Date: Mon, 14 Jan 2008 09:26:32 +0000 From: "Igor Mozolevsky" <igor@hybrid-lab.co.uk> To: "Nathan Lay" <nslay@comcast.net> Cc: current <current@freebsd.org>, freebsd-current@freebsd.org, Joe Marcus Clarke <marcus@freebsd.org>, Peter Jeremy <peterjeremy@optushome.com.au>, Kostik Belousov <kostikbel@gmail.com> Subject: Re: RFC: Adding a hw.features[2] sysctl Message-ID: <a2b6592c0801140126t4565b582ob4e9d10a4cd98147@mail.gmail.com> In-Reply-To: <478AE741.1000105@comcast.net> References: <1200197787.67286.13.camel@shumai.marcuscom.com> <20080113182457.GN929@server.vk2pj.dyndns.org> <a2b6592c0801131721w25afae5bg3dcf6a90c1a3d2b7@mail.gmail.com> <200801141254.20400.doconnor@gsoft.com.au> <a2b6592c0801131838jcde3634le6087d2f784adcbc@mail.gmail.com> <478AE741.1000105@comcast.net>
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On 14/01/2008, Nathan Lay <nslay@comcast.net> wrote: > I have to agree with Daniel here. ioctl is probably inappropriate. > sysctl is already intended for gathering or setting system information > by both programs and/or people. cat'ing /dev/cpuinfo sounds reminiscent > to Linux /proc. > > sysctl() could fill a cpu features bitmask for programs. > sysctl dev.cpu.features (or something like that) could output those > features in human readable format. So how would you MIB these: " CPU: Dual Core AMD Opteron(tm) Processor 280 (2411.12-MHz K8-class CPU) Origin = "AuthenticAMD" Id = 0x20f12 Stepping = 2 Features=0x178bfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,MMX,FXSR,SSE,SSE2,HTT> Features2=0x1<SSE3> AMD Features=0xe2500800<SYSCALL,NX,MMX+,FFXSR,LM,3DNow!+,3DNow!> AMD Features2=0x3<LAHF,CMP> Cores per package: 2 " ? Would you need four separate MIBs? Have four separate bitmasks in one MIB, what order in? Is there XXX Features3, what would happen then? Igor
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