From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Monjalon Subject: Re: [PATCH 0/2] rewritten rte_hash_crc() call Date: Thu, 13 Nov 2014 18:33:14 +0100 Message-ID: <2916837.QJI9btJm0N@xps13> References: <1409724351-23786-1-git-send-email-e_zhumabekov@sts.kz> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7Bit To: dev-VfR2kkLFssw@public.gmane.org Return-path: In-Reply-To: <1409724351-23786-1-git-send-email-e_zhumabekov-8EHiFRVJVgQ@public.gmane.org> List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces-VfR2kkLFssw@public.gmane.org Sender: "dev" Any comment on these patches? 2014-09-03 12:05, Yerden Zhumabekov: > As SSE4.2 provides CRC32 instructions with either 32 and 64 bit operands, > new rte_hash_crc_8byte() call assisted with _mm_crc32_u64 intrinsic may be > useful. > > Then, rte_hash_crc() function is redesigned to take advantage of both 32 > and 64 bit operands. This improves the function's performance significantly. > > Results of my test run on a single CPU core are below. > > CPU: Intel(R) Xeon(R) CPU E5-2620 0 @ 2.00GHz > Number of iterations/chunks: 52428800 > Chunk size: 24 > rte_hash_crc: 0.379 sec, hash: 0x14c64e11 > rte_hash_crc_new: 0.253 sec, hash: 0x14c64e11 > Chunk size: 25 > rte_hash_crc: 0.442 sec, hash: 0xa9afc779 > rte_hash_crc_new: 0.316 sec, hash: 0xa9afc779 > Chunk size: 26 > rte_hash_crc: 0.442 sec, hash: 0x92f2284b > rte_hash_crc_new: 0.316 sec, hash: 0x92f2284b > Chunk size: 27 > rte_hash_crc: 0.442 sec, hash: 0x7c4655ff > rte_hash_crc_new: 0.316 sec, hash: 0x7c4655ff > Chunk size: 28 > rte_hash_crc: 0.442 sec, hash: 0xf577c6b4 > rte_hash_crc_new: 0.316 sec, hash: 0xf577c6b4 > Chunk size: 29 > rte_hash_crc: 0.505 sec, hash: 0x6e18ba55 > rte_hash_crc_new: 0.337 sec, hash: 0x6e18ba55 > Chunk size: 30 > rte_hash_crc: 0.505 sec, hash: 0x35f07dbb > rte_hash_crc_new: 0.337 sec, hash: 0x35f07dbb > Chunk size: 31 > rte_hash_crc: 0.505 sec, hash: 0x1bf2ee8c > rte_hash_crc_new: 0.337 sec, hash: 0x1bf2ee8c > > Yerden Zhumabekov (2): > hash: add new rte_hash_crc_8byte call > hash: rte_hash_crc uses 8- and 4-byte CRC32 intrinsics > > lib/librte_hash/rte_hash_crc.h | 47 +++++++++++++++++++++++++++++++++------- > 1 file changed, 39 insertions(+), 8 deletions(-)