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Mon, 06 Jul 2020 12:27:41 +0000 Received: from d06av22.portsmouth.uk.ibm.com (d06av22.portsmouth.uk.ibm.com [9.149.105.58]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 066CRcCP33292372 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 6 Jul 2020 12:27:38 GMT Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C26D04C044; Mon, 6 Jul 2020 12:27:38 +0000 (GMT) Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 518814C040; Mon, 6 Jul 2020 12:27:37 +0000 (GMT) Received: from pomme.local (unknown [9.145.43.127]) by d06av22.portsmouth.uk.ibm.com (Postfix) with ESMTP; Mon, 6 Jul 2020 12:27:37 +0000 (GMT) Subject: Re: [PATCH v12 00/31] Speculative page faults To: Chinwen Chang , Haiyan Song Cc: akpm@linux-foundation.org, mhocko@kernel.org, peterz@infradead.org, kirill@shutemov.name, ak@linux.intel.com, dave@stgolabs.net, jack@suse.cz, Matthew Wilcox , aneesh.kumar@linux.ibm.com, benh@kernel.crashing.org, mpe@ellerman.id.au, paulus@samba.org, Thomas Gleixner , Ingo Molnar , hpa@zytor.com, Will Deacon , Sergey Senozhatsky , sergey.senozhatsky.work@gmail.com, Andrea Arcangeli , Alexei Starovoitov , kemi.wang@intel.com, Daniel Jordan , David Rientjes , Jerome Glisse , Ganesh Mahendran , Minchan Kim , Punit Agrawal , vinayak menon , Yang Shi , zhong jiang , Balbir Singh , sj38.park@gmail.com, Michel Lespinasse , Mike Rapoport , linux-kernel@vger.kernel.org, linux-mm@kvack.org, haren@linux.vnet.ibm.com, npiggin@gmail.com, paulmck@linux.vnet.ibm.com, Tim Chen , linuxppc-dev@lists.ozlabs.org, x86@kernel.org, miles.chen@mediatek.com References: <20190416134522.17540-1-ldufour@linux.ibm.com> <20190606065129.d5s3534p23twksgp@haiyan.sh.intel.com> <3d3cefa2-0ebb-e86d-b060-7ba67c48a59f@linux.ibm.com> <1c412ebe-c213-ee67-d261-c70ddcd34b79@linux.ibm.com> <20190620081945.hwj6ruqddefnxg6z@haiyan.sh.intel.com> <1594027500.30360.32.camel@mtkswgap22> From: Laurent Dufour Message-ID: <490c0811-50cd-0802-2cbc-9c031ef309f6@linux.ibm.com> Date: Mon, 6 Jul 2020 14:27:36 +0200 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <1594027500.30360.32.camel@mtkswgap22> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235,18.0.687 definitions=2020-07-06_09:2020-07-06,2020-07-06 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 clxscore=1011 mlxlogscore=999 bulkscore=0 impostorscore=0 phishscore=0 mlxscore=0 spamscore=0 suspectscore=0 lowpriorityscore=0 priorityscore=1501 cotscore=-2147483648 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2007060090 X-Rspamd-Queue-Id: C84F718014CBB X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam05 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Le 06/07/2020 =C3=A0 11:25, Chinwen Chang a =C3=A9crit=C2=A0: > On Thu, 2019-06-20 at 16:19 +0800, Haiyan Song wrote: >> Hi Laurent, >> >> I downloaded your script and run it on Intel 2s skylake platform with = spf-v12 patch >> serials. >> >> Here attached the output results of this script. >> >> The following comparison result is statistics from the script outputs. >> >> a). Enable THP >> SPF_0 change = SPF_1 >> will-it-scale.page_fault2.per_thread_ops 2664190.8 -11.7% = 2353637.6 >> will-it-scale.page_fault3.per_thread_ops 4480027.2 -14.7% = 3819331.9 >> >> >> b). Disable THP >> SPF_0 change = SPF_1 >> will-it-scale.page_fault2.per_thread_ops 2653260.7 -10% = 2385165.8 >> will-it-scale.page_fault3.per_thread_ops 4436330.1 -12.4% = 3886734.2 >> >> >> Thanks, >> Haiyan Song >> >> >> On Fri, Jun 14, 2019 at 10:44:47AM +0200, Laurent Dufour wrote: >>> Le 14/06/2019 =C3=A0 10:37, Laurent Dufour a =C3=A9crit : >>>> Please find attached the script I run to get these numbers. >>>> This would be nice if you could give it a try on your victim node an= d share the result. >>> >>> Sounds that the Intel mail fitering system doesn't like the attached = shell script. >>> Please find it there: https://gist.github.com/ldu4/a5cc1a93f293108ea3= 87d43d5d5e7f44 >>> >>> Thanks, >>> Laurent. >>> >=20 > Hi Laurent, >=20 > We merged SPF v11 and some patches from v12 into our platforms. After > several experiments, we observed SPF has obvious improvements on the > launch time of applications, especially for those high-TLP ones, >=20 > # launch time of applications(s): >=20 > package version w/ SPF w/o SPF improve(%) > ------------------------------------------------------------------ > Baidu maps 10.13.3 0.887 0.98 9.49 > Taobao 8.4.0.35 1.227 1.293 5.10 > Meituan 9.12.401 1.107 1.543 28.26 > WeChat 7.0.3 2.353 2.68 12.20 > Honor of Kings 1.43.1.6 6.63 6.713 1.24 That's great news, thanks for reporting this! >=20 > By the way, we have verified our platforms with those patches and > achieved the goal of mass production. Another good news! For my information, what is your targeted hardware? Cheers, Laurent.