Archive for the ‘Miscellaneous’ Category

Turtles on the Wire: Understanding how the OS uses the Modern NIC

The modern networking card (NIC) has evolved quite a bit from the simple Ethernet cards of yesteryear. As such, the way that the operating system uses them has had to evolve in tandem. Gone are the simple 10 Mbit/s copper or (BNC) devices. Instead, 1 Gb/s is common-place in the home, 10 Gb/s rules the [...]

Posted on September 15, 2016 at 10:06 am by rm · Permalink · Comments Closed
In: Miscellaneous

illumos day 2014

Saturday September 27th was illumos day 2014, hosted as a follow on to Surge 2014. illumos day was really quite nice and it was a good gathering of both folks who have been in the community for some time, and those who were just getting started. I was able to record the talks and so [...]

Posted on October 1, 2014 at 10:47 am by rm · Permalink · Comments Closed
In: Miscellaneous

illumos Overlay Networks Development Preview 01

At Joyent I’ve been spending my time designing and building support for network virtualization in the form of protocols like VXLAN. I’ve gotten far enough along that I’m happy to announce the first SmartOS developmental preview of this work. The goal of this is to just give something for folks to play around with and [...]

Posted on July 25, 2014 at 6:08 pm by rm · Permalink · Comments Closed
In: Miscellaneous

DLPI and the IP Fastpath

The series so far If you’re getting started you’ll want to see the previous entries on Project Bardiche: Project Bardiche: Introduction Project Bardiche: vnd Architecture Project Bardiche: Framed I/O The illumos Networking Stack This blog post is going to dive into more detail about what the ‘fastpath’ is in illumos for networking, what it means, [...]

Posted on April 3, 2014 at 8:22 am by rm · Permalink · Comments Closed
In: Miscellaneous

Project Bardiche: Framed I/O

The series so far If you’re getting started you’ll want to see the previous entries on Project Bardiche: Project Bardiche: Introduction Project Bardiche: vnd Architecture Background Framed I/O is a new abstraction that we’re currently experimenting with through Project Bardiche. We call this framed I/O, because the core concept is what we call a frame: [...]

Posted on March 25, 2014 at 8:57 am by rm · Permalink · Comments Closed
In: Miscellaneous

Userland CTF in DTrace

We at Joyent use DTrace for understanding and debugging userland applications just as often as we do for the kernel. That is part of the reason why we’ve worked on things like flamegraphs, the Node.js ustack helper, and the integration of libusdt in node module’s like restify and bunyan. I’ve just put back some work [...]

Posted on November 14, 2013 at 12:54 pm by rm · Permalink · Comments Closed
In: Miscellaneous

mdb tab completion

Last October, the first illumos hack-a-thon took place. Out of that a lot of interesting things were done and have since been integrated into illumos. Two of the more interesting gems were Adam Leventhal and Matt Ahrens adding dtrace -x temporal and Eric Schrock adding the DTrace print() action. Already print() is in the ranks [...]

Posted on May 15, 2012 at 11:38 am by rm · Permalink · Comments Closed
In: Miscellaneous

illumos Hardware Compatibility List

One of the challenges when using any Operating System is answering the question ‘Is my hardware supported?’. To track this down, you often have to scour Internet sites, hoping someone else has already asked the question, or do other, more horrible machinations – or ask someone like me. If you’re running on an illumos-based system [...]

Posted on May 10, 2012 at 6:00 pm by rm · Permalink · Comments Closed
In: Miscellaneous

Figuring out where you’re longjmp(3c)ing with DTrace

Last Monday was the illumos hack-a-thon. There, I worked with Matt Amdur on adding tab completion support to mdb — the illumos modular debugger. The hack-a-thon was wildly successful and a lot of fun, I hope to put together an entry on the hack-a-thon and give an overview of the projects that were worked on [...]

Posted on October 29, 2011 at 6:28 pm by rm · Permalink · Comments Closed
In: DTrace, longjmp, mdb, Miscellaneous

Hello, world!

Welcome to this humble blog. I’m currently an engineer on the Fishworks team. I’ll have some interesting things to talk about from the work I do. Before that I graduated from Brown’s CS Department. During my time there I did research with Prof. Tom Doeppner, I helped run the TA Program, and TAed several courses, [...]

Posted on October 10, 2010 at 1:05 pm by rm · Permalink · Comments Closed
In: Miscellaneous