From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 8DE40A0471 for ; Mon, 15 Jul 2019 16:54:04 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id A0CEB4CE4; Mon, 15 Jul 2019 16:54:02 +0200 (CEST) Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by dpdk.org (Postfix) with ESMTP id D75F92C6A; Mon, 15 Jul 2019 16:53:59 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 15 Jul 2019 07:53:59 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.63,493,1557212400"; d="scan'208";a="169631975" Received: from fyigit-mobl.ger.corp.intel.com (HELO [10.237.221.10]) ([10.237.221.10]) by orsmga003.jf.intel.com with ESMTP; 15 Jul 2019 07:53:56 -0700 To: "A.McLoughlin" , Wenzhuo Lu , Jingjing Wu , Bernard Iremonger Cc: dev@dpdk.org, david.marchand@redhat.com, stable@dpdk.org, Andrew Rybchenko , Thomas Monjalon , Stephen Hemminger References: <20190712083221.4987-1-aideen.mcloughlin@intel.com> From: Ferruh Yigit Openpgp: preference=signencrypt Autocrypt: addr=ferruh.yigit@intel.com; prefer-encrypt=mutual; keydata= mQINBFXZCFABEADCujshBOAaqPZpwShdkzkyGpJ15lmxiSr3jVMqOtQS/sB3FYLT0/d3+bvy qbL9YnlbPyRvZfnP3pXiKwkRoR1RJwEo2BOf6hxdzTmLRtGtwWzI9MwrUPj6n/ldiD58VAGQ +iR1I/z9UBUN/ZMksElA2D7Jgg7vZ78iKwNnd+vLBD6I61kVrZ45Vjo3r+pPOByUBXOUlxp9 GWEKKIrJ4eogqkVNSixN16VYK7xR+5OUkBYUO+sE6etSxCr7BahMPKxH+XPlZZjKrxciaWQb +dElz3Ab4Opl+ZT/bK2huX+W+NJBEBVzjTkhjSTjcyRdxvS1gwWRuXqAml/sh+KQjPV1PPHF YK5LcqLkle+OKTCa82OvUb7cr+ALxATIZXQkgmn+zFT8UzSS3aiBBohg3BtbTIWy51jNlYdy ezUZ4UxKSsFuUTPt+JjHQBvF7WKbmNGS3fCid5Iag4tWOfZoqiCNzxApkVugltxoc6rG2TyX CmI2rP0mQ0GOsGXA3+3c1MCdQFzdIn/5tLBZyKy4F54UFo35eOX8/g7OaE+xrgY/4bZjpxC1 1pd66AAtKb3aNXpHvIfkVV6NYloo52H+FUE5ZDPNCGD0/btFGPWmWRmkPybzColTy7fmPaGz cBcEEqHK4T0aY4UJmE7Ylvg255Kz7s6wGZe6IR3N0cKNv++O7QARAQABtCVGZXJydWggWWln aXQgPGZlcnJ1aC55aWdpdEBpbnRlbC5jb20+iQJUBBMBCgA+AhsDAh4BAheABQkI71rKFiEE 0jZTh0IuwoTjmYHH+TPrQ98TYR8FAlznMMQFCwkIBwMFFQoJCAsFFgIDAQAACgkQ+TPrQ98T YR/B9Q//a57esjq996nfZVm7AsUl7zbvhN+Ojity25ib2gcSVVsAN2j6lcQS4hf6/OVvRj3q CgebJ4o2gXR6X12UzWBJL7NE8Xpc70MvUIe0r11ykurQ9n9jUaWMjxdSqBPF93hU+Z/MZe5M 1rW5O2VJLuTJzkDw3EYUCbHOwPjeaS8Qqj3RI0LYbGthbHBIp9CsjkgsJSjTT5GQ8AQWkE7I z+hvPx6f1rllfjxFyi4DI3jLhAI+j1Nm+l+ESyoX59HrLTHAvq4RPkLpTnGBj9gOnJ+5sVEr GE0fcffsNcuMSkpqSEoJCPAHmChoLgezskhhsy0BiU3xlSIj1Dx2XMDerUXFOK3ftlbYNRte HQy4EKubfZRB8H5Rvcpksom3fRBDcJT8zw+PTH14htRApU9f8I/RamQ7Ujks7KuaB7JX5QaG gMjfPzHGYX9PfF6KIchaFmAWLytIP1t0ht8LpJkjtvUCSQZ2VxpCXwKyUzPDIF3co3tp90o7 X07uiC5ymX0K0+Owqs6zeslLY6DMxNdt8ye+h1TVkSZ5g4dCs4C/aiEF230+luL1CnejOv/K /s1iSbXQzJNM7be3FlRUz4FdwsfKiJJF7xYALSBnSvEB04R7I2P2V9Zpudkq6DRT6HZjBeJ1 pBF2J655cdoenPBIeimjnnh4K7YZBzwOLJf2c6u76fe5Ag0EV9ZMvgEQAKc0Db17xNqtSwEv mfp4tkddwW9XA0tWWKtY4KUdd/jijYqc3fDD54ESYpV8QWj0xK4YM0dLxnDU2IYxjEshSB1T qAatVWz9WtBYvzalsyTqMKP3w34FciuL7orXP4AibPtrHuIXWQOBECcVZTTOdZYGAzaYzxiA ONzF9eTiwIqe9/oaOjTwTLnOarHt16QApTYQSnxDUQljeNvKYt1lZE/gAUUxNLWsYyTT+22/ vU0GDUahsJxs1+f1yEr+OGrFiEAmqrzpF0lCS3f/3HVTU6rS9cK3glVUeaTF4+1SK5ZNO35p iVQCwphmxa+dwTG/DvvHYCtgOZorTJ+OHfvCnSVjsM4kcXGjJPy3JZmUtyL9UxEbYlrffGPQ I3gLXIGD5AN5XdAXFCjjaID/KR1c9RHd7Oaw0Pdcq9UtMLgM1vdX8RlDuMGPrj5sQrRVbgYH fVU/TQCk1C9KhzOwg4Ap2T3tE1umY/DqrXQgsgH71PXFucVjOyHMYXXugLT8YQ0gcBPHy9mZ qw5mgOI5lCl6d4uCcUT0l/OEtPG/rA1lxz8ctdFBVOQOxCvwRG2QCgcJ/UTn5vlivul+cThi 6ERPvjqjblLncQtRg8izj2qgmwQkvfj+h7Ex88bI8iWtu5+I3K3LmNz/UxHBSWEmUnkg4fJl Rr7oItHsZ0ia6wWQ8lQnABEBAAGJAjwEGAEKACYCGwwWIQTSNlOHQi7ChOOZgcf5M+tD3xNh HwUCXOcvZgUJBvIWKAAKCRD5M+tD3xNhHxhBD/9toXMIaPIVFd9w1nKsRDM1GE6gZe4jie8q MJpeHB9O+936fSXA0W2X0het60wJQQ45O8TpTcxpc9nGzcE4MTaLAI3E8TjIXAO0cPqUNLyp g0DXezmTw5BU+SKZ51+jSKOtFmzJCHOJZQaMeCHD+G3CrdUHQVQBb5AeuH3KFv9ltgDcWsc8 YO70o3+tGHwcEnyXLdrI0q05wV7ncnLdkgVo+VUN4092bNMPwYly1TZWcU3Jw5gczOUEfTY7 sgo6E/sGX3B+FzgIs5t4yi1XOweCAQ/mPnb6uFeNENEFyGKyMG1HtjwBqnftbiFO3qitEIUY xWGQH23oKscv7i9lT0gg2D+ktzZhVWwHJVY/2vWSB9aCSWChcH2BT+lWrkwSpoPhy+almM84 Qz2wF72/d4ce4L27pSrS+vOXtXHLGOOGcAn8yr9TV0kM4aR+NbGBRXGKhG6w4lY54uNd9IBa ARIPUhij5JSygxZCBaJKo+X64AHGkk5bXq+f0anwAMNuJXbYC/lz4DEdKmPgQGShOWNs1Y1a N3cI87Hun/RBVwQ0a3Tr1g6OWJ6xK8cYbMcoR8NZ7L9ALMeJeuUDQR39+fEeHg/6sQN0P0mv 0sL+//BAJphCzDk8ztbrFw+JaPtgzZpRSM6JhxnY+YMAsatJRXA0WSpYP5zzl7yu/GZJIgsv VQ== Message-ID: Date: Mon, 15 Jul 2019 15:53:55 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <20190712083221.4987-1-aideen.mcloughlin@intel.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Subject: Re: [dpdk-dev] [PATCH] app/testpmd: fix doubling of 'total TX dropped' X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" On 7/12/2019 9:32 AM, A.McLoughlin wrote: > The 'Accumulated forward statistics for all ports' incorrectly displayed > double the actual value for 'total_tx_dropped'. This was because 2 > lines in the same function both incremented total_tx_dropped every time > a packet was dropped. I removed one of these lines to fix this issue. > > Fixes: 53324971a14e ("app/testpmd: display/clear forwarding stats on demand") > Cc: david.marchand@redhat.com > Cc: stable@dpdk.org > > Signed-off-by: A.McLoughlin > --- > app/test-pmd/testpmd.c | 1 - > 1 file changed, 1 deletion(-) > > diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c > index 3ed3523b7..c41bada50 100644 > --- a/app/test-pmd/testpmd.c > +++ b/app/test-pmd/testpmd.c > @@ -1555,7 +1555,6 @@ fwd_stats_display(void) > total_recv += stats.ipackets; > total_xmit += stats.opackets; > total_rx_dropped += stats.imissed; > - total_tx_dropped += ports_stats[pt_id].tx_dropped; > total_tx_dropped += stats.oerrors; > total_rx_nombuf += stats.rx_nombuf; > > Hi Aideen, Indeed 'rte_eth_stats->oerrors' and 'tx_dropped' are different values, in testpmd, 'TX-total' is taken as "total_xmit + total_tx_dropped", from this description it may be fair to say "total_tx_dropped = oerrors + tx_dropped" This is easier to see in HW devices, 'oerrors' is the packets sent to HW but HW reported failure for some reason, so these packets not transmitted to the medium. 'tx_dropped' is mostly calculated by application, driver returns packets that can't able to sent to HW, so application can re-try to send or free them and increase 'tx_dropped' counter. The problem is in the virtual drivers, the packets not able to sent are calculated as 'oerrors' and tx_burst functions returns the number of the successfully sent packets which cause application calculate remaining ones as 'tx_dropped' which cause the duplication. In virtual drivers we need to give a decision, if free the wrong packets and increase the 'oerrors' or return packets backs to application without increasing the 'oerrors', so that application can try to do something with packets or free them increasing 'tx_dropped'. @David, @Andrew, do you have a suggestion?