Daniel Lemire

FEBRUARY 8, 2019

The division by a power of two ( / (2 N )) can be implemented as a right shift if we are working with unsigned integers, which compiles to single instruction: that is possible because the underlying hardware uses a base 2. I make my benchmarking code available. What if d is a constant, but not known to the compiler? Can we do better?

C++ 279

C++ Benchmarking Hardware Testing 279

Brendan Gregg

MARCH 16, 2024

Apart from library code, maybe your application doesn't have frame pointers either, in which case everything is broken. 2005-2023: The winter of broken profilers However, the change was then applied to x86-64 (64-bit) as well, which had sixteen registers and didn't benefit so much from a seventeenth.

Java 137

Java Cache Google Hardware 137

Sutter's Mill

DECEMBER 29, 2011

Now welcome to the hardware jungle. From 1975 to 2005, our industry accomplished a phenomenal mission: In 30 years, we put a personal computer on every desk, in every home, and in every pocket. In 2005, however, mainstream computing hit a wall. The free lunch is over. Galaxy S II, Droid X2, iPhone 4S). There’s no going back.

Hardware 40

Hardware Games Operating System Software 40

SQL Server According to Bob

JUNE 3, 2016

My development collogues and I are starting a regular blog series, outlining the vast range of scalability improvements, allowing SQL Server 2016 to run across a wide array of hardware configurations, faster and better than previous releases of SQL Server. Try SQL Server 2016 Today. Table of Contents.

Hardware 40

Hardware Software Engineering Transportation Scalability 40

Brendan Gregg

AUGUST 8, 2017

Nowadays, the source code to old operating systems can also be found online. Linux is also hard coding the 1, 5, and 15 minute constants. This state is used by code paths that want to avoid interruptions by signals, which includes tasks blocked on disk I/O and some locks. This, too, was a dead end. This, too, was a dead end.

Latency 111

Latency Metrics C++ Systems 111

SQL Server According to Bob

JANUARY 11, 2020

As ​​ the ​​ administrator of a SQL Server 2005 installation, ​​ you will find that ​​ visibility into ​​ the ​​ SQL Server ​​ I/O ​​ subsystem ​​ has been ​​ significantly increased.

Servers 40

Servers Cache Database Media 40

SQL Server According to Bob

DECEMBER 18, 2018

Before all was said and done, all of these people and more helped with various activities: · Eugene, Mike, Slava, Scott, Peter, Steve and others doing code reviews on my SQL Server and Host Extension changes. · Red Hat, SUSE, HPE, Intel helping and confirming Linux behaviors and making file system code changes. Device Flush.

Servers 90

Servers Media Cache Storage 90