Brendan Gregg raised this question on Twitter: Cruel interview question: write a program on Solaris that sleeps for < 1 ms.
The first choice that springs to mind is nanosleep(3RT), but you'll be frustrated because your requested sleep interval is implemented in terms of the standard clock frequency, making you sleep for longer.
So how do you sleep (not busy wait!) for time periods shorter than the regular clock?
Adam Leventhal mentioned on twitter that he'd found my umem slab allocator port on macports. I commented that he might miss some of the umem debugging features that are available on its native Solaris platform in mdb, and we dreamed briefly of a portable version of mdb.
This weekend I took a peek at the mdb sources (via the Illumos Gate) to see how hard this might be. As it happens, this isn't the first time I've looked at porting mdb, so I was bit better prepared to go snooping around in there.
Updated: Added schema and UI for Projects to own repos and manage groups.
Following through on user repos and SSH, I revised the ACL support in mtrack and added a permissions editor for the repo editing screen. When you create a repo, it defaults to granting you (the creator) full access and denying everybody else access (equivalent to a private repo in services like Github and Bitbucket).
I've just pushed a somewhat experimental change to the default branch of mtrack that enables per-user repositories, repository forking, SSH key management, and SSH repository serving integration.
It's important to stress that this is preliminary in as much as restrictive controls are missing. There are some ACLs and rights around repo creation that are not yet implemented. Additionally, if you are using OpenID, any authenticated user will be able to add an ssh key and access the mtrack created repos (but nothing outside of that).
What you get in the current tip:
What you don't get (yet):
If you'd like to try these features, I'd love to hear your feedback. To update your instance:
$ hg pull $ php bin/schema-tool.php
Then navigate to help.php/SSH (source text) to read about setting up SSH.
Enjoy!
It's that time of the month... mtrack update time. Not a huge number of items to report on this time around, but it's a decently significant stepping stone--the schema management code takes us one step closer to an upgrade/deployment process.
It's time for another mtrack update; here's what's new:
I've been working on some changes to mtrack (a software development tracker implemented in PHP) this weekend, with a focus on improving the user experience for the mtrack administrator. To be brutally honest, it was at best a meagre experience for the administrator, but now things are better. They're still not perfect, but it should be a low enough bar to encourage more folks to play with mtrack. I've also spent a little bit of effort to add some caching to improve performance for certain pages.
For those that have tried it in the past, there's a brief summary of what's changed and a couple of screen shots below. This effort is in alignment with the roadmap that I published a little while ago.
Another OSCON is done. As usual, it was a great mix of folks and ideas across many different areas of OpenSource technology.
The most valuable track at these conferences (for me, at least) has become the hallway track. This is due in-part to my becoming a big-headed know-it-all; you pick up a lot of knowledge after you been to a good number of these conferences/conventions. But it is really important to me to be able to converse with fellow OpenSourcerors, whether they are working on the tools that I use on a daily basis or are working on something outside of my familiar tool box.
I like to think of OSCON as a melting pot for OpenSource; an excellent opportunity for cross-pollination between projects.
A particularly interesting development at OSCON this year was the announcement of a new Distributed Version Control System, under the Apache License (v2); it is called Veracity and is the product of SourceGear, LLC. This is interesting for me for a couple of reasons; the first is the license (wouldn't it be cool to embed DVCS to keep track of configuration information?), and the second is the feature set; they provide everything from source control through to distributed issue tracking. Veracity isn't done yet, but I'll be keeping an eye on it.
I'm also pleased to have shared Gimli at OSCON. Gimli is a crash tracing and analysis framework that provides watchdog and tracing support for Linux, Solaris and Darwin (OS/X) systems. You can find my slides on slideshare and find the Gimli project on bitbucket.
It was great to be at OSCON this year, especially with it being back in Portland, and I look forward to returning next year.
I wanted to share some of my thoughts on future development in mtrack, and solicit some feedback. Some of these are driven directly from user requests, and others are things that I've been thinking about on-and-off for a little while.
I really want to hear your thoughts, whether they relate to ideas and feature suggestions, or whether you have some experience or anecdotes on these topics.
I was hoping to avoid having to enable this as a feature, as I find the implementation approach taken in the original Trac to be sub-optimal, both in terms of run time efficiency and in terms of user experience when it comes to reporting on the custom fields.
Update: the session is complete; you can find the slides on slideshare.net and the code on bitbucket
I'm speaking at OSCON again with another new topic. This year, I'm spreading the news about Gimli, a Server Process Monitoring and Fault Analysis framework that I built at Message Systems and will be sharing with the world at OSCON.
In a nutshell, Gimli will supervise a process and capture an extensive crash trace (using DWARF 3 debugging information if possible) if the process crashes or wedges, and then restarts the process.
For more details on the OSCON session, check out the session details at OSCON.com.
As usual, I'm excited to attend; I still regard OSCON as the best OpenSource conference and greatly value the opportunity to catch up with fellow OpenSourcerors; I hope to see you there!