The AnandTech Linux XBOX PC Experiment
by Kristopher Kubicki on November 10, 2004 4:00 PM EST- Posted in
- Linux
Distributed Rendering
Consumer distributed computing first became vogue in the mid 90's. While the NSA was busy simulating nuclear blasts on big iron, thousands of off-the-shelf computers a day were happily rendering frames for graphic artists. Even as Donald Becker and Thomas Sterling were coining the phrase, "Beowulf Cluster", people at Pixar and Alias were already well experienced in render scheduling on expensive SGI machines, but almost immediately, people began toying with the idea of splitting render jobs over multiple Windows NT machines. The Windows NT render farms were really the first Beowulf clusters used for anything important, and not surprisingly, there happens to be a lot of distributed rendering software out there. The process of rendering - that is taking a raw 3D data file and then raytracing it to produce a high quality image or set of images - happens to be very distributed computing friendly. Early render farms were very basic; if 100 frames needed to be rendered and 10 machines had render software, the host machine simply sent 10 frames to each computer and waited for them to render. Today's software is much more advanced, and network latencies are low enough that the host renderer can apply components of a frame to several different computers at once.There is some really excellent software like Rush Render Queue that will enable us to use software like Mental Ray for multiplatform rendering. Apple's QMaster also has some great features for distributed rendering for Shake. Today, however, we are just looking at a free ray tracer, POV-Ray. Below, you can see how our configurations ran under various options of the SMPOV addon for POV-Ray.
This test fringes theoretical. Since there are no Linux SMP or multiprocessor versions of POV-Ray, we had to improvise. POV-Ray allows us to render only a component of a scene if we desire, so using NFS we setup a directory where all the XBOX nodes had access the benchmark.ini files. Each file was modified to only render a specific portion of the scene based on the machine host name, and then the benchmark was launched via our scripts. We went through the same process for our Opteron and Xeon machines, launching one render process per processor, effectively running the renderer in SMP mode.
If our Distributed Compiling test was any forewarning, we weren't surprised that the XBOX cluster had a very difficult time being very effective here. Let's hope that the cluster can hold up a little better under encryption algorithms.
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Nepsir - Thursday, November 11, 2004 - link
I was just wondering if you will do a test with mental ray on the cluster (I think you mentioned something about Mental Ray in the article). It would be really interesting to see the results of that since me and a couple of friends got modded X-Boxes and I have a 3dsMax6 license (Mental Ray is included).gibson042 - Thursday, November 11, 2004 - link
You might want to look at the "mini-cluster" project (http://www.mini-itx.com/projects/cluster/) when planning/designing/building your EPIA cluster. It's a 12-node (originally 6) cluster developed by Glen Gardner, and appears to be the same size or a little smaller than a stack of an equal number of XBOXes. Of course, the frame is custom built and the hardware is exposed to the world.Aikouka - Thursday, November 11, 2004 - link
I can say that I love having a modded xbox, because the capabilities are so much greater. As discussed earlier, a software mod can be a great way to do it (although it usually requires a game unless you want to take your HDD out, which is NOT a fun method unless you love swapping IDE cables.)It's also good to note that you should be careful when modding these or even make a backup of the hdd on your system, because things can go wrong, and if you like to fiddle with things, then your chances will be a lot higher. I know at one point I was stuck in error 16 and had to pull the HDD out and unlock it using the IDE swap method.
Are there plans for an article on modding something such as the PS2? I just recently tried a no-solder modchip in the PS2, and it doesn't seem to be going along too well. Maybe it's time for a flip-top.
Scarceas - Thursday, November 11, 2004 - link
"We crimped our own cabling as you can see in the image below."I'm still looking for the image, I know its there somewhere!
bleugh - Thursday, November 11, 2004 - link
If anyone wants their xbox motherboards upgraded to 128 megabytes of memory, I can do itI'm UK based and use BRAND NEW samsung memory chips
I can upgrade your existing motherboards, sell you ready upgraded boards, or even just the chips!
if one of the anandtech team wants their xboxes upgraded i'll happily do it at cost, please contact me to discuss
Dean
LotoBak - Thursday, November 11, 2004 - link
First, XBox live banning....Basically this is how it used to work. When your on live it does a hash of your bios. A mod replaces your bios. If you bios is not the retail ms bios the serial (eeprom) is blacklisted. NOW since halo2 has been released it appears that MS has changed a while bunch of shit on us. Preliminary information indicates that MS is banning by hard drive serial+model numbers, xbox serial, and flagging the gamertag as 'potential pirate'. Thus to unban the xbox both a new hdd and eeprom are needed. Then you must cancel and create a new xbox live account. There are more details about how it all works but bottom line is we dont know how it works now. They can throw new stuff at us anytime now. Rumors are flying that hdd capacities are being scanned as well. For all intents and perposes xbox + modded xbox's do not mix.
Yes there is a PS1 emu for xbox. That said xbox DVD drives do not read cd-r (or retail ps1 games) Therefor all games must be transfered to the xbox hdd in bin/cue or iso format
When comparing mods remember, the mod contains no modded bios stuff. They are useless in them selves. You will need to aquire a modded bios for your xbox (online, free). What this means is that every mod can contain the same bios's. Therefor they all contain the same base features (mostly booting unsigned code). Hardware features and support is where you want to base your decision on. If you want cheap + no manufacterer support there are 10$ solutions around for you(enabled/disables with power button). If you want support with a mod with a few extra hardware features (2 bios's, external switch) that'll cost around 30-40. Fancy Shamcy lcd support, 8 bios banks, blah blah blah fancy external thing thoes are up to 75ish. But in the end they all allow you to run the same software on the xbox.
if you want to learn read some beginner tutorials at http://tutorials.xbox-scene.com
Omega215D - Thursday, November 11, 2004 - link
After seeing Halo 2, it makes me wonder if they really need Pixel Shader 2.0. Its pretty cool that I can play old games on the XBOx through emulators though but i wanna see when the next XBOX kicks off before spending $200.ViRGE - Wednesday, November 10, 2004 - link
#12, probably not. The Xbox's GPU is a GeForce 4 class GPU - the lack of Pixel Shader 2.0 features can really be limiting.euph - Wednesday, November 10, 2004 - link
is there any way to use the gpu for the pov-ray rendering?ukDave - Wednesday, November 10, 2004 - link
Little quote that sums up the SmartXX XBL saga:Q: just bought a Smart XX mod and I still don't know if i'll be able to play xbox live so please somebody tell me if i'll be able to play it.
A: There is no easy way to answer this question. First of all, it all depends on circumstance. Have you upgraded your hard drive? Has your Xbox ever been banned before? And, for newbs, are you thinking about playing on live while using a bios from the chip.
If you answered yes to any of these questions you've won a lifetime ban from Microsoft!
Sleep time :) And i don't even use XBL :D