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

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

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? Adoption by the TPC.

Benchmarking 62

Benchmarking Open Source C++ Cache 62

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

Tech News Gather

AUGUST 25, 2022

The platform is based on a purpose-oriented programming language that is simple to learn. There are several quick and configurable widgets available. Unlike other programs, it is compatible with both iOS and Android. Management fees, cost per resource, and hourly rates are among the payment methods available to the organisation.

Development 52

Development Hardware Mobile Open Source 52

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

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. The second placement looks better as each CPU is given its own L1/L2 caches, and we make better use of the two L3 caches available.

Cache 251

Cache Latency Airlines Logistics 251

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.

C++ 40

C++ Hardware Programming Cloud 40

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 | |. This example instrumented one of many thousands of available events. There's no filter.

Latency 68

Latency C++ Cache Programming 68

The Netflix TechBlog

APRIL 17, 2019

264/AVC, currently, the most ubiquitous video compression standard supported by modern devices, often in hardware. AOM has produced the reference software for AV1, which is called libaom and is available online. The first successful digital video standard was MPEG-2, which truly enabled digital transmission of video.

Open Source 166

Open Source Scalability Speed Efficiency 166

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

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

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

ScaleOut Software

JULY 27, 2018

Hosted on commodity clusters or cloud infrastructures, IMDGs harness the power of distributed computing to deliver scalable storage capacity and access throughput, along with integrated high availability. Looking beyond distributed caching, it’s their ability to perform data-parallel analysis that gives IMDGs such exciting capabilities.

Scalability 40

Scalability Cache Airlines Healthcare 40

ScaleOut Software

JULY 27, 2018

Hosted on commodity clusters or cloud infrastructures, IMDGs harness the power of distributed computing to deliver scalable storage capacity and access throughput, along with integrated high availability. Looking beyond distributed caching, it’s their ability to perform data-parallel analysis that gives IMDGs such exciting capabilities.

Scalability 40

Scalability Cache Airlines Healthcare 40

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

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

SQL Server According to Bob

DECEMBER 18, 2018

Linux may need similar utilities to control various hardware cache installations. Filesystem Type 1K-blocks Used Available Use% Mounted on. You should always validate the Fua capabilities with your device and hardware vendor. Fua = Forced Unit Access. Fua is the standard used to issue an I/O write command in stable data storage.

Servers 90

Servers Media Cache Storage 90

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. He mentions major changes, but not the load average change. kernel/sched.c.orig Fri Oct 29 10:31:11 1993 kernel/sched.c

Latency 111

Latency Metrics C++ Systems 111

John McCalpin

JANUARY 22, 2018

Since “peak performance” for the processor is two (512-bit SIMD) FMA instructions per cycle, any instructions that are not FMA instructions subtract directly from the available peak performance. Timers and hardware performance counters are measured immediately outside the loop, where their overhead is negligible.

Latency 40

Latency Hardware Code Testing 40

SQL Server According to Bob

JANUARY 11, 2020

​​ Various defragmentation ​​ utilities ​​ are ​​ available ​​ on the market today. Character POS ASCII Value Formula Value A 1 65 67 B 2 66 68 Checksum 135 Now assume ​​ that ​​ the string was stored on disk but when read back it was “AC”.

Servers 40

Servers Cache Database Media 40

All Things Distributed

NOVEMBER 15, 2010

This incredible power is available for anyone to use in the usual pay-as-you-go model, removing the investment barrier that has kept many organizations from adopting GPUs for their workloads even though they knew there would be significant performance benefit. The different stages were then load balanced across the available units.

AWS 136

AWS Latency Programming Architecture 136

High Scalability

NOVEMBER 25, 2019

Always be available: Have a service level circuit breaker and a circuit breaker by customer. We changed deployment in the middle of the week for both work-life balance and also this way we would have all engineers available in case release runs into an issue. Java/Python mostly and some small services in Go/C. Cloud Platform.

Architecture 52

Architecture Cache Azure Storage 52