Date: Wed, 19 Jun 2013 10:52:06 -0600 From: "Justin T. Gibbs" <gibbs@FreeBSD.org> To: Jeroen van der Ham <jeroen@dckd.nl> Cc: freebsd-xen@freebsd.org, xen-users@lists.xen.org, xen-devel <xen-devel@lists.xen.org>, freebsd-virtualization@freebsd.org Subject: Re: FreeBSD PVHVM call for testing Message-ID: <E8150505-ECA0-4CB6-B777-A41334B8B903@FreeBSD.org> In-Reply-To: <546D0358-4F92-4E8C-AED0-94FC5D36086F@dckd.nl> References: <519131D8.9010307@citrix.com> <519E54DE.5090304@citrix.com> <51B5E730.6070007@citrix.com> <51B9FF53.2020901@citrix.com> <2C70BC9B-5964-498F-AAE2-E5024160E3E5@dckd.nl> <51C1972B.50703@citrix.com> <C4BE5FBE-DF19-404F-B478-0F33D716454F@dckd.nl> <51C1A223.6030305@citrix.com> <6E99C9B2-E28D-4793-81C2-97440AC5AD0E@dckd.nl> <51C1A7AA.2010307@citrix.com> <B6D2239B-86D0-4B1B-A357-63F6E5A18284@dckd.nl> <BB38EA9B-54E4-43CD-AF49-7B480DC50BFF@freebsd.org> <546D0358-4F92-4E8C-AED0-94FC5D36086F@dckd.nl>
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On Jun 19, 2013, at 10:50 AM, Jeroen van der Ham <jeroen@dckd.nl> wrote: > Hi, >=20 > On 19 Jun 2013, at 18:15, Justin T. Gibbs <gibbs@FreeBSD.org> wrote: >>=20 >> I've never seen a kernel build take 2 hours, much less 2 hours = *longer*. Are you talking about buildworld? It would be interesting to = know your results building stable/9 sources in your 10 environment to = see if this is just due to "build bloat" or a true performance = regression. >>=20 >=20 > I copy/pasted the command from the wiki: >=20 >> # make kernel-toolchain && make buildkernel KERNCONF=3DXENHVM && make = installkernel KERNCONF=3DXENHVM >=20 > On the stable/9 I only did=20 >=20 >> make buildkernel KERNCONF=3DXENHVM && make installkernel = KERNCONF=3DXENHVM >=20 >=20 > I guess the kernel-toolchain takes a long time to build=85and from = what I can see it does a clean before rebuilding also. >=20 > I'm doing the kernel-toolchain step only now and will report how long = it took. >=20 > Jeroen. Oh. Without any parallelism (-j X), the build will take a really long = time. Even with only one core, you'll get a large speedup by performing = a parallel build since many steps of the build are I/O bound. -- Justin=
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