10 messages in org.freebsd.freebsd-multimediaRe: IRQ problem (was Re: IRQ timing) | From | Sent On | Attachments |
|---|---|---|
| Luigi Rizzo | Aug 30, 1997 9:29 am | |
| David E. Cross | Aug 30, 1997 5:56 pm | |
| Amancio Hasty | Aug 30, 1997 7:58 pm | |
| Luigi Rizzo | Aug 30, 1997 8:52 pm | |
| Luigi Rizzo | Aug 30, 1997 9:23 pm | |
| Amancio Hasty | Aug 30, 1997 10:01 pm | |
| Amancio Hasty | Aug 30, 1997 10:22 pm | |
| Amancio Hasty | Aug 30, 1997 10:45 pm | |
| David E. Cross | Aug 30, 1997 11:28 pm | |
| Amancio Hasty | Aug 31, 1997 2:39 am |
| Subject: | Re: IRQ problem (was Re: IRQ timing) | |
|---|---|---|
| From: | Amancio Hasty (has...@rah.star-gate.com) | |
| Date: | Aug 30, 1997 10:22:42 pm | |
| List: | org.freebsd.freebsd-multimedia | |
From The Desk Of Luigi Rizzo :
We need a little bit more of information: o OS version o is the card using auto dma? o dma channels being used for the sound card o name of the app o buffer size used in in the application
i guess you also need the blocksize -- the size of each DMA transfers -- and not only the total amount of buffers.
True but bear in mind that the system has plenty of memory:
--- Copyright (c) 1992-1997 FreeBSD Inc. Copyright (c) 1982, 1986, 1989, 1991, 1993 The Regents of the University of California. All rights reserved.
FreeBSD 2.2-STABLE #0: Sat Aug 30 21:51:37 EDT 1997 ro...@phoenix.its.rpi.edu:/usr/src/sys/compile/PHOENIX CPU: Pentium (132.96-MHz 586-class CPU) Origin = "GenuineIntel" Id = 0x52c Stepping=12 Features=0x1bf<FPU,VME,DE,PSE,TSC,MSR,MCE,CX8> real memory = 67108864 (65536K bytes) avail memory = 62734336 (61264K bytes)
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I would hope that the OSS driver has the heuristics to allocate sufficient memory for the buffers.
At any rate, if David downloads: ftp://rah.star-gate.com/pub/mmap_test.c and just prints the buffer size and the number of buffers that the sound driver has we can eliminate the possibility that the sound driver did not allocate sufficient buffers
Cheers, Amancio