[LITMUS^RT] RFC: kernel-style events for Litmus^RT

[Björn Brandenburg]

On Feb 16, 2012, at 10:18 AM, Björn Brandenburg wrote:

> 
> On Feb 16, 2012, at 9:39 AM, Andrea Bastoni wrote:
> 
>>>> 
>>>> Chris, Glenn, Mac, and I are pro abandoning unit-trace for kernel visualization. Bjoern and Andrea, what do
>>>> you think about this? Going forward, I would see us dropping unit-trace for kernel visualization, but could
>>>> we replace sched_trace entirely in the long term? Would we want to?
>>> 
>>> As long as there is a tool to convert a trace in the new Linux format to a traditional sched_trace file I'm fine with ripping out the old implementation. At MPI, we use the feather-trace and sched-trace format for non-LITMUS^RT projects as well, so I'm not in favor of retiring all associated tools.
>> 
>> I'm for evaluating the new trace framework for a while, and then
>> decide whether we can substitute the sched_trace framework entirely.
>> In the meanwhile we can evaluate how easy it is to create converter(s)
>> for the traditional sched_trace file format.
>> I believe the maintenance overhead of keeping both the tracing
>> frameworks for a while shouldn't be very high (the only contact point
>> is in the sched_trace_XXX macros in include/litmus/sched_trace.h).
> 
> One of the advantages of the sched_trace format is its simplicity. It's easy to stick it into other systems. It's not so easy to stick Linux's tracing infrastructure into non-Linux projects. Instead of exporting Linuxisms to other projects, it's much easier to support LITMUS^RT  in Linux.

Ugh, I meant "to support sched_trace in LITMUS^RT".

- Björn