rik van Riel
2021-04-14 19:14               ` Yu Zhao
2021-04-14 19:41                 ` Rik van Riel
2021-04-14 20:08                   ` Yu Zhao
2021-04-14 19:04             ` Yu Zhao
2021-04-15  3:00               ` Andi Kleen
2021-04-15  7:13                 ` Yu Zhao
2021-04-15  8:19                   ` Huang, Ying
2021-04-15  9:57                   ` Michel Lespinasse
2021-04-24  2:33                     ` Yu Zhao
2021-04-24  3:30                       ` Andi Kleen
2021-04-24  4:16                         ` Yu Zhao
2021-04-14  3:40       ` Yu Zhao
2021-04-14  4:50         ` Dave Chinner
2021-04-14  7:16           ` Yu Zhao
2021-04-14 10:00             ` Yu Zhao
2021-04-15  1:36             ` Dave Chinner
2021-04-24 21:21               ` Yu Zhao
2021-04-14 14:43       ` Jens Axboe
2021-04-14 19:42         ` Yu Zhao
2021-04-15  1:21         ` Dave Chinner
2021-04-14 17:43 ` Johannes Weiner
2021-04-27 10:35   ` Yu Zhao
2021-04-29 23:46 ` Konstantin Kharlamov
2021-04-30  6:37   ` Konstantin Kharlamov [this message]
2021-04-30 19:31     ` Yu Zhao

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=8ce5be3df2137e975d7333024b6120b71b214617.camel@yandex.ru \
    --to=hi-angel@yandex.ru \
    --cc=ak@linux.intel.com \
    --cc=akpm@linux-foundation.org \
    --cc=alexs@kernel.org \
    --cc=axboe@kernel.dk \
    --cc=ben.manes@gmail.com \
    --cc=corbet@lwn.net \
    --cc=dave.hansen@linux.intel.com \
    --cc=david@fromorbit.com \
    --cc=guro@fb.com \
    --cc=hannes@cmpxchg.org \
    --cc=hdanton@sina.com \
    --cc=iamjoonsoo.kim@lge.com \
    --cc=linmiaohe@huawei.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --cc=lkp@lists.01.org \
    --cc=mgorman@suse.de \
    --cc=mhocko@suse.com \
    --cc=michael@michaellarabel.com \
    --cc=michel@lespinasse.org \
    --cc=page-reclaim@google.com \
    --cc=riel@surriel.com \
    --cc=rong.a.chen@intel.com \
    --cc=shy828301@gmail.com \
    --cc=sjpark@amazon.de \
    --cc=tim.c.chen@linux.intel.com \
    --cc=vbabka@suse.cz \
    --cc=willy@infradead.org \
    --cc=ying.huang@intel.com \
    --cc=yuzhao@google.com \
    --cc=ziy@nvidia.com \
    --subject='Re: [PATCH v2 00/16] Multigenerational LRU Framework' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).