On 12/14/11 15:42, Dave Phillips wrote:
On 12/14/2011 08:58 AM, Jeremy Jongepier wrote:
On 12/14/11 13:55, Dave Phillips wrote:
The relevant entries in /etc/security/limits.conf
@audio - rtprio 99
@audio - nice -10
@audio - memlock unlimited
You could check /etc/security/limits.d/99-audio-conf
I wonder though if both files exist if they don't conflict. What does
ulimit -r -m output?
It checks out:
[dlphilp@BigBlack ~]$ ulimit -r -m
real-time priority (-r) 99
max memory size (kbytes, -m) unlimited
Hello Dave,
So the correct settings get picked up, they should have otherwise you
couldn't run JACK with your current settings.
The hardware is an M-Audio Delta 66 system, with a separate preamp. Some
relevant JACK (0.121.3) settings :
/usr/bin/jackd -P89 -t5000 -dalsa -dhw:0 -r48000 -p128 -n2 -Xseq
The seq driver can cause xruns. You can rule it out as a possible
cause by using a2jmidid.
Ah, okay, it's removed. I'll test later this afternoon, can't use the
recorder at the moment.
I usually get two or three xruns per half-hour session, as compared to 0
with 64 Studio. Btw, I'm not comparing the distros, just the performance
stats. I have no interest in returning to older systems, but I have much
interest in improving the ones I'm running now.
This bothers me :
[dlphilp@BigBlack etc]$ cat /proc/interrupts
CPU0
0: 50 IO-APIC-edge timer
1: 4 IO-APIC-edge i8042
7: 1 IO-APIC-edge parport0
8: 2 IO-APIC-edge rtc0
9: 0 IO-APIC-fasteoi acpi
12: 6 IO-APIC-edge i8042
14: 0 IO-APIC-edge pata_amd
15: 27164 IO-APIC-edge pata_amd
16: 788897 IO-APIC-fasteoi ICE1712, nvidia <---- Ouch !!!
17: 144 IO-APIC-fasteoi firewire_ohci
20: 49995 IO-APIC-fasteoi ohci_hcd:usb2
21: 87877 IO-APIC-fasteoi sata_nv
22: 2124 IO-APIC-fasteoi sata_nv, hda_intel
23: 82436 IO-APIC-fasteoi ehci_hcd:usb1, eth0
Yep, that's my video card. Can I reassign the IRQ - preferably via
software - for one of those devices ?
No, afaik only if your system supports MSI and it looks like it
doesn't (unless you didn't post the whole output). But I'm no expert
on this so I could be mistaken. You could try swapping ports for the
ICE1712.
I'm considering it. IIRC there are only two or three PCI slots on the
mobo, and the nVidia card is in a PCIe slot.
know about the rtirq script but there seems to little information
regarding its use with a kernel such as mine (Rui ?).
With your current non-rt kernel you have to use the threadirqs kernel
option. From then on you could install rtirq from AUR though that's
not the most recent version so you might have to modify the PKGBUILD.
I planned on using the latest from Rui's site, it's dated October 2011.
The 3.0-rt kernel from AUR works amazingly well afaics, but I didn't
stretch test it yet.
I'll check it out asap.
What DE are you using?
Xfce4
Not a super-heavy DE. Did you try the latencytop tool? Could be helpful
to figure out what's lagging. And did you try adjusting the swappiness
of your system? And setting noatime for your filesystems?
Thanks for the suggestions, Jeremy. I'm going to run some tests now.
Best,
dp
Best,
Jeremy
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