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2012-12-17 09:34 <viric> can it be that the nanonote is faster than the raspberry pi (for non fp code, of course)
2012-12-17 09:34 <viric> ?
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2012-12-17 10:58 <larsc> I doubt it
2012-12-17 10:59 <larsc> as far as I know the cpu freq of the rpi is twice that of the nanonote. And usually ARM is not a factor two slower than MIPS when it comes to instructions per clock cycle
2012-12-17 10:59 <viric> ok
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2012-12-17 12:01 <wpwrak> viric: did anyone make such a claim ? or was this just speculation ?
2012-12-17 12:03 <viric> my speculation
2012-12-17 12:03 <viric> I've seen the nanonote quite capable, and the pi a bit slow. But maybe I simply gave too different jobs to them
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2012-12-17 12:17 <wpwrak> the display resolution may also make a difference. the ben has only a few pixels to move.
2012-12-17 12:19 <larsc> yea, I have seen ben like hardware connected to a 800x600 display, it wasn't pretty ;)
2012-12-17 12:21 <viric> I've been only compiling
2012-12-17 12:21 <viric> I've 'openssl speed' numbers somewhere
2012-12-17 12:21 <viric> of both.
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2012-12-17 15:06 <DocScrutinizer05> compiling is 90% IO
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2012-12-17 15:08 <DocScrutinizer05> IO in turn is massively depending on your actual hw design, like in "ZX81 computed during the VSYNC period of display only, other time the RAM been busy with video buffer readout"
2012-12-17 15:09 <DocScrutinizer05> well, odd example since that's not even IO
2012-12-17 15:11 <DocScrutinizer05> but anyway I guess you get the picture, regarding using a RAMdisk vs slow MMC flash storage raped by constant swapping and thus slowing down to <1 IOPS for real file access
2012-12-17 15:12 <DocScrutinizer05> the latter commonly known as swap hell on e.g. Nokia N900
2012-12-17 15:14 <DocScrutinizer05> compiler runs are *very* prone for running into swap hell on any architecture that has small amounts of RAM, compared to filesize of the compiled project
2012-12-17 15:15 <DocScrutinizer05> -j 64 doesn't help either ;-)
2012-12-17 15:18 <wpwrak> -j 64 at least makes the situation obvious ;-)
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2012-12-17 15:31 <qi-bot> [commit] Werner Almesberger: libubb/: helper library for UBB access (master) http://qi-hw.com/p/ben-blinkenlights/2c52dac
2012-12-17 15:31 <qi-bot> [commit] Werner Almesberger: swuart/: half-duplex software UART for UBB (WIP) (master) http://qi-hw.com/p/ben-blinkenlights/4689882
2012-12-17 15:31 <qi-bot> [commit] Werner Almesberger: swuart/: use a hardware timer and allow full-duplex operation (master) http://qi-hw.com/p/ben-blinkenlights/8816dcf
2012-12-17 15:33 <larsc> gpio uart?
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2012-12-17 16:59 <wpwrak> yeah
2012-12-17 16:59 <wpwrak> and in user space
2012-12-17 17:00 <wpwrak> well, with the usual dirty tricks :)
2012-12-17 17:00 <wpwrak> for example, i turn off interrupts while sending/receiving
2012-12-17 17:02 <wpwrak> of course, it's not perfect. i.e., it has to be ready and polling when a new byte arrives. in a typical request-response dialog, that is normally no problem, but if you have fully independent operation, it would lose receive data
2012-12-17 17:05 <wpwrak> what the full-duplex capability does is that it allows responses to begin while still sending. e.g., an echo or maybe in the future xon/xoff flow control
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2012-12-17 18:19 <DocScrutinizer05> roh: you've been the rider or the driver of Rudi? ;-D
2012-12-17 18:26 <DocScrutinizer05> ooh, didi senft ... http://www.stern.de/panorama/raddesigner-didi-senft-rentierfahrrad-begeistert-berlin-1942361.html
2012-12-17 18:33 <roh> 'touristenscheisse'
2012-12-17 18:41 <viric> DocScrutinizer05: hm yes, a lot of IO.
2012-12-17 18:42 <DocScrutinizer05> roh: yup ;-P
2012-12-17 18:43 <DocScrutinizer05> roh: nevertheless I seen two guys with hoods on a weird bike... Instantly thought of you and gismo, you both looked similar in a certain way on Camp
2012-12-17 18:43 <DocScrutinizer05> ;-)
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2012-12-17 21:05 <wpwrak> wolfspraul: btw, how about adding "antorcha" to the commit notifications on this channel ? http://projects.qi-hardware.com/index.php/p/antorcha/
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