Old 02-01-2019, 02:32 PM   #1
babag
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Default basic question about xruns

trying to sort out xruns. never had issues with windows and am now reading up on configs and such to minimize xruns. i don't do much recording. 95% of what i do is import, edit, and mix existing audio files. i'm running ubuntu studio with the kx repositories added and have pretty much just added all of the kx stuff so, although i didn't install kx as a distro, that's more or less what i'm running.

all that said, cadence is currently showing me something like 30 xruns when i open reaper. if i open a project and hit play, i get one xrun when it starts but none after. is this a scenario that i should worry about or not? my buffer is 512 and period is 2 or 3. not at the daw at the moment.

thanks for any opinions,
babag
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Old 02-09-2019, 06:23 AM   #2
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If it dont affect my workflow, I dont care.
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Old 02-09-2019, 10:24 AM   #3
JamesPeters
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A dropout when you start playback of a project shouldn't affect what you hear.

When loading a program, xruns can happen. Sometimes it happens when I load a plugin that has a large sample bank. During those times, your computer might be a bit overwhelmed but it's fine because you're just "setting up" to use the DAW. If xruns don't happen while you're working on the project, it's fine.

2-3 blocks of 512 samples is a bit high though. I'd expect you should be able to do better than that. I can run 3 blocks of 128 samples reliably with my Asus sound card.

Did you set your CPU governor to performance so that it doesn't throttle down to a lower speed? You may have to do that. (Look for cpufrequtils.)
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Old 02-10-2019, 12:33 PM   #4
babag
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thanks for the ideas, james, and sorry for the delay in responding. i do have the governor set to performance. in fact i have a pair of clickable scripts on my desktop so i can switch back and forth easily between 'performance' and 'powersave' modes. the 'performance' one also is set to run on boot. if i set the buffer to anything lower than 512, or the blocks lower than 3, i get xruns at a rate of about one per second. seems to me that i should be able to do better too but haven't figured it out yet.

thanks again,
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Old 02-10-2019, 03:14 PM   #5
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Yes something seems amiss. You can probably do better than that.

Post your relevant computer info and someone here can probably help guide you. The output of "inxi -Fxz" is a good place to start. If you run HardInfo (it's probably installed) you'll get all kinds of data but it's probably a bit much.
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Old 02-10-2019, 06:32 PM   #6
babag
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thanks, james. here's the output of "inxi -Fxz":
Code:
System:    Host: RackPC Kernel: 4.15.0-45-lowlatency x86_64 bits: 64 gcc: 7.3.0
           Desktop: KDE Plasma 5.12.7 (Qt 5.9.5) Distro: Ubuntu 18.04.2 LTS
Machine:   Device: desktop System: Gigabyte product: N/A serial: N/A
           Mobo: Gigabyte model: X79-UP4 v: x.x serial: N/A BIOS: American Megatrends v: F7 date: 03/19/2014
CPU:       6 core Intel Core i7-4930K (-MT-MCP-) arch: Ivy Bridge rev.4 cache: 12288 KB
           flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx) bmips: 40801
           clock speeds: max: 3900 MHz 1: 3259 MHz 2: 2639 MHz 3: 3301 MHz 4: 2911 MHz 5: 1961 MHz 6: 2006 MHz
           7: 3659 MHz 8: 3205 MHz 9: 1896 MHz 10: 2256 MHz 11: 3365 MHz 12: 1812 MHz
Graphics:  Card: NVIDIA GK104 [GeForce GTX 760] bus-ID: 02:00.0
           Display Server: x11 (X.Org 1.19.6 ) drivers: nvidia (unloaded: modesetting,fbdev,vesa,nouveau)
           Resolution: 1680x1050@59.95hz, 3840x2160@59.94hz, 1680x1050@59.95hz, 1680x1050@59.95hz
           OpenGL: renderer: GeForce GTX 760/PCIe/SSE2 version: 4.6.0 NVIDIA 390.77 Direct Render: Yes
Audio:     Card-1 NVIDIA GK104 HDMI Audio Controller driver: snd_hda_intel bus-ID: 02:00.1
           Card-2 Intel C600/X79 series High Definition Audio Controller driver: snd_hda_intel bus-ID: 00:1b.0
           Card-3 KORG nanoKONTROL2 MIDI Controller driver: USB Audio usb-ID: 001-012
           Sound: Advanced Linux Sound Architecture v: k4.15.0-45-lowlatency
Network:   Card: Intel 82579LM Gigabit Network Connection driver: e1000e v: 3.2.6-k port: f040 bus-ID: 00:19.0
           IF: eno1 state: up speed: 1000 Mbps duplex: full mac: <filter>
Drives:    HDD Total Size: 3072.6GB (5.3% used)
           ID-1: /dev/sda model: Samsung_SSD_850 size: 2048.4GB
           ID-2: /dev/sdb model: Samsung_SSD_850 size: 1024.2GB
Partition: ID-1: / size: 938G used: 153G (18%) fs: ext4 dev: /dev/sdb1
RAID:      No RAID devices: /proc/mdstat, md_mod kernel module present
Sensors:   System Temperatures: cpu: 36.0C mobo: N/A gpu: 0.0:56C
           Fan Speeds (in rpm): cpu: N/A
Info:      Processes: 287 Uptime: 3:21 Memory: 3119.2/32084.7MB Init: systemd runlevel: 5 Gcc sys: 7.3.0
           Client: Shell (bash 4.4.191) inxi: 2.3.56
not sure where to start with hardinfo but i did install it an run it.

thanks again,
babag

Last edited by babag; 02-10-2019 at 06:39 PM.
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