Cache, Hardware, Programming and Virtualization

Kubernetes in the wild report 2023

Dynatrace

JANUARY 16, 2023

The report also reveals the leading programming languages practitioners use for application workloads. are the top 3 programming languages for Kubernetes application workloads. Accordingly, the remaining 27% of clusters are self-managed by the customer on cloud virtual machines. Java, Go, and Node.js

Open Source

Open Source Java Operating System Programming

The Return of the Frame Pointers

Brendan Gregg

MARCH 16, 2024

Only in extreme circumstances does the cost (in processor time and I-cache footprint) translate to a tangible benefit - circumstances which usually resort to hand-coded assembly anyway. Having done this before, it reminds me of CSS programming: you make a little change here and everything breaks, and you spend hours chasing your own tail.

Java

Java Cache Google Hardware

Bring Your Own Cloud (BYOC) vs. Dedicated Hosting at ScaleGrid

Scalegrid

APRIL 16, 2020

This is why our BYOC pricing is less than our Dedicated Hosting pricing, as the costs listed for BYOC are only what you pay for ScaleGrid and don’t include your hardware costs. A vast majority of the features are the same, outside of these advanced features available through the BYOC model: Virtual Private Clouds / Virtual Networks.

Cloud

Cloud Azure AWS Database

Current status, needs, and challenges in Heterogeneous and Composable Memory from the HCM workshop (HPCA’23)

ACM Sigarch

MAY 31, 2023

using Compute Express Link or CXL), organizing memory components for optimal performance, adapting system software traditionally designed for homogeneous memory systems, and developing memory abstractions and programming constructs for HCM management. About CXL hardware availability with academia. Using emulation (e.g.

Latency

Latency Hardware Cache Architecture

HammerDB for Managers

HammerDB

JUNE 27, 2022

It enables the user to measure database performance and make comparative judgements about database hardware and software. These factors meant that often when looking for database performance information, the results for a particular combination of software and hardware were not available. Cached vs Scaled Workloads.

Benchmarking

Benchmarking Open Source C++ Cache

USENIX SREcon APAC 2022: Computing Performance: What's on the Horizon

Brendan Gregg

FEBRUARY 28, 2023

I'm now program co-chair for SREcon 2023 APAC, and our 2023 conference is June 14-16 in Singapore. And now, helping bring USENIX conferences to Australia by giving the first keynote: I could not have scripted or expected it. The call for participation ends on March 2nd 23:59 SGT!

Performance

Performance Latency Cache Virtualization

A tale of two abstractions: the case for object space

The Morning Paper

DECEMBER 10, 2019

This is a companion paper to the " persistent problem " piece that we looked at earlier this week, going a little deeper into the object pointer representation choices and the mapping of a virtual object space into physical address spaces. Both abstractions must be implemented in a way that is efficient using existing hardware.

Hardware

Hardware Virtualization Operating System Programming

A persistent problem: managing pointers in NVM

The Morning Paper

DECEMBER 8, 2019

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. The starting point is a set of three asumptions for an NVM-based programming model: Compared to traditional persistent media, NVM is fast.

Hardware

Hardware Programming Media Storage

USENIX SREcon APAC 2022: Computing Performance: What's on the Horizon

Brendan Gregg

FEBRUARY 28, 2023

I'm now program co-chair for SREcon 2023 APAC, and our 2023 conference is June 14-16 in Singapore. And now, helping bring USENIX conferences to Australia by giving the first keynote: I could not have scripted or expected it. It was a great privilege. The call for participation ends on March 2nd 23:59 SGT!

Performance

Performance Latency Cache Virtualization

SQL Server On Linux: Forced Unit Access (Fua) Internals

SQL Server According to Bob

DECEMBER 18, 2018

Device level flushing may have an impact on your I/O caching, read ahead or other behaviors of the storage system. FILE_FLAG_NO_BUFFERING is the Win32, CreateFile API flags and attributes setting to bypass file system cache. FILE_FLAG_NO_BUFFERING is the Win32, CreateFile API flags and attributes setting to bypass file system cache.

Servers

Servers Media Cache Storage

A thorough introduction to bpftrace

Brendan Gregg

AUGUST 18, 2019

bpftrace uses BPF (Berkeley Packet Filter), an in-kernel execution engine that processes a virtual instruction set. The probe specifies what events to instrument, the filter is optional and can filter down the events based on a boolean expression, and the action is the mini program that runs. There's no filter. BEGIN Start of bpftrace.

Latency

Latency C++ Cache Programming

Architectural Myopia

ACM Sigarch

FEBRUARY 23, 2018

It is much more difficult to publish truly risky, revolutionary research due to implicit filters in what gets funded and what makes it past a program committee. Virtualization, for instance, was being addressed by IBM in the 1960s. We believed existing hardware and OS protocols protected the processor. Discounting the Past.

Architecture

Architecture Cache Hardware Virtualization

RUM vs APM

KeyCDN

JANUARY 23, 2020

A wide range of users with different operating systems, browsers, hardware configurations and other variables provides a wide sample size that helps developers discover as many issues as possible. This helps developers decide when to increase server disk space and power or whether or not using a virtual cloud server is optimal.

Strategy

Strategy Metrics Monitoring Servers

Progress Delayed Is Progress Denied

Alex Russell

APRIL 29, 2021

Now in development in WebKit after years of radio silence, WebXR APIs provide Augmented Reality and Virtual Reality input and scene information to web applications. Provides support for "unread counts", e.g. for email and chat programs. is access to hardware devices. PWA App Icon Badging. Media Session API.

Media

Media Games Education Engineering

SQL Server I/O Basics Chapter #1

SQL Server According to Bob

JANUARY 11, 2020

Stable media is commonly physical disk storage, but other devices and certain caching facilities qualify as well. Many high-end disk subsystems provide high-speed cache facilities to reduce the latency of read and write operations. This cache is often supported by a battery-powered backup facility.

Servers

Servers Cache Media Hardware

Establishing software root of trust unconditionally

The Morning Paper

APRIL 2, 2019

In this context it means there are no external dependencies on e.g. secrets, trusted hardware modules, or special instructions (e.g. known good state of a trustworthy program). A d -degree polynomial can be evaluated in d steps in a Horner-rule program. carefully chosen computation over M and R and the nonce.

Software

Software Software Programming Hardware

24-core CPU and I can’t type an email (part one)

Randon ASCII

AUGUST 16, 2018

When a Windows program stops pumping messages there will be ETW events emitted to indicate exactly where this happened , so those types of hangs are trivial to find. Normally running every 6 ms is enough to make a program responsive, but for some reason it wasn’t making any progress. But apparently Chrome kept on pumping messages.

Programming

Programming Virtualization Code Processing

The Winds of Architecture Changes at the USENIX ATC 2019

ACM Sigarch

NOVEMBER 1, 2019

This blog post gives a glimpse of the computer systems research papers presented at the USENIX Annual Technical Conference (ATC) 2019, with an emphasis on systems that use new hardware architectures. GAIA proposed to expand the OS page cache into accelerator memory. ATC ’19 was refreshingly different. Heterogeneous ISA.

Architecture

Architecture Hardware Cache Storage