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{
    "id": 53393,
    "url": "http://patches.dpdk.org/api/covers/53393/?format=api",
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    "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"
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    "msgid": "<20190514092046.30808-1-mattias.ronnblom@ericsson.com>",
    "date": "2019-05-14T09:20:40",
    "name": "[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/cover/53393/mbox/",
    "series": [
        {
            "id": 4650,
            "url": "http://patches.dpdk.org/api/series/4650/?format=api",
            "web_url": "http://patches.dpdk.org/project/dpdk/list/?series=4650",
            "date": "2019-05-14T09:20:40",
            "name": "Pseudo-random number generation improvements",
            "version": 1,
            "mbox": "http://patches.dpdk.org/series/4650/mbox/"
        }
    ],
    "comments": "http://patches.dpdk.org/api/covers/53393/comments/",
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        ],
        "Date": "Tue, 14 May 2019 11:20:40 +0200",
        "Content-Type": "text/plain; charset=\"UTF-8\"",
        "Subject": "[dpdk-dev] [PATCH 0/6] Pseudo-random number generation improvements",
        "In-Reply-To": "<20190508181014.7dde7580@xps13>",
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        "Message-ID": "<20190514092046.30808-1-mattias.ronnblom@ericsson.com>",
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        "X-Original-To": "patchwork@dpdk.org",
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    "content": "Make DPDK pseudo-random number generation multi-thread safe, go faster\nand produce better-quality pseudo-random numbers.\n\nThanks to Stephen Hemminger, Keith Wiles and Neil Horman for valuable\nfeedback.\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 pseudo-random number generation to MAINTAINERS\n\n MAINTAINERS                                |   6 +\n app/test/Makefile                          |   1 +\n app/test/test_rand_perf.c                  |  92 ++++++++++\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         | 188 +++++++++++++++++++++\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/rte_eal_version.map         |   9 +\n 11 files changed, 328 insertions(+), 22 deletions(-)\n create mode 100644 app/test/test_rand_perf.c\n create mode 100644 lib/librte_eal/common/rte_random.c"
}