Hi Jeanette, thank you for your advice.
On 18.07.2018 18:49, Jeanette C. wrote:
for a start, do look at /proc/interrupts as suggestd by the script.
CPU0 CPU1 CPU2 CPU3 CPU4 CPU5
CPU6 CPU7
0: 22 0 0 0 0 0
0 0 IO-APIC 2-edge timer
1: 0 0 0 0 0 0
195 0 IO-APIC 1-edge i8042
8: 0 0 0 0 0 0
0 1 IO-APIC 8-edge rtc0
9: 0 6144 0 0 0 0
0 0 IO-APIC 9-fasteoi acpi
12: 0 0 0 0 0 499
0 0 IO-APIC 12-edge i8042
16: 0 0 31 0 0 0
0 0 IO-APIC 16-fasteoi ehci_hcd:usb1
23: 0 0 0 35 0 0
0 0 IO-APIC 23-fasteoi ehci_hcd:usb2
24: 0 55975374 0 0 753 0
0 0 PCI-MSI 327680-edge xhci_hcd
25: 22 0 0 0 0 0
0 0 PCI-MSI 1572864-edge rtsx_pci
26: 0 14018 0 0 0 0
350867 0 PCI-MSI 512000-edge ahci[0000:00:1f.2]
27: 0 0 0 0 122 0
0 581368 PCI-MSI 2097152-edge enp4s0
28: 0 0 748 1746778 0 0
0 0 PCI-MSI 32768-edge i915
29: 0 0 0 18 0 0
0 0 PCI-MSI 360448-edge mei_me
31: 0 0 0 0 0 12035
0 0 PCI-MSI 2621440-edge iwlwifi
32: 0 0 0 0 0 0
89 0 PCI-MSI 49152-edge snd_hda_intel:card0
33: 0 0 0 0 0 0
0 81843 PCI-MSI 442368-edge snd_hda_intel:card1
NMI: 229 233 244 137 188 99
147 107 Non-maskable interrupts
LOC: 8147412 11215181 8654677 7200413 6723892 2734777
4631806 2358955 Local timer interrupts
SPU: 0 0 0 0 0 0
0 0 Spurious interrupts
PMI: 229 233 244 137 188 99
147 107 Performance monitoring interrupts
IWI: 2900 885 1195 309101 1956 2702
5074 3143 IRQ work interrupts
RTR: 0 0 0 0 0 0
0 0 APIC ICR read retries
RES: 2223602 2119245 1217195 695903 667320 97291
114748 73705 Rescheduling interrupts
CAL: 895506 552115 863706 521526 842682 695239
1098867 768611 Function call interrupts
TLB: 842180 507316 819848 475430 799540 649222
1055178 722638 TLB shootdowns
TRM: 0 0 0 0 0 0
0 0 Thermal event interrupts
THR: 0 0 0 0 0 0
0 0 Threshold APIC interrupts
DFR: 0 0 0 0 0 0
0 0 Deferred Error APIC interrupts
MCE: 0 0 0 0 0 0
0 0 Machine check exceptions
MCP: 86 87 87 87 87 87
87 87 Machine check polls
HYP: 0 0 0 0 0 0
0 0 Hypervisor callback interrupts
HRE: 0 0 0 0 0 0
0 0 Hyper-V reenlightenment interrupts
HVS: 0 0 0 0 0 0
0 0 Hyper-V stimer0 interrupts
ERR: 0
MIS: 0
PIN: 0 0 0 0 0 0
0 0 Posted-interrupt notification event
NPI: 0 0 0 0 0 0
0 0 Nested posted-interrupt event
PIW: 0 0 0 0 0 0
0 0 Posted-interrupt wakeup event
I#m not sure how to read this table..
Looking at /proc/asound/cards will also give you a list of your
currently recognised ALSA soundcards.
cat /proc/asound/cards
0 [HDMI ]: HDA-Intel - HDA Intel HDMI
HDA Intel HDMI at 0xf2610000 irq 32
1 [PCH ]: HDA-Intel - HDA Intel PCH
HDA Intel PCH at 0xf2614000 irq 33
2 [CODEC ]: USB-Audio - USB AUDIO CODEC
BurrBrown from Texas Instruments USB AUDIO CODEC
at usb-0000:00:14.0-1, full s
Set the IRQ of the soundcard that you want to use for your realtime
audio. And probably do it with:
export VARIABLENAME=irq_number
(if you're in bash/sh).
For the card 2 this would be
"export SOUND_CARD_IRQ=usb-0000:00:14.0-1" ?
Next, you might want to check your swap-space. I had problems with that.
My hard disk is a little slow and both swapping and recording/streaming
from the same disk might cause issues. If you're drive is new and fast
enough: don't worry.
It's a SSD. Not brand new, but reasonably fast I believe. I have a 2 GB
swap partition on the drive.
If you're using JACK, check the periods and buffersize. Perhaps it's a
little low.
It is.. :)
The quickscan script didn't find your filesystem types, it appears,
unless that was only the missing /tmp to which that "not found"
referred. Check your partition filesystems. You can look at /etc/fstab
or /etc/mtab. The first specifies how your partitions should be handled,
but that might contain the odd automatic discovery. mtab gives you the
status quo of everything currently mounted. Don't worry about all the
/proc, /sys and /dev items.
I think I am only missing /tmp, but does it matter? The rest of the file
system is ext4
In the end, you might want to install a kernel with realtime preemtion.
Since it's kubuntustudio, I exptect they have a preemt kernel in their
package repos.
I am using a lowlatency kernel in a normal kubuntu with kxstudio repos,
not ubuntustudio. Is that a problem?
thanks
m.
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