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

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

Adrian Cockcroft

JUNE 21, 2022

The early days at Sun Cambridge were special, I absorbed a lot about networking and the technical side of the role from my fellow systems engineer Martin Baines, and we were driving all over the region in cool company cars (I had a Citroen BX 16V) selling a really hot product.

Tuning 52

Tuning Benchmarking Engineering C++ 52

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

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

The Morning Paper

APRIL 2, 2019

That is to say, even in the presence of persistent malware e.g. in the firmware of peripheral controllers, network interface cards, disk and USB controllers, and so on, root of trust can assure us that the system has booted into a known and trusted state (or alternatively, uncover the presence of malware with high probability).

Software 40

Software Software Programming 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

ScaleOut Software

JULY 27, 2018

A bigger problem with query is that when it matches many results, a large amount of data may need to be returned over the network to the requesting client for processing, as illustrated below. This can quickly saturate the network (and bog down the client).

Scalability 40

Scalability Cache Airlines Healthcare 40

ScaleOut Software

JULY 27, 2018

A bigger problem with query is that when it matches many results, a large amount of data may need to be returned over the network to the requesting client for processing, as illustrated below. This can quickly saturate the network (and bog down the client).

Scalability 40

Scalability Cache Airlines Healthcare 40

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

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. Network I/O? 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

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

SQL Server According to Bob

JANUARY 11, 2020

url=/library/en-us/fileio/fs/sparse_files.asp ) ​​ on the ​​ Microsoft Developer Network ​​ (MSDN). 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

We believe that making these GPU resources available for everyone to use at low cost will drive new innovation in the application of highly parallel programming models. The early GPU systems were very vendor specific and mostly consisted of graphic operators implemented in hardware being able to operate on data streams in parallel.Â

AWS 136

AWS Latency Programming Architecture 136

High Scalability

NOVEMBER 25, 2019

To add elasticity, reliability and durability, these data centers are connected to Google Cloud platform using high speed, secure Google Interconnect network. Java/Python mostly and some small services in Go/C. We also put these nodes on a faster network compared to other nodes and we still aren't done with this problem :).

Architecture 52

Architecture Cache Azure Storage 52