Sockets, Hop Distance and writing eBPF assembly

Orange FTTH and IPv6 - part twoOrange FTTH and IPv6 - part two 01 April 202301 April 2023 Three years ago I published a guide on how to configure a custom Linux router to work with Orange FTTH setup:Three years ago I published a guide on how to configure a custom Linux router to work with Orange FTTH setup: Orange FTTH on a custom routerOrange FTTH on a custom router The most important part was getting IPv6 working, since it wasn't possible with the "Funbox" router...The most important part was getting IPv6 working, since it wasn't possible with the "Funbox" router...

05 September 202205 September 2022 I was able to put my hands on an HTC Vive VR headset. Sadly, my computers don't have a strong enough GPU for VR.I was able to put my hands on an HTC Vive VR headset. Sadly, my computers don't have a strong enough GPU for VR. Since I only have laptops I decided to secure an eGPU (external GPU) - a box with PCIe bus, connected over thunderbolt, which can house a proper big graphics card. I got Since I only have laptops I decided to secure an eGPU (external GPU) - a box with PCIe bus, connected over thunderbolt, which can house a proper big graphics card. I got Razer Core XRazer Core X. Together with the laptop, the setup looks like this:. Together with the laptop, the setup looks like this:

Marek's Marek's totally not insanetotally not insane idea of the day idea of the day 06 May 202106 May 2021 I published an article on I published an article on Cloudflare blogCloudflare blog:: Branch predictor: How many "if"s are too many? Including x86 and M1 benchmarks!Branch predictor: How many "if"s are too many? Including x86 and M1 benchmarks! Notable discussions...Notable discussions...

02 August 202002 August 2020 Don't actually throw away FunBox. Not only it belongs to the carrier, but also you're not supposed to throw electrical equipment into mixed trash.Don't actually throw away FunBox. Not only it belongs to the carrier, but also you're not supposed to throw electrical equipment into mixed trash. Here in Poland, Orange has a decent Here in Poland, Orange has a decent FTTHFTTH offer - less than $16 for 300Mbit down, 50Mbit up. People reversed it over the years, most impressively... offer - less than $16 for 300Mbit down, 50Mbit up. People reversed it over the years, most impressively...

18 June 202018 June 2020 This article is also co-published on This article is also co-published on Cloudflare blogCloudflare blog:: Why is there a "V" in SIGSEGV Segmentation Fault?Why is there a "V" in SIGSEGV Segmentation Fault? Another long night. I was working on my...Another long night. I was working on my...