Redundant Logging on User Extensions

[Joel Sherrill]

On 10/29/2014 4:01 PM, Gedare Bloom wrote:
> On Wed, Oct 29, 2014 at 2:42 PM, Joel Sherrill
> <joel.sherrill at oarcorp.com> wrote:
>> Hi
>>
>> As Jennifer has reviewed the output from an SMP capture
>> test, it is clear that something which was no big deal in
>> the old fixed record uniprocessor version is now an issue.
>> Most extensions have an "actor" and "acted upon" thread.
>> For example, when a task is created, the calling task and
>> new task are important. The actor and acted upon threads
>> were logged in separate records.
>>
>> In an SMP system sorted by time, these two records can
>> become disconnected. Since we now have variable length
>> records, it makes sense to consolidate these into a single
>> capture record.
>>
>> Any complaints?
>>
> You probably want to support multiple ways to view the capture log,
> including sorting by core, or by some notion of "system call" e.g. the
> entire chain of events for a single thread creation.
Agreed but in this case there are two records used to represent one logical
event like "task A created task B" or "task A restarted task B". We just
want
to combine two records into one in the log.

How it is sorted for display purposes is a user interface issue.
> -Gedare
>
> On Wed, Oct 29, 2014 at 2:42 PM, Joel Sherrill
> <joel.sherrill at oarcorp.com> wrote:
>> Hi
>>
>> As Jennifer has reviewed the output from an SMP capture
>> test, it is clear that something which was no big deal in
>> the old fixed record uniprocessor version is now an issue.
>> Most extensions have an "actor" and "acted upon" thread.
>> For example, when a task is created, the calling task and
>> new task are important. The actor and acted upon threads
>> were logged in separate records.
>>
>> In an SMP system sorted by time, these two records can
>> become disconnected. Since we now have variable length
>> records, it makes sense to consolidate these into a single
>> capture record.
>>
>> Any complaints?
>>
>> --
>> Joel Sherrill, Ph.D.             Director of Research & Development
>> joel.sherrill at OARcorp.com        On-Line Applications Research
>> Ask me about RTEMS: a free RTOS  Huntsville AL 35805
>> Support Available                (256) 722-9985
>>
>> _______________________________________________
>> devel mailing list
>> devel at rtems.org
>> http://lists.rtems.org/mailman/listinfo/devel

-- 
Joel Sherrill, Ph.D.             Director of Research & Development
joel.sherrill at OARcorp.com        On-Line Applications Research
Ask me about RTEMS: a free RTOS  Huntsville AL 35805
Support Available                (256) 722-9985