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From: Pragash Vijayaragavan <pxv3620@rit.edu>
To: dev@dpdk.org
Cc: Minseok Kwon <mxkvcs@rit.edu>
Subject: [dpdk-dev] cuckoo hash in dpdk
Date: Wed, 23 Aug 2017 10:15:37 -0400	[thread overview]
Message-ID: <CANp7S22_QwiMVuQaPLzesMH=XoxUZMbXFPZpPu7zvdGuL1uVHQ@mail.gmail.com> (raw)

Hi,

I got the chance to look at the cuckoo hash used in dpdk and have a query.

would using division and modulo operations be slower than bitwise
operations on RTE_HASH_BUCKET_ENTRIES, specially since
RTE_HASH_BUCKET_ENTRIES is a power of 2.
For example, to do a modulo we can do a "AND" operation on
(RTE_HASH_BUCKET_ENTRIES - 1), which might be faster. We did a cuckoo
filter for VPP and doing this gave a slight improvement in speed.
Is there any particular reason its done this way.

Sorry if i am being wrong in any way, i was just curious.

Thanks,

Pragash Vijayaragavan
Grad Student at Rochester Institute of Technology
email : pxv3620@rit.edu
ph : 585 764 4662

             reply	other threads:[~2017-08-23 14:17 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-08-23 14:15 Pragash Vijayaragavan [this message]
2017-08-23 18:28 ` Dumitrescu, Cristian
2017-08-23 20:20   ` Pragash Vijayaragavan
2017-08-23 20:39     ` Pragash Vijayaragavan
2017-08-24 14:53 ` Andriy Berestovskyy
2017-08-24 18:54   ` Pragash Vijayaragavan
2017-08-25  9:00     ` Andriy Berestovskyy

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