The Netflix TechBlog

JUNE 4, 2019

We were able to meaningfully improve both the predictability and performance of these containers by taking some of the CPU isolation responsibility away from the operating system and moving towards a data driven solution involving combinatorial optimization and machine learning. We want to extend the system to support CPU oversubscription.

Cache 251

Cache Latency Airlines Logistics 251

Adrian Cockcroft

FEBRUARY 9, 2023

The layers of platforms start at the bottom with hardware choices such as which CPU architectures and vendors you want to use. The next layer is operating system platforms, what flavor of Linux, what version of Windows etc.

Engineering 137

Engineering Serverless Lambda AWS 137

Percona

JUNE 20, 2023

In order to understand “segmentation fault,” it is a must to know the basic idea of segmentation and its implementation in C programming. The following are possible causes for segmentation fault: Operating system issues Buggy OS kernel Faulty hardware(specifically memory) Bug in a product (e.g., 0ubuntu1~20.04.1)

Programming 83

Programming C++ Database Virtualization 83

HammerDB

OCTOBER 18, 2019

So lets take an Ubuntu system with Platinum 8280 CPUs with the following Ubuntu OS, reboot and check the CPU configuration before running any tests. So by default, the system boots into powersave. hardware limits: 1000 MHz - 4.00 hardware limits: 1000 MHz - 4.00 bin/pgbench -c 1 -S -T 60 pgbench starting vacuum.end.

Benchmarking 63

Benchmarking Performance Hardware C++ 63

Brendan Gregg

SEPTEMBER 25, 2021

CLI tools The Cassandra systems were EC2 virtual machine (Xen) instances. As a Xen guest, this profile was gathered using perf(1) and the kernel's software cpu-clock soft interrupts, not the hardware NMI. Microbenchmark os::javaTimeMillis() on both systems. As (C) looked like a kernel rebuild, I started with (D) and (E). ## 5.

Speed 126

Speed Java AWS Virtualization 126

The Morning Paper

DECEMBER 8, 2019

At the start of November I was privileged to attend HPTS (the High Performance Transaction Systems) conference in Asilomar. On the last morning of the conference Daniel Bittman presented some of the work being done in the context of the Twizzler OS project to explore new programming models for NVM. What about security?

Hardware 56

Hardware Programming Media Storage 56

Testsigma

FEBRUARY 3, 2021

Mobiles have different models, screen resolutions, operating systems, network types, hardware configurations, etc. Also, how to test the hardware of the mobile phone itself, is it supporting all the software as it should? Let us have a look at the most popular types of mobile testing for applications and hardware.

Mobile 82

Mobile Testing Hardware C++ 82

Adrian Cockcroft

JUNE 21, 2022

Photo by Adrian I spent six years at Cambridge Consultants, building some interesting systems, managing our Sun workstations and learning a lot, but by then Sun had opened a sales office across the street, and I wanted to find out what they were going to release next, before everyone else.

Tuning 52

Tuning Benchmarking Engineering C++ 52

Nick Desaulniers

APRIL 6, 2020

May I present to you episode I; “ Off by Two.” halt (); Some sort of very early exception handler; better to sit busy in an infinite loop than run off and destroy hardware or corrupt data, I suppose. Recent work. has given me much fulfilment and a long list of truly awful bugs to recount. halt_loop: while ( true ).

C++ 67

C++ Hardware Code Virtualization 67

ACM Sigarch

APRIL 8, 2019

However, we often hear anecdotes that the number of prospective graduate students applying to computer architecture/systems is small and shrinking. Below we present some thoughts on the why and one solution to address the issue. Her current work focuses on hardware/software co-design for extremely large-scale deep learning training.

Architecture 74

Architecture Open Source Hardware Software Engineering 74

HammerDB

OCTOBER 12, 2018

This post complements the previous best practice guides this time with the focus on MySQL and MariaDB and achieving top levels of performance with the HammerDB MySQL TPC-C test. As is exactly the same with PostgreSQL for system choice a 2 socket system is optimal for MySQL OLTP performance. order by c.

Best Practices 40

Best Practices Scalability Performance C++ 40

Smashing Magazine

NOVEMBER 16, 2021

Conventional computers now sport touchscreens and otherwise blur the lines between device types – and between mobile and desktop operating systems. Touch Design for Mobile Interfaces presents and shares real information on hardware, people, interactions, and environments. If you are in the C-suite, do yourself a favor and read.

Mobile 87

Mobile Design Best Practices Website 87

HammerDB

JANUARY 5, 2019

For example the following chart (with the actual data removed for the reasons described further in this post) shows the HammerDB TPC-C workload run against the same database on different processing architectures (grouped by colour) and speed with the most recent at the top. In all cases this is random data so presents no security challenges.

Benchmarking 40

Benchmarking Database Social Media Scalability 40

Brendan Gregg

SEPTEMBER 25, 2021

CLI tools The Cassandra systems were EC2 virtual machine (Xen) instances. As a Xen guest, this profile was gathered using perf(1) and the kernel's software cpu-clock soft interrupts, not the hardware NMI. Microbenchmark os::javaTimeMillis() on both systems. As (C) looked like a kernel rebuild, I started with (D) and (E).

Speed 52

Speed Java AWS Virtualization 52

The Morning Paper

JANUARY 19, 2020

“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. introduce a requirement for one human to need to understand more complexity than is reasonable) and you’re no longer in control of your systems. Go overdrawn (i.e.,

C++ 50

C++ Systems Software Software 50

Brendan Gregg

SEPTEMBER 25, 2021

CLI tools The Cassandra systems were EC2 virtual machine (Xen) instances. As a Xen guest, this profile was gathered using perf(1) and the kernel's software cpu-clock soft interrupts, not the hardware NMI. Microbenchmark os::javaTimeMillis() on both systems. As (C) looked like a kernel rebuild, I started with (D) and (E). ## 6.

Speed 40

Speed Java AWS Virtualization 40

The Morning Paper

SEPTEMBER 12, 2019

If you think about a system like Procella that’s combining transactional and analytic workloads on top of a cloud-native architecture, extensions to SQL for streaming , dataflow based materialized views (see e.g. It would be a bold departure from the current imperative high-level DSL based approach to deep learning taken by TensorFlow et al.,

Network 44

Network Database Programming Hardware 44

SQL Server According to Bob

DECEMBER 18, 2018

Durability: “In database systems , durability is the ACID property which guarantees transactions that have committed will survive permanently. For example, if a flight booking reports that a seat has successfully been booked, then the seat will remain booked even if the system crashes.” – [link]. The Back Story.

Servers 90

Servers Media Cache Storage 90

Testsigma

JUNE 19, 2020

It supports multi programming languages like Python, Java, C# etc. It supports multi-operating system support like Windows, Linux etc. Selenium consume less hardware support for test cases execution 7. All the plugins which are present in pom.xml stored in a central maven repository and it is present in the <dependency> tag.

Testing Tools 60

Testing Tools Testing Open Source Java 60

Alex Russell

JUNE 20, 2020

3] Oh, and it should be imperatively programmed with Lisp-in-C's-clothing. Recall that browsers arose atop platforms that universally provided a host of services by the late 90's: system fonts (to support layout programs, including WYSIWYG editing). In each quantum of time, hardware and OS vendors press ahead, adding features.

Hardware 55

Hardware Games Java Media 55

John McCalpin

JANUARY 22, 2018

Dr. Damon McDougall gave a short presentation on this study at the IXPUG 2018 Fall Conference ( pdf ) — I originally wrote these notes to help organize my thoughts as we were preparing the IXPUG presentation, and later decided that the extra details contained here are interesting enough for me to post it. cmpl $1000000000, %eax.

Latency 40

Latency Hardware Code Testing 40

Brendan Gregg

SEPTEMBER 5, 2017

What follows are topics that may be of interest to anyone looking to migrate their systems and skillset: scan these to find topics that interest you. ## ZFS ZFS is available for Linux via the [zfsonlinux] and [OpenZFS] projects, and more recently was included in Canonical's Ubuntu Linux distribution: Ubuntu Xenial 16.04 Hit Ctrl-C to end. ^C

Virtualization 76

Virtualization AWS Engineering Hardware 76

SQL Server According to Bob

JANUARY 11, 2020

​​ Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information presented after the date of publication. This White Paper is for informational purposes only.

Servers 40

Servers Cache Database Media 40

O'Reilly

SEPTEMBER 19, 2023

Doubly so as hardware improved, eating away at the lower end of Hadoop-worthy work. And that brings our story to the present day: Stage 3: Neural networks High-end video games required high-end video cards. Google goes a step further in offering compute instances with its specialized TPU hardware.

Hardware 99

Hardware Storage Big Data Blockchain 99

Smashing Magazine

JANUARY 7, 2019

On the other hand, we have hardware constraints on memory and CPU due to JavaScript parsing times (we’ll talk about them in detail later). Gatsby.js (React), Preact CLI , and PWA Starter Kit provide reasonable defaults for fast loading out of the box on average mobile hardware. But this consideration needs to be deliberate.

Performance 104

Performance Cache Metrics Network 104

Smashing Magazine

JANUARY 6, 2020

On the other hand, we have hardware constraints on memory and CPU due to JavaScript parsing times (we’ll talk about them in detail later). Gatsby (React), Vuepress (Vue) Preact CLI , and PWA Starter Kit provide reasonable defaults for fast loading out of the box on average mobile hardware. ??Also,

Performance 145

Performance Cache Network Metrics 145

Smashing Magazine

JANUARY 11, 2021

On the other hand, we have hardware constraints on memory and CPU due to JavaScript parsing and execution times (we’ll talk about them in detail later). Gatsby (React), Next.js (React), Vuepress (Vue), Preact CLI , and PWA Starter Kit provide reasonable defaults for fast loading out of the box on average mobile hardware. ??Also,

Performance 145

Performance Cache Media Metrics 145

Smashing Magazine

AUGUST 22, 2021

In reality, these are actually TLS features that were already present in some form in TLS 1.2 For example, for streams A, B, and C, we might see a packet sequence of ABCABCABCABCABCABCABCABC , where we change the active stream in each packet (let’s call this round-robin). and are now fully fledged in TLS 1.3. Large preview ).

Performance 106

Performance Network Latency Servers 106