From: Thomas Monjalon <thomas.monjalon@6wind.com>
To: Jasvinder Singh <jasvinder.singh@intel.com>
Cc: dev@dpdk.org, olivier.matz@6wind.com, declan.doherty@intel.com,
pablo.de.lara.guarch@intel.com
Subject: Re: [dpdk-dev] [PATCH v11 0/2] librte_net: add crc computation support
Date: Wed, 05 Apr 2017 23:00:36 +0200 [thread overview]
Message-ID: <18643891.0Xm9KDEz26@xps13> (raw)
In-Reply-To: <1491425390-71783-1-git-send-email-jasvinder.singh@intel.com>
2017-04-05 21:49, Jasvinder Singh:
> In some applications, CRC (Cyclic Redundancy Check) needs to be computed
> or updated during packet processing operations. This patchset adds
> software implementation of some common standard CRCs (32-bit Ethernet
> CRC as per Ethernet/[ISO/IEC 8802-3] and 16-bit CCITT-CRC [ITU-T X.25]).
> Two versions of each 32-bit and 16-bit CRC calculation are proposed.
>
> The first version presents a fast and efficient CRC generation on IA
> processors by using the carry-less multiplication instruction � PCLMULQDQ
> (i.e SSE4.2 instrinsics). In this implementation, a parallelized folding
> approach has been used to first reduce an arbitrary length buffer to a small
> fixed size length buffer (16 bytes) with the help of precomputed constants.
> The resultant single 16-bytes chunk is further reduced by Barrett reduction
> method to generate final CRC value. For more details on the implementation,
> see reference [1].
>
> The second version presents the fallback solution to support the CRC
> generation without needing any specific support from CPU (for examples-
> SSE4.2 intrinsics). It is based on generic Look-Up Table(LUT) algorithm
> that uses precomputed 256 element table as explained in reference[2].
>
> During intialisation, all the data structures required for CRC computation
> are initialised. Also, x86 specific crc implementation (if supported by
> the platform) or scalar version is enabled.
Applied (with one last fix), thanks
next prev parent reply other threads:[~2017-04-05 21:00 UTC|newest]
Thread overview: 69+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-24 20:54 [dpdk-dev] [PATCH " Jasvinder Singh
2017-02-24 20:54 ` [dpdk-dev] [PATCH 1/2] librte_net: add crc init and compute APIs Jasvinder Singh
2017-02-28 12:08 ` [dpdk-dev] [PATCH v2 0/2] librte_net: add crc computation support Jasvinder Singh
2017-02-28 12:08 ` [dpdk-dev] [PATCH v2 1/2] librte_net: add crc init and compute APIs Jasvinder Singh
2017-02-28 12:15 ` Jerin Jacob
2017-03-01 18:46 ` Thomas Monjalon
2017-03-02 13:03 ` Singh, Jasvinder
2017-03-06 15:27 ` Thomas Monjalon
2017-03-08 11:08 ` De Lara Guarch, Pablo
2017-03-15 17:35 ` Thomas Monjalon
2017-03-15 19:03 ` Dumitrescu, Cristian
2017-03-15 20:15 ` Thomas Monjalon
2017-03-15 21:11 ` Dumitrescu, Cristian
2017-03-15 19:09 ` Dumitrescu, Cristian
2017-03-12 21:33 ` [dpdk-dev] [PATCH v3 0/2] librte_net: add crc computation support Jasvinder Singh
2017-03-12 21:33 ` [dpdk-dev] [PATCH v3 1/2] librte_net: add crc compute APIs Jasvinder Singh
2017-03-13 3:06 ` Ananyev, Konstantin
2017-03-13 9:05 ` Singh, Jasvinder
2017-03-20 19:29 ` [dpdk-dev] [PATCH v4 0/2] librte_net: add crc computation support Jasvinder Singh
2017-03-20 19:29 ` [dpdk-dev] [PATCH v4 1/2] librte_net: add crc compute APIs Jasvinder Singh
2017-03-21 14:45 ` [dpdk-dev] [PATCH v5 0/2] librte_net: add crc computation support Jasvinder Singh
2017-03-21 14:45 ` [dpdk-dev] [PATCH v5 1/2] librte_net: add crc compute APIs Jasvinder Singh
2017-03-28 18:04 ` De Lara Guarch, Pablo
2017-03-28 18:07 ` De Lara Guarch, Pablo
2017-03-28 19:21 ` Singh, Jasvinder
2017-03-29 12:42 ` [dpdk-dev] [PATCH v6 0/2] librte_net: add crc computation support Jasvinder Singh
2017-03-29 12:42 ` [dpdk-dev] [PATCH v6 1/2] librte_net: add crc compute APIs Jasvinder Singh
2017-03-29 16:14 ` De Lara Guarch, Pablo
2017-03-29 17:15 ` [dpdk-dev] [PATCH v7 0/2] librte_net: add crc computation support Jasvinder Singh
2017-03-29 17:15 ` [dpdk-dev] [PATCH v7 1/2] librte_net: add crc compute APIs Jasvinder Singh
2017-03-30 11:30 ` [dpdk-dev] [PATCH v8 0/2] librte_net: add crc computation support Jasvinder Singh
2017-03-30 11:30 ` [dpdk-dev] [PATCH v8 1/2] librte_net: add crc compute APIs Jasvinder Singh
2017-03-30 11:31 ` Ananyev, Konstantin
2017-03-30 12:06 ` Singh, Jasvinder
2017-03-30 14:40 ` Olivier Matz
2017-03-30 15:14 ` Singh, Jasvinder
2017-03-30 16:15 ` [dpdk-dev] [PATCH v9 0/3] librte_net: add crc computation support Jasvinder Singh
2017-03-30 16:15 ` [dpdk-dev] [PATCH v9 1/3] librte_net: add crc compute APIs Jasvinder Singh
2017-04-04 20:00 ` Thomas Monjalon
2017-04-05 14:58 ` [dpdk-dev] [PATCH v10 0/2] librte_net: add crc computation support Jasvinder Singh
2017-04-05 14:58 ` [dpdk-dev] [PATCH v10 1/2] librte_net: add crc compute APIs Jasvinder Singh
2017-04-05 17:49 ` Thomas Monjalon
2017-04-05 19:22 ` Singh, Jasvinder
2017-04-05 20:49 ` [dpdk-dev] [PATCH v11 0/2] librte_net: add crc computation support Jasvinder Singh
2017-04-05 20:49 ` [dpdk-dev] [PATCH v11 1/2] librte_net: add crc compute APIs Jasvinder Singh
2017-04-05 20:49 ` [dpdk-dev] [PATCH v11 2/2] test/test: add unit test for CRC computation Jasvinder Singh
2017-04-05 20:59 ` Thomas Monjalon
2017-04-05 21:00 ` Thomas Monjalon [this message]
2017-04-05 14:58 ` [dpdk-dev] [PATCH v10 " Jasvinder Singh
2017-03-30 16:15 ` [dpdk-dev] [PATCH v9 2/3] " Jasvinder Singh
2017-03-30 16:15 ` [dpdk-dev] [PATCH v9 3/3] maintainers: add packet crc section and claim maintainership Jasvinder Singh
2017-04-04 19:55 ` Thomas Monjalon
2017-04-04 20:02 ` [dpdk-dev] [PATCH v9 0/3] librte_net: add crc computation support Thomas Monjalon
2017-04-05 8:34 ` Singh, Jasvinder
2017-04-05 9:01 ` Thomas Monjalon
2017-04-05 9:37 ` Richardson, Bruce
2017-04-05 12:52 ` Singh, Jasvinder
2017-03-30 11:30 ` [dpdk-dev] [PATCH v8 2/2] test/test: add unit test for CRC computation Jasvinder Singh
2017-03-29 17:15 ` [dpdk-dev] [PATCH v7 " Jasvinder Singh
2017-03-29 12:42 ` [dpdk-dev] [PATCH v6 " Jasvinder Singh
2017-03-29 16:12 ` De Lara Guarch, Pablo
2017-03-21 14:45 ` [dpdk-dev] [PATCH v5 " Jasvinder Singh
2017-03-28 19:23 ` De Lara Guarch, Pablo
2017-03-28 19:27 ` Singh, Jasvinder
2017-03-20 19:29 ` [dpdk-dev] [PATCH v4 2/2] app/test: " Jasvinder Singh
2017-03-21 7:14 ` Peng, Yuan
2017-03-12 21:33 ` [dpdk-dev] [PATCH v3 " Jasvinder Singh
2017-02-28 12:08 ` [dpdk-dev] [PATCH v2 " Jasvinder Singh
2017-02-24 20:54 ` [dpdk-dev] [PATCH " Jasvinder Singh
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