From owner-freebsd-questions@freebsd.org Tue May 12 12:10:23 2020 Return-Path: Delivered-To: freebsd-questions@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 0FBDC2ED400 for ; Tue, 12 May 2020 12:10:23 +0000 (UTC) (envelope-from freebsd@edvax.de) Received: from mout.kundenserver.de (mout.kundenserver.de [212.227.126.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "mout.kundenserver.de", Issuer "TeleSec ServerPass Class 2 CA" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 49LxTB0TBrz49ws for ; Tue, 12 May 2020 12:10:21 +0000 (UTC) (envelope-from freebsd@edvax.de) Received: from r56.edvax.de ([94.222.0.87]) by mrelayeu.kundenserver.de (mreue011 [212.227.15.167]) with ESMTPA (Nemesis) id 1N7iT4-1j34sY1roA-014nDz; Tue, 12 May 2020 14:10:20 +0200 Date: Tue, 12 May 2020 14:10:20 +0200 From: Polytropon To: Nikita Stepanov Cc: freebsd-questions@freebsd.org Subject: Re: Recompiling the kernel increases performance? Message-Id: <20200512141020.a7c54fed.freebsd@edvax.de> In-Reply-To: <825101589284883@sas1-ffdbcd5f1d77.qloud-c.yandex.net> References: <825101589284883@sas1-ffdbcd5f1d77.qloud-c.yandex.net> Reply-To: Polytropon Organization: EDVAX X-Mailer: Sylpheed 3.1.1 (GTK+ 2.24.5; i386-portbld-freebsd8.2) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Provags-ID: V03:K1:i3KTZZO1QWPV5KMmyX4t4VgnS8wbYIKu3nUl5lStoxDYrdAJao5 HjvgsYuPfa/Xl4aZMjmLNqaNYjhMmw0AQHI6jAvRCPSuQs4FHEaFL4VrKuzcC5QlwmGiYZK niYQ6iimT+IiTSuczo9a1e7HImHlT7WGFML/UjZVylsUL8H+Lf/qUiFqWQqCmfHpnSacvzL nodVUVb86XeOjR0WipSYw== X-Spam-Flag: NO X-UI-Out-Filterresults: notjunk:1;V03:K0:lIpUXkubkPA=:jo54DZRW9iNe0fyACrIRsB eldUplKi6IIuaIJsBC7Opj0qIo4ibh7Fk944IDymz4Wl2oX+58nCWl85GM+a/UqeqbGEac/SV PKNDBDLbwXOi4h8TU8Nm9DX5sWwmynJYCu1zs4nePsyfv8emVnlbGu7OIEmW+qjHF4l53xh6E zYCR2r6QeaBDbVBT/qWt+C/5ky9aszBfidikdRklEyg6i+md9vFcU+zkx7d25zc4Z+IbgM22k fpT9DT891ye84IfqL0Md7l+AR1caoy9t4yUG7SfYaxX+fIgwjcE8oi1AI6x/1/zHdcj1wUjbJ Ww69hjHsiWSKXoL4PhNSa62MlMCB9Orew3gTQ+ILiZHgqM/OX5OLvp1gOr/2AVoqQtRl+wQMc oH6SivqHIB1CDn/ZEpo8FLGGOTE+HMuH+8FThj+3Y0OPpvTcigpaikDjnmllY3ZbeX0KrOMKM zTTqVLSW6zLLcyRLbiDvLbSDl7/p+JTBJvJJ5B7qR/qTet9XcGEBe8sljA4PBFKPdp4KIO/4Y ha7HdhKIUc+yS6pu92gh1SHoKx1F2O3TyA8OyhKkFv68YvHrm+ArCbkI6f4h7am6yaCF88a8R 97gL4/gx7vDhQNQAPS4NaPEkUbBXgSq4wb9xicxLdkccxDPG0FsMFzM8aV1o2Gmhwcbfw/K00 DYgfDBtVdYIeiwlCQts8UxVAONiIbCLdJ9LqGuxIM9mu5QBDgP0+QzZD2RVpX5IbvLjRpDiFU hd5ydhOsrVwNE6mfEW6yX2wZi2Y/dadl6anpHgcosVOJ32ZrmI8mUHH7vlNwKcsO30ZRY/I4V /Yt4uYllNWBcEnr5u5K5YupxTtZfQ+f2DGqr4jBuwQota0CXBxVxybeKRReucJKABx07V/w X-Rspamd-Queue-Id: 49LxTB0TBrz49ws X-Spamd-Bar: +++++ Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=none (mx1.freebsd.org: domain of freebsd@edvax.de has no SPF policy when checking 212.227.126.133) smtp.mailfrom=freebsd@edvax.de X-Spamd-Result: default: False [5.68 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; HAS_REPLYTO(0.00)[freebsd@edvax.de]; TO_DN_SOME(0.00)[]; MV_CASE(0.50)[]; HAS_ORG_HEADER(0.00)[]; RCPT_COUNT_TWO(0.00)[2]; RECEIVED_SPAMHAUS_PBL(0.00)[87.0.222.94.khpj7ygk5idzvmvt5x4ziurxhy.zen.dq.spamhaus.net : 127.0.0.11]; RCVD_TLS_LAST(0.00)[]; R_DKIM_NA(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; SUBJECT_ENDS_QUESTION(1.00)[]; ASN(0.00)[asn:8560, ipnet:212.227.0.0/16, country:DE]; ARC_NA(0.00)[]; REPLYTO_EQ_FROM(0.00)[]; FROM_HAS_DN(0.00)[]; MIME_GOOD(-0.10)[text/plain]; MIME_TRACE(0.00)[0:+]; DMARC_NA(0.00)[edvax.de]; AUTH_NA(1.00)[]; NEURAL_SPAM_MEDIUM(1.00)[0.999,0]; TO_MATCH_ENVRCPT_SOME(0.00)[]; NEURAL_SPAM_LONG(1.00)[1.000,0]; MID_CONTAINS_FROM(1.00)[]; RCVD_IN_DNSWL_NONE(0.00)[133.126.227.212.list.dnswl.org : 127.0.5.0]; R_SPF_NA(0.00)[]; RWL_MAILSPIKE_POSSIBLE(0.00)[133.126.227.212.rep.mailspike.net : 127.0.0.17]; RCVD_COUNT_TWO(0.00)[2]; IP_SCORE(0.28)[ip: (0.64), ipnet: 212.227.0.0/16(-1.20), asn: 8560(2.01), country: DE(-0.02)] X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 12 May 2020 12:10:23 -0000 On Tue, 12 May 2020 18:01:23 +0600, Nikita Stepanov wrote: > [nothing] Depends on what you put into your kernel configuration file. A kernel optimized for a system can lead to better performance. This has been true especially for systems with fewer resources. Note that only a specific optimization level is allowed for "buildkernel" (standard compiler optimization), while "buildworld" can usually utilize a higher optimization leve. You can find more here: https://www.freebsd.org/doc/handbook/kernelconfig.html This approach is interesting if you're working with embedded systems. On regular home PCs and servers, this is hardly done today, but of course still supported and possible. -- Polytropon Magdeburg, Germany Happy FreeBSD user since 4.0 Andra moi ennepe, Mousa, ...