On Mon, Jun 4, 2012 at 12:56 PM, Igor Stasenko <siguctua@gmail.com> wrote:
i just wonder, what takes so much CPU time, even if it completely idle...
The basic issue is the idle process that spins doing a yield instead of blocking. Basically, instead of ioRelinquishProcessorForMicroseconds the VM should enter a blocking call that will terminate when the next delay or i/o event occurs. This requires rearchitecting delays because currently the VM polls for delay expiry. For the VM to block while a delay is active there must be a delay callback/signal/interrupt etc that has the side-effect of terminating the blocking call.
4831- NBCog 4.8 51519- NBCog 3.5
if i kill a UI process, the load goes down to 2.5-3 % ... still too much.
i would like to know how we can minimize this. The reason why i concerned is straightly pragmatic: extending battery life..
i found that if i run completely on battery.. it depleting quite fast with VM running (and i don't do anything just coding, i.e not running benchmarks, but more thinking and typing).
-- Best regards, Igor Stasenko.
-- best, Eliot