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Petersen" , LKML , Linux Memory Management List , , , , , , , Subject: Re: [ata] 0568e61225: stress-ng.copy-file.ops_per_sec -15.0% regression Message-ID: References: <1f498d4a-f93f-ceb4-b713-753196e5e08d@opensource.wdc.com> <3451fa5a-6229-073f-ae18-0c232cd48ed5@huawei.com> <2e9cf5a6-c043-5ccf-e363-097c6c941891@huawei.com> Content-Type: text/plain; charset="iso-8859-1" Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-ClientProxiedBy: SG2P153CA0016.APCP153.PROD.OUTLOOK.COM (2603:1096::26) To SJ1PR11MB6297.namprd11.prod.outlook.com (2603:10b6:a03:458::8) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 9d90bf48-44a9-4d20-692e-08da7f548ef5 X-MS-TrafficTypeDiagnostic: MN2PR11MB4565:EE_ X-LD-Processed: 46c98d88-e344-4ed4-8496-4ed7712e255d,ExtAddr X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:SJ1PR11MB6297.namprd11.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230016)(7916004)(136003)(396003)(346002)(39860400002)(376002)(366004)(966005)(41300700001)(54906003)(316002)(478600001)(38100700002)(4326008)(33716001)(6486002)(26005)(66946007)(8676002)(8936002)(44832011)(66556008)(5660300002)(6916009)(66476007)(2906002)(53546011)(186003)(86362001)(6506007)(82960400001)(6666004)(6512007)(83380400001)(9686003);DIR:OUT;SFP:1102; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?iso-8859-1?Q?3PKtVRFGOgLYEwzUkb+5f7Dd19fZG06B4hFwfjEKEGJoCsJS5kZwGbK/PO?= =?iso-8859-1?Q?pBmbvb8okb4BtdO8+tE14js7gnwny9XtKVsJ7o8ZlD5gvnTKDHdbk/F7Z5?= =?iso-8859-1?Q?8jhjCIvzg9FE7BIQQn828AHGHTAJlMwF3hb7a36LoaRL/T2w0HgG6LGSfk?= =?iso-8859-1?Q?JM6adJz56KqJS/l2/0XzIGHN1g295YQVpugLRAzbjtsm9WMu1/oHyg2Agm?= =?iso-8859-1?Q?VMN/2yvvu/wUTGRS36Zu45DGPoCTT+TtlhJsVJd5IqTqjyOlGrhpzIL0pv?= =?iso-8859-1?Q?AEcB84dHwTIFh2gMH0AGoLSdkDgaDAcIjgNmrtlv5OiAir604hkpRMhfw/?= =?iso-8859-1?Q?5IL/OaotkLb2kNM4SyqUnLDf+HKVCgPwXrQ5VISjollEFzEPMn8QLt8JC6?= =?iso-8859-1?Q?KrgNAVjRtLPHKBKpPre1/DNLUvmLgHBTRXDxuWbOcahgEjp48lH9bei4p1?= =?iso-8859-1?Q?2I40HYjrMq8/EvyAQPSXDRcNZ2H9FCxpsHwEHDZFjtVECuxlFeuuFdCPc4?= =?iso-8859-1?Q?tRtdSmi350DLI9BSNEcwnTS5IYN8cWL4gIS3FacErMWfNRgqpEHLXKpLef?= =?iso-8859-1?Q?5Xr279fcReGo5YJz4mg76boPxs58LehI1Ek5PjcbXzdJCcLjdNpnVaKlK5?= =?iso-8859-1?Q?a8aDSiH7Y8tstlnAYWQUJAlZ3utmDyTzwUlah+PBWlIoY0aI8IZWp6+r8Q?= =?iso-8859-1?Q?FMwP3RqavRy8KTxByQqagWBC3FeI8Rvh9VpueZhW4quPuP+Yf8C91wEZc+?= =?iso-8859-1?Q?crejCH0oRMOtoH+C8eIZ7JBs59VSWH0+A5sB0khPEUm51Ci5mD0KDmp6gp?= =?iso-8859-1?Q?daNf64LbNiIerRw2MGUnCYZFALQhAYTSiGAZQorPwPhI6QpiN9mg5poe9S?= =?iso-8859-1?Q?abIRkW5K9naG+SPJ58TW7u9hZw+4UHIteUeZWKJF7212PZVdQbvQvND0Wt?= =?iso-8859-1?Q?HxapPUblE0bTGv0kVtTfMhkZzYXPOjKIauLxrxaJcwwJnswsJwjXyqxCCx?= =?iso-8859-1?Q?I0KVYHTqYxAlJBM6Go+2+k25gnBR0WPuZ35EcigBYKoT7RcgFnMB3Hk0Em?= =?iso-8859-1?Q?KOTlX4Cmn6QfSjz1Mj8gGZbSl31/ziQCUGMjv7hPpFGuFqDh6A+hP8BnyE?= =?iso-8859-1?Q?SUPoVvEMVojwAgahZIwgmQASrvnp9PrY2DsdBEr0v/2ZPjVcdn9gghuX1C?= =?iso-8859-1?Q?wopewVvUGEUy5zm6w16RQyjK8CtSmVoZr4ugm2re0+pi35dzXNAtXke+Wg?= =?iso-8859-1?Q?o7nePULvlRya1S1ww0gVQBgVWrCq9LpgwgmqqbnLTQkOs0FzELDMhvRn+t?= =?iso-8859-1?Q?KytiPObmmX+DNpXM4IXTIRERlFU1BmH/4Bo0ElDYhgipUToQDVBeXmF3bl?= =?iso-8859-1?Q?qiAQiNgkou3BKBX9w6jpmkBqBJoSe7ZH1nMeCY1Ns/x5kvq8eDQ0Hv/9D7?= =?iso-8859-1?Q?YcyepGlZzkNHhNTN0nF9hTMMRF8VUa64A27pNgiCguP8anuTjkvVYaBJME?= =?iso-8859-1?Q?5I01pT7Ri2Avh07H+O0zTC8Be0bUPmi5SG+dIeC6ZUgshC+s1i/Y9F3LK2?= =?iso-8859-1?Q?oFVRY+63j/vEnDq74wOLlnlMzX+RV5vb3xJmTmqe/e5fh7L1hJJqXupjd/?= =?iso-8859-1?Q?9tSD3yDBth+RDletCxYCjOJnYuQNbKMl1Nr1CbzOxwSPPJTIe/dUIlzw?= =?iso-8859-1?Q?=3D=3D?= X-MS-Exchange-CrossTenant-Network-Message-Id: 9d90bf48-44a9-4d20-692e-08da7f548ef5 X-MS-Exchange-CrossTenant-AuthSource: SJ1PR11MB6297.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Aug 2022 06:57:18.2224 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: s6xrSHdU/9R9nRN+rfkp7qUlQjeo4DrLuY7C/j8dsZS2Q3Q6PW98BhbWI8s6BItkicMVQOZq2ycHaOVsEW3pLA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN2PR11MB4565 X-OriginatorOrg: intel.com Precedence: bulk List-ID: X-Mailing-List: linux-ide@vger.kernel.org Hi John, On Fri, Aug 12, 2022 at 03:58:14PM +0100, John Garry wrote: > On 12/08/2022 12:13, John Garry wrote: > > > On Tue, Aug 09, 2022 at 07:55:53AM -0700, Damien Le Moal wrote: > > > > On 2022/08/09 2:58, John Garry wrote: > > > > > On 08/08/2022 15:52, Damien Le Moal wrote: > > > > > > On 2022/08/05 1:05, kernel test robot wrote: > > > > > > > > > > > > > > > > > > > > > Greeting, > > > > > > > > > > > > > > FYI, we noticed a -15.0% regression of > > > > > > > stress-ng.copy-file.ops_per_sec due to commit: > > > > > > > > > > > > > > > > > > > > > commit: 0568e6122574dcc1aded2979cd0245038efe22b6 > > > > > > > ("ata: libata-scsi: cap ata_device->max_sectors > > > > > > > according to shost->max_sectors") > > > > > > > https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git > > > > > > > master > > > > > > > > > > > > > > in testcase: stress-ng > > > > > > > on test machine: 96 threads 2 sockets Ice Lake with 256G memory > > > > > > > with following parameters: > > > > > > > > > > > > > >     nr_threads: 10% > > > > > > >     disk: 1HDD > > > > > > >     testtime: 60s > > > > > > >     fs: f2fs > > > > > > >     class: filesystem > > > > > > >     test: copy-file > > > > > > >     cpufreq_governor: performance > > > > > > >     ucode: 0xb000280 > > > > > > > > > > > > Without knowing what the device adapter is, hard to say > > > > > > where the problem is. I > > > > > > suspect that with the patch applied, we may be ending up > > > > > > with a small default > > > > > > max_sectors value, causing overhead due to more commands > > > > > > than necessary. > > > > > > > > > > > > Will check what I see with my test rig. > > > > > > > > > > As far as I can see, this patch should not make a difference unless the > > > > > ATA shost driver is setting the max_sectors value unnecessarily low. > > > > > > > > That is my hunch too, hence my question about which host driver > > > > is being used > > > > for this test... That is not apparent from the problem report. > > > > > > we noticed the commit is already in mainline now, and in our tests, > > > there is > > > still similar regression and also on other platforms. > > > could you guide us how to check "which host driver is being used for this > > > test"? hope to supply some useful information. > > > > > > > For me, a complete kernel log may help. > > and since only 1HDD, the output of the following would be helpful: > > /sys/block/sda/queue/max_sectors_kb > /sys/block/sda/queue/max_hw_sectors_kb > > And for 5.19, if possible. for commit 0568e61225 ("ata: libata-scsi: cap ata_device->max_sectors according to shost->max_sectors") root@lkp-icl-2sp1 ~# cat /sys/block/sda/queue/max_sectors_kb 512 root@lkp-icl-2sp1 ~# cat /sys/block/sda/queue/max_hw_sectors_kb 512 for both commit 4cbfca5f77 ("scsi: scsi_transport_sas: cap shost opt_sectors according to DMA optimal limit") and v5.19 root@lkp-icl-2sp1 ~# cat /sys/block/sda/queue/max_sectors_kb 1280 root@lkp-icl-2sp1 ~# cat /sys/block/sda/queue/max_hw_sectors_kb 32767 > > Thanks! > > > > > > > > > > > > > From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: multipart/mixed; boundary="===============1539681600038150008==" MIME-Version: 1.0 From: Oliver Sang To: lkp@lists.01.org Subject: Re: [ata] 0568e61225: stress-ng.copy-file.ops_per_sec -15.0% regression Date: Tue, 16 Aug 2022 14:57:07 +0800 Message-ID: In-Reply-To: List-Id: --===============1539681600038150008== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Hi John, On Fri, Aug 12, 2022 at 03:58:14PM +0100, John Garry wrote: > On 12/08/2022 12:13, John Garry wrote: > > > On Tue, Aug 09, 2022 at 07:55:53AM -0700, Damien Le Moal wrote: > > > > On 2022/08/09 2:58, John Garry wrote: > > > > > On 08/08/2022 15:52, Damien Le Moal wrote: > > > > > > On 2022/08/05 1:05, kernel test robot wrote: > > > > > > > = > > > > > > > = > > > > > > > Greeting, > > > > > > > = > > > > > > > FYI, we noticed a -15.0% regression of > > > > > > > stress-ng.copy-file.ops_per_sec due to commit: > > > > > > > = > > > > > > > = > > > > > > > commit: 0568e6122574dcc1aded2979cd0245038efe22b6 > > > > > > > ("ata: libata-scsi: cap ata_device->max_sectors > > > > > > > according to shost->max_sectors") > > > > > > > https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.= git > > > > > > > master > > > > > > > = > > > > > > > in testcase: stress-ng > > > > > > > on test machine: 96 threads 2 sockets Ice Lake with 256G memo= ry > > > > > > > with following parameters: > > > > > > > = > > > > > > > =C2=A0=C2=A0=C2=A0=C2=A0nr_threads: 10% > > > > > > > =C2=A0=C2=A0=C2=A0=C2=A0disk: 1HDD > > > > > > > =C2=A0=C2=A0=C2=A0=C2=A0testtime: 60s > > > > > > > =C2=A0=C2=A0=C2=A0=C2=A0fs: f2fs > > > > > > > =C2=A0=C2=A0=C2=A0=C2=A0class: filesystem > > > > > > > =C2=A0=C2=A0=C2=A0=C2=A0test: copy-file > > > > > > > =C2=A0=C2=A0=C2=A0=C2=A0cpufreq_governor: performance > > > > > > > =C2=A0=C2=A0=C2=A0=C2=A0ucode: 0xb000280 > > > > > > = > > > > > > Without knowing what the device adapter is, hard to say > > > > > > where the problem is. I > > > > > > suspect that with the patch applied, we may be ending up > > > > > > with a small default > > > > > > max_sectors value, causing overhead due to more commands > > > > > > than necessary. > > > > > > = > > > > > > Will check what I see with my test rig. > > > > > = > > > > > As far as I can see, this patch should not make a difference unle= ss the > > > > > ATA shost driver is setting the max_sectors value unnecessarily l= ow. > > > > = > > > > That is my hunch too, hence my question about which host driver > > > > is being used > > > > for this test... That is not apparent from the problem report. > > > = > > > we noticed the commit is already in mainline now, and in our tests, > > > there is > > > still similar regression and also on other platforms. > > > could you guide us how to check "which host driver is being used for = this > > > test"? hope to supply some useful information. > > > = > > = > > For me, a complete kernel log may help. > = > and since only 1HDD, the output of the following would be helpful: > = > /sys/block/sda/queue/max_sectors_kb > /sys/block/sda/queue/max_hw_sectors_kb > = > And for 5.19, if possible. for commit 0568e61225 ("ata: libata-scsi: cap ata_device->max_sectors according to sho= st->max_sectors") root(a)lkp-icl-2sp1 ~# cat /sys/block/sda/queue/max_sectors_kb 512 root(a)lkp-icl-2sp1 ~# cat /sys/block/sda/queue/max_hw_sectors_kb 512 for both commit 4cbfca5f77 ("scsi: scsi_transport_sas: cap shost opt_sectors according to D= MA optimal limit") and v5.19 root(a)lkp-icl-2sp1 ~# cat /sys/block/sda/queue/max_sectors_kb 1280 root(a)lkp-icl-2sp1 ~# cat /sys/block/sda/queue/max_hw_sectors_kb 32767 > = > Thanks! > = > > = > > > > = > > > > > = >=20 --===============1539681600038150008==--