Adam,
thanks for your replies!
"Adam 'WeirdArms' Wiggins" awiggins@cse.unsw.edu.au writes:
Question here. Is Jochen's L4 got higher interupt latencies then fiasco due to masking out interupts or is time in the kernel small enough for real time applications.
Our measurements with L4/x86 version 2 indicate that this kernel is not suitable for real-time work. The ``Taming Linux'' pager details some of these concerns URL:http://os.inf.tu-dresden.de/papers_ps/part98.ps. Recently, Torsten Paul did a series of measurements which show that L4/x86 often can't meet real-time requirements; the task_delete operation seems to be especially bad, sometimes disabling interrupts for more than one second.
(Torsten, if you're reading this: Is this data correct?)
Real-time requirements in our DROPS system are one reason why Fiasco tries to be interruptible at almost any time.
Michael