change log for rtems (2011-05-26)
joel.sherrill at OARcorp.com
Wed Sep 26 13:51:47 UTC 2012
On 09/26/2012 08:48 AM, Sebastian Huber wrote:
> On 09/26/2012 03:40 PM, Joel Sherrill wrote:
>> On 09/26/2012 07:00 AM, Sebastian Huber wrote:
>>> What has this change to do with SMP inter-process communications? Why do we
>>> update _Thread_Time_of_last_context_switch in case
>>> __RTEMS_USE_TICKS_FOR_STATISTICS__ is defined?
>> At least I can explain this part of the change. There were technically
>> two changes in that commit. They got merged into one and the comment
>> doesn't reflect that.
>> If you don't set the _Thread_Time_of_last_context_switch, then the
>> statistics for rate monotonic periods are not completely right. You
>> need to account for how long the current task has been running.
> Ok, but then the rate-monotonic statistics do not honor the
> __RTEMS_USE_TICKS_FOR_STATISTICS__. I currently don't have time to look at
> this more detailed, but I think something is mixed up here.
Where do they not honor that? I see it used in a number of
rate monotonic files:
Joel Sherrill, Ph.D. Director of Research& Development
joel.sherrill at OARcorp.com On-Line Applications Research
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