Linked by Thom Holwerda on Sat 8th Apr 2006 18:38 UTC
Hardware, Embedded Systems As expected processor licensor ARM Holdings and Handshake Solutions NV, a Royal Philips Electronics subsidiary, have developed an asynchronous processor based on the ARM9 core. The ARM996HS is thought to be the first commercial clockless processor and is being described as particular suited to use as an automotive microcontroller. Because clockless processors consume zero dynamic power when there is no activity, they can significantly extend battery life compared with clocked equivalents.
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RE[3]: somewhat dubious
by geist on Sun 9th Apr 2006 01:12 UTC in reply to "RE[2]: somewhat dubious"
geist
Member since:
2005-07-11

We could say that the CPU may at times be doing negligible work, but I doubt it ever really "stops".

It does. Perhaps only for 10 milliseconds or so, but there are huge swaths of time where there is nothing to do, and thus the idle thread is usually run. Typically the idle thread in most OSes does a little bit of housekeeping and then just halts the cpu until the next interrupt (network packet, keypress, timer, etc). On mobile devices this is doubly important, to save power.

Reply Parent Score: 2

RE[4]: somewhat dubious
by hobgoblin on Sun 9th Apr 2006 11:27 in reply to "RE[3]: somewhat dubious"
hobgoblin Member since:
2005-07-06

but, iirc, only in windows NT or maybe 2000 did microsoft add proper support for this. in windows 9x and older, they would just send dummy commands to the cpu when there was nothing to do...

Reply Parent Score: 1