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Old 06-03-2007, 06:18 PM   #1
Rockgod1969
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Registered: Jan 2007
Posts: 54

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Low Latency Kernel


So I download the Planet Ccrma low latency kernal and Jack via yum, and am trying to follow the directions from http://www.redhatmagazine.com/2007/0...fedora-core-6/

but when I go to /usr/share/doc/jack-audio-connection-kit-0.103.0/ there is no README.fedora file.

I keep trying to get low latency, but I get a ton of xruns. it should work on my computer, I have a HP DV9000 with tons of memory.


My /etc/security/limits.conf file looks like:


# /etc/security/limits.conf
#
#Each line describes a limit for a user in the form:
#
#<domain> <type> <item> <value>
#
#Where:
#<domain> can be:
# - an user name
# - a group name, with @group syntax
# - the wildcard *, for default entry
# - the wildcard %, can be also used with %group syntax,
# for maxlogin limit
#
#<type> can have the two values:
# - "soft" for enforcing the soft limits
# - "hard" for enforcing hard limits
#
#<item> can be one of the following:
# - core - limits the core file size (KB)
# - data - max data size (KB)
# - fsize - maximum filesize (KB)
# - memlock - max locked-in-memory address space (KB)
# - nofile - max number of open files
# - rss - max resident set size (KB)
# - stack - max stack size (KB)
# - cpu - max CPU time (MIN)
# - nproc - max number of processes
# - as - address space limit
# - maxlogins - max number of logins for this user
# - maxsyslogins - max number of logins on the system
# - priority - the priority to run user process with
# - locks - max number of file locks the user can hold
# - sigpending - max number of pending signals
# - msgqueue - max memory used by POSIX message queues (bytes)
# - nice - max nice priority allowed to raise to
# - rtprio - max realtime priority
#
#<domain> <type> <item> <value>
#

#* soft core 0
#* hard rss 10000
#@student hard nproc 20
#@faculty soft nproc 20
#@faculty hard nproc 50
#ftp hard nproc 0
#@student - maxlogins 4

# or (default) allow everyone access
@Audio - rtprio 99
@Audio - nice -10
@Audio - memlock 2000000



# End of file
 
Old 06-03-2007, 09:18 PM   #2
studioj
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you have to adjust jack settings to larger buffer first thing and see if it helps
 
Old 06-04-2007, 03:12 PM   #3
Rockgod1969
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Registered: Jan 2007
Posts: 54

Original Poster
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Tried that already.

delay of 154.000 usecs exceeds estimated spare time of 42.000; restart ...
delay of 154.000 usecs exceeds estimated spare time of 42.000; restart ...
delay of 153.000 usecs exceeds estimated spare time of 42.000; restart ...
delay of 149.000 usecs exceeds estimated spare time of 42.000; restart ...
delay of 154.000 usecs exceeds estimated spare time of 42.000; restart ...
delay of 153.000 usecs exceeds estimated spare time of 42.000; restart ...
15:12:55.921 Client deactivated.
15:12:55.921 JACK is stopping...
jack main caught signal 15
WARNING: 8 message buffer overruns!
15:12:56.137 JACK was stopped successfully.
 
Old 06-05-2007, 12:52 PM   #4
studioj
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Registered: Oct 2006
Posts: 460

Rep: Reputation: 31
you don't tell us anything.
what is the samplerate what is the frames/period
and you just give us a little incoplete version of output.
Can't we at least see the whole output or is it just a guessing contest ?

i've said it before here but need to say again we are not mind readers or soothsayers here.
without information and evidence nothing can be understood.
 
  


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