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by willjcroz
Sat Nov 12, 2011 11:26 am
Forum: The Staffroom
Topic: Inspirational people in Computer Science
Replies: 99
Views: 6873

Re: Inspirational people in Computer Science

<r>I vote for Simon Peyton Jones... (<URL url="http://en.wikipedia.org/wiki/S.....yton_Jones">http://en.wikipedia.org/wiki/S.....yton_Jones</URL>)<br/> <br/> One of the most engaging and accessible speakers I know of, his enthusiasm is infectious. He's already involved in the UK's CS schools curricu...
by willjcroz
Tue Oct 11, 2011 3:46 pm
Forum: General discussion
Topic: Weapon of choice?
Replies: 23
Views: 1809

Re: Weapon of choice?

<r>If one of the aims is to prepare the next generation for the challenges that will be faced in the software industry over the next decade or two, we need to recognise that many of the languages and paradigms in widespread use today are already falling short in many areas. Key to this is the idea t...
by willjcroz
Tue Sep 27, 2011 10:17 am
Forum: General discussion
Topic: Second Ethernet port needed!
Replies: 32
Views: 10656

Re: Second Ethernet port needed!

<r>Just a thought on the whole two ethernet port issue:<br/> <br/> USB will be great for expansion but you could set up a fully featured router using the single ethernet port anyway. You could have the RasPi plugged in (via ethernet) to your main router/4-port switch as if it were just another netwo...
by willjcroz
Mon Sep 26, 2011 10:44 am
Forum: Other projects
Topic: Optimizing Linux for Flash memory.
Replies: 26
Views: 79234

Re: Optimizing Linux for Flash memory.

<t>Quote from jamesh on September 26, 2011, 09:34<br/> So very odd results. I think I need a better test<br/> <br/> It looks like the remount operation is not dropping the FS caches and the cache is speeding up the tests as the test is repeated. Try something like:<br/> <br/> sync; echo 3 > /proc/sy...
by willjcroz
Fri Sep 16, 2011 11:36 am
Forum: General discussion
Topic: Data Transfer Performance Figures
Replies: 42
Views: 2522

Re: Data Transfer Performance Figures

<r>The important bit is that the filesystem partitions are aligned to a *multiple* of the flash erase block size. I think it should be pretty straightforward for any available SD card images to be aligned to say 1MiB blocks which should cover pretty much any SD cards available. The only thing is tha...
by willjcroz
Fri Sep 16, 2011 9:31 am
Forum: General discussion
Topic: Data Transfer Performance Figures
Replies: 42
Views: 2522

Re: Data Transfer Performance Figures

<t>Quote from jamesh on September 14, 2011, 12:40<br/> I also did some ramdisk to SD card tests, which is more of an indicator of the speed of the SD writing. Files much smaller as ramdisk limited to 32MB.<br/> <br/> 20480000 bytes (20MB) 0m2.271s<br/> 25600000 bytes (25MB) 0m13.027<br/> <br/> So th...
by willjcroz
Sat Sep 10, 2011 11:43 pm
Forum: Automation, sensing and robotics
Topic: TrakBerry / PiTrak
Replies: 0
Views: 1459

Re: TrakBerry / PiTrak

<r><br/> (image under Creative Commons by Martin Ling: <URL url="http://commons.wikimedia.org/w.....ground.jpg">http://commons.wikimedia.org/w.....ground.jpg</URL>)<br/> <br/> I came across my son's Bigtrak the other day and a big lightbulb switched on above my head. I'm sure he wouldn't mind if it ...
by willjcroz
Sat Sep 10, 2011 1:09 am
Forum: General discussion
Topic: Broadcom BCM2835 SoC
Replies: 196
Views: 19355

Re: Broadcom BCM2835 SoC

<r>Having taken a step back to do more reading here on the forums as well have a good think about some of the replies to my earlier posts I am of the position that proprietary drivery/library issues aside, this is one of the best projects around with regards to getting hackable kit into kids (and us...
by willjcroz
Thu Sep 01, 2011 7:07 pm
Forum: General discussion
Topic: Broadcom BCM2835 SoC
Replies: 196
Views: 19355

Re: Broadcom BCM2835 SoC

<r>Hi Liz,<br/> <br/> Thanks for the informed response, it certainly helps to get a picture of the situation you guys are working from. I did not realise that Broadcom were doing you such a favour and that without them this project would not be happening.<br/> <br/> Apologies for the possibly provoc...
by willjcroz
Thu Sep 01, 2011 4:51 pm
Forum: General discussion
Topic: Broadcom BCM2835 SoC
Replies: 196
Views: 19355

Re: Broadcom BCM2835 SoC

<r>Quote from Svartalf on September 1, 2011, 16:26<br/> In short, it wouldn't. And, as an observation from someone that's been instrumental in helping blaze new trails in the Linux community for well over a decade (Utah-GLX, Embedded Linux (yes...)), I will tell you that the pose you're taking isn't...
by willjcroz
Thu Sep 01, 2011 3:16 pm
Forum: General discussion
Topic: Broadcom BCM2835 SoC
Replies: 196
Views: 19355

Re: Broadcom BCM2835 SoC

<t>This is the classic issue of GPU/SoC vendor providing their GPU driver with an open source kernel 'shim' and 99% of the driver functionality (shader compilers etc) in a closed source binary userland blob.<br/> <br/> I understand that this is common practice in the embedded/SoC but to say that all...

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