Not logged in
Log in now
Create an account
Subscribe to LWN
Pencil, Pencil, and Pencil
Dividing the Linux desktop
LWN.net Weekly Edition for June 13, 2013
A report from pgCon 2013
Little things that matter in language design
Interview with Andrew Tanenbaum (LinuxFr.org)
Posted Nov 18, 2011 0:31 UTC (Fri) by cmccabe (guest, #60281)
The other dimension to performance is realtime guarantees, which Minix can't provide. So overall, I think AT is just whistling in the dark here.
Posted Nov 18, 2011 8:45 UTC (Fri) by marcH (subscriber, #57642)
To do what? Un-compress and display a video recipe from Youtube? Please be serious. I'm talking "Mega"/cheap and you answer "Giga"; you are off-topic.
Do you have any idea what is the cost of 1 MIPS in the low range nowadays? Answer: totally negligible compared to the rest of the SoC. And not just in dollars but in terms of power and real estate just as well.
Backtracking: yes, the extra performance cost of a micro-kernel would not make any difference to your microwave oven.
Posted Nov 19, 2011 3:30 UTC (Sat) by k8to (subscriber, #15413)
Posted Dec 1, 2011 10:42 UTC (Thu) by wookey (subscriber, #5501)
Posted Nov 18, 2011 14:10 UTC (Fri) by jonth (subscriber, #4008)
And what's a REALLY embedded system and why don't phones or tablets count as one?
Posted Nov 18, 2011 15:04 UTC (Fri) by marcH (subscriber, #57642)
Thanks for demonstrating what you are missing from the picture.
Performance wise smartphones and tablets are much much closer to PCs than to: microwave ovens, vacuum cleaners, washing machines, traffic lights, alarms, vending machines, most industrial machines, etc.
Posted Nov 18, 2011 15:17 UTC (Fri) by jonth (subscriber, #4008)
A phone is just as embedded as a washing machine. Mobile devices come in many flavours, not just smartphones. Even within the smartphone segment there is more to the system than just the apps processor. Trust me, the modem processor in any phone is resource limited. And them some.
For _any_ embedded product there should be a processor sized/priced correctly, from a PIC up to an ARM Cortex. If you're using an ARM7 to power a washing machine then fine, you're not resource limited. But you're also using an over-designed processor for the job.
Posted Nov 22, 2011 21:49 UTC (Tue) by JanC_ (guest, #34940)
Posted Nov 23, 2011 10:42 UTC (Wed) by mpr22 (subscriber, #60784)
Posted Nov 23, 2011 18:03 UTC (Wed) by andreasb (subscriber, #80258)
If you need low pin count packages then boy did NXP announce some interesting chips for you. How about Cortex-M SoCs in SO20 and TTSOP20? I bet you're just going to love the one in a DIP28.
Seriously, if all you want is under 50 edge pins (something like QFP48) then there's lots of choice in the 32 bit ARM world.
Posted Nov 23, 2011 19:19 UTC (Wed) by mpr22 (subscriber, #60784)
Copyright © 2013, Eklektix, Inc.
Comments and public postings are copyrighted by their creators.
Linux is a registered trademark of Linus Torvalds