From owner-freebsd-hackers@freebsd.org Tue Nov 6 04:01:44 2018 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 36BF5112E07A for ; Tue, 6 Nov 2018 04:01:44 +0000 (UTC) (envelope-from steevanxperia@gmail.com) Received: from mail-ot1-x32e.google.com (mail-ot1-x32e.google.com [IPv6:2607:f8b0:4864:20::32e]) (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 8B4AE8A3EE for ; Tue, 6 Nov 2018 04:01:43 +0000 (UTC) (envelope-from steevanxperia@gmail.com) Received: by mail-ot1-x32e.google.com with SMTP id g10so10209331otl.12 for ; Mon, 05 Nov 2018 20:01:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=iqMwWh+NMIZrllo0q/OgO/NI7g7PN8gikl8T+VHwDrE=; b=YFETp8113C5y4av3COjOvFik+1AqAc++g0D9HorjVqy5STm3u8J1IqahouXoHYG2lG 6TUstRFazkGcXZWcqRRdfJ+z5fMoo7anI1CqawuixPjx1rL8x4sUlWGGTBj/M2f8Nwds QdKK77aFfry/2hvalq74i3iH57jGZzy7eDD1m8q58F76CTRUnwnk24RHpZHUjj4Cd0Os 3dps2Bf+c144JlpxeqjghgnkDNhPSF3hih3oH+V754v4LKUOWvEFUVQcHU7o6vf7YAOp vfZ6alDDQZHCUVVP4JMp9sjj4LCm5/S8iQ6aHquFba0e56Og55cZWr76nzIWWb2HApLb dmTQ== 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=iqMwWh+NMIZrllo0q/OgO/NI7g7PN8gikl8T+VHwDrE=; b=ntjul51HpBMgf9TscJ/S7ZOM91knwnKYcE5zHbwawVTSD5C2gVdkWAk0tzmmZTIFSz DuODC1iO4Htn0G+vVw9rjawpkplUuJp+ET7CnrR1cb0J32GUtJmadrzokbZrZXACLGTT vHeBosB1J5QQ8s1UEfHuUSbNvm+5rWvFZsVlC36ZNsoLFuiv1BZlBEmWp1CgQWtvTPkQ MgeLTs3/u7Yj/kSBSDMPsjVBpJvJ28BLLuwis7Y1obLztYv1OOP10L0Slt1KmEMhOcfO lIlCMAsa1NmOZftpGVeYVuVFjJJLHvzXd2FE77MaWDkfxU2WFXsqjUl9tfcdqptZ3DLJ hBsw== X-Gm-Message-State: AGRZ1gLfyTX7FzsHyedvTkcllTCB/d/SgYZAYsyBP2IbpuLddIjjgo18 2C6D7KsofA+aK0nI9BwtmeYx+qftbj/IbyFzNUbAXkIi X-Google-Smtp-Source: AJdET5edmWcFrAiksHCV/N1eMXzjAJLSuT9o3sfIDQK3PUsE7j7SRLlhRFQEyYeLZUGknGMWzogw4XMkxsd/LivYXgk= X-Received: by 2002:a9d:7692:: with SMTP id j18mr15111030otl.217.1541476902426; Mon, 05 Nov 2018 20:01:42 -0800 (PST) MIME-Version: 1.0 From: Steevan Rodrigues Date: Tue, 6 Nov 2018 09:31:30 +0530 Message-ID: Subject: FreeBSD 11.x thread creation time is 9000+ microseconds on Intel Xeon Gold series CPU To: freebsd-hackers@freebsd.org X-Rspamd-Queue-Id: 8B4AE8A3EE X-Spamd-Result: default: False [-0.81 / 200.00]; R_SPF_ALLOW(-0.20)[+ip6:2607:f8b0:4000::/36]; FREEMAIL_FROM(0.00)[gmail.com]; HAS_ATTACHMENT(0.00)[]; TO_DN_NONE(0.00)[]; DKIM_TRACE(0.00)[gmail.com:+]; MIME_BASE64_TEXT(0.10)[]; DMARC_POLICY_ALLOW(-0.50)[gmail.com,none]; MX_GOOD(-0.01)[cached: alt3.gmail-smtp-in.l.google.com]; FROM_EQ_ENVFROM(0.00)[]; IP_SCORE(-0.46)[ipnet: 2607:f8b0::/32(-0.81), asn: 15169(-1.40), country: US(-0.07)]; RCVD_TLS_LAST(0.00)[]; FREEMAIL_ENVFROM(0.00)[gmail.com]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US]; MIME_UNKNOWN(0.10)[text/x-csrc]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-0.71)[-0.714,0]; R_DKIM_ALLOW(-0.20)[gmail.com]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; NEURAL_HAM_LONG(-0.65)[-0.652,0]; MIME_GOOD(-0.10)[multipart/mixed,multipart/alternative,text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-hackers@freebsd.org]; MIME_BAD_ATTACHMENT(1.60)[c]; RCPT_COUNT_ONE(0.00)[1]; NEURAL_SPAM_SHORT(0.23)[0.225,0]; RCVD_IN_DNSWL_NONE(0.00)[e.2.3.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.0.4.6.8.4.0.b.8.f.7.0.6.2.list.dnswl.org : 127.0.5.0]; RCVD_COUNT_TWO(0.00)[2] X-Rspamd-Server: mx1.freebsd.org Content-Type: text/plain; charset="UTF-8" X-Content-Filtered-By: Mailman/MimeDel 2.1.29 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, 06 Nov 2018 04:01:44 -0000 Hi , I am seeing a FreeBSD 11.x OS poor performance issue . CPU is Intel(R) Xeon(R) Gold 5115 CPU @ 2.40GHz ( dual socket CPU with 10 cores per socket ) I have attached a simple program which creates thread and computes time taken to create this thread. On this CPU with FreeBSD 11.x OS it takes 9000 to 15000 micro seconds ( us) to create just one thread. On other platforms this thread creation time is usually 20 to 30 us only. Any idea why it takes so much more time with FreeBSD 11.x ? Is there any processor specific tuning that needs to be done ? Thanks, Steevan