Messages in this thread | | | From | (Victor Yodaiken) | Date | Sun, 20 Jul 1997 05:59:50 -0600 | Subject | Re: The i2o Bus: A Conspiracy Against Free Software? (fwd) |
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On Jul 20, 8:13am, Rogier Wolff wrote: Subject: Re: The i2o Bus: A Conspiracy Against Free Software? (fwd) >Low interrupt latency? Yes! The I960CA can be executing instructions >from your interrupt routine (NMI) about 100ns after the interrupt line >goes active.
But if the 960 is simply running the i2o or similar i/o subsystem, the latency between the interrupt assertion and a useful response may increase greatly --- not to mention that the 960 will be running a MS written mini-os that may not be exceptionally speedy.
Since it is obvious that MS wants to move into RT control, I wonder how their RT strategy will deal with these "intelligent" i/o subsystems. In particular, they have a source license to Radisys to do something that seems similar to RT-Linux using IRMX as the rt kernel (the info releases from Radisys are vague on what they are exactly doing).
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