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Maintaining DAMON (https://damonitor.github.io). All opinions are my own.
sj

sj

I just received an acceptance notification of my DAMON presentation proposal[1] for FOSDEM'25[2]. Looking forward to meet you at Brussels!

[1] https://pretalx.fosdem.org/fosdem-2025/talk/review/3UT9TYYRE3UXJMRRCRLMQLJKUHLRKVYE
[2] https://fosdem.org/2025/

#linux #kernel #damon #fosdem25
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kernellogger@fosstodon.org

Thorsten Leemhuis (acct. 1/4)

Greg now officially deemed 6.12 as a longterm by adding it to https://www.kernel.org/category/releases.html right after marking 4.19 as EOL; ohh, and he marked the 6.11 series as EOL today, too!

For details see the latest commits here: https://git.kernel.org/pub/scm/docs/kernel/website.git/log/

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sj

sj

On Middlewar'24, a paper describing DAMON as a common cloud workload and evaluate their system for DAMON usage has presented: https://dl.acm.org/doi/10.1145/3652892.3700755

This is yet another creative usage of DAMON that I never expected.

#linux #kernel #damon #middleware24
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sj

sj

Posted an example of the DAMON monitoring parameters tuning guide using my approach on a real-world server workload.

https://lore.kernel.org/20241202175459.2005526-1-sj@kernel.org

#linux #kernel #damon #damo

RE: https://social.kernel.org/objects/33dc6af6-20f2-49f3-bf50-8d0ca813c902
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sj

sj

Edited 23 days ago
damo v2.5.7 is released with filtering and formatting keyword for region access temperatures. Show blog post for detail of the features with examples[1].

[1] https://damonitor.github.io/posts/damo_2_5_7_features/

#linux #kernel #damon #damo
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vbabka

Since the report of 3888.9% performance improvement made it not only to Phoronix (no surprises there) but is now also the subject of at least two youtube videos, where one has 212k views at this point (just wow), I've decided to explain in some detail why the benchmark is in this context completely bogus, and that people missed the very same report also contains a 9% regression in another benchmark (which may be actually less bogus :)
Hope someone finds this useful. http://lore.kernel.org/all/3b09bf98-9bd4-465b-b9c5-5483a6261dc7%40suse.cz
The youtube videos: https://www.youtube.com/watch?v=m9dZkRwWEj8
https://youtu.be/OvLEx6fPVrg
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sj

sj

Just implemented heatmap visualization for each DAMON's access pattern snapshot. It is inpsired by Lorenzo's page layout idea[1].

Someone might be able to hack DAMON for generating page types snapshot instead of access pattern snapshot, and reuse some of the heatmap visualization code, if they are getting bored and get plenty spare time ;)

[1] https://social.kernel.org/notice/Ao0id4tH8kLlNztK0u

#linux #kernel #damon #damo
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sj

sj

Reply to @ljs
@ljs @jann re: real time physical memory layout, I replied to @ljs via mail, but TL; DR: No. But if no real page granularity is required, I think we can make a fun hack using DAMON's adaptive regions adjustment mechanism[1].

[1] https://docs.kernel.org/mm/damon/design.html#adaptive-regions-adjustment
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sj

sj

Posted "a guide to DAMON tuning and results interpretation for hot pages" to mailing lists[1]. Hopefully this will help better tuning of DAMON for given purposes. Cross-posted it to the blog[2] too, for people who prefer rendered page, and possible future revisions.

[1] https://lore.kernel.org/20241108232536.73843-1-sj@kernel.org
[2] https://damonitor.github.io/posts/damon_tuning_guide_for_hot_pages/

#linux #kernel #damon #hotpage_detection #tuning #guide
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sj

sj

Just released damo v2.5.4[1]. The major new feature in this release is recency/temperature histogram visualization[2] of DAMON's access pattern snapshots.

[1] https://github.com/damonitor/damo/blob/v2.5.4/release_note#L4
[2] https://github.com/damonitor/damo/blob/v2.5.4/USAGE.md#access-report-styles

#linux #kernel #damon #damo
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sj

sj

I'm still looking for a space on `damo` USAGE.md[1] for a formal documentation of DAMOS auto-tuning usage. Because I'm only continue failing it everyday, just wrote a blog post for an informal usage of it with examples: https://damonitor.github.io/posts/damo_autotune_example/

[1] https://github.com/damonitor/damo/blob/next/USAGE.md

#linux #kernel #damon #damo #damos #auto-tuning
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vbabka

Edited 1 month ago
kernel job posting
Show content
The core kernel team at SUSE Labs (where I am as well) is looking for a Linux Kernel Security Expert! https://jobs.suse.com/us/en/job/71006364
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karen@floss.social

Karen Sandler

Edited 4 months ago

Outreachy is getting squeezed financially from reduced funding related to diversity programs and reduced funding for open source orgs. Can you help us spread the word about how important the program is and help us connect to folks who might contribute funding?

https://www.outreachy.org/blog/2024-08-14/outreachy-needs-your-help/

@outreachy

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sj

Just realized the new member looks similar to the penguin of FB kernel team logo hat I found from https://opensource.fb.com/linux/ (file name: kernel-team-logo.svg)

RE: https://social.kernel.org/objects/11adc48b-1b76-4d76-8e86-c6c89d87d895
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stgraber@hachyderm.io

Stéphane Graber

The CFP for the Containers devroom at @fosdem 2025 is now open! https://discuss.linuxcontainers.org/t/fosdem-2025-containers-devroom-call-for-papers/21956

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geert@society.oftrolls.com

Geert Uytterhoeven

Thanks @jejb for restoring sanity!

https://lore.kernel.org/all/e7d548a7fc835f9f3c9cb2e5ed97dfdfa164813f.camel@HansenPartnership.com/

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sj

sj

Reply to @ljs
@ljs I'm glad that my script helped you in some way :)
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LWN@fosstodon.org

LWN.net

Several Russian developers lose kernel maintainership status

https://lwn.net/Articles/995186/

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sj

sj

The bubble is not popped yet. The 30-days PyPI downloads of 'damo' has doubled (8,000 -> 16,000) again, about ten days after the last doubling.

#linux #kernel #damon #damo #pypistats

RE: https://social.kernel.org/objects/d7273398-9f50-43bc-97c8-14673a13d783
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sj

Edited 1 month ago
DAMON project site's main page (https://damonitor.github.io) was redirecting[1] to a personal blog post, with its hidden real main page[2]. Now DAMON has its own project blog, and does not redirect[3] to personal blog anymore.

[1] https://github.com/damonitor/damonitor.github.io/blob/230038cfd5b85783bc6391f675fab66abe81eb79/index.html
[2] https://damonitor.github.io/_index.html
[3] https://github.com/damonitor/damonitor.github.io/commit/817d619090d8abb02e6a4020ff5d0b9664c6464c

#linux #kernel #damon #blog
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