From owner-freebsd-hackers@freebsd.org Mon Jan 28 12:20:16 2019 Return-Path: Delivered-To: freebsd-hackers@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 637A714B1E48 for ; Mon, 28 Jan 2019 12:20:16 +0000 (UTC) (envelope-from bu7cher@yandex.ru) Received: from forward105o.mail.yandex.net (forward105o.mail.yandex.net [IPv6:2a02:6b8:0:1a2d::608]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id E69C388F97 for ; Mon, 28 Jan 2019 12:20:14 +0000 (UTC) (envelope-from bu7cher@yandex.ru) Received: from mxback13o.mail.yandex.net (mxback13o.mail.yandex.net [IPv6:2a02:6b8:0:1a2d::64]) by forward105o.mail.yandex.net (Yandex) with ESMTP id 18EF142022F6; Mon, 28 Jan 2019 15:20:04 +0300 (MSK) Received: from smtp3p.mail.yandex.net (smtp3p.mail.yandex.net [2a02:6b8:0:1472:2741:0:8b6:8]) by mxback13o.mail.yandex.net (nwsmtp/Yandex) with ESMTP id N3UAKkgpGX-K3guLog5; Mon, 28 Jan 2019 15:20:04 +0300 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yandex.ru; s=mail; t=1548678004; bh=DxxuSo0LUR7irQatXzGWAilg66p87UksFIiStA7F0rc=; h=Subject:To:References:From:Message-ID:Date:In-Reply-To; b=ayEvjbvoCjz684Vml0dalL9b21d6kPMj+qrku9PkczUiIOexFV3t7uaYXk4AEwQ0H iP+Ks/XT7nTpZfn3va96WtpvheyMqSQwEz2DUAuPAFvt+mVSWyfNuwPG5rYFRVsreA 3aNK8xBygJzDDKFfjK/kCbdxYrzWrw11fCAlUSzI= Received: by smtp3p.mail.yandex.net (nwsmtp/Yandex) with ESMTPSA id T4F4aXYyoG-K3kmkLe6; Mon, 28 Jan 2019 15:20:03 +0300 (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client certificate not present) Subject: Re: CPU Isolation To: Mark Saad , FreeBSD Hackers References: From: "Andrey V. Elsukov" Openpgp: id=E6591E1B41DA1516F0C9BC0001C5EA0410C8A17A Autocrypt: addr=bu7cher@yandex.ru; prefer-encrypt=mutual; keydata= mQENBEwBF1kBCADB9sXFhBEUy8qQ4X63Y8eBatYMHGEFWN9ypS5lI3RE6qQW2EYbxNk7qUC5 21YIIS1mMFVBEfvR7J9uc7yaYgFCEb6Sce1RSO4ULN2mRKGHP3/Sl0ijZEjWHV91hY1YTHEF ZW/0GYinDf56sYpDDehaBF5wkWIo1+QK5nmj3vl0DIDCMNd7QEiWpyLVwECgLX2eOAXByT8B bCqVhJGcG6iFP7/B9Ll6uX5gb8thM9LM+ibwErDBVDGiOgvfxqidab7fdkh893IBCXa82H9N CNwnEtcgzh+BSKK5BgvPohFMgRwjti37TSxwLu63QejRGbZWSz3OK3jMOoF63tCgn7FvABEB AAG0JUFuZHJleSBWLiBFbHN1a292IDxidTdjaGVyQHlhbmRleC5ydT6JATgEEwECACIFAkwB F1kCGwMGCwkIBwMCBhUIAgkKCwQWAgMBAh4BAheAAAoJEAHF6gQQyKF6qmYIAI6ekfm1VA4T vqankI1ISE6ku4jV7UlpIQlEbE7/8n3Zd6teJ+pGOQhN5qk8QE7utdPdbktAzi+x7LIJVzUw 4TywZLXGrkP7VKYkfg6oyCGyzITghefQeJtr2TN4hYCkzPWpylkue8MtmqfZv/6royqwTbN+ +E09FQNvTgRUYJYTeQ1qOsxNRycwvw3dr2rOfuxShbzaHBB1pBIjGrMg8fC5pd65ACH5zuFV A0CoTNGMDrEZSfBkTW604UUHFFXeCoC3dwDZRKOWJ3GmMXns65Ai5YkA63BSHEE1Qle3VBhd cG1w0CB5FBV3pB27UVnf0jEbysrDqW4qN7XMRFSWNAy5AQ0ETAEXWQEIAJ2p6l9LBoqdH/0J PEFDY2t2gTvAuzz+8zs3R03dFuHcNbOwjvWCG0aOmVpAzkRa8egn5JB4sZaFUtKPYJEQ1Iu+ LUBwgvtXf4vWpzC67zs2dDuiW4LamH5p6xkTD61aHR7mCB3bg2TUjrDWn2Jt44cvoYxj3dz4 S49U1rc9ZPgD5axCNv45j72tggWlZvpefThP7xT1OlNTUqye2gAwQravXpZkl5JG4eOqJVIU X316iE3qso0iXRUtO7OseBf0PiVmk+wCahdreHOeOxK5jMhYkPKVn7z1sZiB7W2H2TojbmcK HZC22sz7Z/H36Lhg1+/RCnGzdEcjGc8oFHXHCxUAEQEAAYkBHwQYAQIACQUCTAEXWQIbDAAK CRABxeoEEMihegkYCAC3ivGYNe2taNm/4Nx5GPdzuaAJGKWksV+w9mo7dQvU+NmI2az5w8vw 98OmX7G0OV9snxMW+6cyNqBrVFTu33VVNzz9pnqNCHxGvj5dL5ltP160JV2zw2bUwJBYsgYQ WfyJJIM7l3gv5ZS3DGqaGIm9gOK1ANxfrR5PgPzvI9VxDhlr2juEVMZYAqPLEJe+SSxbwLoz BcFCNdDAyXcaAzXsx/E02YWm1hIWNRxanAe7Vlg7OL+gvLpdtrYCMg28PNqKNyrQ87LQ49O9 50IIZDOtNFeR0FGucjcLPdS9PiEqCoH7/waJxWp6ydJ+g4OYRBYNM0EmMgy1N85JJrV1mi5i Message-ID: <0e842838-e7d0-1b86-e27e-8d1562e70aee@yandex.ru> Date: Mon, 28 Jan 2019 15:16:49 +0300 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 In-Reply-To: Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="n1dsZjHoErZsGcMnWjuLjoEBRHUEQgIBG" X-Rspamd-Queue-Id: E69C388F97 X-Spamd-Bar: ------- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=yandex.ru header.s=mail header.b=ayEvjbvo; dmarc=pass (policy=none) header.from=yandex.ru; spf=pass (mx1.freebsd.org: domain of bu7cher@yandex.ru designates 2a02:6b8:0:1a2d::608 as permitted sender) smtp.mailfrom=bu7cher@yandex.ru X-Spamd-Result: default: False [-7.92 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; R_SPF_ALLOW(-0.20)[+ip6:2a02:6b8:0:1a2d::/64]; FREEMAIL_FROM(0.00)[yandex.ru]; HAS_ATTACHMENT(0.00)[]; RCVD_COUNT_THREE(0.00)[4]; TO_DN_ALL(0.00)[]; DKIM_TRACE(0.00)[yandex.ru:+]; RCPT_COUNT_TWO(0.00)[2]; DMARC_POLICY_ALLOW(-0.50)[yandex.ru,none]; MX_GOOD(-0.01)[mx.yandex.ru,mx.yandex.ru,mx.yandex.ru,mx.yandex.ru,mx.yandex.ru]; SIGNED_PGP(-2.00)[]; NEURAL_HAM_SHORT(-0.98)[-0.978,0]; RCVD_IN_DNSWL_LOW(-0.10)[8.0.6.0.0.0.0.0.0.0.0.0.0.0.0.0.d.2.a.1.0.0.0.0.8.b.6.0.2.0.a.2.list.dnswl.org : 127.0.5.1]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+,1:+,2:+]; FREEMAIL_ENVFROM(0.00)[yandex.ru]; ASN(0.00)[asn:13238, ipnet:2a02:6b8::/32, country:RU]; MID_RHS_MATCH_FROM(0.00)[]; DWL_DNSWL_NONE(0.00)[yandex.ru.dwl.dnswl.org : 127.0.5.0]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; R_DKIM_ALLOW(-0.20)[yandex.ru:s=mail]; RCVD_TLS_LAST(0.00)[]; FROM_HAS_DN(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; MIME_GOOD(-0.20)[multipart/signed,multipart/mixed,text/plain]; IP_SCORE(-1.73)[ipnet: 2a02:6b8::/32(-4.81), asn: 13238(-3.84), country: RU(0.00)]; TO_MATCH_ENVRCPT_SOME(0.00)[] X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 28 Jan 2019 12:20:16 -0000 This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --n1dsZjHoErZsGcMnWjuLjoEBRHUEQgIBG Content-Type: multipart/mixed; boundary="F2gXP0dA6UoPVGIH3Uk1bFYMwwWbkACYw"; protected-headers="v1" From: "Andrey V. Elsukov" To: Mark Saad , FreeBSD Hackers Message-ID: <0e842838-e7d0-1b86-e27e-8d1562e70aee@yandex.ru> Subject: Re: CPU Isolation References: In-Reply-To: --F2gXP0dA6UoPVGIH3Uk1bFYMwwWbkACYw Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 22.01.2019 21:29, Mark Saad wrote: > All > I am looking to setup a 12-STABLE box in a way that is similar to a > CentOS server I am running. > That server is setup using the boot option isocpus, to remove > cores/cpus from the kernel scheduler at boot. What I want to try on > 12-STABLE is to set aside some cores to run process and some kernel > threads that will only always run on a dedicated core with out the > chance for being preempted / interrupted by something else on that > core / cpu . What I do not see is a way to evict processes off a > running cpu post boot or a way to isolate them preboot. Am I missing > something? >=20 After r331723 it is possible to make such separation after boot using cpuset(8). If you need this a bit early, you need to modify sbin/init. --=20 WBR, Andrey V. Elsukov --F2gXP0dA6UoPVGIH3Uk1bFYMwwWbkACYw-- --n1dsZjHoErZsGcMnWjuLjoEBRHUEQgIBG Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Comment: Using GnuPG with Thunderbird - https://www.enigmail.net/ iQEzBAEBCAAdFiEE5lkeG0HaFRbwybwAAcXqBBDIoXoFAlxO8rUACgkQAcXqBBDI oXrUmwf+PNpNxaqaxlfS3Xv02p+TimpKZIAUes9qcbovqsvwD9u9WWLF6AoDdbZJ iH5OmIHAQ+8iGvsZdqvW24pvnVRL0m+aTiQHO+6MSS3UnIXL0l91SuJLpWT5Y5D5 UvVVgo6duYR4tPuR7fW7AtVSE+AI7hZOElxOdNUpx1ZBmwc7TijQUBxoLTbx4rjh ANxueth/hOBTYPzShOyOOHJCPwDEfzbDmGHnrxh+3AZ17dvC3Daz2vhX85l9Zbr5 +z/zFS/EIHhacoK+g2PNxpOWm0SZoPpCGY09vKjibMZ9qlo1M8g3yeCtXzpOpWK6 Y1RObnfpCIhUJhladTfpWwnvajSLkg== =INDL -----END PGP SIGNATURE----- --n1dsZjHoErZsGcMnWjuLjoEBRHUEQgIBG--