topic Re: How to find out the number of CPUs in the server in Operating System - Linux https://community.hpe.com/t5/operating-system-linux/how-to-find-out-the-number-of-cpus-in-the-server/m-p/4004176#M28410 Hi Ivan,<BR /><BR />I have gone through the posts. but no one has given a clear idea. I am attaching the output of /proc/cpuinfo, can u just figure it out ?<BR /><BR />processor : 0<BR />vendor_id : GenuineIntel<BR />cpu family : 15<BR />model : 4<BR />model name : Intel(R) Xeon(TM) CPU 3.00GHz<BR />stepping : 8<BR />cpu MHz : 2995.051<BR />cache size : 2048 KB<BR />physical id : 0<BR />siblings : 2<BR />core id : 0<BR />cpu cores : 2<BR />fdiv_bug : no<BR />hlt_bug : no<BR />f00f_bug : no<BR />coma_bug : no<BR />fpu : yes<BR />fpu_exception : yes<BR />cpuid level : 5<BR />wp : yes<BR />flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat<BR />pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm pni monitor ds_cpl est<BR />cid xtpr<BR />bogomips : 5994.51<BR /><BR />processor : 1<BR />vendor_id : GenuineIntel<BR />cpu family : 15<BR />model : 4<BR />model name : Intel(R) Xeon(TM) CPU 3.00GHz<BR />stepping : 8<BR />cpu MHz : 2995.051<BR />cache size : 2048 KB<BR />physical id : 0<BR />siblings : 2<BR />core id : 1<BR />cpu cores : 2<BR />fdiv_bug : no<BR />hlt_bug : no<BR />f00f_bug : no<BR />coma_bug : no<BR />fpu : yes<BR />fpu_exception : yes<BR />cpuid level : 5<BR />wp : yes<BR />flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat<BR />pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm pni monitor ds_cpl est<BR />cid xtpr<BR />bogomips : 5984.06<BR /><BR />processor : 2<BR />vendor_id : GenuineIntel<BR />cpu family : 15<BR />model : 4<BR />model name : Intel(R) Xeon(TM) CPU 3.00GHz<BR />stepping : 8<BR />cpu MHz : 2995.051<BR />cache size : 2048 KB<BR />physical id : 1<BR />siblings : 2<BR />core id : 2<BR />cpu cores : 2<BR />fdiv_bug : no<BR />hlt_bug : no<BR />f00f_bug : no<BR />coma_bug : no<BR />fpu : yes<BR />fpu_exception : yes<BR />cpuid level : 5<BR />wp : yes<BR />flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat<BR />pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm pni monitor ds_cpl est<BR />cid xtpr<BR />bogomips : 5984.16<BR /><BR />processor : 3<BR />vendor_id : GenuineIntel<BR />cpu family : 15<BR />model : 4<BR />model name : Intel(R) Xeon(TM) CPU 3.00GHz<BR />stepping : 8<BR />cpu MHz : 2995.051<BR />cache size : 2048 KB<BR />physical id : 1<BR />siblings : 2<BR />core id : 3<BR />cpu cores : 2<BR />fdiv_bug : no<BR />hlt_bug : no<BR />f00f_bug : no<BR />coma_bug : no<BR />fpu : yes<BR />fpu_exception : yes<BR />cpuid level : 5<BR />wp : yes<BR />wp : yes<BR />flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat<BR />pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm pni monitor ds_cpl est<BR />cid xtpr<BR />bogomips : 5984.11<BR /><BR />processor : 4<BR />vendor_id : GenuineIntel<BR />cpu family : 15<BR />model : 4<BR />model name : Intel(R) Xeon(TM) CPU 3.00GHz<BR />stepping : 8<BR />cpu MHz : 2995.051<BR />cache size : 2048 KB<BR />physical id : 2<BR />siblings : 2<BR />core id : 4<BR />cpu cores : 2<BR />fdiv_bug : no<BR />hlt_bug : no<BR />f00f_bug : no<BR />coma_bug : no<BR />fpu : yes<BR />fpu_exception : yes<BR />cpuid level : 5<BR />wp : yes<BR />flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat<BR />pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm pni monitor ds_cpl est<BR />cid xtpr<BR />bogomips : 5984.82<BR /><BR />processor : 5<BR />vendor_id : GenuineIntel<BR />cpu family : 15<BR />model : 4<BR />model name : Intel(R) Xeon(TM) CPU 3.00GHz<BR />stepping : 8<BR />cpu MHz : 2995.051<BR />cache size : 2048 KB<BR />physical id : 2<BR />siblings : 2<BR />core id : 5<BR />cpu cores : 2<BR />fdiv_bug : no<BR />hlt_bug : no<BR />f00f_bug : no<BR />coma_bug : no<BR />fpu : yes<BR />fpu_exception : yes<BR />cpuid level : 5<BR />wp : yes<BR />flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat<BR />pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm pni monitor ds_cpl est<BR />cid xtpr<BR />bogomips : 5984.08<BR /><BR />processor : 6<BR />vendor_id : GenuineIntel<BR />cpu family : 15<BR />model : 4<BR />model name : Intel(R) Xeon(TM) CPU 3.00GHz<BR />stepping : 8<BR />cpu MHz : 2995.051<BR />cache size : 2048 KB<BR />physical id : 3<BR />siblings : 2<BR />core id : 6<BR />cpu cores : 2<BR />fdiv_bug : no<BR />hlt_bug : no<BR />f00f_bug : no<BR />coma_bug : no<BR />fpu : yes<BR />fpu_exception : yes<BR />cpuid level : 5<BR />wp : yes<BR />flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat<BR />pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm pni monitor ds_cpl est<BR />cid xtpr<BR />bogomips : 5983.74<BR /><BR />processor : 7<BR />vendor_id : GenuineIntel<BR />cpu family : 15<BR />model : 4<BR />model name : Intel(R) Xeon(TM) CPU 3.00GHz<BR />stepping : 8<BR />cpu MHz : 2995.051<BR />cache size : 2048 KB<BR />physical id : 3<BR />siblings : 2<BR />core id : 7<BR />cpu cores : 2<BR />fdiv_bug : no<BR />hlt_bug : no<BR />f00f_bug : no<BR />coma_bug : no<BR />fpu : yes<BR />fpu_exception : yes<BR />cpuid level : 5<BR />wp : yes<BR />flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat<BR />pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm pni monitor ds_cpl est<BR />cid xtpr<BR />bogomips : 5984.85<BR /><BR />How many CPUs are physically present in this server. I think its 2 CPUs with Dual core and HT on ???<BR /><BR />Thanks. Mon, 21 May 2007 12:20:01 GMT Adithyan 2007-05-21T12:20:01Z How to find out the number of CPUs in the server https://community.hpe.com/t5/operating-system-linux/how-to-find-out-the-number-of-cpus-in-the-server/m-p/4004173#M28407 Hi,<BR /><BR />How to find the number of Physical CPUs installed in the server from the OS.<BR /><BR />/proc/cpuinfo will give the logical CPUs whcih are showing may be because Hyper threading/Dual core.<BR /><BR />Pls share..<BR /><BR />Thanks<BR />Adityan Mon, 21 May 2007 10:30:16 GMT https://community.hpe.com/t5/operating-system-linux/how-to-find-out-the-number-of-cpus-in-the-server/m-p/4004173#M28407 Adithyan 2007-05-21T10:30:16Z Re: How to find out the number of CPUs in the server https://community.hpe.com/t5/operating-system-linux/how-to-find-out-the-number-of-cpus-in-the-server/m-p/4004174#M28408 Please see:<BR /><BR /><A href="http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=1008505" target="_blank">http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=1008505</A> Mon, 21 May 2007 10:46:17 GMT https://community.hpe.com/t5/operating-system-linux/how-to-find-out-the-number-of-cpus-in-the-server/m-p/4004174#M28408 Ivan Ferreira 2007-05-21T10:46:17Z Re: How to find out the number of CPUs in the server https://community.hpe.com/t5/operating-system-linux/how-to-find-out-the-number-of-cpus-in-the-server/m-p/4004175#M28409 Shalom<BR /><BR />hwinfo should be able to provide accurate information on the number of physical cpus<BR /><BR />Its a gui though.<BR /><BR />SEP Mon, 21 May 2007 11:56:13 GMT https://community.hpe.com/t5/operating-system-linux/how-to-find-out-the-number-of-cpus-in-the-server/m-p/4004175#M28409 Steven E. Protter 2007-05-21T11:56:13Z Re: How to find out the number of CPUs in the server https://community.hpe.com/t5/operating-system-linux/how-to-find-out-the-number-of-cpus-in-the-server/m-p/4004176#M28410 Hi Ivan,<BR /><BR />I have gone through the posts. but no one has given a clear idea. I am attaching the output of /proc/cpuinfo, can u just figure it out ?<BR /><BR />processor : 0<BR />vendor_id : GenuineIntel<BR />cpu family : 15<BR />model : 4<BR />model name : Intel(R) Xeon(TM) CPU 3.00GHz<BR />stepping : 8<BR />cpu MHz : 2995.051<BR />cache size : 2048 KB<BR />physical id : 0<BR />siblings : 2<BR />core id : 0<BR />cpu cores : 2<BR />fdiv_bug : no<BR />hlt_bug : no<BR />f00f_bug : no<BR />coma_bug : no<BR />fpu : yes<BR />fpu_exception : yes<BR />cpuid level : 5<BR />wp : yes<BR />flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat<BR />pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm pni monitor ds_cpl est<BR />cid xtpr<BR />bogomips : 5994.51<BR /><BR />processor : 1<BR />vendor_id : GenuineIntel<BR />cpu family : 15<BR />model : 4<BR />model name : Intel(R) Xeon(TM) CPU 3.00GHz<BR />stepping : 8<BR />cpu MHz : 2995.051<BR />cache size : 2048 KB<BR />physical id : 0<BR />siblings : 2<BR />core id : 1<BR />cpu cores : 2<BR />fdiv_bug : no<BR />hlt_bug : no<BR />f00f_bug : no<BR />coma_bug : no<BR />fpu : yes<BR />fpu_exception : yes<BR />cpuid level : 5<BR />wp : yes<BR />flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat<BR />pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm pni monitor ds_cpl est<BR />cid xtpr<BR />bogomips : 5984.06<BR /><BR />processor : 2<BR />vendor_id : GenuineIntel<BR />cpu family : 15<BR />model : 4<BR />model name : Intel(R) Xeon(TM) CPU 3.00GHz<BR />stepping : 8<BR />cpu MHz : 2995.051<BR />cache size : 2048 KB<BR />physical id : 1<BR />siblings : 2<BR />core id : 2<BR />cpu cores : 2<BR />fdiv_bug : no<BR />hlt_bug : no<BR />f00f_bug : no<BR />coma_bug : no<BR />fpu : yes<BR />fpu_exception : yes<BR />cpuid level : 5<BR />wp : yes<BR />flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat<BR />pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm pni monitor ds_cpl est<BR />cid xtpr<BR />bogomips : 5984.16<BR /><BR />processor : 3<BR />vendor_id : GenuineIntel<BR />cpu family : 15<BR />model : 4<BR />model name : Intel(R) Xeon(TM) CPU 3.00GHz<BR />stepping : 8<BR />cpu MHz : 2995.051<BR />cache size : 2048 KB<BR />physical id : 1<BR />siblings : 2<BR />core id : 3<BR />cpu cores : 2<BR />fdiv_bug : no<BR />hlt_bug : no<BR />f00f_bug : no<BR />coma_bug : no<BR />fpu : yes<BR />fpu_exception : yes<BR />cpuid level : 5<BR />wp : yes<BR />wp : yes<BR />flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat<BR />pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm pni monitor ds_cpl est<BR />cid xtpr<BR />bogomips : 5984.11<BR /><BR />processor : 4<BR />vendor_id : GenuineIntel<BR />cpu family : 15<BR />model : 4<BR />model name : Intel(R) Xeon(TM) CPU 3.00GHz<BR />stepping : 8<BR />cpu MHz : 2995.051<BR />cache size : 2048 KB<BR />physical id : 2<BR />siblings : 2<BR />core id : 4<BR />cpu cores : 2<BR />fdiv_bug : no<BR />hlt_bug : no<BR />f00f_bug : no<BR />coma_bug : no<BR />fpu : yes<BR />fpu_exception : yes<BR />cpuid level : 5<BR />wp : yes<BR />flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat<BR />pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm pni monitor ds_cpl est<BR />cid xtpr<BR />bogomips : 5984.82<BR /><BR />processor : 5<BR />vendor_id : GenuineIntel<BR />cpu family : 15<BR />model : 4<BR />model name : Intel(R) Xeon(TM) CPU 3.00GHz<BR />stepping : 8<BR />cpu MHz : 2995.051<BR />cache size : 2048 KB<BR />physical id : 2<BR />siblings : 2<BR />core id : 5<BR />cpu cores : 2<BR />fdiv_bug : no<BR />hlt_bug : no<BR />f00f_bug : no<BR />coma_bug : no<BR />fpu : yes<BR />fpu_exception : yes<BR />cpuid level : 5<BR />wp : yes<BR />flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat<BR />pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm pni monitor ds_cpl est<BR />cid xtpr<BR />bogomips : 5984.08<BR /><BR />processor : 6<BR />vendor_id : GenuineIntel<BR />cpu family : 15<BR />model : 4<BR />model name : Intel(R) Xeon(TM) CPU 3.00GHz<BR />stepping : 8<BR />cpu MHz : 2995.051<BR />cache size : 2048 KB<BR />physical id : 3<BR />siblings : 2<BR />core id : 6<BR />cpu cores : 2<BR />fdiv_bug : no<BR />hlt_bug : no<BR />f00f_bug : no<BR />coma_bug : no<BR />fpu : yes<BR />fpu_exception : yes<BR />cpuid level : 5<BR />wp : yes<BR />flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat<BR />pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm pni monitor ds_cpl est<BR />cid xtpr<BR />bogomips : 5983.74<BR /><BR />processor : 7<BR />vendor_id : GenuineIntel<BR />cpu family : 15<BR />model : 4<BR />model name : Intel(R) Xeon(TM) CPU 3.00GHz<BR />stepping : 8<BR />cpu MHz : 2995.051<BR />cache size : 2048 KB<BR />physical id : 3<BR />siblings : 2<BR />core id : 7<BR />cpu cores : 2<BR />fdiv_bug : no<BR />hlt_bug : no<BR />f00f_bug : no<BR />coma_bug : no<BR />fpu : yes<BR />fpu_exception : yes<BR />cpuid level : 5<BR />wp : yes<BR />flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat<BR />pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm pni monitor ds_cpl est<BR />cid xtpr<BR />bogomips : 5984.85<BR /><BR />How many CPUs are physically present in this server. I think its 2 CPUs with Dual core and HT on ???<BR /><BR />Thanks. Mon, 21 May 2007 12:20:01 GMT https://community.hpe.com/t5/operating-system-linux/how-to-find-out-the-number-of-cpus-in-the-server/m-p/4004176#M28410 Adithyan 2007-05-21T12:20:01Z Re: How to find out the number of CPUs in the server https://community.hpe.com/t5/operating-system-linux/how-to-find-out-the-number-of-cpus-in-the-server/m-p/4004177#M28411 What's wrong with counting the different numbers in lines with "physical id :" in the output of `cat /proc/cpuinfo`?<BR />In your post there are 0,1,2,3 - total of 4. Mon, 21 May 2007 12:52:26 GMT https://community.hpe.com/t5/operating-system-linux/how-to-find-out-the-number-of-cpus-in-the-server/m-p/4004177#M28411 Alexander Chuzhoy 2007-05-21T12:52:26Z Re: How to find out the number of CPUs in the server https://community.hpe.com/t5/operating-system-linux/how-to-find-out-the-number-of-cpus-in-the-server/m-p/4004178#M28412 dmesg|grep CPU#<BR /><BR />also does the trick. Tue, 22 May 2007 01:08:49 GMT https://community.hpe.com/t5/operating-system-linux/how-to-find-out-the-number-of-cpus-in-the-server/m-p/4004178#M28412 dirk dierickx 2007-05-22T01:08:49Z Re: How to find out the number of CPUs in the server https://community.hpe.com/t5/operating-system-linux/how-to-find-out-the-number-of-cpus-in-the-server/m-p/4004179#M28413 The "Multi-core and Linux Kernel" paper at<BR /><A href="http://oss.intel.com/pdf/mclinux.pdf" target="_blank">http://oss.intel.com/pdf/mclinux.pdf</A><BR />discusses how to determine multi-core and hyperthreading features from the output of /proc/cpuinfo.<BR />Hyperthreading can be checked both by looking for an 'ht' flag in the 'flags:' line and by looking for a 'siblings:' value greater than the 'cpu cores:' value. Tue, 22 May 2007 15:53:16 GMT https://community.hpe.com/t5/operating-system-linux/how-to-find-out-the-number-of-cpus-in-the-server/m-p/4004179#M28413 Mike Stroyan 2007-05-22T15:53:16Z Re: How to find out the number of CPUs in the server https://community.hpe.com/t5/operating-system-linux/how-to-find-out-the-number-of-cpus-in-the-server/m-p/4004180#M28414 Adityan, <BR /><BR />Do a cat /proc/cpuinfo | grep physical<BR /><BR />This will give the physical ids of the procs if there are 2 CPU's with the same phy id, then u should classify it as one, as 2 logical CPUS share the same id during hyperthreading.<BR /><BR /><BR />Regards,<BR />Pattabhi Raman Wed, 23 May 2007 05:26:44 GMT https://community.hpe.com/t5/operating-system-linux/how-to-find-out-the-number-of-cpus-in-the-server/m-p/4004180#M28414 Pattabhi 2007-05-23T05:26:44Z