Hacker News: talawahtech

New comment by talawahtech in "PSF has withdrawn $1.5M proposal to US Government grant program"

talawahtech — Mon, 27 Oct 2025 16:10:09 +0000

Thanks for posting this. I just made a donation to the PSF.

New comment by talawahtech in "Ask HN: Who is hiring? (June 2025)"

talawahtech — Tue, 03 Jun 2025 02:05:31 +0000

Amazon Benchmarking | L5 SDEs | Seattle, WA | Full-time | https://www.amazon.jobs/en/jobs/2933471/software-development...

Help make AWS faster, more efficient, and cheaper for our customers!

Our team is hiring multiple SDEs with experience in distributed system performance and strong problem-solving/detective skills.

Feel free to reach out to the hiring manager on LinkedIn with any questions: https://www.linkedin.com/feed/update/urn:li:activity:7324200...

AWS Blog on Postgres Long Fork Anomaly (Response to Jepsen Report)

talawahtech — Sun, 04 May 2025 02:27:23 +0000

Article URL: https://aws.amazon.com/blogs/database/understanding-transaction-visibility-in-postgresql-clusters-with-read-replicas/

Comments URL: https://news.ycombinator.com/item?id=43884003

Points: 18

# Comments: 0

New comment by talawahtech in "Amazon Linux 2023"

talawahtech — Wed, 15 Mar 2023 22:54:55 +0000

Cloud specific features and optimizations, particularly geared toward AWS hardware. Also a combination of a 2 year release cadence and 5 years of Amazon backed of support for each release.

Performance Optimizations: https://docs.aws.amazon.com/linux/al2023/ug/performance-opti...

Release Cadence: https://docs.aws.amazon.com/linux/al2023/ug/release-cadence....

Kernel Live Patching: https://docs.aws.amazon.com/linux/al2023/ug/live-patching.ht...

Cloud Init: https://docs.aws.amazon.com/linux/al2023/ug/cloud-init.html

New comment by talawahtech in "Amazon Linux 2023"

talawahtech — Wed, 15 Mar 2023 22:34:56 +0000

Ships with kernel 6.1. Nice! Also has the most recent releases of bpftrace and bcc.

Full package list: https://docs.aws.amazon.com/linux/al2023/release-notes/all-p...

Lambda Snapstart, and snapshots as a tool for system builders

talawahtech — Wed, 30 Nov 2022 14:59:35 +0000

Article URL: https://brooker.co.za/blog/2022/11/29/snapstart.html

Comments URL: https://news.ycombinator.com/item?id=33801625

Points: 1

# Comments: 0

New comment by talawahtech in "Linux Kernel vs. DPDK: HTTP Performance Showdown"

talawahtech — Wed, 06 Jul 2022 05:09:49 +0000

> It's not actually an HTTP server though...

Correct, it is a fake HTTP server, serving a real HTTP workload. This post is about comparing two different networking stacks (kernel vs DPDK) to see how they handle a specific (and extreme) HTTP workload. From the perspective of the networking stack, the networking hardware, and the AWS networking fabric between instances, these are real HTTP requests and responses.

> I'd really love to see this adapted to do actual webserver work and see what the difference is.

Take a look at my previous article[1]. It is still an extreme/synthetic benchmark, but libreactor was able to hit 1.2M req/s while fully parsing the HTTP requests using picohttpparser[3].

From what I recall, when I played with disabling HTTP parsing in libreactor, the performance improvement was only about 5%.

1. https://talawah.io/blog/extreme-http-performance-tuning-one-...

New comment by talawahtech in "Linux Kernel vs. DPDK: HTTP Performance Showdown"

talawahtech — Tue, 05 Jul 2022 04:09:47 +0000

Yea, it is definitely a fake HTTP server which I acknowledge in the article [1]. However based on the size of the requests, and my observation of the number of packets per second in/out being symmetrical at the network interface level, I didn't have a concern about doubled responses.

Skipping the parsing of the HTTP requests definitely gives a performance boost, but for this comparison both sides got the same boost, so I didn't mind being less strict. Seastar's HTTP parser was being finicky, so I chose the easy route and just removed it from the equation.

For reference though, in my previous post[2] libreactor was able to hit 1.2M req/s while fully parsing the HTTP requests using picohttpparser[3]. But that is still a very simple and highly optimized implementation. FYI, from what I recall, when I played with disabling HTTP parsing in libreactor, I got a performance boost of about 5%.

1. https://talawah.io/blog/linux-kernel-vs-dpdk-http-performanc...

2. https://talawah.io/blog/extreme-http-performance-tuning-one-...

3. https://github.com/h2o/picohttpparser

Linux Kernel vs. DPDK: HTTP Performance Showdown

talawahtech — Mon, 04 Jul 2022 21:39:38 +0000

Article URL: https://talawah.io/blog/linux-kernel-vs-dpdk-http-performance-showdown/

Comments URL: https://news.ycombinator.com/item?id=31982026

Points: 168

# Comments: 71

New comment by talawahtech in "Show HN: Wachy – A UI for eBPF-based performance debugging"

talawahtech — Sat, 26 Mar 2022 19:00:35 +0000

Very cool! Most of my bpftrace usage has been on the kernel side, but out of habit I often fall back to the debugger (or printf) in userland, which can seriously distort analysis of low latency functions, especially if polling or timers are involved.

I am going to try this out next week.

New comment by talawahtech in "The New York Times buys Wordle"

talawahtech — Mon, 31 Jan 2022 21:50:11 +0000

> Wordle was acquired for an undisclosed price in the low-seven figures.

New comment by talawahtech in "Price increase on .io domains on January 1, 2022 (Renewal: $55.00)"

talawahtech — Wed, 01 Dec 2021 17:08:20 +0000

Sure, I was just pointing out that their current rates are cheaper than gandi, especially for renewals. So if someone wants to renew for multiple years it may make sense to switch.

New comment by talawahtech in "Price increase on .io domains on January 1, 2022 (Renewal: $55.00)"

talawahtech — Wed, 01 Dec 2021 17:07:15 +0000

No, I confirmed that it is for all years. They deliberately don't make money on domain name registration. The use it to attract/retain business for their other services.

New comment by talawahtech in "Price increase on .io domains on January 1, 2022 (Renewal: $55.00)"

talawahtech — Wed, 01 Dec 2021 15:36:19 +0000

FYI Cloudflare currently charges $30 per year for .io domains.

New comment by talawahtech in "AWS Graviton 3 Instances"

talawahtech — Tue, 30 Nov 2021 18:13:52 +0000

AWS re:Invent is this week. This was announced as part of the CEO's keynote. I am sure we will get more details throughout the week in some of the more technical sessions.

New comment by talawahtech in "AWS Graviton 3 Instances"

talawahtech — Tue, 30 Nov 2021 17:25:21 +0000

I was wondering how they were going to manage the fact that AMDs Zen3 based instances would likely be faster than Graviton2. Color me impressed. AWS' pace of innovation is blistering.

New comment by talawahtech in "My indoor rowing tips after 15M meters"

talawahtech — Tue, 19 Oct 2021 00:17:21 +0000

I wear bluetooth headphones which are connected to my Android TV player (Nvidia Shield).

New comment by talawahtech in "My indoor rowing tips after 15M meters"

talawahtech — Tue, 19 Oct 2021 00:16:05 +0000

I don't go flat-out, but it is definitely high-intensity. I am always out of breath at the end, but not collapsed on the floor.

When I started I was doing around 2:05/500m. Now I am down to around 1:56/1:57, but some days I will go slower if I didn't sleep great or something. It is more about the consistency than the pace.

It is less than 8 mins total so it is enough to wake me up and get my heart pumping, but also allow me to recover quickly and feel ready to start the day.

New comment by talawahtech in "My indoor rowing tips after 15M meters"

talawahtech — Mon, 18 Oct 2021 22:05:25 +0000

I've been rowing twice a day, every day since the pandemic and it has been a game changer. A high intensity 2k (while listening to music) in the mornings before I start my day, and a low intensity 5k (while watching tv) at night.

It is the most consistent I have ever been with at-home exercise and it has been perfect for managing stress and getting good sleep.

New comment by talawahtech in "Extreme HTTP Performance Tuning"

talawahtech — Fri, 21 May 2021 20:20:34 +0000

1.2M req/s means 2.4M (send/recv) syscalls per second. I definitely think io_uring will make a difference. Just not sure if it will be 5% or 25%.