[lttng-dev] real time Userspace RCU

[Michel Dagenais]

Indeed, all the relevant articles that I know on that topic were written by Paul. If your real-time tasks are on the read side of RCU, they should not block because of that. However, reclaiming the memory and the associated machinery that sometimes involves inter-processor interrupts may cause problems if you have "deep sub-milisecond" deadlines.

----- Mail original -----
> ----- On Mar 10, 2016, at 3:33 PM, Yuxin Ren ryx at gwmail.gwu.edu wrote:
> 
> > Thank you for your reply.
> > 
> > I want to generally understand how to apply urcu to real time systems.
> > I know real time system focus on predictability on both timing and
> > memory consumption.
> > So how does real time urcu support predictability?
> > Could you provide me some papers, documents or any materials about any
> > aspect of real time urcu?
> 
> Adding Paul E. McKenney in CC, who may have some thoughts on this
> topic.
> 
> Thanks,
> 
> Mathieu
> 
> > 
> > Thanks again!
> > 
> > On Thu, Mar 10, 2016 at 1:52 PM, Michel Dagenais
> > <michel.dagenais at polymtl.ca> wrote:
> >> Real-time and embedded systems is an important current focus for the LTTng
> >> toolchain research. Do you have specific needs for userspace RCU?
> >>
> >> ----- Mail original -----
> >>> Hi,
> >>>
> >>>  Is there any work or research about Userspace RCU on real time or
> >>> embedded systems?
> >>> Any information is welcome.
> >>>
> >>> Thanks a lot!
> >>> Yuxin
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> >>>
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> 
> --
> Mathieu Desnoyers
> EfficiOS Inc.
> http://www.efficios.com
>