LKML Archive on lore.kernel.org
 help / color / Atom feed
From: Pavel Tatashin <pasha.tatashin@soleen.com>
To: Alexander Duyck <alexander.h.duyck@linux.intel.com>,
	daniel.m.jordan@oracle.com
Cc: akpm@linux-foundation.org, linux-mm@kvack.org,
	sparclinux@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-nvdimm@lists.01.org, davem@davemloft.net,
	pavel.tatashin@microsoft.com, mhocko@suse.com, mingo@kernel.org,
	kirill.shutemov@linux.intel.com, dan.j.williams@intel.com,
	dave.jiang@intel.com, rppt@linux.vnet.ibm.com,
	willy@infradead.org, vbabka@suse.cz, khalid.aziz@oracle.com,
	ldufour@linux.vnet.ibm.com, mgorman@techsingularity.net,
	yi.z.zhang@linux.intel.com
Subject: Re: [mm PATCH v5 0/7] Deferred page init improvements
Date: Fri, 9 Nov 2018 16:15:21 -0500
Message-ID: <20181109211521.5ospn33pp552k2xv@xakep.localdomain> (raw)
In-Reply-To: <154145268025.30046.11742652345962594283.stgit@ahduyck-desk1.jf.intel.com>

On 18-11-05 13:19:25, Alexander Duyck wrote:
> This patchset is essentially a refactor of the page initialization logic
> that is meant to provide for better code reuse while providing a
> significant improvement in deferred page initialization performance.
> 
> In my testing on an x86_64 system with 384GB of RAM and 3TB of persistent
> memory per node I have seen the following. In the case of regular memory
> initialization the deferred init time was decreased from 3.75s to 1.06s on
> average. For the persistent memory the initialization time dropped from
> 24.17s to 19.12s on average. This amounts to a 253% improvement for the
> deferred memory initialization performance, and a 26% improvement in the
> persistent memory initialization performance.

Hi Alex,

Please try to run your persistent memory init experiment with Daniel's
patches:

https://lore.kernel.org/lkml/20181105165558.11698-1-daniel.m.jordan@oracle.com/

The performance should improve by much more than 26%.

Overall, your works looks good, but it needs to be considered how easy it will be
to merge with ktask. I will try to complete the review today.

Thank you,
Pasha

  parent reply index

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-05 21:19 Alexander Duyck
2018-11-05 21:19 ` [mm PATCH v5 1/7] mm: Use mm_zero_struct_page from SPARC on all 64b architectures Alexander Duyck
2018-11-05 21:19 ` [mm PATCH v5 2/7] mm: Drop meminit_pfn_in_nid as it is redundant Alexander Duyck
2018-11-05 21:19 ` [mm PATCH v5 3/7] mm: Implement new zone specific memblock iterator Alexander Duyck
2018-11-09 23:26   ` Pavel Tatashin
2018-11-09 23:58     ` Alexander Duyck
2018-11-10  0:11       ` Pavel Tatashin
2018-11-05 21:19 ` [mm PATCH v5 4/7] mm: Initialize MAX_ORDER_NR_PAGES at a time instead of doing larger sections Alexander Duyck
2018-11-10  1:02   ` Pavel Tatashin
2018-11-19 18:53     ` Alexander Duyck
2018-11-05 21:19 ` [mm PATCH v5 5/7] mm: Move hot-plug specific memory init into separate functions and optimize Alexander Duyck
2018-11-10  2:07   ` Pavel Tatashin
2018-11-05 21:19 ` [mm PATCH v5 6/7] mm: Add reserved flag setting to set_page_links Alexander Duyck
2018-11-10  2:11   ` Pavel Tatashin
2018-11-05 21:20 ` [mm PATCH v5 7/7] mm: Use common iterator for deferred_init_pages and deferred_free_pages Alexander Duyck
2018-11-10  4:13   ` Pavel Tatashin
2018-11-12 15:12     ` Alexander Duyck
2018-11-09 21:15 ` Pavel Tatashin [this message]
2018-11-09 23:14   ` [mm PATCH v5 0/7] Deferred page init improvements Alexander Duyck
2018-11-10  0:00     ` Pavel Tatashin
2018-11-10  0:46       ` Alexander Duyck
2018-11-10  1:16         ` Pavel Tatashin
2018-11-12 19:10           ` Alexander Duyck
2018-11-12 20:37             ` Pavel Tatashin
2018-11-12 16:25       ` Daniel Jordan
2018-11-14 15:07 ` Michal Hocko
2018-11-14 19:12   ` Pavel Tatashin
2018-11-14 21:35     ` Michal Hocko
2018-11-15  0:50   ` Alexander Duyck
2018-11-15  1:55     ` Mike Rapoport
2018-11-15 19:09       ` Mike Rapoport
2018-11-15  8:10     ` Michal Hocko
2018-11-15 16:02       ` Alexander Duyck
2018-11-15 16:40         ` Michal Hocko

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=20181109211521.5ospn33pp552k2xv@xakep.localdomain \
    --to=pasha.tatashin@soleen.com \
    --cc=akpm@linux-foundation.org \
    --cc=alexander.h.duyck@linux.intel.com \
    --cc=dan.j.williams@intel.com \
    --cc=daniel.m.jordan@oracle.com \
    --cc=dave.jiang@intel.com \
    --cc=davem@davemloft.net \
    --cc=khalid.aziz@oracle.com \
    --cc=kirill.shutemov@linux.intel.com \
    --cc=ldufour@linux.vnet.ibm.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --cc=linux-nvdimm@lists.01.org \
    --cc=mgorman@techsingularity.net \
    --cc=mhocko@suse.com \
    --cc=mingo@kernel.org \
    --cc=pavel.tatashin@microsoft.com \
    --cc=rppt@linux.vnet.ibm.com \
    --cc=sparclinux@vger.kernel.org \
    --cc=vbabka@suse.cz \
    --cc=willy@infradead.org \
    --cc=yi.z.zhang@linux.intel.com \
    /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

LKML Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/lkml/0 lkml/git/0.git
	git clone --mirror https://lore.kernel.org/lkml/1 lkml/git/1.git
	git clone --mirror https://lore.kernel.org/lkml/2 lkml/git/2.git
	git clone --mirror https://lore.kernel.org/lkml/3 lkml/git/3.git
	git clone --mirror https://lore.kernel.org/lkml/4 lkml/git/4.git
	git clone --mirror https://lore.kernel.org/lkml/5 lkml/git/5.git
	git clone --mirror https://lore.kernel.org/lkml/6 lkml/git/6.git
	git clone --mirror https://lore.kernel.org/lkml/7 lkml/git/7.git
	git clone --mirror https://lore.kernel.org/lkml/8 lkml/git/8.git
	git clone --mirror https://lore.kernel.org/lkml/9 lkml/git/9.git
	git clone --mirror https://lore.kernel.org/lkml/10 lkml/git/10.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 lkml lkml/ https://lore.kernel.org/lkml \
		linux-kernel@vger.kernel.org
	public-inbox-index lkml

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-kernel


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git