Openmoko Bug #1729: pulseaudio consumes 6% cpu time constantly

[Openmoko Public Trac]

#1729: pulseaudio consumes 6% cpu time constantly
---------------------+------------------------------------------------------
 Reporter:  lindi    |       Owner:  openmoko-devel
     Type:  defect   |      Status:  new           
 Priority:  normal   |   Milestone:                
Component:  unknown  |     Version:                
 Severity:  normal   |    Keywords:                
 Blocking:           |   Blockedby:                
---------------------+------------------------------------------------------
 Steps to reproduce:
 1) boot the system

 Expected results:
 1) system should be mostly idle

 Actual results:
 1) pulseaudio consumes 6% cpu time according to top.

 More info:
 1) I am using
  http://buildhost.openmoko.org/daily/freerunner/200807/20080722/Openmoko-
 openmoko-devel-image-glibc-ipk-P1-Snapshot-20080722-om-gta02.rootfs.jffs2
 http://buildhost.openmoko.org/daily/freerunner/200807/20080730/uImage-2.6.24+git25+8533927964761f4e2078ccd8607b90f5acc60b93-r1
 -om-gta02.bin

 on freerunner.

 2) strace -p `pidof pulseaudio` -f -o /tmp/s -s245 -tt shows the following
 patterns:

 {{{
 1381  22:15:42.054924 SYS_298(0x8001, 0x411d3cfc, 0x2, 0x1000, 0x3952634c)
 = 0
 1381  22:15:42.058088 SYS_298(0x8001, 0x411d3d62, 0x1, 0x1800, 0x4ccc8) =
 0
 1381  22:15:42.059321 ioctl(17, 0xc0844123, 0x4e668) = 0
 1381  22:15:42.061548 ioctl(17, 0xc0844123, 0x4e668) = 0
 1381  22:15:42.062966 ioctl(17, 0xc0844123, 0x4e668) = 0
 1381  22:15:42.064297 ioctl(17, 0xc0844123, 0x4e668) = 0
 1381  22:15:42.065431 ioctl(17, 0xc0844123, 0x4e668) = 0
 1381  22:15:42.066598 SYS_298(0x8001, 0x411d3cfc, 0x2, 0x1000, 0x39527000)
 = 0
 1381  22:15:42.071400 SYS_298(0x8001, 0x411d3d62, 0x1, 0x1800, 0x4ccc8) =
 0
 1381  22:15:42.072529 ioctl(17, 0xc0844123, 0x4e668) = 0
 1381  22:15:42.073744 ioctl(17, 0xc0844123, 0x4e668) = 0
 1381  22:15:42.075161 ioctl(17, 0xc0844123, 0x4e668) = 0
 1381  22:15:42.076298 ioctl(17, 0xc0844123, 0x4e668) = 0
 1381  22:15:42.077434 ioctl(17, 0xc0844123, 0x4e668) = 0
 1381  22:15:42.078697 SYS_298(0x8001, 0x411d3cfc, 0x2, 0x1000, 0x39528000)
 = 0
 1381  22:15:42.083701 SYS_298(0x8001, 0x411d3d62, 0x1, 0x1800, 0x4ccc8) =
 0
 1381  22:15:42.084831 ioctl(17, 0xc0844123, 0x4e668) = 0
 1381  22:15:42.086077 ioctl(17, 0xc0844123, 0x4e668) = 0
 1381  22:15:42.087488 ioctl(17, 0xc0844123, 0x4e668) = 0
 1381  22:15:42.088713 ioctl(17, 0xc0844123, 0x4e668) = 0
 1381  22:15:42.091026 ioctl(17, 0xc0844123, 0x4e668) = 0
 }}}

 and

 {{{
 # ls -l /proc/1381/fd/17
 lrwx------    1 root     root           64 Aug  2 22:16 /proc/1381/fd/17
 -> /dev/snd/pcmC0D0p
 }}}

 shows that it is really talking to the sound card.

-- 
Ticket URL: <https://docs.openmoko.org/trac/ticket/1729>
docs.openmoko.org <http://docs.openmoko.org/trac/>
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