First Cup of Ubuntu
i have Ubuntu Studio 13.04 Beta 2 on a Toshiba Satellite P870. with Jack, I get xruns at anything less than 256 frames/period (Sample Rate: 48000, Periods/Buffer: 3). Its a decently-specified machine (i7, 16Gb RAM, 1Tb HD, etc), bought two weeks go. But I'm getting better performance from less well-specified, older machines, running Ubuntu Studio 13.04 Beta 1, and Ubuntu Studio 12.04. Any suggestions to improve performance/reduce latency appreciated.
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Why 3 periods? USB card?
What's your
Code:cat /proc/interrupts
First Cup of Ubuntu
Thanks, Jejeman.
I use a USB card too (Alesis iO2 or Samson G-Track) and the performance improves a little bit, but I still have xruns at 256/
Here's the output of cat /proc/interrupts, without the USB card:
Code:CPU0 CPU1 CPU2 CPU3 CPU4 CPU5 CPU6 CPU7 0: 71 0 0 0 0 0 0 0 IO-APIC-edge timer 1: 69 0 0 2 2 6 0 1 IO-APIC-edge i8042 8: 0 0 0 0 0 1 0 0 IO-APIC-edge rtc0 9: 0 1 0 0 0 0 0 0 IO-APIC-fasteoi acpi 12: 18677 269 210 507 168 561 158 541 IO-APIC-edge i8042 16: 157 14 5 43 16 14 24 4 IO-APIC-fasteoi ehci_hcd:usb1, nouveau 17: 77 21 20 468 9 28 3 11 IO-APIC-fasteoi rtlwifi 23: 16 3 0 0 0 1 10 3 IO-APIC-fasteoi ehci_hcd:usb2 41: 0 0 0 0 0 0 0 0 PCI-MSI-edge xhci_hcd 42: 11 5 1 12 0 1 1 2 PCI-MSI-edge rtsx_pci 43: 2523 596 259 2972 1529 307 359 855 PCI-MSI-edge ahci 44: 4 9 0 0 1 1 0 0 PCI-MSI-edge mei 45: 3 2 2 1 1 2 0 2 PCI-MSI-edge i915 46: 71 243 40 35 38 64 3 18 PCI-MSI-edge snd_hda_intel 47: 0 0 0 0 0 0 0 0 PCI-MSI-edge eth0 48: 0 0 0 0 0 0 0 0 PCI-MSI-edge eth0-TR-0 49: 0 0 0 0 0 0 0 0 PCI-MSI-edge eth0-TR-1 50: 0 0 0 0 0 0 0 0 PCI-MSI-edge eth0-TR-2 51: 0 0 0 0 0 0 0 0 PCI-MSI-edge eth0-TR-3 52: 0 0 0 0 0 0 0 0 PCI-MSI-edge eth0-R-4 53: 0 0 0 0 0 0 0 0 PCI-MSI-edge eth0-R-5 54: 0 0 0 0 0 0 0 0 PCI-MSI-edge eth0-R-6 55: 0 0 0 0 0 0 0 0 PCI-MSI-edge eth0-R-7 NMI: 3 1 4 1 5 1 5 1 Non-maskable interrupts LOC: 5453 2859 6365 3318 8468 2853 6639 2846 Local timer interrupts SPU: 0 0 0 0 0 0 0 0 Spurious interrupts PMI: 3 1 4 1 5 1 5 1 Performance monitoring interrupts IWI: 0 0 0 0 0 0 0 0 IRQ work interrupts RTR: 7 0 0 0 0 0 0 0 APIC ICR read retries RES: 3603 1050 379 1126 585 199 291 257 Rescheduling interrupts CAL: 691 637 677 700 681 669 659 701 Function call interrupts TLB: 160 240 163 305 149 237 123 236 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 MCE: 0 0 0 0 0 0 0 0 Machine check exceptions MCP: 2 2 2 2 2 2 2 2 Machine check polls ERR: 0 MIS: 0
Last edited by darwincommarts; 4 Weeks Ago at 04:02 PM.
Extra Foam Sugar Free Ubuntu
USB1 bus is sharing with VGA. Try the USB2 bus.
First Cup of Ubuntu
Thanks, Jejeman.
By USB2, I take it you mean that the sound card should use the USB 2 bus? If so, I checked with lsusb and it looks like the card is on USB 2.
CheersCode:Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 003 Device 003: ID 08bb:2904 Texas Instruments PCM2904 Audio Codec Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 003: ID 0930:021d Toshiba Corp. Bus 001 Device 004: ID 064e:d283 Suyin Corp. Bus 001 Device 005: ID 1164:1ee9 YUAN High-Tech Development Co., Ltd
First Cup of Ubuntu
It was the wifi. Takin a cue from you, I saw that rtlwifi shares with usb1 and usb2. i turned off wifi (and networking altogether), and no more xruns, even at 64 frames. thanks, Jejeman!
Extra Foam Sugar Free Ubuntu
Yes, on laptops it is always good to turn off wifi. It is the same for my laptop too.
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