Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
IronPort-SDR: ZEd+sO1nY0izNFE+I1GIaHMIw5BWFnYAFns/3IPJzN2R6VNhtZVxYSEVicx/9higxxXdTldmho
 kuf4w9yw0NWp2n7D6bqHbqUL/PEGRrlTafRb3irQvAj2sMlguTeejW7oLAmxzJQaR9R9+6/lNy
 y3Oe7fiCm3ZB//WtBJOVNdwfWRswvmVvMbs3O/rfbijjnTyC1eTDP4M4xQS41iUm9LoQHrk+PA
 Pws3HHkWtIivdiZgAzRNapEpz6gIPht7nEQhSI6zTExJlkKfJ2JcpJq+h0Hw9/y8IPYhSvZaDP
 ZkhYhinOKQ7vJB8QMEFle5om
IronPort-SDR: pt/LLsHka0IwGQtL1C+/AREPQD011icEwc9B/oG1FHWSQNGBJMIe+bhfgOi6dqZ48zVe7kqH90
 6H+XPD0XwpmhV7zZFXJGNljMyCiLffdw5H/cT1w6ne+/lY+l11Gakp35fGWJ0iCWaqUo6iBeeM
 d7ohz6Vr2tFDkocL+hN0hYXlKGwoJ9sOuBXYJWJx9dMU02MTmje+4r4azVeEUnPOiHo/HIux7k
 9soyUD4bWuV5NWi8tOgKbjm6OL3AQJwBUn+mQ0cFAIaH++EEOzq1sx/RcoyA28mgrYLoC3xQz2
 zPU=
WDCIronportException: Internal
Message-ID: <05b55329-6e55-c3ff-0c41-5254a5625473@opensource.wdc.com>
Date:   Sat, 20 Aug 2022 09:36:44 -0700
MIME-Version: 1.0
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:91.0)
 Gecko/20100101 Thunderbird/91.12.0
Subject: Re: [ata] 0568e61225: stress-ng.copy-file.ops_per_sec -15.0%
 regression
Content-Language: en-US
To:     Oliver Sang <oliver.sang@intel.com>,
        John Garry <john.garry@huawei.com>
Cc:     Christoph Hellwig <hch@lst.de>,
        "Martin K. Petersen" <martin.petersen@oracle.com>,
        LKML <linux-kernel@vger.kernel.org>,
        Linux Memory Management List <linux-mm@kvack.org>,
        linux-ide@vger.kernel.org, lkp@lists.01.org, lkp@intel.com,
        ying.huang@intel.com, feng.tang@intel.com,
        zhengjun.xing@linux.intel.com, fengwei.yin@intel.com
References: <2e9cf5a6-c043-5ccf-e363-097c6c941891@huawei.com>
 <f1c3d717-339d-ba2b-9775-fc0e00f57ae3@huawei.com>
 <Yvs/w93KUkgD9f7/@xsang-OptiPlex-9020>
 <aabf7ed8-8d4d-dc68-1b8b-c91653701def@huawei.com>
 <43eaa104-5b09-072c-56aa-6289569b0015@opensource.wdc.com>
 <28d6e48b-f52f-9467-8260-262504a1a1ff@huawei.com>
 <YvzyZJUblfqN6Xj3@xsang-OptiPlex-9020>
 <743867a6-b266-58e4-a8a6-542757916f0a@huawei.com>
 <Yv2euLFLjl8bEaeI@xsang-OptiPlex-9020>
 <d1b1d434-059d-4d76-5fc6-092ab9ba6e16@huawei.com>
 <Yv8sg3J8PLD56osY@xsang-OptiPlex-9020>
From:   Damien Le Moal <damien.lemoal@opensource.wdc.com>
Organization: Western Digital Research
In-Reply-To: <Yv8sg3J8PLD56osY@xsang-OptiPlex-9020>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit
Precedence: bulk

On 2022/08/18 23:24, Oliver Sang wrote:
> On Thu, Aug 18, 2022 at 10:28:30AM +0100, John Garry wrote:
>> On 18/08/2022 03:06, Oliver Sang wrote:
>>
>> Hi Oliver,
>>
>>>>> did I do the right thing?
>>>> Sorry but I was not really interested in 4cbfca5f77 and I see where that
>>>> build error is coming, but don't be concerned with it. However, for
>>>> avoidance of doubt, if you have results for vanilla v6.0-rc1 then that would
>>>> be appreciated.
>>> for v6.0-rc1, it's still 512/512
>>>
>>>> I will also send a separate patch for testing if you don't mind.
>>> sure! we are very glad that we could help.
>>
>> As you probably saw, I sent "[RFT PATCH] ata: libata: Set __ATA_BASE_SHT
>> max_sectors" for testing on top of v6.0-rc1, and I hope that then we can get
>> same performance as v5.19
> 
> yeah, our test confirmed your expectation:
> 
> stress-ng.copy-file.ops_per_sec
> v5.19                 - 26.85
> v6.0-rc1              - 23.03
> v6.0-rc1 + your patch - 26.94

Thanks for testing Oliver. I pushed the fix and sent it out as an rc2 fix.

> 
>>
>> Thanks,
>> John


-- 
Damien Le Moal
Western Digital Research