On 03/08/2010 11:31 AM, Atte André Jensen wrote: > Hi > > Normally my ubuntu 9.10 with ubuntu stock kernel performs just fine for > me. I'm running through an edirol FA66 firewire sound card with 8ms latency. > > However now I'm starting to prepare for some live performances, and now > things could (or should oar even *must*) perform better. > > As some might know, my main audio application is renoise, but since it's > closed source, maybe we should focus more on how the problem manifests > itself in other ways? > > Good example: I get two xrun about 2 seconds apart) when I open a > gnome-terminal. This is with no jackclients running, just qjackctl on > 8ms latency through the firewire card. > > This is normally no problem since if I work in renoise things really > stable (no xruns) and responsive. But for live usage I'm gonna throw > other applications (PD, chuck, sooperlooper) into the equation, so... > > About my setup: > Laptop, 2GHz dual core, 2G ram. > > atte@vestbjerg:~$ uname -r > 2.6.31-20-generic > > I have this in my limits.conf: > @audio - rtprio 99 > @audio - memlock unlimited > > I notice a drastic improvement if I set the frequency govenor to > "performance" through the gnome panel applet, but I just discovered > (through "grep MHz /proc/cpuinfo" that this only seems to set one core > to 2Ghz, the other seems to be running "on demand". Shouldn't they both > be running at full steam, and how do I make them? > > But my first thought (as reflected my the subject) was to raise the > priority for the firewire card. However I seem to need help figuring out > how to do that. For instance the last time I did this I used 'pidof "IRQ > 8', which doesn't work here (neither on ubuntu repo rt-kernel), pidof > auto completes to this list: > > Display all 124 possibilities? (y or n) > 0 indicator-users-service > 1 init > acpid iwl3945 > ata_aux jackd > atd kacpid > avahi-daemon kacpi_hotplug > bash kacpi_notify > bluetooth khelper > bluetooth-applet khpsbpkt > bonobo-activation-server khubd > compiz.real khungtaskd > console-kit-daemon kjournald > cpufreq-applet kmmcd > cpuset kmpath_handlerd > cron knodemgrd_0 > cupsd kpsmoused > dbus-daemon krfcommd > dbus-launch kseriod > dd ksnapd > devkit-disks-daemon kstriped > devkit-power-daemon ksuspend_usbd > dhclient kswapd0 > ecryptfs-kthrea kthreadd > evolution-alarm-notify mgr > evolution-data-server-2.28 modem-manager > evolution-exchange-storage mono > firefox multiload-applet-2 > gconfd-2 nautilus > gdm-binary netns > gdm-session-worker NetworkManager > gdm-simple-slave nm-applet > gdu-notification-daemon notify-osd > getty pdflush > gnome-keyring-daemon phy0 > gnome-panel polkitd > gnome-power-manager polkit-gnome-authentication-agent-1 > gnome-pty-helper ps > gnome-screensaver pulseaudio > gnome-session python > gnome-settings-daemon qjackctl.bin > gnome-terminal renoise > gnome-volume-control-applet rsyslogd > gtk-window-decorator scsi_eh_0 > gvfsd scsi_eh_1 > gvfsd-burn scsi_eh_2 > gvfsd-metadata scsi_eh_3 > gvfsd-trash scsi_eh_4 > gvfs-fuse-daemon scsi_eh_5 > gvfs-gdu-volume-monitor seahorse-daemon > gvfs-gphoto2-volume-monitor sed > hald sh > > My interrupts: > atte@vestbjerg:~$ cat /proc/interrupts > CPU0 CPU1 > 0: 332326 331479 IO-APIC-edge timer > 1: 784 769 IO-APIC-edge i8042 > 8: 1 0 IO-APIC-edge rtc0 > 9: 1064 1081 IO-APIC-fasteoi acpi > 12: 75 78 IO-APIC-edge i8042 > 14: 3590 3577 IO-APIC-edge ata_piix > 15: 0 0 IO-APIC-edge ata_piix > 16: 118009 118898 IO-APIC-fasteoi uhci_hcd:usb3, ohci1394 > 17: 0 0 IO-APIC-fasteoi mmc0 > 18: 7196 7100 IO-APIC-fasteoi ehci_hcd:usb1, uhci_hcd:usb7 > 19: 0 0 IO-APIC-fasteoi uhci_hcd:usb6 > 21: 0 0 IO-APIC-fasteoi uhci_hcd:usb4 > 22: 288 318 IO-APIC-fasteoi HDA Intel > 23: 10 10 IO-APIC-fasteoi ehci_hcd:usb2, uhci_hcd:usb5 > 28: 6897 6865 PCI-MSI-edge ahci > 29: 957 883 PCI-MSI-edge eth0 > 30: 6253 6394 PCI-MSI-edge i915 > 31: 0 0 PCI-MSI-edge iwl3945 > NMI: 0 0 Non-maskable interrupts > LOC: 326940 325631 Local timer interrupts > SPU: 0 0 Spurious interrupts > CNT: 0 0 Performance counter interrupts > PND: 0 0 Performance pending work > RES: 265237 265761 Rescheduling interrupts > CAL: 60 111 Function call interrupts > TLB: 422 295 TLB shootdowns > TRM: 0 0 Thermal event interrupts > THR: 0 0 Threshold APIC interrupts > MCE: 0 0 Machine check exceptions > MCP: 2 3 Machine check polls > ERR: 0 > MIS: 0 > > About my hardware: > atte@vestbjerg:~$ lspci > 00:00.0 Host bridge: Intel Corporation Mobile PM965/GM965/GL960 Memory > Controller Hub (rev 03) > 00:02.0 VGA compatible controller: Intel Corporation Mobile GM965/GL960 > Integrated Graphics Controller (rev 03) > 00:02.1 Display controller: Intel Corporation Mobile GM965/GL960 > Integrated Graphics Controller (rev 03) > 00:1a.0 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI > Controller #4 (rev 03) > 00:1a.1 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI > Controller #5 (rev 03) > 00:1a.7 USB Controller: Intel Corporation 82801H (ICH8 Family) USB2 EHCI > Controller #2 (rev 03) > 00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio > Controller (rev 03) > 00:1c.0 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express > Port 1 (rev 03) > 00:1c.1 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express > Port 2 (rev 03) > 00:1c.2 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express > Port 3 (rev 03) > 00:1c.3 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express > Port 4 (rev 03) > 00:1d.0 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI > Controller #1 (rev 03) > 00:1d.1 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI > Controller #2 (rev 03) > 00:1d.2 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI > Controller #3 (rev 03) > 00:1d.7 USB Controller: Intel Corporation 82801H (ICH8 Family) USB2 EHCI > Controller #1 (rev 03) > 00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev f3) > 00:1f.0 ISA bridge: Intel Corporation 82801HEM (ICH8M) LPC Interface > Controller (rev 03) > 00:1f.1 IDE interface: Intel Corporation 82801HBM/HEM (ICH8M/ICH8M-E) > IDE Controller (rev 03) > 00:1f.2 SATA controller: Intel Corporation 82801HBM/HEM (ICH8M/ICH8M-E) > SATA AHCI Controller (rev 03) > 00:1f.3 SMBus: Intel Corporation 82801H (ICH8 Family) SMBus Controller > (rev 03) > 03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. > RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 01) > 04:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG > [Golan] Network Connection (rev 02) > 0a:01.0 FireWire (IEEE 1394): Ricoh Co Ltd R5C832 IEEE 1394 Controller > (rev 05) > 0a:01.1 SD Host controller: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro > Host Adapter (rev 22) > 0a:01.2 System peripheral: Ricoh Co Ltd R5C843 MMC Host Controller (rev 12) > 0a:01.3 System peripheral: Ricoh Co Ltd R5C592 Memory Stick Bus Host > Adapter (rev 12) > 0a:01.4 System peripheral: Ricoh Co Ltd xD-Picture Card Controller (rev ff) > > So basically I'm a bit lost here. Any help or input would be greatly > appreciated! > Hello Atte, Best is to disable frequency scaling altogether. Or add more CPU frequency monitors to your panel, one for each core. And you could take a look at rtirq: http://ubuntuforums.org/showthread.php?t=1328175 And the FFADO wiki: http://subversion.ffado.org/wiki/IrqPriorities This improved performance on all my machines drastically, especially with my Focusrite Saffire Pro. Best, Jeremy _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
