From: Frederik Himpe <fhimpe@telenet.be>
To: linux-kernel@vger.kernel.org
Cc: linux-usb-devel@lists.sourceforge.net
Subject: 2.6.24-rc3-git3: usb hardware interrupts using 25% of CPU time
Date: Wed, 28 Nov 2007 22:33:18 +0000 (UTC) [thread overview]
Message-ID: <pan.2007.11.28.22.33.18@telenet.be> (raw)
I installed Linux 2.6.24-rc3-git3 on a PPC based Apple Powerbook G4
system. Now with top I see that over 20% of CPU time is used by hardware
interrupts. Looking at /proc/interrupts, the number in the row
ohci_hcd:usb1 is rising very quickly:
$ cat /proc/interrupts
CPU0
21: 1 MPIC 1 Edge i2sbus: i2s-a (tx)
24: 11008 MPIC 1 Level ide1
25: 33608 MPIC 1 Level VIA-PMU
26: 56 MPIC 1 Level keywest i2c
27: 1 MPIC 1 Edge i2sbus: i2s-a (rx)
29: 281578 MPIC 1 Level ohci_hcd:usb1
30: 0 MPIC 1 Level i2sbus: i2s-a (control)
31: 0 MPIC 1 Level i2sbus: i2s-b (control)
33: 1 MPIC 1 Edge i2sbus: i2s-b (tx)
34: 1 MPIC 1 Edge i2sbus: i2s-b (rx)
39: 41611 MPIC 1 Level ide0
40: 2 MPIC 1 Level ohci1394
41: 0 MPIC 1 Level eth0
42: 0 MPIC 1 Level keywest i2c
47: 2826 MPIC 1 Level GPIO1 ADB
48: 58633 MPIC 1 Level radeon@pci:0000:00:10.0
52: 18961 MPIC 1 Level b43
53: 1 MPIC 1 Level yenta
61: 1 MPIC 1 Edge headphone-detect
63: 0 MPIC 1 Level ohci_hcd:usb2, ohci_hcd:usb3,
ehci_hcd:usb4
BAD: 187917
$ lspci -nn
0000:00:0b.0 Host bridge [0600]: Apple Computer Inc. UniNorth 2 AGP
[106b:0034]
0000:00:10.0 VGA compatible controller [0300]: ATI Technologies Inc RV350
[Mobility Radeon 9600 M10] [1002:4e50]
0001:10:0b.0 Host bridge [0600]: Apple Computer Inc. UniNorth 2 PCI
[106b:0035]
0001:10:12.0 Network controller [0280]: Broadcom Corporation BCM4306
802.11b/g Wireless LAN Controller [14e4:4320] (rev 03)
0001:10:13.0 CardBus bridge [0607]: Texas Instruments PCI1510 PC card
Cardbus Controller [104c:ac56]
0001:10:17.0 Unknown class [ff00]: Apple Computer Inc. KeyLargo/Intrepid
Mac I/O [106b:003e]
0001:10:19.0 USB Controller [0c03]: Apple Computer Inc. KeyLargo/Intrepid
USB [106b:003f]
0001:10:1a.0 USB Controller [0c03]: Apple Computer Inc. KeyLargo/Intrepid
USB [106b:003f]
0001:10:1b.0 USB Controller [0c03]: NEC Corporation USB [1033:0035] (rev
43)
0001:10:1b.1 USB Controller [0c03]: NEC Corporation USB [1033:0035] (rev
43)
0001:10:1b.2 USB Controller [0c03]: NEC Corporation USB 2.0 [1033:00e0]
(rev 04)
0002:24:0b.0 Host bridge [0600]: Apple Computer Inc. UniNorth 2 Internal
PCI [106b:0036]
0002:24:0d.0 Unknown class [ff00]: Apple Computer Inc. UniNorth/Intrepid
ATA/100 [106b:003b]
0002:24:0e.0 FireWire (IEEE 1394) [0c00]: Apple Computer Inc. UniNorth 2
FireWire [106b:0031] (rev 81)
0002:24:0f.0 Ethernet controller [0200]: Apple Computer Inc. UniNorth 2
GMAC (Sun GEM) [106b:0032] (rev 80)
Full dmesg, .config and lsmod output can be found on
http://artipc10.vub.ac.be/linux-2.6.24-rc3-git3/
--
Frederik Himpe
next reply other threads:[~2007-11-28 22:34 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-28 22:33 Frederik Himpe [this message]
2007-11-28 22:40 ` Tony Breeds
2007-11-28 23:02 ` Rafael J. Wysocki
2007-11-28 22:50 ` Frederik Himpe
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=pan.2007.11.28.22.33.18@telenet.be \
--to=fhimpe@telenet.be \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-usb-devel@lists.sourceforge.net \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®