From owner-freebsd-hackers@freebsd.org Tue Jan 22 18:29:52 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 628B214AAC40 for ; Tue, 22 Jan 2019 18:29:52 +0000 (UTC) (envelope-from nonesuch@longcount.org) Received: from mail-ed1-x530.google.com (mail-ed1-x530.google.com [IPv6:2a00:1450:4864:20::530]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id E6F4297A5C for ; Tue, 22 Jan 2019 18:29:50 +0000 (UTC) (envelope-from nonesuch@longcount.org) Received: by mail-ed1-x530.google.com with SMTP id d39so20078821edb.12 for ; Tue, 22 Jan 2019 10:29:50 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=longcount-org.20150623.gappssmtp.com; s=20150623; h=mime-version:from:date:message-id:subject:to; bh=uFbTPEkRsutpt8eR6Vq5NDd7Jhhr3i7zW4UbGSQpBnw=; b=bmIA+u1YcqdqsQaSuUGH9LhVPcO053ui2vIE5pZwtwIyr9gfdB50IWjIIVSQKaxfL/ HdfBP5xNkVIcG9gx7qApyuXZcKV9J7Vb0fsLTXD+Cnk5JI47qw/wW+nBh6fVnDPp0lyv lnKXFFJqfgApKK/oLni4kuz8Daa9TTxAC6+fDcGNwI+fdSSIbrxaC+2Ocueibc1VGujc uaSWKXPVD8HqijIotW4jwDLI9D8Tpmcjj4N0f0pNiHTPC5m24RanzATrppOV4QEwyf75 EoR0MZ6pmVdB38FtVC4e+aIDMEYcfVbaczuBX/s0a5YSkLGsP+5Rzs69KimUYHVAIg4i Vw7w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=uFbTPEkRsutpt8eR6Vq5NDd7Jhhr3i7zW4UbGSQpBnw=; b=Ajl781WFGRE4t7hXTbOT5pOsbP0hppYnKFLS7THs2AdaPDtLefBg3oGAl8KvD5TSYS T8rMigOqqaYXyaYn7mT8jjAkObaGP/UIKcU/2KWVG94e+waIm2Qg1hzYx0aPxcE48RDr 2yO17w1iJiPZEu2+/m3bOdrZ40J4lHv6pOK6Jo9rLBzmMZ4qtbOrKSDA8HmUYuJezWsY QPGCAookI3haZH/3j2WdKau0n1cqBMq9VznBfl9UoDl/NF0djrZW4rXD9D1R7g0DDLMr D6dZEIPh0f9ylh3fzDsHYPUWw2RmvTrKtEd4t18mS3AHESxynLAcPUW0VLYkHzr5/Ypj l3Cg== X-Gm-Message-State: AJcUukfY21VbH19CI6QDHl+p3+1D75pfjYOIzfhW7J1TFXW7mouLYKVE Ep4kSOjQyRyzCsSw/w53V3pCFGDJYTAgnXdYsMdXFREJ X-Google-Smtp-Source: ALg8bN5YmzcNh6IE0MJua6+1yVBd40XaCYGa31srkmEGqJQ93k59ht9hwF0L7QhkzrkHCfVurB8sSEMawKNHBsAVQcY= X-Received: by 2002:a17:906:94c3:: with SMTP id d3-v6mr28821407ejy.104.1548181788902; Tue, 22 Jan 2019 10:29:48 -0800 (PST) MIME-Version: 1.0 From: Mark Saad Date: Tue, 22 Jan 2019 13:29:37 -0500 Message-ID: Subject: CPU Isolation To: FreeBSD Hackers Content-Type: text/plain; charset="UTF-8" X-Rspamd-Queue-Id: E6F4297A5C X-Spamd-Bar: ----- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=longcount-org.20150623.gappssmtp.com header.s=20150623 header.b=bmIA+u1Y X-Spamd-Result: default: False [-5.72 / 15.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-0.99)[-0.990,0]; R_DKIM_ALLOW(-0.20)[longcount-org.20150623.gappssmtp.com:s=20150623]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-hackers@freebsd.org]; DMARC_NA(0.00)[longcount.org]; RCPT_COUNT_ONE(0.00)[1]; IP_SCORE(-2.63)[ip: (-8.98), ipnet: 2a00:1450::/32(-2.18), asn: 15169(-1.89), country: US(-0.08)]; TO_DN_ALL(0.00)[]; DKIM_TRACE(0.00)[longcount-org.20150623.gappssmtp.com:+]; MX_GOOD(-0.01)[alt1.aspmx.l.google.com,aspmx.l.google.com,aspmx5.googlemail.com,aspmx4.googlemail.com,aspmx3.googlemail.com,alt2.aspmx.l.google.com,aspmx2.googlemail.com]; RCVD_IN_DNSWL_NONE(0.00)[0.3.5.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.0.4.6.8.4.0.5.4.1.0.0.a.2.list.dnswl.org : 127.0.5.0]; NEURAL_HAM_SHORT(-0.79)[-0.790,0]; R_SPF_NA(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RCVD_TLS_LAST(0.00)[]; ASN(0.00)[asn:15169, ipnet:2a00:1450::/32, country:US]; RCVD_COUNT_TWO(0.00)[2] 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: Tue, 22 Jan 2019 18:29:52 -0000 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? -- mark saad | nonesuch@longcount.org