[RTEMS Project] #2554: New watchdog handler implementation

RTEMS trac trac at rtems.org
Thu Feb 18 19:58:16 UTC 2016

#2554: New watchdog handler implementation
 Reporter:  sebastian.huber  |       Owner:  sebastian.huber
     Type:  enhancement      |      Status:  accepted
 Priority:  normal           |   Milestone:  4.12
Component:  cpukit           |     Version:  4.12
 Severity:  normal           |  Resolution:
 Keywords:                   |

Comment (by joel.sherrill):

 I am not opposed to the use of RB Trees or the use of 64 bit time for
 absolute/calendar time.

 I would like to see us move away from ticks on the relative timer and move
 to something more like CLOCK_MONOTONIC based on uptime.

 I assume the new ticks key value will be the "watchdog ticks since boot"
 value to trigger the watchdogs on. I think this is really still OK based
 on the math but limits the durations one can delay and the granularity.

 The extra granularity may allow us to move to a tickless or variable clock
 tick in the future. Although I am still concerned that reprogramming the
 timer on the fly is potentially more dangerous and error prone than a
 fixed tick.

Ticket URL: <http://devel.rtems.org/ticket/2554#comment:4>
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