Re: [LAU] Something interesting about kernel 3.6.5-rt14

On Sat, 3 Nov 2012 08:43:11 -0700
"Len Ovens" <len@email-addr-hidden> wrote:

> Playing with PCI_latency made things worse for me, no gain and an
> unstable machine. This will have no effect whatever on PCIe cards.

Okay, so I only will unbind 2 USB ports. FWIW some things need to be
done in a different way, than it's described by "linuxmusicians" and
stopping networking does cause trouble. I couldn't find out how to
unbind the 2 USB ports.

spinymouse@email-addr-hidden:/mnt/music/quantal/01song$ sudo bash tuning
[sudo] password for spinymouse:
bluetooth stop/waiting
network-manager stop/waiting
cups stop/waiting
tuning: line 28: echo: write error: No such device
tuning: line 29: echo: write error: No such device
##############################
$ /etc/init.d/rtirq status

  PID CLS RTPRIO NI PRI %CPU STAT COMMAND
   62 FF 90 - 130 0.0 S irq/8-rtc0
  896 FF 85 - 125 0.0 S irq/18-snd_hdsp
   54 FF 80 - 120 0.0 S irq/19-ehci_hcd
   55 FF 80 - 120 0.0 S irq/16-ohci_hcd
   56 FF 79 - 119 0.3 S irq/17-ohci_hcd
   58 FF 78 - 118 0.0 S irq/18-ohci_hcd
   59 FF 78 - 118 0.0 S irq/17-ohci_hcd
   60 FF 77 - 117 0.0 S irq/18-ohci_hcd
   61 FF 75 - 115 0.0 S irq/1-i8042
   24 FF 50 - 90 0.0 S irq/9-acpi
   46 FF 50 - 90 0.1 S irq/22-ahci
  257 FF 50 - 90 0.0 S irq/14-pata_ati
  258 FF 50 - 90 0.0 S irq/15-pata_ati
  695 FF 50 - 90 0.0 S irq/7-parport0
  818 FF 50 - 90 0.0 S irq/43-radeon
    3 FF 1 - 41 0.1 S ksoftirqd/0
   15 FF 1 - 41 0.1 S ksoftirqd/1

$ cat /proc/interrupts | grep 18:
 18: 0 2 IO-APIC-fasteoi ohci_hcd:usb4,
                             ohci_hcd:usb6, snd_hdspm
Sat Nov 3 21:32:46 CET 2012 - 3.6.5-rt14 - Ubuntu 12.10 \n \l

spinymouse@email-addr-hidden:/mnt/music/quantal/01song$ cat -n tuning
     1 #!/bin/bash
     2
     3 # sudo bash tuning - Ubuntu Studio Quantal
     4 # 2012/Nov/03
     5
     6 ### http://www.mythtv.org/wiki/PCI_Latency
     7 ###
     http://wiki.linuxmusicians.com/doku.php?id=system_configuration#pci_bus_latency
     8
     9 ### Bluetooth
    10 service bluetooth stop
    11
    12 ### Network
    13 service network-manager stop
    14 #service networking stop # does cause serious issues
    15 modprobe -r r8169 # Ethernet NIC driver
    16
    17 ### TerraTec EWX 24/96
    18 modprobe -r snd_ice1712
    19
    20 ### Others
    21 modprobe -r firewire-ohci
    22 modprobe -r firewire_core
    23 service cups stop
    24 modprobe -r ppdev # parallel port
    25 modprobe -r lp # printer
    26
    27 ### Unbinding devices
    28 echo -n "0000:00/0000:00:13.2"
> /sys/bus/pci/drivers/ohci_hcd/unbind
    29 echo -n "0000:00/0000:00:13.4"
> /sys/bus/pci/drivers/ohci_hcd/unbind
    30
    31 ### Log file
    32 l="log/tuning.log"
    33 #echo "$ lspci -v " > $l
    34 #lspci -v >> $l
    35 #echo >> $l
    36 echo "$ /etc/init.d/rtirq status " > $l
    37 /etc/init.d/rtirq status >> $l
    38 echo >> $l
    39 echo "$ cat /proc/interrupts | grep 18:" >> $l
    40 cat /proc/interrupts | grep 18: >> $l
    41 echo -n $(date)" - "$(uname -r)" - " >> $l
    42 cat /etc/issue >> $l
    43 echo "##############################" ; cat $l
    44
    45 exit 0
    46

Regards,
Ralf

PS:
Btw.
sudo echo foo > /sys/...
doesn't work, it has to be
echo foo | sudo tee /sys/...
sudo bash -c "echo foo > /sys/..."
;)
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Received on Sun Nov 4 00:15:02 2012