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From: Srivats P <pstavirs@gmail.com>
To: xdp-newbies@vger.kernel.org
Subject: IRQ assignment for queues
Date: Wed, 21 Apr 2021 12:27:01 +0530	[thread overview]
Message-ID: <CANzUK5-QPBHuGBVvrdcXvsjo2BVcQcfeQrWmZV5__WuhgnpiDQ@mail.gmail.com> (raw)

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:~$ sudo ethtool -L enp5s0f1 rx 1 tx 1 combined 0
combined unmodified, ignoring
srivatsp@EXA8:~$ ethtool -l enp5s0f1
Channel parameters for enp5s0f1:
Pre-set maximums:
RX:             4
TX:             4
Other:          0
Combined:       0
Current hardware settings:
RX:             1
TX:             1
Other:          0
Combined:       0

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?

Srivats

             reply	other threads:[~2021-04-21  6:57 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-21  6:57 Srivats P [this message]
2021-04-21 21:44 ` IRQ assignment for queues Zvi Effron
2021-04-22 15:31   ` Srivats P

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