From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Kevin J. Cummings" Subject: Re: smp question Date: Tue, 30 Nov 2004 11:56:21 -0500 Message-ID: <41ACA635.4040204@kjchome.homeip.net> References: <41AB569E.3000309@udesa.edu.ar> <41ABB73D.9030400@kjchome.homeip.net> <41AC74C8.8090405@udesa.edu.ar> Mime-Version: 1.0 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <41AC74C8.8090405@udesa.edu.ar> Sender: linux-admin-owner@vger.kernel.org List-Id: Content-Type: text/plain; charset="iso-8859-1"; format="flowed" To: =?ISO-8859-1?Q?Mat=EDas_L=F3pez_Bergero?= Cc: linux-admin Mat=EDas L=F3pez Bergero wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 >=20 > Kevin J. Cummings wrote: > | Mat=EDas L=F3pez Bergero wrote: > |> I have a SMP capable server, but with only one cpu installed. > |> Should I enable SMP support on the kernel? I'm trying to reach the= best > |> performance. > |> The cpu is Intel Xeon, this option is not in the cpu list in the k= ernel > |> config. Should I chose P4 or P3? it is the same? > | > | IIRC, Xeon processors have dual internal cores (or at least dual > | instruction decode paths), and act like dual processors, and benefi= t > | from the SMP kernels. Also, IIRC, there were both P3 and P4 Xeons = made. > | So, you have to know which version you have. > | > | What does "cat /proc/cpuinfo" tell you? > | >=20 > I'm seeing two processors, I had notes this before, but I was in doub= t > if that output was produced by the SMP kernel, or the Xeon cpu, now > according to what you are telling me, it's a feature of the Xeon cpu = right? If I remember Correctly, yes, its a feature of the XEON CPU. (I have=20 athlons here at home!) > Here is my cpuinfo: >=20 > sh-2.05b# cat /proc/cpuinfo > processor : 0 > vendor_id : GenuineIntel > cpu family : 15 > model : 2 > model name : Intel(R) Xeon(TM) CPU 2.80GHz This looks like a P4 Xeon: 2.80GHz speed > stepping : 9 > cpu MHz : 2800.195 > cache size : 512 KB > physical id : 0 > siblings : 2 Yeup, looks like 2 instruction pipelines. > runqueue : 0 > fdiv_bug : no > hlt_bug : no > f00f_bug : no > coma_bug : no > fpu : yes > fpu_exception : yes > cpuid level : 2 > wp : yes > flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pg= e > mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 > ss ht tm > bogomips : 5583.66 And the second "processor": > processor : 1 > vendor_id : GenuineIntel > cpu family : 15 > model : 2 > model name : Intel(R) Xeon(TM) CPU 2.80GHz > stepping : 9 > cpu MHz : 2800.195 > cache size : 512 KB > physical id : 0 > siblings : 2 > runqueue : 0 > fdiv_bug : no > hlt_bug : no > f00f_bug : no > coma_bug : no > fpu : yes > fpu_exception : yes > cpuid level : 2 > wp : yes > flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pg= e > mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 > ss ht tm > bogomips : 5596.77 >=20 > sh-2.05b# >=20 > Thanks for ur help Kevin! NP --=20 Kevin J. Cummings kjchome@rcn.com cummings@kjchome.homeip.net cummings@kjc386.framingham.ma.us - To unsubscribe from this list: send the line "unsubscribe linux-admin" = in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html