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Wed, 3 Nov 2021 12:15:49 +0900 (KST) Received: from epsmtrp2.samsung.com (unknown [182.195.40.14]) by epcas2p3.samsung.com (KnoxPortal) with ESMTPA id 20211103031549epcas2p34418a4e6218ca93da57a0c373691bd41~z6uK3zj6_1556915569epcas2p3O; Wed, 3 Nov 2021 03:15:49 +0000 (GMT) Received: from epsmgms1p1new.samsung.com (unknown [182.195.42.41]) by epsmtrp2.samsung.com (KnoxPortal) with ESMTP id 20211103031549epsmtrp2750aee3639bcadb3bf51dca1abbf291c~z6uK3Ndm72723927239epsmtrp2G; Wed, 3 Nov 2021 03:15:49 +0000 (GMT) X-AuditID: b6c32a46-a25ff70000002722-24-6181fee5c32e Received: from epsmtip1.samsung.com ( [182.195.34.30]) by epsmgms1p1new.samsung.com (Symantec Messaging Gateway) with SMTP id 40.F2.29871.5EEF1816; Wed, 3 Nov 2021 12:15:49 +0900 (KST) Received: from KORCO082417 (unknown [10.229.8.121]) by epsmtip1.samsung.com (KnoxPortal) with ESMTPA id 20211103031549epsmtip16cfe178e36fb59e5d8e5ee3bcc34fddc~z6uK0uCVz0378203782epsmtip1J; Wed, 3 Nov 2021 03:15:49 +0000 (GMT) From: "Chanho Park" To: Cc: , "'Thomas Gleixner'" Subject: hackbench score comparison between 5.10.75-rt47 and 5.14.14-rt21 Date: Wed, 3 Nov 2021 12:15:49 +0900 Message-ID: <009301d7d061$1a1bbeb0$4e533c10$@samsung.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Mailer: Microsoft Outlook 16.0 Thread-Index: AdfQYQ9XY61w41R+Sqy2HitDwXY5Kw== Content-Language: ko X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFvrMKsWRmVeSWpSXmKPExsWy7bCmqe7Tf42JBttOiVtMuziJ2eL0xB5m i82bpjI7MHu8O3eO3ePzJrkApqhsm4zUxJTUIoXUvOT8lMy8dFsl7+B453hTMwNDXUNLC3Ml hbzE3FRbJRefAF23zBygHUoKZYk5pUChgMTiYiV9O5ui/NKSVIWM/OISW6XUgpScAvMCveLE 3OLSvHS9vNQSK0MDAyNToMKE7Ixpk48yFqxir9j9WKWB8T1rFyMnh4SAicSSK2sYuxi5OIQE djBKXDhxngXC+cQosf4eTOYbo8SWprnsMC2fNh1ng0jsBapq+AlV9YJRYvaEdkaQKjYBfYmX HdvAlogIqEhs+HsJLM4s4CpxaEYf2CRhAU+JX+t3s4HYLEA1/68fA7N5BSwl/u/6xAhhC0qc nPmEBaJXXmL72znMEFcoSPx8ugxqvp7Enyn7mSBqRCRmd7ZB1Rxjl/j2VR/CdpHY//ol1AfC Eq+Ob4GypSQ+v9sL9o2EQDejROuj/1CJ1YwSnY0+ELa9xK/pW4CWcQAt0JRYv0sfxJQQUJY4 cgvqND6JjsN/2SHCvBIdbUIQjeoSB7ZPZ4GwZSW653yGBruHxMl7y9knMCrOQvLkLCRPzkLy zCyEvQsYWVYxiqUWFOempxYbFRjB4zo5P3cTIzj1abntYJzy9oPeIUYmDsZDjBIczEoivMxH GxKFeFMSK6tSi/Lji0pzUosPMZoCg30is5Rocj4w+eaVxBuaWBqYmJkZmhuZGpgrifNaimYn CgmkJ5akZqemFqQWwfQxcXBKNTCxut9S8FijfjU76cE+qwLevgPzP7Nz928Ke8iQPjFq9Qu5 6ml2GcHLDKN4d32Jl99T0qVScapE+NgM8dzf7ov4NeWduh1uSIVOX/3riezXI9smHZp6MO3J xCcLY5q7Hq31X/bH/9DhgBKmwzJxvtydB/fvr0j0ubXyCdPb7wJrSvcb34hq/9l+JrlOKtnA W+H8ojWHy4sKC9Zp3/fa+sRG+Vez2RbxOzLavwzvbKoL5p2z/63ZLUfbmSe6UspZ5l9sK7u8 f+Ls18fDt62Wl/i7eaGUNfcPXz++W/FWgpt9z+7bPpPb0jFJte2XuZF/kbT9coU65hev7Bwn H0z1XHcyhIlZ7M2WcxEz1l+pzP2jxFKckWioxVxUnAgAsvMMCwYEAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrKLMWRmVeSWpSXmKPExsWy7bCSnO7Tf42JBh8nClpMuziJ2eL0xB5m i82bpjI7MHu8O3eO3ePzJrkApigum5TUnMyy1CJ9uwSujGmTjzIWrGKv2P1YpYHxPWsXIyeH hICJxKdNx9m6GLk4hAR2M0qs/vuADSIhK/Hs3Q52CFtY4n7LEVaIomeMEl92nmYBSbAJ6Eu8 7NgGNklEQEViw99LjCA2s4C7xKOvf8GahQU8JX6t3w02lAWo5v/1Y2A2r4ClxP9dnxghbEGJ kzOfAM3kAOrVk2jbCDVGXmL72znMEDcoSPx8ugxqlZ7Enyn7mSBqRCRmd7YxT2AUnIVk0iyE SbOQTJqFpGMBI8sqRsnUguLc9NxiwwLDvNRyveLE3OLSvHS95PzcTYzgkNbS3MG4fdUHvUOM TByMhxglOJiVRHiZjzYkCvGmJFZWpRblxxeV5qQWH2KU5mBREue90HUyXkggPbEkNTs1tSC1 CCbLxMEp1cAUm3Lt3x6/s7v/rb/E+SDu7LvZx35GnisVs74rHPG8VlorlbXUrzcpW691k/rk 6AlntqhJNFjv4Bdp/ZR/p/E+p9XbM7M2rsuJ4vs/Tc1EZsOP1Ot7Uz4JLf8/+9vsB+wh/i/P XHa3jXtrtultWsq62YJi8jOM9LYevNzQYnPsovHMZW4rrnl8Kj/0Rd1etUPmttX/dknXvTNe 3QxeErr6cbzV5PCn0e+ZYxZ4hm0NPSL8Y6Xu3olf1ma7H1hkae24196NZ/2943b77k0Unr4/ ++CfKSt2zxLcucR3frXWCcE/u+77/LkgrrKl3oVTbGtfQY7QHNPYV857z0docU7/05Oz+JH1 r+JVu9TXsNxj5VViKc5INNRiLipOBAAnQaab2AIAAA== X-CMS-MailID: 20211103031549epcas2p34418a4e6218ca93da57a0c373691bd41 X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-Sendblock-Type: AUTO_CONFIDENTIAL CMS-TYPE: 102P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20211103031549epcas2p34418a4e6218ca93da57a0c373691bd41 References: Precedence: bulk List-ID: X-Mailing-List: linux-rt-users@vger.kernel.org Dear RT folks, I found an uncomprehended value of hackbench while I tested preempt rt patches on my ARM64(Cortex A76 x 8) target. So, I decided to check it on QEMU x86_64 KVM with yocto. I executed both images with below command. $ runqemu qemux86-64 kvm nographic qemuparams="-smp cores=4" I was able to get similar score values with my arm64 target. It was half than 5.10.75 kernel like below. Any idea about this? Actually, I'm not sure it could be a regression or not. <5.10.75-rt47> root@qemux86-64:~# hackbench -l 10000 Running in process mode with 10 groups using 40 file descriptors each (== 400 tasks) Each sender will pass 10000 messages of 100 bytes Time: 49.898 <5.14.14-rt21> root@qemux86-64:~# hackbench -l 10000 Running in process mode with 10 groups using 40 file descriptors each (== 400 tasks) Each sender will pass 10000 messages of 100 bytes Time: 96.973 Best Regards, Chanho Park