Date: Mon, 01 Dec 2014 23:59:56 -0500 From: "George Neville-Neil" <gnn@neville-neil.com> To: "Julian Elischer" <julian@freebsd.org> Cc: Craig Rodrigues <rodrigc@FreeBSD.org>, FreeBSD Net <freebsd-net@freebsd.org>, "freebsd-virtualization@freebsd.org" <freebsd-virtualization@freebsd.org>, freebsd-arch <freebsd-arch@freebsd.org> Subject: Re: Enabling VIMAGE in GENERIC Message-ID: <84B51B87-22E2-4A8D-BB31-DFB1ADBAD05E@neville-neil.com> In-Reply-To: <547D3C3A.5030408@freebsd.org> References: <CAG=rPVccq7R5%2Bcbm6nR1WCZDM=-xwwkmF=cw8PCuk58oHPA-gQ@mail.gmail.com> <1423616F-F44D-47E5-8595-DE862DC04464@bsdimp.com> <546A34C8.6060004@freebsd.org> <CAG=rPVeEEuK874g6%2BfVpHa5J_4V%2BA%2BQNbB5bCpXiS86jZW_U3Q@mail.gmail.com> <546C8812.2070904@FreeBSD.org> <20141119195923.GS24601@funkthat.com> <CAG=rPVdrjim_28ntxUv6qJxb-_bGhGabZipFyYzNuydZ2XPm5Q@mail.gmail.com> <69A8C06F-A7F6-49EC-8601-91AC4CDBFB13@FreeBSD.org> <547364EB.7090505@freebsd.org> <CAG=rPVeAM2_EEVYyhQiuXV7i%2Bpvw-uPYRBbjXeZhZKbrZzHRMg@mail.gmail.com> <547AEB93.3050600@freebsd.org> <CAF05609-FCB4-4CB6-9533-A1F32A7F3F22@neville-neil.com> <547D3C3A.5030408@freebsd.org>
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On 1 Dec 2014, at 23:12, Julian Elischer wrote: > On 12/2/14, 12:07 PM, George Neville-Neil wrote: >> On 30 Nov 2014, at 5:04, Julian Elischer wrote: >> >>> On 11/29/14, 5:28 PM, Craig Rodrigues wrote: >>>> On Mon, Nov 24, 2014 at 9:03 AM, Julian Elischer = >>>> <julian@freebsd.org <mailto:julian@freebsd.org>> wrote: >>>> > >>>> > >>>> > also look at the following: (a little dated) >>>> > >>>> > = >>>> http://p4web.freebsd.org/@md=3Dd&cd=3D//depot/projects/vimage/&cdf=3D= //depot/projects/vimage/porting_to_vimage.txt&c=3DtO0@//depot/projects/vi= mage/porting_to_vimage.txt?ac=3D22 >>>> >>>> >>>> This is a useful document. I put it on the wiki: = >>>> https://wiki.freebsd.org/VIMAGE/porting-to-vimage >>> >>> Thanks.. wow, did I actually know ALL that only 5 years ago? >>> Scary. probbaly worth having someone who is currently active and up = >>> to date look at it to see if it's all still correct.. >>> especially the module load/unload stuff. >>> >>>> >>>> -- = >>>> Craig >>> >> >> >> On a slight tangent. I ran VIMAGE kernels vs. non VIMAGE kernels for = >> both a VANILLA kernel >> and a PF kernel (PF on but no rules) as a quick smoke test today. The = >> raw forwarding performance >> was unchanged between kernels with and without VIMAGE on a 10G based = >> system in the Sentex lab >> (lion1). I will be doing a bit more work in this area and will then = >> put up some results in my >> netperf github repo. >> >> The tests are easy enough to run if you have 3 systems, and Conductor = >> installed. The source, sink >> and dut config files are all there to be updated and tried. >> >> Best, >> George >> >> > the interesting benchmarks are if you have multiple sessions and = > spread them across multiple vimage jails, and compare that with the = > same number of sessions crowded onto a single machine.. > > lock contention goes down of course so things can actually get faster. All in good time. Best, George
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