From: "Philippe Gramoullé" <philippe.gramoulle@mmania.com>
To: Andrew Morton <akpm@digeo.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: 2.5.67-mm4 & IRQ balancing
Date: Tue, 22 Apr 2003 12:06:30 +0200 [thread overview]
Message-ID: <20030422120630.4048a8b1.philippe.gramoulle@mmania.com> (raw)
In-Reply-To: <20030419133837.0118907b.akpm@digeo.com>
Hello,
On Sat, 19 Apr 2003 13:38:37 -0700
Andrew Morton <akpm@digeo.com> wrote:
| Philippe Gramoullé <philippe.gramoulle@mmania.com> wrote:
| >
| > [ SMP IRQ distribution ]
| >
| > Is this what you are looking for ? and are the values changes meaningful ?
|
| Looks good to me. But it didn't affect your machine at all, did it?
Well, no, i didn't really felt a clear change.
|
| This stuff only counts when the machine is doing a lot of work. The current
| IRQ balancer works well under high interrupt frequencies, but does quite the
| wrong thing if you're doing a lot of softirq work at low interrupt
| frequencies (gige routing with NAPI).
This box is used as a desktop box, so quite a lots of open applications, but no
real high load/IO except few kernel compiles and BK consistency checks.
Thanks,
Philippe
Booted with "noirqbalance" & started irqbalance:
$ cat /proc/interrupts
CPU0 CPU1
0: 73897 247288143 IO-APIC-edge timer
1: 38421 56 IO-APIC-edge i8042
2: 0 0 XT-PIC cascade
3: 177 0 IO-APIC-edge serial
8: 107607 0 IO-APIC-edge rtc
12: 3 0 IO-APIC-edge i8042, i8042, i8042, i8042
15: 32 118 IO-APIC-edge ide1
18: 12602 1159 IO-APIC-level EMU10K1
19: 454172 15987 IO-APIC-level uhci-hcd
20: 494005 0 IO-APIC-level eth0
22: 717483 38681 IO-APIC-level aic7xxx
23: 0 0 IO-APIC-level uhci-hcd
NMI: 0 0
LOC: 247366287 247364170
ERR: 0
MIS: 0
next prev parent reply other threads:[~2003-04-22 9:54 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-04-18 23:58 2.5.67-mm4 & IRQ balancing Philippe Gramoullé
2003-04-19 0:51 ` Andrew Morton
2003-04-19 13:39 ` Philippe Gramoullé
2003-04-19 20:38 ` Andrew Morton
2003-04-22 10:06 ` Philippe Gramoullé [this message]
2003-04-22 10:32 ` Arjan van de Ven
2003-04-23 19:41 ` Bill Davidsen
2003-04-23 20:13 ` Zwane Mwaikambo
2003-04-24 21:32 ` Bill Davidsen
2003-04-25 9:03 ` Arjan van de Ven
2003-04-23 20:15 ` Andrew Morton
2003-04-19 1:03 Nakajima, Jun
2003-04-19 12:21 Chuck Ebbert
2003-04-19 13:14 ` Philippe Gramoullé
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