From: Alexander Clouter <alex@digriz.org.uk>
To: linux-kernel@vger.kernel.org
Subject: Re: timer interrupt handled by CPU0 only
Date: Wed, 13 May 2009 14:25:28 +0100 [thread overview]
Message-ID: <8buqd6-bab.ln1@woodchuck.wormnet.eu> (raw)
In-Reply-To: 200905131927152180665@gmail.com
qmh524 <qmh524@gmail.com> wrote:
>
> I have start irqbalance service. Why the timer interrupt only happend in CPU0
>
irqBALANCE...you could also ask why all your eth0 IRQ's are on CPU3 or
your ATA action is on CPU2.
It's my understanding you *steer* IRQ's to a CPU, you do not round-robin
them across all the CPU's.
Cheers
> $ sudo service irqbalance status
> irqbalance (pid 2390) is running...
> $ cat /proc/interrupts
> CPU0 CPU1 CPU2 CPU3
> 0: 21487296 0 0 0 IO-APIC-edge timer
> 1: 3 0 0 0 IO-APIC-edge i8042
> 8: 1 0 0 0 IO-APIC-edge rtc
> 9: 0 0 0 0 IO-APIC-level acpi
> 12: 4 0 0 0 IO-APIC-edge i8042
> 74: 18 0 0 0 IO-APIC-level
> uhci_hcd:usb1, uhci_hcd:usb3, ehci_hcd:usb4
> 82: 0 0 0 0 IO-APIC-level uhci_hcd:usb2
> 90: 1934 0 45886283 0 IO-APIC-level libata
> 98: 0 0 0 0 IO-APIC-level libata
> 106: 120 0 0 22824923 PCI-MSI eth0
> 169: 16933 0 9370507 0 IO-APIC-level ioc0
> NMI: 43241 26776 33934 29946
> LOC: 21487192 21487118 21487046 21486887
> ERR: 0
> MIS: 0
--
Alexander Clouter
.sigmonster says: A hammer sometimes misses its mark - a bouquet never.
prev parent reply other threads:[~2009-05-13 14:08 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-13 10:27 timer interrupt handled by CPU0 only qmh524
2009-05-13 13:25 ` Alexander Clouter [this message]
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=8buqd6-bab.ln1@woodchuck.wormnet.eu \
--to=alex@digriz.org.uk \
--cc=linux-kernel@vger.kernel.org \
/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