From owner-svn-src-all@freebsd.org Mon Dec 30 21:41:05 2019 Return-Path: Delivered-To: svn-src-all@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 ABAFE1EAF36; Mon, 30 Dec 2019 21:41:05 +0000 (UTC) (envelope-from alc@rice.edu) Received: from mx0a-0010f301.pphosted.com (mx0a-0010f301.pphosted.com [148.163.149.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "*.pphosted.com", Issuer "Thawte RSA CA 2018" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 47mrTX4V22z4WWL; Mon, 30 Dec 2019 21:41:04 +0000 (UTC) (envelope-from alc@rice.edu) Received: from pps.filterd (m0102855.ppops.net [127.0.0.1]) by mx0b-0010f301.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id xBULaDHo018302; Mon, 30 Dec 2019 15:41:02 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rice.edu; h=subject : to : references : from : message-id : date : mime-version : in-reply-to : content-type : content-transfer-encoding; s=ricemail; bh=CWg6+FyIDPaHENIR2FI74Tpm3RfEx8k+kIgWIak+GBE=; b=a4dn9weA4Wt1jJbbpv3+uPzKhUbQ/lr7V8xz4ldXFsUNjtUmYBaXtjDzAfePRpJckFIm MzD8Jj3oEqWyamXAQBW3LZK0k+Zr5KdmkrAm/2rjDGuJe8JyrT+aMACJjmpBcuZBPdSC uBQcbi/iiLif1bTfqJHBglr9suxGH56MxCROlopav+JIms8cFzNV/13fGYcamTYrknNo zLNttMIhbYbFbR3w3g02tPWAUo1MJCy+kqwpcYZVm9nr2GKoIfLtIx38GOsPFkps7zJ2 KMahw7NYjk2b5VvN6tb+YBqcS/TgHhW6SrysfmfbCp2qTIVOLjUladkiVDpc8jR3WfN/ tw== Received: from mh3.mail.rice.edu (mh3.mail.rice.edu [128.42.199.10]) by mx0b-0010f301.pphosted.com with ESMTP id 2x658chvck-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 30 Dec 2019 15:41:02 -0600 Received-X: from mh3.mail.rice.edu (localhost.localdomain [127.0.0.1]) by mh3.mail.rice.edu (Postfix) with ESMTP id 77B0A40591; Mon, 30 Dec 2019 15:41:01 -0600 (CST) Received-X: from mh3.mail.rice.edu (localhost.localdomain [127.0.0.1]) by mh3.mail.rice.edu (Postfix) with ESMTP id 767494058F; Mon, 30 Dec 2019 15:41:01 -0600 (CST) X-Virus-Scanned: by amavis-2.7.0 at mh3.mail.rice.edu, auth channel Received-X: from mh3.mail.rice.edu ([127.0.0.1]) by mh3.mail.rice.edu (mh3.mail.rice.edu [127.0.0.1]) (amavis, port 10026) with ESMTP id OWW79q0EwMD6; Mon, 30 Dec 2019 15:41:01 -0600 (CST) Received: from 108-254-203-201.lightspeed.hstntx.sbcglobal.net (108-254-203-201.lightspeed.hstntx.sbcglobal.net [108.254.203.201]) (using TLSv1.2 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) (Authenticated sender: alc) by mh3.mail.rice.edu (Postfix) with ESMTPSA id 1B51F40429; Mon, 30 Dec 2019 15:41:01 -0600 (CST) Subject: Re: svn commit: r356207 - in head/sys/arm64: arm64 include To: Colin Percival , Alan Cox , src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org References: <201912302030.xBUKUWAO044693@repo.freebsd.org> <0100016f589bb7e4-ad3fd7d7-ffaa-4097-9e8f-ee0828daf017-000000@email.amazonses.com> From: Alan Cox Message-ID: <1e67ebf7-20ab-a007-1f62-04bc0cb7cfcb@rice.edu> Date: Mon, 30 Dec 2019 15:41:00 -0600 User-Agent: Mozilla/5.0 (X11; FreeBSD i386; rv:68.0) Gecko/20100101 Thunderbird/68.3.0 MIME-Version: 1.0 In-Reply-To: <0100016f589bb7e4-ad3fd7d7-ffaa-4097-9e8f-ee0828daf017-000000@email.amazonses.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.95,18.0.572 definitions=2019-12-30_06:2019-12-27,2019-12-30 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 phishscore=0 adultscore=0 impostorscore=0 mlxlogscore=711 priorityscore=1501 clxscore=1015 suspectscore=0 bulkscore=0 malwarescore=0 spamscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-1910280000 definitions=main-1912300195 X-Rspamd-Queue-Id: 47mrTX4V22z4WWL X-Spamd-Bar: -------- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=rice.edu header.s=ricemail header.b=a4dn9weA; dmarc=pass (policy=none) header.from=rice.edu; spf=pass (mx1.freebsd.org: domain of alc@rice.edu designates 148.163.149.254 as permitted sender) smtp.mailfrom=alc@rice.edu X-Spamd-Result: default: False [-8.45 / 15.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; R_DKIM_ALLOW(-0.20)[rice.edu:s=ricemail]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; R_SPF_ALLOW(-0.20)[+a:a32.spf.rice.edu]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; MIME_GOOD(-0.10)[text/plain]; RCVD_TLS_LAST(0.00)[]; DWL_DNSWL_MED(-2.00)[rice.edu.dwl.dnswl.org : 127.0.11.2]; RCPT_COUNT_FIVE(0.00)[5]; RCVD_COUNT_THREE(0.00)[4]; TO_MATCH_ENVRCPT_SOME(0.00)[]; DKIM_TRACE(0.00)[rice.edu:+]; DMARC_POLICY_ALLOW(-0.50)[rice.edu,none]; IP_SCORE(-3.35)[ip: (-9.90), ipnet: 148.163.148.0/22(-4.80), asn: 26211(-2.02), country: US(-0.05)]; RCVD_IN_DNSWL_LOW(-0.10)[254.149.163.148.list.dnswl.org : 127.0.3.1]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:26211, ipnet:148.163.148.0/22, country:US]; MID_RHS_MATCH_FROM(0.00)[] X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 30 Dec 2019 21:41:05 -0000 On 12/30/19 2:59 PM, Colin Percival wrote: > On 2019-12-30 12:30, Alan Cox wrote: >> Author: alc >> Date: Mon Dec 30 20:30:31 2019 >> New Revision: 356207 >> URL: https://svnweb.freebsd.org/changeset/base/356207 >> >> Log: >> Determine whether the MMU hardware is capable of updating a page table >> entry's access flag and dirty state, and enable this feature when it's >> available. > Am I right in thinking that this should result in improved performance under > load? (I'm wondering if it's time to redo my amd64 vs arm64 EC2 benchmarks.) > Yes, a modest one.