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Tue, 19 Jan 2021 13:07:01 +0000 (GMT) X-AuditID: cbfec7f5-c77ff7000000b1b0-a3-6006d975113d Received: from eusmtip1.samsung.com ( [203.254.199.221]) by eusmgms1.samsung.com (EUCPMTA) with SMTP id BF.34.21957.479D6006; Tue, 19 Jan 2021 13:07:01 +0000 (GMT) Received: from [106.210.134.142] (unknown [106.210.134.142]) by eusmtip1.samsung.com (KnoxPortal) with ESMTPA id 20210119130700eusmtip1a83e54412005acd1e00aa27d2a2e423b~bpAIVbKZY1029210292eusmtip1S; Tue, 19 Jan 2021 13:07:00 +0000 (GMT) To: David Marchand Cc: dev , Aaron Conole , ci@dpdk.org, Lincoln Lavoie From: Lukasz Wojciechowski Message-ID: <0a27bf29-8baa-1fcd-837c-acebb155cdf0@partner.samsung.com> Date: Tue, 19 Jan 2021 14:06:57 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.6.1 MIME-Version: 1.0 In-Reply-To: Content-Transfer-Encoding: 8bit Content-Language: en-US X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFupileLIzCtJLcpLzFFi42LZduzned3Sm2wJBs0f5C1+vXnAbvFu3ktm i+0rutgs3n3azmTRvGgdiwOrx68FS1k99i+eweLxft9VtgDmKC6blNSczLLUIn27BK6MJUd+ sRcc4a1o6/7J0sDYxd3FyMkhIWAisfz3C/YuRi4OIYEVjBJb7t5ng3C+ADmL3zFBOJ8ZJc62 AjVBtdxfNhuqajmjxIJ7t5khnI9AVQffg1UJC1hLfJqzhhXEFhHQk5i4bRNLFyMHB7NAvsS1 rzkgYTYBW4kjM7+ClfAKuEm8OdTKDGKzCKhK3G6dBRYXFUiSuHvnMBNEjaDEyZlPWEBsToFA iQ+/noPVMwvISzRvnQ1li0vcejIf7GoJgQMcEqs3r2QF2Ssh4CLx75QNxAPCEq+Ob2GHsGUk /u+Eqd/GKHH1909GCGc/o8T13hVQVdYSh//9ZoN4QFNi/S59iLCjxKzVj5kh5vNJ3HgrCHED n8SkbdOhwrwSHW1CENV6Ek97pjLCrP2z9gnLBEalWUg+m4Xkm1lIvpmFsHcBI8sqRvHU0uLc 9NRi47zUcr3ixNzi0rx0veT83E2MwORy+t/xrzsYV7z6qHeIkYmD8RCjBAezkghv6TqmBCHe lMTKqtSi/Pii0pzU4kOM0hwsSuK8u7auiRcSSE8sSc1OTS1ILYLJMnFwSjUw8VY0Prr4Psr9 7f0Lc31vmHS8XT6F7YhyRFRA/1Gd7jlBG+McXy60tmk35vq7gLXlQUN10ASNet/Tx08sPy15 4d3yENeJc8/pKVdWLqrUsNuqPcF0vsvcr9ZH2AI6Jee+ub9FOr+9ddPEW5617yU2PjR/sdOi bfrhimSxJSvXZYS8P6jJN8NbJqQu+bb74lPPRDl3P/66kNn1f8oXi9C1e4uNrX2e9pk3Ncxb vGPv/O2luyN/7dn9PuCezyG+1U5LP8cYpqsxvZmw9PaNi099OBwiv0akOLt4afS9YOys+3b7 lbq5ilhnE6vRh21/jnz8vzFX3EuDz9H1YXM8v6v6cjGREpmVjdMKfs83LmpVVGIpzkg01GIu Kk4EAEAKTH2dAwAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprLIsWRmVeSWpSXmKPExsVy+t/xu7qlN9kSDH7cYbL49eYBu8W7eS+Z Lbav6GKzePdpO5NF86J1LA6sHr8WLGX12L94BovH+31X2QKYo/RsivJLS1IVMvKLS2yVog0t jPQMLS30jEws9QyNzWOtjEyV9O1sUlJzMstSi/TtEvQylhz5xV5whLeirfsnSwNjF3cXIyeH hICJxP1ls9m6GLk4hASWMko0Hj3I1MXIAZSQkfhwSQCiRljiz7UuqJr3jBJP+vexgySEBawl Ps1ZwwpiiwjoSUzctokFxGYWyJd4/72DCaLhPqPEhP/tjCAJNgFbiSMzv4I18Aq4Sbw51MoM YrMIqErcbp0FFhcVSJI4MesTM0SNoMTJmU/AhnIKBEp8+PWcGWKBmcS8zQ+hbHmJ5q2zoWxx iVtP5jNNYBSahaR9FpKWWUhaZiFpWcDIsopRJLW0ODc9t9hQrzgxt7g0L10vOT93EyMwnrYd +7l5B+O8Vx/1DjEycTAeYpTgYFYS4S1dx5QgxJuSWFmVWpQfX1Sak1p8iNEU6J+JzFKiyfnA iM4riTc0MzA1NDGzNDC1NDNWEufdOndNvJBAemJJanZqakFqEUwfEwenVAOTp19229W0ZB4j pein6ZPS5vnabzxhJfAjiJP/xaq5Z2Zu9dEx3Lvs++KX+1u3a/jdz191+sP3pCSm8w8/fGQo TOetVvjJ2rUhbHf4NOalJi8WcolONpol5/GrZVHXzbSwlqWzLk+1FOUo/m70sVAx634Ip//5 BbubOjOl7VL+NFUG7F8vevzP4cJKbwGF+At9r0v+xX4OKM/oD5Z7U6whsn9Rxubla9Sa3/mf uVrps+6pZNXNaOmsxxMPt9xN3nTxnDjbRjHFbZ3HNBZtXzHxnPKxiFTeD3osoenTajpCApQ0 UucL3c05IBp1N+Fy7Iwou6nLTG5GyB85O7/3Hbelm/yixde1uw9sL8+32dKlxFKckWioxVxU nAgAGC3vzzADAAA= X-CMS-MailID: 20210119130701eucas1p15d95e6d3bc57fbf84d7168125c02346c X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-RootMTR: 20210119035920eucas1p15da5a04b73d19e63287dc14905d765f2 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20210119035920eucas1p15da5a04b73d19e63287dc14905d765f2 References: <20210119035910.8324-1-l.wojciechow@partner.samsung.com> Subject: Re: [dpdk-ci] [dpdk-dev] [PATCH v1 0/1] distributor test fix X-BeenThere: ci@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK CI discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: ci-bounces@dpdk.org Sender: "ci" Thank you David, If you have the possibility you can try on some emulated virtual machine, where cores are much slower, so the workers don't return packages immediately. It reproduces in 100% cases in such environment. Best regards Lukasz W dniu 19.01.2021 o 09:44, David Marchand pisze: > On Tue, Jan 19, 2021 at 4:59 AM Lukasz Wojciechowski > wrote: >> According to the discussion in this thread: >> https://protect2.fireeye.com/v1/url?k=24ecce33-7b77f77c-24ed457c-0cc47a30 >> d446-e317a6beb8cfa273&q=1&e=f8bb12df-3698-4bce-a7b7-d72e22b91431&u=https% >> 3A%2F%2Finbox.dpdk.org%2Fdev%2FCAOE1vsOehF4ZMOWffpEv%3DQF6YOc5wXtg23PV83B >> 9CLiTMn8wQA%40mail.gmail.com%2F%23r >> >> I was able to reproduce the distributor test failure in the exactly same >> way as described, but on x86_64 machine with 32 cores. >> So it does not seem to be the problem related to the ARM architecture. >> IMO issue occurs when there are many worker threads returning at the same >> time packets. >> >> I was not able to observe the issue on ARM devices, but I used only >> machines with 4 cores. So that is max 3 worker cores, >> so maximum of 32*3 = 96 packets processed at the same time >> which is less than 127 , so the issue cannot occur. >> >> Can anyone verify this patch on a machine similar to one used in CI lab, >> on which the issue occurred? > Thanks for looking at it, Lukasz. > Unfortunately, I can't reproduce it on my x86 system (26 workers in > the test) and I don't have a ARM machine. > -- Lukasz Wojciechowski Principal Software Engineer Samsung R&D Institute Poland Samsung Electronics Office +48 22 377 88 25 l.wojciechow@partner.samsung.com