Brendan Gregg

SEPTEMBER 5, 2017

Linux has been adding tracing technologies over the years: kprobes (kernel dynamic tracing), uprobes (user-level dynamic tracing), tracepoints (static tracing), and perf_events (profiling and hardware counters). They use third-party software like Docker or Kubernetes to simplify their administration. People rarely create them manually.

Virtualization 76

Virtualization AWS Engineering Hardware 76

Brendan Gregg

JULY 4, 2021

AWS Graviton2); for memory with the arrival of DDR5 and High Bandwidth Memory (HBM) on-processor; for storage including new uses for 3D Xpoint as a 3D NAND accelerator; for networking with the rise of QUIC and eXpress Data Path (XDP); and so on. I also wrote about these topics in detail for my recent [Systems Performance 2nd Edition] book.

Performance 52

Performance Latency Hardware Storage 52

Alex Russell

JANUARY 30, 2024

It's time once again to update our priors regarding the global device and network situation. HTML, CSS, images, and fonts can all be parsed and run at near wire speeds on low-end hardware, but JavaScript is at least three times more expensive, byte-for-byte. What's changed since last year? and 75KiB of JavaScript.

Performance 90

Performance Network Mobile Speed 90

Brendan Gregg

FEBRUARY 28, 2023

link] , 2021 [Trader 21] Tiffany Trader, “Cerebras Second-Gen 7nm Wafer Scale Engine Doubles AI Performance Over First-Gen Chip ,” [link] , Apr 2021 [Ghigoff 21] Yoann Ghigoff, et al.,

Performance 52

Performance Latency Cache Virtualization 52

Percona

JULY 7, 2023

Unfortunately, using certain open source database software as part of an HA architecture can present significant challenges. Despite all its upside, PostgreSQL software presents such challenges. PostgreSQL software supports synchronous streaming replication, asynchronous streaming replication, and logical replication.

Availability 83

Availability Open Source Architecture Database 83

Tim Kadlec

JANUARY 9, 2019

Sites that use an excess of resources, whether on the network or on the device, don’t just cause slow experiences, but can leave entire groups of people out. I recently profiled a page on a Pixel 2 (released in 2017), and an Alcatel 1x (released in 2018). Hardware gets better, sure. On the Alcatel 1x, it took ~65 seconds.

Performance 111

Performance Energy Internet Internet 111

Sutter's Mill

FEBRUARY 13, 2017

” This contains updated and new material that reflects the latest C++ standards and compilers, with a focus to using modern C++11/14/17 effectively on modern hardware and memory architectures. On April 25-27, I’ll be in Stockholm (Kista) giving a three-day seminar on “High-Performance and Low-Latency C++.”

Latency 51

Latency C++ Hardware Performance 51

Alex Russell

APRIL 29, 2021

Real-time network protocols for enabling videoconferencing, desktop sharing, and game streaming applications. Modern, asynchronous network APIs that dramatically improve performance in some situations. WebGL 2 launched for other platforms on Chrome and Firefox in 2017. is access to hardware devices. Delayed five years.

Media 145

Media Games Education Engineering 145

O'Reilly Software

APRIL 4, 2018

Here are five considerations every software architect and developer needs to take into account when setting the architectural foundations for a fast data platform. As Tyler Akiadu, from Google, explained in his Strata NY 2017 presentation, “ Foundations of streaming SQL ”: “Streams are the in-motion form of data, both bounded and unbounded.”

Architecture 80

Architecture Scalability Google Operating System 80

The Morning Paper

JANUARY 19, 2020

STELLA: report from the SNAFU-catchers workshop on coping with complexity , Woods 2017, Coping with Complexity workshop. “Coping with complexity” is about as good a three-word summary of the systems and software challenges facing us over the next decade as I can imagine. A digression on complexity budgets.

C++ 50

C++ Systems Software Software 50

Brendan Gregg

AUGUST 8, 2017

90491 N|rnberg (Germany) Consulting+Networking+Programming+etc'ing 42. I generated this using my offcputime tool from [bcc] (this tool needs eBPF features from Linux 4.8+), and my [flame graph] software: #./bcc/tools/offcputime.py Network I/O? . ;-). kernel/sched.c.orig Fri Oct 29 10:31:11 1993 kernel/sched.c Yes, I'd say so.

Latency 111

Latency Metrics C++ Systems 111

Smashing Magazine

JANUARY 7, 2019

If you don’t have a device at hand, emulate mobile experience on desktop by testing on a throttled network (e.g. To make the performance impact more visible, you could even introduce 2G Tuesdays or set up a throttled 3G network in your office for faster testing. 150ms RTT, 1.5 Mbps down, 0.7 Mbps up) with a throttled CPU (5× slowdown).

Performance 104

Performance Cache Network Metrics 104

The Netflix TechBlog

DECEMBER 23, 2020

In addition to the default Docker namespaces (mount, network, UTS, IPC, and PID), we employ user namespaces for added layers of isolation. Various pieces of software used elevated capabilities for FUSE, low-level packet monitoring, and performance tracing amongst other use cases. making it so that users cannot use “root.”

Media 286

Media Metrics Systems Processing 286