Gentoo Archives: gentoo-user

From: Grant <emailgrant@×××××.com>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] Preventing a shared interrupt
Date: Sat, 22 May 2010 20:46:23
Message-Id: AANLkTinqrthc97m6pmTBEJgOghXZC1szSsaMBRlldMJC@mail.gmail.com
In Reply to: Re: [gentoo-user] Preventing a shared interrupt by Grant
1 >>> Does anyone know how to prevent my "nouveau" video card and "ath" wifi
2 >>> card from sharing interrupt 19?  I can't move the video card slot and
3 >>> I'd rather not move the wifi card slot if possible.
4 >>>
5 >>> BTW, does anyone see any other opportunity for interrupt optimization
6 >>> here?  I'm trying to optimize for video and especially audio, and I'm
7 >>> using a USB 1.0 sound card.
8 >>>
9 >>> # cat /proc/interrupts
10 >>>            CPU0
11 >>>   0:     473139   IO-APIC-edge      timer
12 >>>   1:          2   IO-APIC-edge      i8042
13 >>>   7:          1   IO-APIC-edge
14 >>>   8:        127   IO-APIC-edge      rtc0
15 >>>   9:          0   IO-APIC-fasteoi   acpi
16 >>>  12:          3   IO-APIC-edge      i8042
17 >>>  14:          0   IO-APIC-edge      ide0
18 >>>  19:     135597   IO-APIC-fasteoi   nouveau, ath
19 >>>  20:          2   IO-APIC-fasteoi   ehci_hcd:usb2
20 >>>  21:      13860   IO-APIC-fasteoi   ehci_hcd:usb1
21 >>>  22:     971970   IO-APIC-fasteoi   ohci_hcd:usb4
22 >>>  23:       3446   IO-APIC-fasteoi   ohci_hcd:usb3
23 >>>  28:      21524   PCI-MSI-edge      ahci
24 >>
25 >> FWIW a grep of the nouveau source doesnt bring up any hits on MSI, so it
26 >> looks like the driver doesnt support it yet. Likewise no hits for ath5k,
27 >> however ath9k does support it.
28 >
29 > Nice, thanks Adam.  Sounds like ath9k is the way out.
30 >
31 > - Grant
32
33 Ah nevermind, I guess ath9k is 802.11n only. Maybe they'll add MSI
34 support to ath5k.
35
36 - Grant