Date: Tue, 12 Mar 2019 08:46:36 -0700 From: John Baldwin <jhb@FreeBSD.org> To: Slawa Olhovchenkov <slw@zxy.spb.ru> Cc: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: Re: svn commit: r345040 - in stable/11: share/man/man4 sys/conf sys/dev/cxgbe sys/dev/cxgbe/crypto sys/dev/cxgbe/firmware sys/modules/cxgbe sys/modules/cxgbe/ccr sys/powerpc/conf Message-ID: <be8fd4b7-403c-4958-6682-673ba6da9ce1@FreeBSD.org> In-Reply-To: <20190312133258.GA6462@zxy.spb.ru> References: <201903112316.x2BNGA4b092507@repo.freebsd.org> <20190312133258.GA6462@zxy.spb.ru>
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On 3/12/19 6:32 AM, Slawa Olhovchenkov wrote: > On Mon, Mar 11, 2019 at 11:16:10PM +0000, John Baldwin wrote: > >> Author: jhb >> Date: Mon Mar 11 23:16:10 2019 >> New Revision: 345040 >> URL: https://svnweb.freebsd.org/changeset/base/345040 >> >> Log: >> MFC 318429,318967,319721,319723,323600,323724,328353-328361,330042,343056: >> Add a driver for the Chelsio T6 crypto accelerator engine. > > Where I can find example/manual of use this engine from userspace? It's hard to use usefully from userspace (even in 12/head). I have some old patches for openssl 1.0.2's cryptodev engine to teach it about more of the algorithms supported by OCF including the TLS variant of AES-GCM, but I found that the overhead of the extra copies made it not very compelling compared to using AES-NI in userland. (I had some extra changes to make /dev/crypto wire the user pages to avoid the copies and that got the /dev/crypto case down to break-even with doing AES-NI in userland.) In the kernel I see better performance where using T6 to offload crypto for IPsec does use less CPU at higher throughput than using CPU instructions though for AES-GCM AES-NI on the CPU is pretty close. -- John Baldwin
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