tag:blogger.com,1999:blog-1610041778732887994.post761760844237871988..comments2023-07-21T09:16:48.778-07:00Comments on Levent Serinol's Blog: IRQ affinity in LinuxAnonymoushttp://www.blogger.com/profile/06161379979453710759noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-1610041778732887994.post-84394832826670751252013-02-20T03:27:32.354-08:002013-02-20T03:27:32.354-08:00Hi, thanks it works fine.
Under Ubuntu, sudoers d...Hi, thanks it works fine. <br />Under Ubuntu, sudoers don't have the right to perform it. It require to be logged as root.<br /><br />CheersAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-1610041778732887994.post-28846175733282205602012-09-14T08:09:39.866-07:002012-09-14T08:09:39.866-07:00How would the calculation if there were 8 cpus and...How would the calculation if there were 8 cpus and wanted to manipulate the CPU 6?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-1610041778732887994.post-4602948425721052912012-06-13T16:33:37.540-07:002012-06-13T16:33:37.540-07:00I know this was a while ago but..
Is it the case t...I know this was a while ago but..<br />Is it the case that whatever core handles the interrupt will process the packet wether it be traversing a bridge, IP routing, IP reassembly (if required) or will nor core process the interrupt and then share subsequent processing across all cores?<br /><br />Thanks,<br />Leighleighporterhttps://www.blogger.com/profile/05302818815635825482noreply@blogger.comtag:blogger.com,1999:blog-1610041778732887994.post-48396577384166138562010-09-09T06:04:07.752-07:002010-09-09T06:04:07.752-07:00You got overrun probably kernel cannot handle inco...You got overrun probably kernel cannot handle incoming hardware interrupts due to high number network packets. <br /><br />Handling network irq through many cpus is not a good idea, it probably give you latency when packet assembling is required. <br /><br />I think you have two choices. First one is channel bonding.Second one is playing with InterruptThrottleRate. if you increase it, you'll get high cpu usage and lower latency. it's a trade off. lowering it, will give you less cpu usage but high latency on packets. Also, you need to increase RX queue limit. If we're talking about high incoming network traffic.Anonymoushttps://www.blogger.com/profile/06161379979453710759noreply@blogger.comtag:blogger.com,1999:blog-1610041778732887994.post-35482206591951011302010-09-08T19:15:07.165-07:002010-09-08T19:15:07.165-07:00I experienced overruns on my network interface whe...I experienced overruns on my network interface when irqs are not balanced among all CPUs. But when they are all spread out there is no overrun. <br /><br />For some reasons new Dell servers and linux kernels don't automatically balance out the irq anymore. Do you have any ideas?Oat's Personal Bloghttps://www.blogger.com/profile/11456569097835020561noreply@blogger.com