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From: Cliff Burdick <shaklee3@gmail.com>
To: Antonio Di Bacco <a.dibacco.ks@gmail.com>
Cc: users <users@dpdk.org>
Subject: Re: DPDK on isolated cores but I still see interrupts
Date: Tue, 1 Mar 2022 07:31:11 -0800
Message-ID: <CA+Gp1nY0r5drA9UX9mNoEDjW54Pt+JARV_gw7Ft-i_HqPSPiZQ@mail.gmail.com> (raw)
In-Reply-To: <CAO8pfFnr43DYs7ianmPKU_=Q5uRfC91ReXF-+zT+GmKrwJbn8Q@mail.gmail.com>

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One thing you can try is using the irqaffinity boot parameter to force
interrupts onto your non-isolated cores: For timer interrupts you can try
running in NO_HZ_FULL mode, but that may not work if you have other
userspace processes running on those cores. It might be worth confirming
that the interrupts are actually causing noticeable problems first before
trying to move the interrupts.

On Tue, Mar 1, 2022 at 6:52 AM Antonio Di Bacco <a.dibacco.ks@gmail.com>
wrote:

> I am trying to run a DPDK application on x86_64 Machine (Ubuntu 20.04) on
> isolated cores.
> I expected not to have interrupts on isolated cores but I still have a lot
> of CAL (*Function call interrupts*) interrupts and LOC interrupts (*Local
> timer interrupts*). Is there any setting in DPDK to stop those too?
>
> Regards.
>

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      parent reply	other threads:[~2022-03-01 15:31 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-03-01 14:52 Antonio Di Bacco
2022-03-01 15:16 ` Kinsella, Ray
2022-03-01 16:37   ` Stephen Hemminger
2022-03-01 15:31 ` Cliff Burdick [this message]

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