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Tanel Poder @tanelpoder.com · 13h

Got lots of good stuff to show :-)

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Reposted by Tanel Poder

Brice Dutheil @bricedutheil.bsky.social · 19h

Seen in twitter from @tanelpoder.com :)

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Tanel Poder @tanelpoder.com · 15d

All we need now is SQL Developer*Plus

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Reposted by Tanel Poder

Jonathan Lewis @jloracle.bsky.social · 16d

Blog post for September 2025

SQL Developer isn't entirely CBO-friendly.
jonathanlewis.wordpress.com/2025/09/24/s...

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Tanel Poder @tanelpoder.com · 18d

I will talk more about this thing -> bsky.app/profile/did:...

Tanel Poder @tanelpoder.com · Sep 9

The xCapture and xtop eBPF tools are now in beta, with a demo dataset!

With a pre-recorded xcapture dataset from my dev server, now you can play with xtop "thread activity sampling" drilldown even on your laptop, without having to run xcapture yourself!

(link in replies :-)

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Reposted by Tanel Poder

ScyllaDB @scylladb.com · 18d

💪 Monday motivation: We are officially one month away from #P99CONF. eBPF has always been a popular topic, and this year is no exception. Don't miss @tanelpoder.com, @ddelnano.bsky.social, Jake Hillion, and @mostlynerdless.de on October 22-23: www.p99conf.io?latest_sfdc_...

#ScyllaDB

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Reposted by Tanel Poder

Ben @benjdd.com · 23d

Two years ago I published a "book" on intro Python programming and host it free of charge at pyflo.net

I occasionally get email like this. It's wonderful to know all those efforts are helping learners around the world.

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Reposted by Tanel Poder

Tanel Poder @tanelpoder.com · 24d

If you have eBPF "biolatency" style IO latency monitoring tools always-on, you might want to reduce its tracepoint CPU overhead by not storing IO start times in a shared hashtable at all.

In my results, 59x lower tracepoint CPU overhead at 37M IOPS 😎

tanelpoder.com/posts/optimi...

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Tanel Poder @tanelpoder.com · 24d

If you have eBPF "biolatency" style IO latency monitoring tools always-on, you might want to reduce its tracepoint CPU overhead by not storing IO start times in a shared hashtable at all.

In my results, 59x lower tracepoint CPU overhead at 37M IOPS 😎

tanelpoder.com/posts/optimi...

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Reposted by Tanel Poder

Bill Mulligan 🐝🐝🐝 @breakawaybilly.bsky.social · 25d

Last week to apply for the first eBPF Foundation Community & Advocacy Fellowship program!

If the last decade was about building the technology, this is about building the community that will take eBPF forward. Open until Friday!

eBPF Foundation Announces Community & Advocacy Fellowship Program – eBPF

The eBPF Foundation is excited to announce a new “eBPF Foundation Community & Advocacy Fellowship” to reward and support innovative ideas that will grow the eBPF ecosystem for an increasingly global…

ebpf.foundation

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Tanel Poder @tanelpoder.com · 29d

The 11-minute video itself is here:

www.youtube.com/watch?v=cZ_z...

xtop: Top for Wall-Clock Time Linux performance troubleshooting tool

YouTube video by Tanel Poder

www.youtube.com

Tanel Poder @tanelpoder.com · 29d

Already getting good questions about 0x.tools in YouTube!

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Reposted by Tanel Poder

Adam Faris @af9.us · 29d

Interesting. QEMU 10.1 supports WASM and can run inside a browser. 🤔

wiki.qemu.org/ChangeLog/10.1

ChangeLog/10.1 - QEMU

wiki.qemu.org

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Reposted by Tanel Poder

Tanel Poder @tanelpoder.com · Sep 9

The xCapture and xtop eBPF tools are now in beta, with a demo dataset!

With a pre-recorded xcapture dataset from my dev server, now you can play with xtop "thread activity sampling" drilldown even on your laptop, without having to run xcapture yourself!

(link in replies :-)

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Tanel Poder @tanelpoder.com · Sep 9

Link to my blog announcement here:

tanelpoder.com/posts/xcaptu...

The xCapture and xtop eBPF tools are now in beta, with a demo dataset - Tanel Poder Consulting

The title says it all, I think it’s time to call the xcapture and xtop toolset a beta version now. There are plenty of bugs, issues and shortcomings to fix before calling this production-grade, ...

tanelpoder.com

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Tanel Poder @tanelpoder.com · Sep 9

The xCapture and xtop eBPF tools are now in beta, with a demo dataset!

With a pre-recorded xcapture dataset from my dev server, now you can play with xtop "thread activity sampling" drilldown even on your laptop, without having to run xcapture yourself!

(link in replies :-)

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Reposted by Tanel Poder

Bryan Cantrill @bcantrill.bsky.social · Sep 7

Excited to announce that @ganeumann.bsky.social will join @ahl.bsky.social and me on the podcast tomorrow to reflect on his 2015 piece -- and what it might portend about current technological frenzies. Join us, Monday, 5p Pacific!
discord.gg/QrcKGTTPrF?e...

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Tanel Poder @tanelpoder.com · Aug 27

One of the coolest tech + data talks I've ever seen. If you like hardware, high performance data and ML check it out :-)

www.youtube.com/watch?v=T8HT...

Big Data and AI at the CERN LHC by Dr. Thea Klaeboe Aarrestad

YouTube video by TigerBeetle

www.youtube.com

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Tanel Poder @tanelpoder.com · Aug 27

The "page cache" is also a separate box not shown to be on the direct path of (some) IO requests. I guess it's just a limitation of mapping everything in a 2-dimensional chart without making things too complex. Although could have put the pagecache in the way of some app requests, "dio" for the rest

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Reposted by Tanel Poder

Tanel Poder @tanelpoder.com · Aug 27

Something for Linux block I/O nerds - Linux Storage Stack Diagram (up to kernel v6.16) published:

www.thomas-krenn.com/en/wiki/Linu...

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Tanel Poder @tanelpoder.com · Aug 27

Something for Linux block I/O nerds - Linux Storage Stack Diagram (up to kernel v6.16) published:

www.thomas-krenn.com/en/wiki/Linu...

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Reposted by Tanel Poder

TigerBeetle @tigerbeetle.com · Aug 26

www.youtube.com/watch?v=T8HT...

Big Data and AI at the CERN LHC by Dr. Thea Klaeboe Aarrestad

YouTube video by TigerBeetle

www.youtube.com

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Reposted by Tanel Poder

Simon Willison @simonwillison.net · Aug 25

Some notes on the insecurity baked into Perplexity's Comet "AI Browser" - the Brave security team reported serious prompt injection vulnerabilities in it, but Brave themselves are developing a similar feature that looks doomed to have similar problems simonwillison.net/2025/Aug/25/...

Agentic Browser Security: Indirect Prompt Injection in Perplexity Comet

The security team from Brave took a look at Comet, the LLM-powered "agentic browser" extension from Perplexity, and unsurprisingly found security holes you can drive a truck through. The vulnerability...

simonwillison.net

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Reposted by Tanel Poder

Tanel Poder @tanelpoder.com · Aug 25

I have published the CatVector embedding-vector heatmap visualization app (for learning and fun!) as a static webpage now (just browser is enough, no downloads or Python needed).

And now we have dark mode too! 😼

tanelpoder.com/catvector/

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Reposted by Tanel Poder

Tanel Poder @tanelpoder.com · Aug 22

This will (again) be fun! I've talked about this method at P99CONF before, this year I'll launch the first ever production-grade version of this. I'll also introduce *passive sampling* that does not use any tracepoints or probes -> no slowdown for your threads!

Demo: www.youtube.com/watch?v=cZ_z...

xtop: Top for Wall-Clock Time Linux performance troubleshooting tool

YouTube video by Tanel Poder

www.youtube.com

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