On Thu, Apr 22, 2021 at 3:14 AM Zvi Effron <zeffron@xxxxxxxxxxxxx> wrote: > > On Tue, Apr 20, 2021 at 11:57 PM Srivats P <pstavirs@xxxxxxxxx> wrote: > > > > Hi, > > > > Not a XDP question, but more generic about IRQ assignment for queues. > > > > For a NIC which has separate RX and TX queues (no COMBINED queues), I > > see in /proc/interrupts that only 1 IRQ is assigned. > > > > ... > > > > srivatsp@EXA8:~$ cat /proc/interrupts | grep enp5s0f1 > > 73: 0 2 0 0 ITS-MSI 2623488 > > Edge enp5s0f1-rxtx-0 > > 89: 0 0 0 0 ITS-MSI 2623504 > > Edge enp5s0f1-rbdr-0 > > 92: 0 0 0 0 ITS-MSI 2623507 > > Edge enp5s0f1-qset-err-0 > > > > Is the IRQ for the RX queue or TX queue or both? Does Tx need an IRQ? > > I see the IRQ name has "rxtx" in it. From my experience, that's the > same type of designation used for combined queues, and indicates that > the IRQ is for both RX and TX. I guessed as much (based on i40e combined TxRx queues experience), but wanted to confirm. > I'm not sure which driver you're using, This output and query was for the Cavium ThunderX nic_vf driver specifically. > though, and my experience is mostly with i40e and ena drivers, so it > could be incorrect when applied to your case. > > --Zvi
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