Re: [LAU] Too many xruns

I've been trying to reduce my xrun troubles. I'm down from > 10 xruns per second to something more like 10 xruns per minute. Still not good, but better. I used the realTimeConfigQuickScan.pl script to diagnose things. https://code.google.com/p/realtimeconfigquickscan/ I'm down to three things reported as "not good" now. 1. Checking checking sysctl inotify max_user_watches... < 524288 - not good increase max_user_watches by adding 'fs.inotify.max_user_watches = 524288' to /etc/sysctl.conf and rebooting For more information, see http://wiki.linuxmusicians.com/doku.php?id=system_configuration#sysctl.conf Looking at the link there's a comment, "...it remains very unclear ... if adjusting this value actually does anything at all." So, I haven't altered this. Does anyone have experience saying that this helped them? 2. chrt: failed to set pid 0's policy: Operation not permitted Checking the ability to prioritize processes with chrt... no - not good Could not assign a 80 rtprio value. Set up limits.conf. For more information, see http://wiki.linuxmusicians.com/doku.php?id=system_configuration#limits.conf I did make the changes outlined at the above link. I still get the above report. I'm going to guess that I need some real-time support from the kernel to make this work. Which brings me to 3. Kernel with Real-Time Preemption... not found - not good Kernel without real-time capabilities found For more information, see http://wiki.linuxmusicians.com/doku.php?id=system_configuration#installing_… First I looked at this link: http://wiki.linuxmusicians.com/doku.php?id=system_configuration#the_kernel Specifically, I looked at the threadirqs kernel option. grep -e CONFIG_IRQ_FORCED_THREADING=y -e CONFIG_PREEMPT=y /boot/config-`uname -r` produces "CONFIG_IRQ_FORCED_THREADING=y" and I think that's good. I altered my /boot/grub2/grub.cfg file to include "threadirqs" on the stanza for my kernel, like so, but without all the line breaks. linux /boot/vmlinuz-3.5.5-2.fc17.x86_64 root=UUID=77edf07a-a49b-48dd-82c8-2f9e5c8691b7 ro nomodeset rd.md=0 rd.lvm=0 rd.dm=0 SYSFONT=True KEYTABLE=us rd.luks=0 LANG=en_US.UTF-8 rhgb quiet threadirqs nouveau.modeset=0 rd.driver.blacklist=nouveau "uname -r" reports "3.5.5-2.fc17.x86_64" but I don't have threaded IRQs. Any ideas on how to improve my IRQs? They are not alterable in the BIOS. Thanks.... -- Kevin