Re: [ECOS] Where is the scheduler's timer implemented?

["Roy E Richardson" <eng_at_play at cox dot net>]

The common source is in '\packages\kernel\current\src\common\clock.cxx'

By default the "timed" processes are "alarms", granularity of ticks, 10 Ms
There are also references to RTC timing granularities, but I have no 
experience
with their usage - see CYGVAR_KERNEL_COUNTERS_CLOCK, etc.

PS. For alarms, it is my personal opinion that the config option,
   CYGIMP_KERNEL_COUNTERS_SORT_LIST,
   should be enabled for best optimization of alarm processing,
   although that opinion is contrary to the provided default.


----- Original Message ----- 
From: "Santanu Chatterjee" <thisissantanu@gmail.com>
To: <ecos-discuss@ecos.sourceware.org>
Sent: Friday, September 30, 2005 11:13 PM
Subject: [ECOS] Where is the scheduler's timer implemented?


Hi all,

Could you please tell me which file contains the implementation of the
timer that is used by the scheduler in eCos? I don't think it
is the RTC that is being used by the scheduler. The scheduler's
timer must be of much higher resolution I think.

What I actually wish to understand is how exactly the scheduler is
invoked at the scheduling instants.

Thanks in advance for your time.

Regards,
Santanu Chatterjee

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