Date: Tue, 17 Jul 2018 16:03:36 +0300 From: Lev Serebryakov <lev@FreeBSD.org> To: Eugene Grosbein <eugen@grosbein.net>, freebsd-net@freebsd.org Subject: Re: [REGRESSION] Fresh CURRENT consume much more CPU on network traffic (vlans + routing + ipfw with NAT) Message-ID: <eff19579-4c09-8530-1eaf-62185315be7d@FreeBSD.org> In-Reply-To: <5B4DA0B0.8020302@grosbein.net> References: <6d8b301b-8ee9-0e8b-80b5-6aced15ca843@FreeBSD.org> <5B4DA0B0.8020302@grosbein.net>
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From: Lev Serebryakov <lev@FreeBSD.org>
Reply-To: lev@FreeBSD.org
To: Eugene Grosbein <eugen@grosbein.net>, freebsd-net@freebsd.org
Message-ID: <eff19579-4c09-8530-1eaf-62185315be7d@FreeBSD.org>
Subject: Re: [REGRESSION] Fresh CURRENT consume much more CPU on network
traffic (vlans + routing + ipfw with NAT)
References: <6d8b301b-8ee9-0e8b-80b5-6aced15ca843@FreeBSD.org>
<5B4DA0B0.8020302@grosbein.net>
In-Reply-To: <5B4DA0B0.8020302@grosbein.net>
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On 17.07.2018 10:54, Eugene Grosbein 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 =E2=80=94 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 wi=
th
>> 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 traff=
ic).
>>
>> 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.
>=20
> I'm sure you will get it solved more quick if you perform bisection of =
revision
> even though it will take time.
I'll try latest version (seems here were a lot of commit to iflib after
my revision) and after that try yo bisect.
--=20
// Lev Serebryakov
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