Date: Mon, 29 Jun 2015 20:19:30 +0300 From: Slawa Olhovchenkov <slw@zxy.spb.ru> To: Navdeep Parhar <np@FreeBSD.org> Cc: freebsd-net@freebsd.org Subject: Re: netmap custom RSS and custom packet info Message-ID: <20150629171930.GH1647@zxy.spb.ru> In-Reply-To: <55917B43.70904@FreeBSD.org> References: <20150629151750.GD1647@zxy.spb.ru> <55917B43.70904@FreeBSD.org>
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On Mon, Jun 29, 2015 at 10:07:15AM -0700, Navdeep Parhar wrote: > On 06/29/2015 08:17, Slawa Olhovchenkov wrote: > ... > > b) custom RSS. Modern NIC have RSS poorly interoperable with packet > > analysing: packets from same flow, but different direction placed in > > different queue, ... > > This is default behavior because the default hash (Toeplitz) is not > symmetrical. There are modern NICs that do support other, symmetrical > hashes. Anyway this is still hardware-depended. I am don't see symmetrical hashes for 1G/10G Intel cards.
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