Date: Tue, 17 Jul 2018 14:54:24 +0700 From: Eugene Grosbein <eugen@grosbein.net> To: lev@FreeBSD.org, freebsd-net@freebsd.org Subject: Re: [REGRESSION] Fresh CURRENT consume much more CPU on network traffic (vlans + routing + ipfw with NAT) Message-ID: <5B4DA0B0.8020302@grosbein.net> In-Reply-To: <6d8b301b-8ee9-0e8b-80b5-6aced15ca843@FreeBSD.org> References: <6d8b301b-8ee9-0e8b-80b5-6aced15ca843@FreeBSD.org>
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On 13.07.2018 18:10, Lev Serebryakov wrote:
>
> I have "SOHO" router on Atom D2500 with FreeBSD CURRENT. It runs
> CURRENT for very long time (from 11-CURRENT times), and recently it
> start to consume much more CPU on same traffic — to the point when it
> becomes unresponsive in shell (via ssh, not local console).
>
> I have rather complex ipfw ruleset, but this ruleset is the same for
> many years.
>
> Revisions before r333989 worked normally, I never seen any problem with
> shell, no matter how much traffic is processed
>
> Revision r334649 with same configuration, same firewall ruleset, etc.,
> becomes completely unresponsive under network load (pure transit traffic).
>
> when system is unresponsive I see this in `top -SH`
>
> 100083 root -76 - 0K 272K - 1 291.8H 95.31% kernel{if_io_tqg_1}
> 100082 root -76 - 0K 272K - 0 297.7H 95.20% kernel{if_io_tqg_0}
>
> And it is new to me.
I'm sure you will get it solved more quick if you perform bisection of revision
even though it will take time.
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