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{ "id": 53483, "url": "http://patches.dpdk.org/api/covers/53483/?format=api", "web_url": "http://patches.dpdk.org/project/dpdk/cover/20190516175510.27154-1-mattias.ronnblom@ericsson.com/", "project": { "id": 1, "url": "http://patches.dpdk.org/api/projects/1/?format=api", "name": "DPDK", "link_name": "dpdk", "list_id": "dev.dpdk.org", "list_email": "dev@dpdk.org", "web_url": "http://core.dpdk.org", "scm_url": "git://dpdk.org/dpdk", "webscm_url": "http://git.dpdk.org/dpdk", "list_archive_url": "https://inbox.dpdk.org/dev", "list_archive_url_format": "https://inbox.dpdk.org/dev/{}", "commit_url_format": "" }, "msgid": "<20190516175510.27154-1-mattias.ronnblom@ericsson.com>", "list_archive_url": "https://inbox.dpdk.org/dev/20190516175510.27154-1-mattias.ronnblom@ericsson.com", "date": "2019-05-16T17:55:04", "name": "[v2,0/6] Pseudo-random number generation improvements", "submitter": { "id": 1077, "url": "http://patches.dpdk.org/api/people/1077/?format=api", "name": "Mattias Rönnblom", "email": "mattias.ronnblom@ericsson.com" }, "mbox": "http://patches.dpdk.org/project/dpdk/cover/20190516175510.27154-1-mattias.ronnblom@ericsson.com/mbox/", "series": [ { "id": 4698, "url": "http://patches.dpdk.org/api/series/4698/?format=api", "web_url": "http://patches.dpdk.org/project/dpdk/list/?series=4698", "date": "2019-05-16T17:55:04", "name": "Pseudo-random number generation improvements", "version": 2, "mbox": "http://patches.dpdk.org/series/4698/mbox/" } ], "comments": "http://patches.dpdk.org/api/covers/53483/comments/", "headers": { "Return-Path": "<dev-bounces@dpdk.org>", "X-Original-To": "patchwork@dpdk.org", "Delivered-To": "patchwork@dpdk.org", "Received": [ "from [92.243.14.124] (localhost [127.0.0.1])\n\tby dpdk.org (Postfix) with ESMTP id D0DD65B38;\n\tThu, 16 May 2019 19:55:20 +0200 (CEST)", "from sessmg22.ericsson.net (sessmg22.ericsson.net [193.180.251.58])\n\tby dpdk.org (Postfix) with ESMTP id DBFEE4CAB\n\tfor <dev@dpdk.org>; Thu, 16 May 2019 19:55:18 +0200 (CEST)", "from ESESBMB504.ericsson.se (Unknown_Domain [153.88.183.117])\n\tby sessmg22.ericsson.net (Symantec Mail Security) with SMTP id\n\t2D.CB.06303.604ADDC5; Thu, 16 May 2019 19:55:18 +0200 (CEST)", "from ESESSMR502.ericsson.se (153.88.183.110) by\n\tESESBMB504.ericsson.se (153.88.183.187) with Microsoft SMTP Server\n\t(version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id\n\t15.1.1713.5; Thu, 16 May 2019 19:55:18 +0200", "from ESESBMB503.ericsson.se (153.88.183.170) by\n\tESESSMR502.ericsson.se (153.88.183.110) with Microsoft SMTP Server\n\t(version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id\n\t15.1.1713.5; Thu, 16 May 2019 19:55:18 +0200", "from selio1a020.lmera.ericsson.se (153.88.183.153) by\n\tsmtp.internal.ericsson.com (153.88.183.186) with Microsoft SMTP\n\tServer id\n\t15.1.1713.5 via Frontend Transport; Thu, 16 May 2019 19:55:17 +0200", "from breslau.lmera.ericsson.se (breslau.lmera.ericsson.se\n\t[150.132.109.241])\n\tby selio1a020.lmera.ericsson.se (8.15.1+Sun/8.15.1) with ESMTP id\n\tx4GHtHcs023701; Thu, 16 May 2019 19:55:17 +0200 (CEST)" ], "DKIM-Signature": "v=1; a=rsa-sha256; d=ericsson.com; s=mailgw201801;\n\tc=relaxed/relaxed; \n\tq=dns/txt; i=@ericsson.com; t=1558029318; x=1560621318;\n\th=From:Sender:Reply-To:Subject:Date:Message-ID:To:CC:MIME-Version:Content-Type:\n\tContent-Transfer-Encoding:Content-ID:Content-Description:Resent-Date:Resent-From:\n\tResent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Id:\n\tList-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive;\n\tbh=eWb5Z1WyqMZGKMfN8JzQcWtCkFauww7qeNk/ZXXUWpE=;\n\tb=Tfx7j+Pj4ZsGtqW/iR/3phJXEAfmEX3AMUZC3+gOh0EK33xL2LS8wXrol6qbR0oO\n\ts50FOwKrvpEUxf3bR9kSKlJnKcbMWOq3IIK0coqj10azLw63EItLRBpXQ8/ReMGv\n\tu8d/lZyupJR1q7E93Iwr3qrfhR+2bv1LPUeAV/mp14Y=;", "X-AuditID": "c1b4fb3a-709ff7000000189f-dc-5cdda406a88e", "From": "=?utf-8?q?Mattias_R=C3=B6nnblom?= <mattias.ronnblom@ericsson.com>", "To": "<dev@dpdk.org>", "CC": "<bruce.richardson@intel.com>, <stephen@networkplumber.org>,\n\t=?utf-8?q?Mattias_R=C3=B6nnblom?= <mattias.ronnblom@ericsson.com>", "Date": "Thu, 16 May 2019 19:55:04 +0200", "Message-ID": "<20190516175510.27154-1-mattias.ronnblom@ericsson.com>", "X-Mailer": "git-send-email 2.17.1", "In-Reply-To": "<20190514092046.30808-1-mattias.ronnblom@ericsson.com>", "References": "<20190514092046.30808-1-mattias.ronnblom@ericsson.com>", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=\"UTF-8\"", "Content-Transfer-Encoding": "8bit", "X-Brightmail-Tracker": "H4sIAAAAAAAAA+NgFnrCLMWRmVeSWpSXmKPExsUyM2J7qS7bkrsxBo3LJC1urLK3ePdpO5PF\n\t4jtyDswevxYsZfVYvOclk0fPyXlMAcxRXDYpqTmZZalF+nYJXBnPtzWzFiwRrfj47QRLA+NO\n\tgS5GDg4JAROJFf+4uhi5OIQEjjJKTJ++mwnC+cYo8WZTJ4Lz//MsNgjnIqPEuznzoZzLjBJb\n\t925h6WLk5GAT8JSY/K4bzBYREJJY+vEyO0gRs0Aro8SOh42sIAlhAReJX6v7mEFsFgFViQO/\n\t2tlAbF4BJ4kr8x+CNUsIyEus3nAArIZTwFli0pRb7CC2EFDN58N9rBD1ghInZz4Bq2cW0JRo\n\t3f6bHcKWl2jeOpsZol5L4v6SL8wTGIVnIWmZhaRlFpKWBYzMqxhFi1OLi3PTjYz0Uosyk4uL\n\t8/P08lJLNjECw/7glt9WOxgPPnc8xCjAwajEwxs7526MEGtiWXFl7iFGCQ5mJRHeDe9vxwjx\n\tpiRWVqUW5ccXleakFh9ilOZgURLnjV69J0ZIID2xJDU7NbUgtQgmy8TBKdXAmOagrza/njXj\n\t7U7DJQm/GrLSrp5obQkzZ8xYOO/dpHrjxR6Llpu+3b80VHP2a8uip0surzKzio69WuUe86NP\n\t8u+9tCsGcXGRp92DVvKeEP7PmXjwtabd1b9bJO7u+JTxa6l2yrprjc2Tri9bu9q2+uyaHe19\n\tLId5L6bo1f32FVz5nq/k21uBWCWW4oxEQy3mouJEANNWlzd3AgAA", "Subject": "[dpdk-dev] [PATCH v2 0/6] Pseudo-random number generation\n\timprovements", "X-BeenThere": "dev@dpdk.org", "X-Mailman-Version": "2.1.15", "Precedence": "list", "List-Id": "DPDK patches and discussions <dev.dpdk.org>", "List-Unsubscribe": "<https://mails.dpdk.org/options/dev>,\n\t<mailto:dev-request@dpdk.org?subject=unsubscribe>", "List-Archive": "<http://mails.dpdk.org/archives/dev/>", "List-Post": "<mailto:dev@dpdk.org>", "List-Help": "<mailto:dev-request@dpdk.org?subject=help>", "List-Subscribe": "<https://mails.dpdk.org/listinfo/dev>,\n\t<mailto:dev-request@dpdk.org?subject=subscribe>", "Errors-To": "dev-bounces@dpdk.org", "Sender": "\"dev\" <dev-bounces@dpdk.org>" }, "content": "Make DPDK pseudo-random number generation multi-thread safe, go faster\nand produce better-quality pseudo-random numbers.\n\nThis patchset requires the yet-to-be-merged rdseed build detection\npatch for rdseed support to be enabled.\nhttp://patchwork.dpdk.org/patch/53404/\n\nThanks to Stephen Hemminger, Bruce Richardson, Keith Wiles and Neil\nHorman for valuable feedback.\n\nPATCH v2:\n* Introduce the x86 rdseed machine instruction as a first fallback, in case\n getentropy() is unavailable\n* Use meson to detect getentropy() and rdseed\n\nPATCH v1:\n* Added performance tests\n* Added __experimental to rte_rand_max() declaration\n* Introduced a PRNG section in the MAINTAINERS file\n* Added missing <rte_memory.h> include\n* Use getentropy() instead of rdtsc for seeding the internal LCG\n\nRFC v3:\n* Since rte_rand() and rte_srand() have been a part of the API since long,\n the experimental attribute was removed and the symbols were moved out\n of the experimental section of the version.map file.\n* rte_rand_max() performance improvements:\n * Avoid repeated rte_lcore_id() calls.\n * Handle a power-of-2 upper bound as a special case.\n* Added a Bugzilla reference to the rte_rand() MT safety bug.\n\nRFC v2:\n* Removed 32-bit version of rte_rand() and rte_rand_max().\n* Switched from a four-sequence LFSR (producing a 32-bit number)\n to a five-sequence LFSR (producing a 64-bit number).\n* Added a note on generator not being cryptographically secure.\n\nMattias Rönnblom (6):\n eal: replace libc-based random number generation with LFSR\n eal: add pseudo-random number generation performance test\n eal: improve entropy for initial PRNG seed\n eal: introduce random generator function with upper bound\n eal: add bounded PRNG performance tests\n eal: add PRNG to MAINTAINERS and release notes\n\n MAINTAINERS | 6 +\n app/test/Makefile | 1 +\n app/test/test_rand_perf.c | 92 +++++++++\n doc/guides/rel_notes/release_19_08.rst | 13 ++\n lib/librte_eal/common/include/rte_random.h | 47 +++--\n lib/librte_eal/common/meson.build | 1 +\n lib/librte_eal/common/rte_random.c | 212 +++++++++++++++++++++\n lib/librte_eal/freebsd/eal/Makefile | 1 +\n lib/librte_eal/freebsd/eal/eal.c | 2 -\n lib/librte_eal/linux/eal/Makefile | 1 +\n lib/librte_eal/linux/eal/eal.c | 2 -\n lib/librte_eal/meson.build | 3 +\n lib/librte_eal/rte_eal_version.map | 9 +\n 13 files changed, 368 insertions(+), 22 deletions(-)\n create mode 100644 app/test/test_rand_perf.c\n create mode 100644 lib/librte_eal/common/rte_random.c" }