Messages in this thread | | | Date | Fri, 23 Jul 1999 13:27:34 -0600 | From | yodaiken@chelm ... | Subject | Re: real-time threaded IO with low latency (audio) |
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On Fri, Jul 23, 1999 at 03:06:27PM -0400, Paul Barton-Davis wrote: > > the soundcard ADAC might look like a file, and it might be represented > by a node in a filesystem, but it isn't a file. a device like an ADAC, > or a serial port, or a parallel port, or a network interface, isn't > capable of being bypassed by the page cache - its essentially a bit > bucket. the i/o subsystem's efforts on behalf of such devices can be > precisely nil - bytes sent to them are never available for retrieval > unless the hardware itself does something funky.
So you need high speed copy memory<->device_memory and what else? What do I need to have in RTL to make it easy for you to use?
> no, we/i don't need it for disk i/o. we need it for output to an ADAC. > i don't know where the locks are that i referred to above, but i know > that mingo and andrea and maybe even dave miller have confirmed their > existence when Benno first started discussing his latency test.
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