The following script (if ~ is in NFS) will demonstrate the problem. The
two pactl processes both try to acquire the lock on the file
simultaneously, and whichever one loses will take thirty seconds before
it wins, because of the needless contention (and the unfortunate facts
of how lockd in NFS works).
!/bin/bash
NUM_PROCS=2
procs=()
for i in $(seq 1 $NUM_PROCS); do
pactl list > /dev/null &
procs[$i]=$!
done
for i in $(seq 1 $NUM_PROCS); do
wait ${procs[$i]}
done
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https://bugs.launchpad.net/bugs/817269
Title:
Pulseaudio lock of pulsecookie file is pessimal on NFS
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