[PD] harddisc activity blocks sound playback

Norbert Math math at iem.kug.ac.at
Thu Sep 13 05:09:48 CEST 2001


hello,

sorry, this one is a bit off topic since it concerns
rme sound playback in linux in general...

i have sucessfully installed guenters oss rmexx driver which
(congratulations !!) comes officially with kernel 2.4.9

i can play back a single stereo soundfile, but
playback will stutter as long as the harddisc gets busier.
eg. i can't play 2 soundfiles simultaneosly under pd

i 've been playing around with many combinations of pd flags 
including realtime and pd suid root with no results. 
also doctoring around with hdparm didn't help.

maybe someone can give me a clue? i also tried to move the
card to another slot. i wonder if it is worth to try
out alsa now. 

win98: ok, but sound playback kept looping forever
until i forced the card to use irq 5. (yes - i could use 
pd under win98 as a last ressort, but i am not really
in the mood for it ...)

again, i would be very thankful for any suggestion.

norbert





the box is:
debian testing 2.4.9
one ide drive /dev/hda
e2fs on / reiserfs on /usr and /home
rme hammerfall light
athlon 1.4 GHz


hui:/home/norbert/pd/ac_hh# cat /proc/pci

PCI devices found:
  Bus  0, device   0, function  0:
    Host bridge: VIA Technologies, Inc. VT8363/8365 [KT133/KM133] (rev 3).
      Master Capable.  Latency=8.  
      Prefetchable 32 bit memory at 0xd0000000 [0xd7ffffff].
  Bus  0, device   1, function  0:
    PCI bridge: VIA Technologies, Inc. VT8363/8365 [KT133/KM133 AGP] (rev
0).
      Master Capable.  No bursts.  Min Gnt=12.
  Bus  0, device   7, function  0:
    ISA bridge: VIA Technologies, Inc. VT82C686 [Apollo Super South] (rev
64).
  Bus  0, device   7, function  1:
    IDE interface: VIA Technologies, Inc. Bus Master IDE (rev 6).
      Master Capable.  Latency=32.  
      I/O at 0xd000 [0xd00f].
  Bus  0, device   7, function  2:
    USB Controller: VIA Technologies, Inc. UHCI USB (rev 22).
      IRQ 5.
      Master Capable.  Latency=32.  
      I/O at 0xd400 [0xd41f].
  Bus  0, device   7, function  3:
    USB Controller: VIA Technologies, Inc. UHCI USB (#2) (rev 22).
      IRQ 5.
      Master Capable.  Latency=32.  
      I/O at 0xd800 [0xd81f].
  Bus  0, device   7, function  4:
    Host bridge: VIA Technologies, Inc. VT82C686 [Apollo Super ACPI] (rev
64).
      IRQ 11.
  Bus  0, device   7, function  5:
    Multimedia audio controller: VIA Technologies, Inc. AC97 Audio
Controller (rev 8
0).
      IRQ 11.
      I/O at 0xdc00 [0xdcff].
      I/O at 0xe000 [0xe003].
      I/O at 0xe400 [0xe403].
  Bus  0, device  12, function  0:
    Multimedia audio controller: PCI device 10ee:3fc4 (Xilinx, Inc.) (rev
8).
      IRQ 5.
      Master Capable.  Latency=32.  
      Non-prefetchable 32 bit memory at 0xdc000000 [0xdcffffff].
  Bus  0, device  13, function  0:
    Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139 (rev
16).
      IRQ 11.
      Master Capable.  Latency=32.  Min Gnt=32.Max Lat=64.
      I/O at 0xec00 [0xecff].
      Non-prefetchable 32 bit memory at 0xde000000 [0xde0000ff].
  Bus  1, device   0, function  0:
    VGA compatible controller: nVidia Corporation Vanta [NV6] (rev 21).
      IRQ 11.
      Master Capable.  Latency=32.  Min Gnt=5.Max Lat=1.
      Non-prefetchable 32 bit memory at 0xda000000 [0xdaffffff].
      Prefetchable 32 bit memory at 0xd8000000 [0xd9ffffff].

hui:/home/norbert/pd/ac_hh# hdparm -v /dev/hda

/dev/hda:
 multcount    = 16 (on)
 I/O support  =  0 (default 16-bit)
 unmaskirq    =  0 (off)
 using_dma    =  1 (on)
 keepsettings =  0 (off)
 nowerr       =  0 (off)
 readonly     =  0 (off)
 readahead    =  8 (on)
 geometry     = 5005/255/63, sectors = 80418240, start = 0

norbert at hui:~$ cat .pdrc 
-nomidi
-frags 1
-outchannels 8 
-inchannels 8
-verbose
-blocksize 1000
-path /home/norbert/pd/lib
-lib zexy







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