Brendan Gregg

FEBRUARY 28, 2023

## References I've reproduced the references from my SREcon22 keynote below, so you can click on links: - [Gregg 08] Brendan Gregg, “ZFS L2ARC,” [link] Jul 2008 - [Gregg 10] Brendan Gregg, “Visualizations for Performance Analysis (and More),” [link] 2010 - [Greenberg 11] Marc Greenberg, “DDR4: Double the speed, double the latency?

Performance 103

Performance Latency Cache Virtualization 103

Brendan Gregg

SEPTEMBER 25, 2021

These strange questions came to the fore back in 2014 when Netflix was switching services from CentOS Linux to Ubuntu, and I helped debug several weird performance issues including one I'll describe here. Measuring the speed of time Is there already a microbenchmark for os::javaTimeMillis()? How long does it take to read the time?

Speed 40

Speed Java AWS Virtualization 40

Brendan Gregg

NOVEMBER 28, 2017

At Netflix, we've been using these technologies as they've been made available for instance types in the AWS EC2 cloud. The latest AWS hypervisor, Nitro, uses everything to provide a new hardware-assisted hypervisor that is easy to use and has near bare-metal performance. AWS called this [enhanced networking]. The first was c3.

Virtualization 40

Virtualization AWS Hardware Storage 40

Brendan Gregg

JULY 15, 2019

I've been helping lead BPF observability since 2014, and I'm a major contributor and maintainer for the front-ends. I learned firsthand how to bring beginners from different backgrounds up to speed. I'm also grateful that my fiancée, Deirdré Straughan, could find the time outside of her AWS job to do technical copy-edit.

Systems 111

Systems Performance Education Technology 111

Brendan Gregg

JULY 4, 2021

It's an exciting time for developments in computer performance, not just for the BPF technology (which I often [write about]) but also for processors with 3D stacking and cloud vendor CPUs (e.g., Ford, et al., “TCP on Upcoming Sapphire Rapids CPUs,” [link] Oct 2020 - [Liu 20] Linda Liu, “Samsung QVO vs EVO vs PRO: What’s the Difference?

Performance 52

Performance Latency Hardware Storage 52

Brendan Gregg

FEBRUARY 28, 2023

References I've reproduced the references from my SREcon22 keynote below, so you can click on links: [Gregg 08] Brendan Gregg, “ZFS L2ARC,” [link] , Jul 2008 [Gregg 10] Brendan Gregg, “Visualizations for Performance Analysis (and More),” [link] , 2010 [Greenberg 11] Marc Greenberg, “DDR4: Double the speed, double the latency?

Performance 52

Performance Latency Cache Virtualization 52

Brendan Gregg

SEPTEMBER 5, 2017

Both Xen and KVM have had many performance and security improvements, and workloads can now be tuned to run at almost bare metal speeds (say, a 3% loss or less). But there's another factor at play: jobs are also migrating from both Solaris and Linux to cloud jobs instead, specifically AWS.

Virtualization 75

Virtualization AWS Engineering Hardware 75

Brendan Gregg

JULY 14, 2019

I've been helping lead BPF observability since 2014, and I'm a major contributor and maintainer for the front-ends. I learned firsthand how to bring beginners from different backgrounds up to speed. I'm also grateful that my fiancée, Deirdré Straughan, could find the time outside of her AWS job to do technical copy-edit.

Systems 40

Systems Performance Education Technology 40