linuxaudio.org

On 10/25/2011 02:50 PM, Renato wrote:

quoted text
> Hi, your scripts have some nice tips for performance :)

>

>> > echo -n "0000:00:13.0" > /sys/bus/pci/drivers/ohci_hcd/unbind

> so what does this exactly do? how do I figure out a similar command for

> my system? but now that I think of it by usb controller with lowest IRQ

> shares it with the video card, so I guess I can't do anything in this

> case...?

> 

You can check ID's and their IRQ's of USB2 controllers with for instance:
#!/bin/sh

# USB2 controller ID and IRQ check
for a in $(ls /sys/bus/pci/drivers/ehci_hcd/ | grep 0000)

do

  echo -n ID $a has IRQ:

  cat /sys/bus/pci/drivers/ehci_hcd/$a/irq

done
If you want to figure out ID's for USB1 (OHCI) controllers replace

'ehci_hcd' with 'ohci_hcd' (of course you could also  create a more

sophisticated script).

With top or htop you can monitor the different tasklets if you're using

a realtime kernel or a >= 2.6.39 kernel with the threadirqs kernel option.
> you should consider putting those scripts on some wiki! they're cool

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> 

Thanks and will do.
> cheers,

quoted text
> renato

Best,
Jeremy

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