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 22CDEA046B for ; Fri, 28 Jun 2019 21:01:41 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id E1E881B9B1; Fri, 28 Jun 2019 21:01:39 +0200 (CEST) Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by dpdk.org (Postfix) with ESMTP id 994EF1B9AD for ; Fri, 28 Jun 2019 21:01:38 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga101.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 28 Jun 2019 12:01:37 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.63,428,1557212400"; d="scan'208";a="246251736" Received: from fyigit-mobl.ger.corp.intel.com (HELO [10.237.221.30]) ([10.237.221.30]) by orsmga001.jf.intel.com with ESMTP; 28 Jun 2019 12:01:35 -0700 To: =?UTF-8?Q?Mattias_R=c3=b6nnblom?= , dev@dpdk.org, bruce.richardson@intel.com, thomas@monjalon.net Cc: nhorman@tuxdriver.com, stephen@networkplumber.org, david.marchand@redhat.com References: <20190605104400.24484-1-mattias.ronnblom@ericsson.com> <20190628090124.16849-1-mattias.ronnblom@ericsson.com> <20190628090124.16849-4-mattias.ronnblom@ericsson.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: Fri, 28 Jun 2019 20:01:34 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.7.2 MIME-Version: 1.0 In-Reply-To: <20190628090124.16849-4-mattias.ronnblom@ericsson.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Subject: Re: [dpdk-dev] [PATCH v4 3/5] eal: improve entropy for initial PRNG seed 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 6/28/2019 10:01 AM, Mattias Rönnblom wrote: > Replace the use of rte_get_timer_cycles() with getentropy() for > seeding the pseudo-random number generator. getentropy() provides a > more truly random value. > > getentropy() requires glibc 2.25 and Linux kernel 3.17. In case > getentropy() is not found at compile time, or the relevant syscall > fails in runtime, the rdseed machine instruction will be used as a > fallback. > > rdseed is only available on x86 (Broadwell or later). In case it is > not present, rte_get_timer_cycles() will be used as a second fallback. > > On non-Meson builds, getentropy() will not be used. > > Suggested-by: Bruce Richardson > Suggested-by: Stephen Hemminger > Signed-off-by: Mattias Rönnblom > Acked-by: Bruce Richardson <...> > +#ifdef RTE_MACHINE_CPUFLAG_RDSEED > + unsigned int rdseed_rc; > + unsigned long long rdseed_seed; > + > + /* first fallback: rdseed instruction, if available */ > + rdseed_rc = _rdseed64_step(&rdseed_seed); This is causing build error for 32-bit [1] and ICC [2], can you please check? [1] .../dpdk/lib/librte_eal/common/rte_random.c: In function ‘__rte_random_initial_seed’: .../dpdk/lib/librte_eal/common/rte_random.c:196:14: error: implicit declaration of function ‘_rdseed64_step’; did you mean ‘_rdseed32_step’? [-Werror=implicit-function-declaration] 196 | rdseed_rc = _rdseed64_step(&rdseed_seed); | ^~~~~~~~~~~~~~ | _rdseed32_step .../dpdk/lib/librte_eal/common/rte_random.c:196:14: error: nested extern declaration of ‘_rdseed64_step’ [-Werror=nested-externs] [2] Building x86_64-native-linuxapp-icc ... .../dpdk/lib/librte_eal/common/rte_random.c(196): error #167: argument of type "unsigned long long *" is incompatible with parameter of type "unsigned long *" rdseed_rc = _rdseed64_step(&rdseed_seed); ^