Brendan Gregg

MARCH 16, 2024

I'm sure this delivered large performance improvements and I wouldn't try arguing against it. 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. The actual overhead depends on your workload.

Java 145

Java Cache Google Hardware 145

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. Thus if 2 N / d has been precomputed, you can compute the division n/d as a multiplication and a shift. Can we do better?

C++ 279

C++ Benchmarking Hardware Testing 279

Brendan Gregg

NOVEMBER 29, 2017

Hardware virtualization for cloud computing has come a long way, improving performance using technologies such as VT-x, SR-IOV, VT-d, NVMe, and APICv. The latest AWS hypervisor, Nitro, uses everything to provide a new hardware-assisted hypervisor that is easy to use and has near bare-metal performance.

Virtualization 111

Virtualization AWS Hardware Storage 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 Performance

JANUARY 23, 2020

"Waitstats helps us identify performance-related counters. But waits information by itself isn't enough to accurately diagnose performance problems. The queues component of our methodology comes from Performance Monitor counters, which provide a view of system performance from a resource standpoint.".

Tuning 115

Tuning Servers Monitoring Hardware 115

All Things Distributed

SEPTEMBER 20, 2013

Not everybody agreed that the "N-ary Storage Model" (NSM) was the best approach for all workloads but it stayed dominant until hardware constraints, especially on caches, forced the community to revisit some of the alternatives. Many of the modern high-performance data warehouses such as Amazon Redshift are based on column stores.

Storage 90

Storage Hardware Cache C++ 90

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