Date: Thu, 19 Jul 2018 16:07:25 +0300 From: Lev Serebryakov <lev@FreeBSD.org> To: Kevin Bowling <kevin.bowling@kev009.com> Cc: Eugene Grosbein <eugen@grosbein.net>, FreeBSD Net <freebsd-net@freebsd.org> Subject: Re: [REGRESSION] Fresh CURRENT consume much more CPU on network traffic (vlans + routing + ipfw with NAT) Message-ID: <5ae80bd6-9b97-bf22-9ad0-43ad1eb57711@FreeBSD.org> In-Reply-To: <CAK7dMtCYO2ae7phBeHAk7w7TeB1_LxZVX6SeXCF2jxk9_du-0w@mail.gmail.com> References: <6d8b301b-8ee9-0e8b-80b5-6aced15ca843@FreeBSD.org> <5B4DA0B0.8020302@grosbein.net> <eff19579-4c09-8530-1eaf-62185315be7d@FreeBSD.org> <CAK7dMtCYO2ae7phBeHAk7w7TeB1_LxZVX6SeXCF2jxk9_du-0w@mail.gmail.com>
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This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --CGz8C8fAJAJAhiX9CH4GqgjgUIHa3PhG9 Content-Type: multipart/mixed; boundary="kLx9HHS5HBM0USRTX9favcf3RbLD49Vqn"; protected-headers="v1" From: Lev Serebryakov <lev@FreeBSD.org> Reply-To: lev@FreeBSD.org To: Kevin Bowling <kevin.bowling@kev009.com> Cc: Eugene Grosbein <eugen@grosbein.net>, FreeBSD Net <freebsd-net@freebsd.org> Message-ID: <5ae80bd6-9b97-bf22-9ad0-43ad1eb57711@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> <eff19579-4c09-8530-1eaf-62185315be7d@FreeBSD.org> <CAK7dMtCYO2ae7phBeHAk7w7TeB1_LxZVX6SeXCF2jxk9_du-0w@mail.gmail.com> In-Reply-To: <CAK7dMtCYO2ae7phBeHAk7w7TeB1_LxZVX6SeXCF2jxk9_du-0w@mail.gmail.com> --kLx9HHS5HBM0USRTX9favcf3RbLD49Vqn Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 19.07.2018 8:39, Kevin Bowling wrote: > This sounds like a known quirk of the Atom CPU architecture and iflib > -- can you try this patch https://reviews.freebsd.org/D16302 it should > help specifically on your hardware. Looks like, this patch on r336474 with default sysctl setting: dev.em.1.iflib.tx_abdicate: 0 dev.em.0.iflib.tx_abdicate: 0 makes worse, not better (100% CPU load by `kernel{if_io_tqg_X}' even under very light traffic load). --=20 // Lev Serebryakov --kLx9HHS5HBM0USRTX9favcf3RbLD49Vqn-- --CGz8C8fAJAJAhiX9CH4GqgjgUIHa3PhG9 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQKTBAEBCgB9FiEE+W0coLX0MYtnSzMK6rA8WL/cR48FAltQjQ1fFIAAAAAALgAo aXNzdWVyLWZwckBub3RhdGlvbnMub3BlbnBncC5maWZ0aGhvcnNlbWFuLm5ldEY5 NkQxQ0EwQjVGNDMxOEI2NzRCMzMwQUVBQjAzQzU4QkZEQzQ3OEYACgkQ6rA8WL/c R4/48w//b/3IZhriAP7Nj8sMFUFPo+2dOmg8ocOJyRcW+V2+76APjLUCuYoMqJk4 6zvLa/t896eMejcNdQojPhTiQGuNrQR9ttMJknbpMTE8n/BfSuv035mAXJdBxdaU b/DNNJw6DbtaJeG702/e7tzR3feWwazhfz8wEJMbaP87s1/lGe6W192sQR+vN/Jg k+41hStJQgHX0KTnuMIx05BdBGRaBZj/4p6L/Xq4znX8I8lzcI+DryX6riZUb5wE 9PaJ2zKvzcajWNCOUMw5RKwJwWyuEFh/M+aRkUtedbxl7o2ELLubw1A4ivyyNQVx TlZim7VoNpSDW+cKJrnD9FN6jIKqM/auZG3MDYYOxyJ0OA8BvZdzoEPpzc6WY0hm 6cxPlEJLjvIcCw4DlnHFA9KQ0zXVpXMQAaBM8STVsSZWgS3CMhqYv4MxXRNkqCFV S4JUPurBiiEHa9APEOXAkzYhPBtJoru0IdBg3IuJcfK8BZ9mFdRF40GsOepLBTR+ 5S8C5z47kbejp2Zg5TO5KP2ufZCsXIMbB/eSgaZlPLAraRvxAWXpZAZvd9hssvqy xajTx8SmMlOYJmmqk5nSPxcZQNmIp1VVBQRdH6Tw+wRDRnE4Z1tBgP/dou1N5UFu JHxc+4Uo+GuqBKB3TaIEKHF3MOAbY6M1ASeJ/LgUMvIrRKRCCqg= =6ZDa -----END PGP SIGNATURE----- --CGz8C8fAJAJAhiX9CH4GqgjgUIHa3PhG9--
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