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High network softirq requests for kernel 3.10 under a lot of traffic

We have been experimenting rolling out 3.10 series kernel that's provided by centos via the centosplus repo for v6. We have been noticing something interesting where under the same load the load for ...
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0answers
52 views

Cannot change CPU affinity on 3.13 kernel for eth0 interrupts [closed]

We are running 3.13 kernel (Ubuntu 14.04) on an IBM x3550 servers. I think I may have found a bug changing IRQ affinity for eth0 internet interface, that corresponds to IRQ 43 on this device. ...
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1answer
94 views

Setting default_smp_affinity on Linux to the correct value

I have 12 core boxes: egrep -c processor /proc/cpuinfo 12 cat /proc/irq/default_smp_affinity fff I would like to use all of the cores so my understanding is that the default_smp_affinity should be ...
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0answers
42 views

can't connect E1 digium te420 to freeswitch on CentOS

i'm experiencing an unknown problem for me, while i'm trying to connect digium te420 to freeswitch running on CentOS, digium card gives an alarm light while i'm connecting it. any ideas, can IRQ ...
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0answers
55 views

IRQ not handled by all CPUs

I have a problem about balancing irq. I took irq numbers from /etc/interrupts and assigned each irq to each of 24 CPUs as this tutorial says for i in {143..166};do cat /proc/irq/${i}/smp_affinity; ...
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0answers
130 views

Can't update smp_affinity

As part of the experiments that we are running to optimize the performance of the applications on our Linux box we are trying to assign all the network interrupts to a single cpu core. Unfortunately, ...
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2answers
79 views

eth0 lots of sudden interrupt

I as looking through munin-generated charts on an Ubuntu 12.10 server. I noticed that starting about 2 weeks ago(this server got a cold-shutdown at that moment) it started generating lots of rtc0 ...
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2answers
3k views

How to change SMP affinity of an IRQ on Ubuntu PV domU inside Xen XCP?

I'd like to change IRQ SMP affinity for reasons, outlined in this question: CPU0 is swamped with eth1 interrupts But I can't — I see Input/output error when I try to write to ...
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0answers
385 views

Disabling IRQ#16 when removing DVI cable [closed]

I have a computer running with a Blackmagic Decklink card and a usbscreen. The problem i'm having is somethimes a irq conflict occurs and the OS disables irq16 witch both the decklink card and the usb ...
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0answers
108 views

XCP Project Kronos syslog error: “irq … : nobody cared” on Dom0 host

One of our production clusters driven by XCP suddenly went uresponsive. After restart and some investigation we found such logs in dom0 machine syslog: Oct 26 20:32:03 hetzner-2-mrx kernel: ...
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1answer
555 views

IRQ Interrupts ESXi

We are trying to determine the pros and cons of allotting different number of CPUs to VMs (VMware). We would like to see how the VMware kernel is dividing up the total number of cores/threads and ...
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2answers
4k views

How to ban hardware interrupts with IRQBALANCE_BANNED_CPUS on Ubuntu?

I would like to ban interrupts from certain CPUs. I heard about the IRQBALANCE_BANNED_CPUS option. I see irqbalance is running in the background of my machine. Where do I go to edit and how do I ...
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0answers
232 views

Solaris 10 / NIC Marvell Yukon 88E8001 hungs with latest driver

I've installed latest yukon driver from marvell for Solaris 10 8/11. Got the driver, installed, updated /etc/driver_aliases and worked fine. After the system is running for a couple of days, it hungs ...
2
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0answers
778 views

Adaptec 5805 on Centos 6 IRQ 16 error

I'm having a problem with Adaptec 5805 raid card http://www.adaptec.com/en-us/support/raid/sas_raid/sas-5805/ (with two SAS discs in raid) and Gigabyte motherboard GA-H67A-D3H-B3 ...
0
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1answer
284 views

Irregular interrupts balance in AMD Opetron Quad-Core

I had a problem with CPU7 overload. I found that it was caused by the eth0 interrupts, as you can see on below cat /proc/interrupts. I'm using 2.6.35.2 kernel and Quad-Core AMD Opteron(tm) Processor ...
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1answer
154 views

100% Hardware IRQ while PHP just seems to hang for a second

I'm running the FLOW3 Quickstart on a Fedora machine (virtualized on Windows, if that helps). Each and every single request takes about 1.2 seconds to run the most simple example of this framework. I ...
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1answer
2k views

“No irq handler for vector (irq -1)” after hibernation

Resuming from hibernation messages like these are printed to all terminals: Message from syslogd@Ildjarn at Apr 8 08:11:14 ... kernel:[24089.310964] do_IRQ: 0.82 No irq handler for vector (irq -1) ...
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2answers
2k views

ethernet smp_affinity vs /proc/interrupts vs /sys/class/net/ethX/device

My goal is to configure our CentOS ("free" RHEL) 5.x servers for custom low-latency network programs. I would like to experiment with binding ethernet NIC interrupt handling to the same CPU on which ...
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3answers
770 views

VMWare ESXi and IRQ balancing

VMWare ESXi 4.1 Guest: Linux kernel 2.6.32 64bit (tried older as well) In multi-CPU virtual machine all interrupts (eth0,ata_piix) are stuck to the single CPU. When running on the pure hardware, ...
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1answer
2k views

Apparent IRQ conflict driving me nuts under CentOS

The Environment I have a small, dual-core Intel Atom-based server running CentOS 5.5 x64 with a slightly customized Xen kernel. It also has one on-board 10/100 NIC with an additional 3-port 10/100 ...
3
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3answers
803 views

SATA drive problems with two SIL RAID cards

I've just put a second SiI 3114 SATARaid card in my home server so that I could add another pair of SATA drives and increase my storage space. Annoyingly, it doesn't seem to work: [ 32.816030] ...
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1answer
421 views

What does the irqstat graph in munin represent?

What does it mean for this munin graph of weekly irqstat to suddenly go crazy like it does -- is it bad? What are local timer interrupts?
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1answer
10k views

What's the cause of high LOC interrupts?

I'm seeing huge spikes in LOC interrupts - around 4 million per second, what exactly is the LOC interrupt, what would cause these spikes, and what can I do about it? Here's a munin graph illustrating ...
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3answers
3k views

cause for high Interrupts and context switches

Hey guys, I have a quad core and I have spotted on munin (monitoring interrupts and context switches), that my interrupts and context switches spiked to 25k a second while the average was 250 for some ...
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2answers
997 views

Handle IRQ in Debian

I'm running Debian and I'm running into an IRQ problem, two cards that generate a lot of IRQ interrupts are sharing the same IRQ (16). I found on the HP Bios an option that states "allow OS to trip ...
2
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3answers
6k views

Logging Hardware Interrupts (IRQs) which are using 10-25% CPU

I have a server using 10-25% of the CPU time on Hardware Interrupts according to Process Explorer. How would I go about logging/diagnosing the cause of all these IRQ calls? The machine is virtual, ...