From: "Michael Chan" <mchan@broadcom.com>
To: "Harald Hannelius" <harald@iki.fi>
Cc: "Jiri Kosina" <jkosina@suse.cz>,
"David Miller" <davem@davemloft.net>,
linux-kernel@vger.kernel.org, netdev <netdev@vger.kernel.org>
Subject: Re: tg3 bad performance, lots of hardware interrupts
Date: Fri, 28 Mar 2008 11:06:51 -0800 [thread overview]
Message-ID: <1206731211.6866.13.camel@dell> (raw)
In-Reply-To: <alpine.DEB.1.00.0803281931060.5286@penti.org>
On Fri, 2008-03-28 at 19:37 +0200, Harald Hannelius wrote:
> # cat /proc/interrupts
> CPU0 CPU1
> 0: 111 1 IO-APIC-edge timer
> 1: 0 2 IO-APIC-edge i8042
> 2: 0 0 XT-PIC-XT cascade
> 5: 0 0 IO-APIC-fasteoi sata_nv
> 7: 856 51 IO-APIC-fasteoi ohci_hcd:usb2
> 10: 0 3 IO-APIC-fasteoi sata_nv, ehci_hcd:usb1
> 11: 4305 7 IO-APIC-fasteoi sata_nv
> 12: 0 4 IO-APIC-edge i8042
> 216: 4217 128932 PCI-MSI-edge eth2
> 217: 161107 685351 PCI-MSI-edge eth0
> NMI: 0 0 Non-maskable interrupts
> LOC: 2380762 2619917 Local timer interrupts
> RES: 3000 3269 Rescheduling interrupts
> CAL: 16 31 function call interrupts
> TLB: 64 111 TLB shootdowns
> TRM: 0 0 Thermal event interrupts
> SPU: 0 0 Spurious interrupts
> ERR: 1
> MIS: 0
>
> Well, shared or not, yes and no. I think that /proc/interrupts
> contains
> soft-interrupts. The problem child is interface eth2.
>
> As rapported by ifconfig the interface is on IRQ 5:
eth2 is using MSI. When using MSI, the IRQ reported by ifconfig is not
accurate. You said you have tried booting with nomsi, but have you
confirmed that by checking /proc/interrupts?
>
> # ifconfig eth2
> eth2 Link encap:Ethernet HWaddr 00:10:18:30:E6:D6
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:196898 errors:0 dropped:0 overruns:0 frame:0
> TX packets:19 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:1000
> RX bytes:69887991 (66.6 MiB) TX bytes:1216 (1.1 KiB)
> Interrupt:5
>
next prev parent reply other threads:[~2008-03-28 18:05 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-27 13:53 tg3 bad performance, lots of hardware interrupts Harald Hannelius
2008-03-27 21:49 ` David Miller
2008-03-28 1:01 ` Michael Chan
2008-03-28 13:04 ` Harald Hannelius
2008-03-28 17:49 ` Michael Chan
2008-03-28 17:12 ` Jiri Kosina
2008-03-28 17:37 ` Harald Hannelius
2008-03-28 19:06 ` Michael Chan [this message]
2008-03-28 18:09 ` Harald Hannelius
2008-04-02 8:55 ` Harald Hannelius
2008-03-28 17:31 ` Harald Hannelius
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