2
votes
0answers
73 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, ...
2
votes
0answers
280 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 ...
7
votes
2answers
3k 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 ...
0
votes
1answer
260 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 ...
2
votes
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 ...
8
votes
1answer
9k 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 ...
1
vote
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 ...
0
votes
2answers
942 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 ...