Date: Sun, 7 Jun 2026 22:15:41 -0700 From: "Jin Guojun[VFF]" <jguojun@gmail.com> To: questions@freebsd.org Subject: Re: cpu vs CPUTYPE Message-ID: <bea195b4-7851-4af6-96f3-989fe7fadf78@gmail.com> In-Reply-To: <aiRyHHDFJfVW_BdS@www.stare.cz>
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On 6/6/26 12:16, Jan Stary wrote: > Dear all, > > I just installed 15.0-RELEASE on this HP EliteBook 820 (dmesg below). > It seems to be running fine; as a test of stability, I would like > to recompile GENERIC as is. Without any make.conf or src.conf, > 'time make -j4 buildkernel' works and the installed kernel boots. > > Now, as a first step, I would like to recompile again, taking advantage > of the optimizations when a specific cpu is set. It seems there are > two places where I can specify that: > > the KERNCONF (= GENERIC) says 'cpu HAMMER' > and make.conf has the CPUTYPE variable. > > What is the relation of the two? > > My actual cpu is an Intel(R) Core(TM) i7-4600U; > that's not HAMMER, about which NOTES says > > cpu HAMMER # aka K8, aka Opteron & Athlon64 > > and the closest CPUTYPE out of > > # (Intel CPUs) alderlake, sapphirerapids, tigerlake, cooperlake, > # cascadelake, tremont, goldmont-plus, icelake-server, > # icelake-client, cannonlake, knm, skylake-avx512, knl, > # goldmont, skylake, broadwell, haswell, ivybridge, > # sandybridge, westmere, nehalem, silvermont, bonnell, > # core2, core, nocona, pentium4m, pentium4, prescott, > # pentium3m, pentium3, pentium-m, pentium2, pentiumpro, > # pentium-mmx, pentium, i486 > > listed in the example make.conf seems to be 'core' (right?) The Intel Core i7-4600U (4th Gen) official architectural code name is Haswell, which should be the CPUTYPE. Core Ultra (Series 1 & 2): Meteor Lake and Arrow Lake 14th/13th Gen: Raptor Lake 12th Gen: Alder Lake 11th Gen: Rocket Lake 10th Gen: Comet Lake / Ice Lake 9th/8th Gen: Coffee Lake 7th Gen: Kaby Lake 6th Gen: Skylake Older (1st-5th Gen): Broadwell, Haswell, Ivy Bridge, Sandy Bridge, Westmere, and Nehalem. -Jinhome | help
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