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 IRQ”, I enable it, but how do I actually change the IRQ from the OS? Answer … Read more
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 2354. I would like that interrupt were supported by all cores so I’ve tried to echo ff > /proc/irq/16/smp_affinity but it’s … Read more
I just put my FreeBSD 10.2-STABLE router in production running with Quagga 0.99.24.1, compiled throught Ports. After pass all traffic to this machine the load of S.O. been very hight and everything indicates that the problem is IRQ like shows below: 45 processes: 2 running, 42 sleeping, 1 waiting CPU 0: 0.4% user, 0.0% nice, … Read more
I have a centos vm and I am trying to distribute the softirqs across multiple cores. I have modified the smp_affinity_list from 3 to 0-3 but instead of balancing the interrupts, it just moved the interrupts to cpu 0. is there a way at all to balance the interrupts? I am using CentOS Linux release … Read more
We have a couple of t3.small instances. This is what the CPU utilization graph ends up looking like for both of them (running similar programs). Both seem to end up stabilizing at 20% CPU utilization. When I look at htop, this is what I see. Why is this happening? I must also point out that … Read more
Sometimes softIRQ time increases as you see in the server log. Is it normal? how can I find the cause? OS: Ubuntu 18.04 Postgre SQL 12 Thanks Answer AttributionSource : Link , Question Author : user2085899 , Answer Author : Community
I have a VPN server with Intel X710 and Xeon E5-2630 v4. Debian 10. Based on accel-ppp, pptp protocol. Single SFP interface, two vlans. Problem – interrupts are not evenly distributed across queues. In the first queue, more than 10 times more interrupts come than the rest. Because of this, after running set_irq_affinity -x all … Read more
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 ran top and was expecting to see some CPU or I/O wait but instead, the machine seems to be just waiting … Read more
In my linux server IO doesnot share in multiple CPU. as below output ata_piix intrupts share in only cpu0 [root@manage ~]# uname -a Linux manage 3.14.24-1smp #12 SMP Tue Mar 17 15:33:27 IST 2015 i686 i686 i386 GNU/Linux [root@manage ~]# cat /proc/interrupts CPU0 CPU1 CPU2 CPU3 CPU4 CPU5 CPU6 CPU7 0: 72 0 0 0 … Read more
On my CentOS 7 server, the load on each core is unequally distributed, as seen in the screenshot: some nginx worker seem to take way more load than other. irqbalanceis enabled, hyperthreading disabled. Any idea why ? Answer CPU 2 has at least a statsd task in addition to its nginx task. Migrating tasks to … Read more
