Brendan Gregg

JULY 2, 2021

There's an arms race to add [eBPF] (BPF) to commercial observability products, and in this post I'll describe how to quickly do that. People like to show me their BPF observability products after they have prototyped or built them, but I often wish I had given them advice before they started. You might not even like BPF.

Open Source 40

Open Source Latency Cache Energy 40

Brendan Gregg

MAY 8, 2021

People often tell me they don't understand performance tool output because they can't tell what's "good" or "bad." It can be hard as performance is subjective. I recently encountered terrible disk performance and thought it'd be useful to collect Linux tool screenshots and share them for reference. Hit Ctrl-C to end.

Performance 40

Performance Latency Speed Systems 40

The Netflix TechBlog

NOVEMBER 22, 2019

December 2 1pm-2pm CMP 326-R Capacity Management Made Easy with Amazon EC2 Auto Scaling Vadim Filanovsky , Senior Performance Engineer & Anoop Kapoor, AWS Abstract :Amazon EC2 Auto Scaling offers a hands-free capacity management experience to help customers maintain a healthy fleet, improve application availability, and reduce costs.

AWS 37

AWS Entertainment Open Source Benchmarking 37

Brendan Gregg

MAY 28, 2021

I've moved from the San Francisco Bay Area to Sydney, Australia, where I will continue the best job so far of my career: Performance engineering at Netflix. Back in 2015 we'd have BPF (iovisor) meetups in Santa Clara and most contributors would be there in person, with some having travelled. And it's worked very well for years.

Google 40

Google Engineering Open Source AWS 40

Brendan Gregg

MARCH 16, 2024

" I pictured how this is used to walk stack traces in my BPF book. Stack Frame with Base Pointer ( x86-64 ABI ) Figure 2-6: Frame Pointer-based Stack Walking ( BPF book ) This stack-walking technique is commonly used by external profilers and debuggers, including Linux perf and eBPF, and ultimately visualized by flame graphs.

Java 145

Java Cache Google Hardware 145

Brendan Gregg

MAY 16, 2017

I previously wrote about Netflix in [2015] and [2016], and if you are interested in what it's like to work here, I already covered much in those posts. Instead, it has been a process of continual improvements, by many engineers across the company. ## A Day in the Life (Performance Engineering) What do I actually do all day?

Java 75

Java Entertainment Engineering Scalability 75

Brendan Gregg

AUGUST 8, 2017

If they are higher than your CPU count, then you might have a performance problem (it depends). His example of using a slower swap disk makes sense: by degrading the system's performance, the demand on the system (measured as running + queued) should increase. which should improve performance and lower the load average.

Latency 111

Latency Metrics C++ Systems 111