[PlanetCCRMA] audio breaking and cpu load?

Oded Ben-Tal oded at ccrma.Stanford.EDU
Sat Feb 27 07:37:40 PST 2010


Here are the first few lines of top the variation is fairly large so I 
took 2 snapshots more or less the ranges I see.
  jast jack
   PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
  3244 oded      20   0  154m  14m  11m S 11.2  0.4   0:15.45 jackd.bin
  2505 root      20   0  334m  58m 9.8m S  2.6  1.5   0:09.31 Xorg
    69 root     -51  -5     0    0    0 S  1.7  0.0   0:00.45 IRQ-20
    68 root     -51  -5     0    0    0 S  1.3  0.0   0:00.94 IRQ-19

   PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
  3244 oded      20   0  154m  14m  11m S 41.2  0.4   0:22.55 jackd.bin
    69 root     -51  -5     0    0    0 S  3.3  0.0   0:00.62 IRQ-20
  2505 root      20   0  334m  58m 9.8m S  2.3  1.5   0:09.72 Xorg
  2908 oded      20   0 26280  12m 8448 S  1.0  0.3   0:00.86 metacity

; now with pd
  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
  3244 oded      20   0  154m  14m  11m S 48.2  0.4   0:38.88 jackd.bin
  3303 oded      20   0 93048  17m 9712 R 13.9  0.4   0:04.53 pd
  2505 root      20   0  343m  67m 9.9m S  4.6  1.7   0:13.40 Xorg
  3304 oded      20   0 14160 7392 4612 S  3.0  0.2   0:01.57 pd-gui
    69 root     -51  -5     0    0    0 S  2.6  0.0   0:01.79 IRQ-20
  2908 oded      20   0 26372  12m 8448 S  1.3  0.3   0:01.37 metacity

   PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
  3244 oded      20   0  154m  14m  11m S 28.4  0.4   1:10.04 jackd.bin
  3303 oded      20   0 93328  18m 9752 R 17.2  0.5   0:31.70 pd
  2505 root      20   0  337m  61m   9m S 10.6  1.6   0:22.25 Xorg
  3304 oded      20   0 14160 7500 4636 S  5.3  0.2   0:09.45 pd-gui
    69 root     -51  -5     0    0    0 S  2.3  0.0   0:04.63 IRQ-20
    68 root     -51  -5     0    0    0 S  1.0  0.0   0:05.45 IRQ-19
    21 root     -50  -5     0    0    0 S  0.7  0.0   0:00.25 sirq-net-rx/1
  2918 oded      20   0 22616 9180 5596 S  0.7  0.2   0:02.83 
imsettings-appl

; Pd running but no patch opened. Still constant DIO errors reported.
    PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
  3244 oded      20   0  154m  14m  11m S 13.8  0.4   1:49.78 jackd.bin
  3303 oded      20   0 87576  13m 9760 S  3.0  0.3   1:01.87 pd
  2505 root      20   0  334m  58m  10m S  1.0  1.5   0:35.56 Xorg
  3315 oded      20   0  2560 1116  844 R  1.0  0.0   0:02.37 top
    68 root     -51  -5     0    0    0 S  0.7  0.0   0:08.59 IRQ-19
  2918 oded      20   0 22616 9204 5596 S  0.7  0.2   0:04.07 
imsettings-appl
  2993 oded      20   0 26648 7900 6760 S  0.7  0.2   0:01.63 
multiload-apple
  3216 oded      20   0 90412  24m  18m S  0.7  0.6   0:05.46 qjackctl
    23 root     -50  -5     0    0    0 S  0.3  0.0   0:06.46 
sirq-tasklet/1
  1997 dbus      20   0  3280 1380  732 S  0.3  0.0   0:00.73 dbus-daemon

In short I get Synch errors when Pd isn't doing anything. I then tried to 
see what happens if I just playback a file from Pd and I did hear the 
sound break. For comparison I tried Snd which was able to play a file 
normally (unless I tried to change anything like resize the window)

any clues?



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