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. When we need to execute any program, it should be loaded into memory first. Here, memory is divided into equal sizes of partitions where the code of a program resides.

Programming 81

Programming C++ Database Virtualization 81

The Morning Paper

MAY 12, 2019

An open-source benchmark suite for microservices and their hardware-software implications for cloud & edge systems Gan et al., The paper examines the implications of microservices at the hardware, OS and networking stack, cluster management, and application framework levels, as well as the impact of tail latency. ASPLOS’19.

Open Source 61

Open Source Hardware Benchmarking Systems 61

Sutter's Mill

FEBRUARY 13, 2017

I don’t get to Europe very often apart from ISO C++ standards meetings, but this spring I’ve been able to accept invitations for two English-language European events in the last week of April. Tue-Thu Apr 25-27: High-Performance and Low-Latency C++ (Stockholm).

Latency 51

Latency C++ Hardware Performance 51

ACM Sigarch

OCTOBER 12, 2020

These, let’s call them metal languages , include FORTRAN (introduced in 1957), C (1972), and C++ (1985). Programmers continue to write applications in them, and they continue to evolve: the just approved C++20 standard is the latest example. Despite their age, these languages are far from dead! As Leiserson et al.

C++ 108

C++ Benchmarking Hardware Architecture 108

Randon ASCII

OCTOBER 4, 2020

It is desirable for a program to be able to go to sleep and then wake up a little while later. The answer is hardware interrupts. The OS programs a timer chip that then triggers an interrupt that wakes up the CPU and the OS can then schedule your thread. Timer interrupts and their raison d’être. Decades of madness.

Programming 145

Programming Games Hardware Operating System 145

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. What is HammerDB? Why HammerDB was developed.

Benchmarking 62

Benchmarking Open Source C++ Cache 62

O'Reilly

SEPTEMBER 15, 2021

Our audience is particularly strong in the software (20% of respondents), computer hardware (4%), and computer security (2%) industries—over 25% of the total. Given the difficulty of hiring expertise from outside, we expect an increasing number of companies to grow their own ML and AI talent internally using training programs.

Azure 145

Azure Social Media Programming AWS 145

Tech News Gather

AUGUST 25, 2022

The platform is based on a purpose-oriented programming language that is simple to learn. Unlike other programs, it is compatible with both iOS and Android. Because the development is built on a single codebase, it saves time when testing the program across many platforms. Hardware Costs. Dedicated Hiring Model.

Development 52

Development Hardware Mobile Open Source 52

Percona

AUGUST 18, 2023

The original motivation for FB was due to different hardware generations, especially between regions/data centers. for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., AFAIK Facebook does this.

Programming 82

Programming Servers Database Hardware 82

Sutter's Mill

JUNE 16, 2011

Yesterday I had the privilege of talking about some of the work we’ve been doing to support massive parallelism on GPUs in the next version of Visual C++. The video of my talk announcing C++ AMP is now available on Channel 9. If they are, then one programming model should be able to address them all. More to come…

C++ 40

C++ Hardware Programming Cloud 40

The Morning Paper

MAY 23, 2019

These techniques work well for scientific programs that are dominated by arrays. However, they are ineffective on object-based programs because objects do not fall neatly into fixed-size blocks and have a more irregular layout. If we compress objects instead of cache lines though, we can get to a 56% compression ratio (c).

Cache 61

Cache Benchmarking Hardware Java 61

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. Both mobile and web front ends call an Application Program Interface (API) that is managed by an API proxy. The next layer is operating system platforms, what flavor of Linux, what version of Windows etc.

Engineering 137

Engineering Serverless Lambda AWS 137

The Netflix TechBlog

JUNE 4, 2019

The idea CFS operates by very frequently (every few microseconds) applying a set of heuristics which encapsulate a general concept of best practices around CPU hardware use. We formulate the problem as a Mixed Integer Program (MIP). Conclusion If any of this piques your interest, reach out to us!

Cache 251

Cache Latency Airlines Logistics 251

Brendan Gregg

AUGUST 18, 2019

C @ns: [256, 512) 10900 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ | [512, 1k) 18291 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@| [1k, 2k) 4998 |@@@@@@@@@@@@@@ | [2k, 4k) 57 | | [4k, 8k) 117 | | [8k, 16k) 48 | | [16k, 32k) 109 | | [32k, 64k) 3 | |. The probe is BEGIN , a special probe that runs at the beginning of the program (like awk).

Latency 68

Latency C++ Cache Programming 68

Sutter's Mill

APRIL 14, 2011

Scott Meyers, Andrei Alexandrescu and I are continuing to craft and announce the technical program for C++ and Beyond (C&B) 2011 , and two more sessions are now posted. All talks are brand-new material created specifically for C&B 2011. Here are short blurbs; follow the links for longer descriptions.

C++ 40

C++ Programming Strategy Scalability 40

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 56

Hardware Programming Media Storage 56

ACM Sigarch

APRIL 8, 2019

Not all computer science degree programs offer computer architecture classes to undergrads, and ones that do, may offer it as one of many electives. This is arguably a fundamentally hard problem for computer architecture, but efforts towards open source hardware (eg. Lack of Exposure. gem5 ) are baby steps towards this goal.

Architecture 74

Architecture Open Source Hardware Software Engineering 74

Nick Desaulniers

OCTOBER 24, 2018

Typically, when we modify a program, we’d like to run it to verify our changes. Before booting a compiled Linux kernel image on actual hardware, it can save us time and potential headache to do a quick boot in a virtual machine like QEMU. It will seem that there’s no output, and QEMU isn’t responding to ctrl+c. enable-kvm.

C++ 56

C++ Hardware Virtualization Systems 56

Adrian Cockcroft

JUNE 21, 2022

I became the Sun UK local specialist in performance and hardware, and as Sun transitioned from a desktop workstation company to sell high end multiprocessor servers I was helping customers find and fix scalability problems. We had specializations in hardware, operating systems, databases, graphics, etc. that a lot of people used.

Tuning 52

Tuning Benchmarking Engineering C++ 52

Brendan Gregg

SEPTEMBER 25, 2021

Was there some other program consuming CPU, like a misbehaving Ubuntu service that wasn't in CentOS? As a Xen guest, this profile was gathered using perf(1) and the kernel's software cpu-clock soft interrupts, not the hardware NMI. As (C) looked like a kernel rebuild, I started with (D) and (E). ## 5. us on Centos and 0.68

Speed 126

Speed Java AWS Virtualization 126

Nick Desaulniers

APRIL 6, 2020

“War stories” in programming are entertaining tales of truly evil bugs that kept you up at night. 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. halt_loop: while ( true ). Welcome to hell, kids.

C++ 67

C++ Hardware Code Virtualization 67

The Netflix TechBlog

APRIL 17, 2019

264/AVC, currently, the most ubiquitous video compression standard supported by modern devices, often in hardware. However, rav1e is written in Rust programming language, whereas an encoder written in C has a much broader base of potential developers. The success was repeated by H.264/AVC,

Open Source 166

Open Source Scalability Speed Efficiency 166

Nick Desaulniers

MAY 30, 2016

Three C/C++ programmers walk into a bar. Simultaneously, they’re all right, but they’re also all wrong (and need a lesson about portable C code). One of the first few programs a programmer might write after hello world is something like this: 1. When they run that program, they see: 1. What the hell is going on?

C++ 59

C++ Programming Code Hardware 59

The Morning Paper

JANUARY 28, 2020

If you want a lightweight, fast-starting, easy to program for, embeddable application runtime that also offers isolation, then a natural choice is V8 isolates. Entry/exit in/out of V8 contexts is less expensive than hardware-based isolation mechanisms, keeping request processing latency low and throughput high. High performance.

Serverless 99

Serverless Storage Latency Cloud 99

Randon ASCII

FEBRUARY 25, 2018

In this particular investigation, which spanned twenty months, we suspected hardware failure, compiler bugs, linker bugs, and other possibilities. Jumping too quickly to blaming hardware or build tools is a classic mistake, but in this case the mistake was that we weren’t thinking big enough. failure rate.

Programming 79

Programming Hardware Cache Code 79

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. Implementation.

Software 40

Software Software Programming Hardware 40

Testsigma

JUNE 19, 2020

testing and is integratable with multiple programming languages (i.e. There are various disadvantages of using Selenium(we will discuss it later), one of them is that it requires strong technical knowledge about programming language because it’s script can only be written with the help of programming languages like Java, Python etc.

Testing Tools 60

Testing Tools Testing Open Source Java 60

Brendan Gregg

SEPTEMBER 25, 2021

Was there some other program consuming CPU, like a misbehaving Ubuntu service that wasn't in CentOS? As a Xen guest, this profile was gathered using perf(1) and the kernel's software cpu-clock soft interrupts, not the hardware NMI. As (C) looked like a kernel rebuild, I started with (D) and (E). Ubuntu is 5x slower.

Speed 52

Speed Java AWS Virtualization 52

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). multi-tasking & concurrent programming. high-color image raster.

Hardware 55

Hardware Games Java Media 55

John McCalpin

NOVEMBER 5, 2016

In the latest (October 2016) revision of Intel’s Instruction Extensions Programming Reference , Intel has disclosed a fairly dramatic departure from these “traditional” approaches. Notes on notation: C[i][j] is invariant in the innermost loop, so I refer to the values in the accumulator as elements of the C array.

Cache 40

Cache C++ Latency Hardware 40

The Morning Paper

SEPTEMBER 12, 2019

SQL provides a declarative programming interface, below which the system itself can figure out the most effective execution plans based on data size and statistics, layout, compute hardware etc. The implementations require both SQL and also some UDFs written in C++. Be careful what you ask for (materialize).

Network 44

Network Database Programming Hardware 44

Brendan Gregg

SEPTEMBER 25, 2021

Was there some other program consuming CPU, like a misbehaving Ubuntu service that wasn't in CentOS? As a Xen guest, this profile was gathered using perf(1) and the kernel's software cpu-clock soft interrupts, not the hardware NMI. As (C) looked like a kernel rebuild, I started with (D) and (E). ## 6. us on Centos and 0.68

Speed 40

Speed Java AWS Virtualization 40

ScaleOut Software

JULY 27, 2018

The technique is called data-parallel computing , and many IMDGs (like ScaleOut StateServer Pro ®) provide APIs that make it easy to use in languages like Java, C#, and C++. This would enable the application to avoid bottlenecks and harness the IMDG’s scalable computing power to boost performance.

Scalability 40

Scalability Cache Airlines Healthcare 40

ScaleOut Software

JULY 27, 2018

The technique is called data-parallel computing , and many IMDGs (like ScaleOut ComputeServer ®) provide APIs that make it easy to use in languages like Java, C#, and C++. This would enable the application to avoid bottlenecks and harness the IMDG’s scalable computing power to boost performance.

Scalability 40

Scalability Cache Airlines Healthcare 40

Brendan Gregg

AUGUST 8, 2017

TABLE OF EXP(-T/C) FOR T = 5 SEC. EXPFF: EXP 0.920043902 ;C = 1 MIN EXP 0.983471344 ;C = 5 MIN EXP 0.994459811 ;C = 15 MIN. 90491 N|rnberg (Germany) Consulting+Networking+Programming+etc'ing 42. kernel/sched.c.orig Fri Oct 29 10:31:11 1993 kernel/sched.c Yes, I'd say so. They aren't idle.

Latency 111

Latency Metrics C++ Systems 111

SQL Server According to Bob

DECEMBER 18, 2018

Linux may need similar utilities to control various hardware cache installations. You should always validate the Fua capabilities with your device and hardware vendor. To accommodate a wide range of installations and hardware required four (4) options across SQL Server and the HE. Fua = Forced Unit Access. Device Flush.

Servers 90

Servers Media Cache Storage 90

John McCalpin

JANUARY 22, 2018

Hardware performance counter results for a simple benchmark code calling Intel’s optimized DGEMM implementation for this processor (from the Intel MKL library) show that about 20% of the dynamic instruction count consists of instructions that are not packed SIMD operations (i.e., addl $1, %eax vfmadd213pd %zmm16, %zmm17, %zmm29.

Latency 40

Latency Hardware Code Testing 40