Jeff Geerling
@jeffgeerling.com
Father, author, developer, maker. Sometimes called "an inflammatory enigma". #stl #ansible #k8s #raspberrypi #mac #crohns www.jeffgeerling.com
This madman did it: 5090 on a Pi 5 (and Rock 5B, and a couple other small systems) scottjg.com/posts/2026-0...
RTX 5090 + Raspberry Pi: Can it Game?
It turns out, you can attach an external GPU to a Raspberry Pi 5. So my natural first question is, can I game on it? Let’s try it out and compare it with some similar computers.
For the showdown of cr...
scottjg.com
January 9, 2026 at 11:06 PM
This madman did it: 5090 on a Pi 5 (and Rock 5B, and a couple other small systems) scottjg.com/posts/2026-0...
A highlight of last year was attending @opensaucelive.bsky.social and meeting tons of amazing makers and content creators. If you can make it Jul 18-19, in San Mateo CA, it's worth it.
'Super' early bird pricing ends tomorrow... opensauce.com/tickets/
'Super' early bird pricing ends tomorrow... opensauce.com/tickets/
January 8, 2026 at 6:19 PM
A highlight of last year was attending @opensaucelive.bsky.social and meeting tons of amazing makers and content creators. If you can make it Jul 18-19, in San Mateo CA, it's worth it.
'Super' early bird pricing ends tomorrow... opensauce.com/tickets/
'Super' early bird pricing ends tomorrow... opensauce.com/tickets/
January 8, 2026 at 2:37 AM
It's rich AMD showing off a multi-million dollar AI compute rack at a "Consumer" electronics show :(
January 6, 2026 at 3:10 AM
It's rich AMD showing off a multi-million dollar AI compute rack at a "Consumer" electronics show :(
Raspberry Pi's are cheaper than Mini PCs again!
And that's not good news... sigh. Let's get into it: www.youtube.com/watch?v=YDM4...
And that's not good news... sigh. Let's get into it: www.youtube.com/watch?v=YDM4...
Raspberry Pis are cheaper than Mini PCs again
YouTube video by Level 2 Jeff
www.youtube.com
January 5, 2026 at 10:05 PM
Raspberry Pi's are cheaper than Mini PCs again!
And that's not good news... sigh. Let's get into it: www.youtube.com/watch?v=YDM4...
And that's not good news... sigh. Let's get into it: www.youtube.com/watch?v=YDM4...
The Mono Gateway is a 10 Gbps router with dual SFP+ ports that fits in 1U in a mini rack. It's custom-built for open source Linux router software like OpenWRT, and I tested its throughput on @ServeTheHome's $1m CyPerf server!
Video: www.youtube.com/watch?v=3D5q...
Video: www.youtube.com/watch?v=3D5q...
January 2, 2026 at 3:20 PM
The Mono Gateway is a 10 Gbps router with dual SFP+ ports that fits in 1U in a mini rack. It's custom-built for open source Linux router software like OpenWRT, and I tested its throughput on @ServeTheHome's $1m CyPerf server!
Video: www.youtube.com/watch?v=3D5q...
Video: www.youtube.com/watch?v=3D5q...
I'm feeling targeted right now... blog.adafruit.com/2025/12/30/n...
blog.adafruit.com
December 30, 2025 at 11:19 PM
I'm feeling targeted right now... blog.adafruit.com/2025/12/30/n...
Excellent timing talk on PTP with a great live demo at #39c3 by Oliver Ettlin: media.ccc.de/v/39c3-excus... (h/t to toot.io/@hisold/1158...)
Excuse me, what precise time is It?
With PTP 1588, AES67, and SMPTE 2110, we can transmit synchronous audio and video with sub-millisecond latency over the asynchronous medi...
media.ccc.de
December 29, 2025 at 4:06 PM
Excellent timing talk on PTP with a great live demo at #39c3 by Oliver Ettlin: media.ccc.de/v/39c3-excus... (h/t to toot.io/@hisold/1158...)
Starting the blog migration from Drupal to Hugo.
16 years on Drupal (6, 7, 8, 9, and 10). Before that it was a Java SSG called Thingamablog, and before that, Xanga!
Big Q is whether I should wait until I have comment system ready before migrating or bring comments later...
16 years on Drupal (6, 7, 8, 9, and 10). Before that it was a Java SSG called Thingamablog, and before that, Xanga!
Big Q is whether I should wait until I have comment system ready before migrating or bring comments later...
December 29, 2025 at 1:05 AM
Starting the blog migration from Drupal to Hugo.
16 years on Drupal (6, 7, 8, 9, and 10). Before that it was a Java SSG called Thingamablog, and before that, Xanga!
Big Q is whether I should wait until I have comment system ready before migrating or bring comments later...
16 years on Drupal (6, 7, 8, 9, and 10). Before that it was a Java SSG called Thingamablog, and before that, Xanga!
Big Q is whether I should wait until I have comment system ready before migrating or bring comments later...
AI is finally becoming self-aware
December 26, 2025 at 5:51 PM
AI is finally becoming self-aware
For the last video of the year, I tested Dell's "Dell Pro Max with GB10" (rolls right off the tongue, that).
Dell sent two and mentioned they aren't gaming boxes, so maybe don't focus on that in a review. So guess what I did first ;)
www.youtube.com/watch?v=FjRK...
Dell sent two and mentioned they aren't gaming boxes, so maybe don't focus on that in a review. So guess what I did first ;)
www.youtube.com/watch?v=FjRK...
December 26, 2025 at 3:03 PM
For the last video of the year, I tested Dell's "Dell Pro Max with GB10" (rolls right off the tongue, that).
Dell sent two and mentioned they aren't gaming boxes, so maybe don't focus on that in a review. So guess what I did first ;)
www.youtube.com/watch?v=FjRK...
Dell sent two and mentioned they aren't gaming boxes, so maybe don't focus on that in a review. So guess what I did first ;)
www.youtube.com/watch?v=FjRK...
Bluey performed admirably, but I think was enjoying a little time alone on the kitchen floor, away from the mayhem.
December 26, 2025 at 3:36 AM
Bluey performed admirably, but I think was enjoying a little time alone on the kitchen floor, away from the mayhem.
Here's the wash cycle of my broken Bosch 500 series dishwasher.
It's fixed now (pump was making grinding noises and was very weak), but this is like strike 7 for this dumb appliance.
Might have to make another video about it sometime.
It's fixed now (pump was making grinding noises and was very weak), but this is like strike 7 for this dumb appliance.
Might have to make another video about it sometime.
December 24, 2025 at 6:26 PM
Here's the wash cycle of my broken Bosch 500 series dishwasher.
It's fixed now (pump was making grinding noises and was very weak), but this is like strike 7 for this dumb appliance.
Might have to make another video about it sometime.
It's fixed now (pump was making grinding noises and was very weak), but this is like strike 7 for this dumb appliance.
Might have to make another video about it sometime.
Reposted by Jeff Geerling
to save any of y'all trying the new @jeffgeerling.com super rdma jaccl magic and you only have the thunderbolt 4?
don't bother, you need thunderbolt 5.
however you can still use ring mode though, which as you can see isn't so shabby at 37.9 Gbit/s of old fashioned TCP over thunderbolt 4!
#hpc #ai
don't bother, you need thunderbolt 5.
however you can still use ring mode though, which as you can see isn't so shabby at 37.9 Gbit/s of old fashioned TCP over thunderbolt 4!
#hpc #ai
December 23, 2025 at 4:19 PM
to save any of y'all trying the new @jeffgeerling.com super rdma jaccl magic and you only have the thunderbolt 4?
don't bother, you need thunderbolt 5.
however you can still use ring mode though, which as you can see isn't so shabby at 37.9 Gbit/s of old fashioned TCP over thunderbolt 4!
#hpc #ai
don't bother, you need thunderbolt 5.
however you can still use ring mode though, which as you can see isn't so shabby at 37.9 Gbit/s of old fashioned TCP over thunderbolt 4!
#hpc #ai
Wind storms last week set in motion disaster recovery plans at NIST, and almost took out a primary time reference: www.youtube.com/watch?v=ZRB7...
I'm sure the folks at NIST running the Internet's time clocks were feeling the pressure, and they handled it well.
I'm sure the folks at NIST running the Internet's time clocks were feeling the pressure, and they handled it well.
NIST's NTP clock was microseconds from disaster
YouTube video by Jeff Geerling
www.youtube.com
December 22, 2025 at 4:26 PM
Wind storms last week set in motion disaster recovery plans at NIST, and almost took out a primary time reference: www.youtube.com/watch?v=ZRB7...
I'm sure the folks at NIST running the Internet's time clocks were feeling the pressure, and they handled it well.
I'm sure the folks at NIST running the Internet's time clocks were feeling the pressure, and they handled it well.
Thanks to WLAN Pi for shipping a couple of their WLAN Pi Go units for testing — a CM4-based mobile WiFi analysis tool. Over on Geerling Engineering, here's our take: www.youtube.com/watch?v=JYdV...
We spy on your WiFi with this little Pi
YouTube video by Geerling Engineering
www.youtube.com
December 22, 2025 at 3:19 PM
Thanks to WLAN Pi for shipping a couple of their WLAN Pi Go units for testing — a CM4-based mobile WiFi analysis tool. Over on Geerling Engineering, here's our take: www.youtube.com/watch?v=JYdV...
FYI the time was only ever off by 5μs, so they kept the NTP servers running, thanks to some heroics by staff who remained onsite during the wind storms.
Still have to deal with the clock drift, but seems like crisis averted for now! groups.google.com/a/list.nist....
Still have to deal with the clock drift, but seems like crisis averted for now! groups.google.com/a/list.nist....
December 22, 2025 at 3:12 AM
FYI the time was only ever off by 5μs, so they kept the NTP servers running, thanks to some heroics by staff who remained onsite during the wind storms.
Still have to deal with the clock drift, but seems like crisis averted for now! groups.google.com/a/list.nist....
Still have to deal with the clock drift, but seems like crisis averted for now! groups.google.com/a/list.nist....
Working on PTP, NTP, GPS, PPS, and Sync-E support on the Switchberry with a couple other timing-folk at Time Appliances; today's task was assembling the 3D printed case for the first time (design by JaredC01, who's been a great help!) www.youtube.com/watch?v=BWii...
Putting together the first Switchberry (a managed PTP switch)
YouTube video by Level 2 Jeff
www.youtube.com
December 22, 2025 at 12:06 AM
Working on PTP, NTP, GPS, PPS, and Sync-E support on the Switchberry with a couple other timing-folk at Time Appliances; today's task was assembling the 3D printed case for the first time (design by JaredC01, who's been a great help!) www.youtube.com/watch?v=BWii...
Now's a good time to mention this neat little box I've been helping with...
It's not yet ready for prime time, but we have GPS, PPS, and NTP, working on SyncE
It's not yet ready for prime time, but we have GPS, PPS, and NTP, working on SyncE
December 20, 2025 at 8:33 PM
Now's a good time to mention this neat little box I've been helping with...
It's not yet ready for prime time, but we have GPS, PPS, and NTP, working on SyncE
It's not yet ready for prime time, but we have GPS, PPS, and NTP, working on SyncE
2 GPUs 1 Pi
What I found surprised me. This isn't as insane as you think it is...
youtube.com/watch?v=8X2Y...
What I found surprised me. This isn't as insane as you think it is...
youtube.com/watch?v=8X2Y...
December 20, 2025 at 3:02 PM
2 GPUs 1 Pi
What I found surprised me. This isn't as insane as you think it is...
youtube.com/watch?v=8X2Y...
What I found surprised me. This isn't as insane as you think it is...
youtube.com/watch?v=8X2Y...
A good time to check on holdover clock, and maybe consider running your own NTP infrastructure in house, so you can easily switch references when needed.
We're gonna be leaning on @jeffgeerling.com for accurate time in 2026 at this rate.
Due to a windstorm-related utility power outage at the NIST, time may soon be destroyed
December 20, 2025 at 2:22 PM
A good time to check on holdover clock, and maybe consider running your own NTP infrastructure in house, so you can easily switch references when needed.
I'm testing 1.5 TB of VRAM on a cluster of Mac Studios, courtesy of RDMA support in macOS 26.2, and Exo Labs' new version of Exo (released under the OSS Apache 2.0 license today).
December 18, 2025 at 2:03 PM
I'm testing 1.5 TB of VRAM on a cluster of Mac Studios, courtesy of RDMA support in macOS 26.2, and Exo Labs' new version of Exo (released under the OSS Apache 2.0 license today).
Hello Phoenix I am in you
December 17, 2025 at 9:04 PM
Hello Phoenix I am in you
The CM0 is a Pi Zero 2 W, except in stamp form, with castellated edges, so it's easier to pick and place and solder to another PCB.
It's only being sold in China currently, for integration into OEM products.
It's only being sold in China currently, for integration into OEM products.
December 12, 2025 at 3:15 PM
The CM0 is a Pi Zero 2 W, except in stamp form, with castellated edges, so it's easier to pick and place and solder to another PCB.
It's only being sold in China currently, for integration into OEM products.
It's only being sold in China currently, for integration into OEM products.