Comments on: How Do You Find The Number of CPU Cores on Linux? http://lonesysadmin.net/2008/04/28/how-do-you-find-the-number-of-cpu-cores-on-linux/ im in ur data centrz patchin ur serverz Mon, 13 Oct 2008 02:27:36 +0000 http://wordpress.org/?v=2.6.2 By: Bob Plankers http://lonesysadmin.net/2008/04/28/how-do-you-find-the-number-of-cpu-cores-on-linux/#comment-74098 Bob Plankers Tue, 29 Apr 2008 22:41:21 +0000 http://lonesysadmin.net/?p=1247#comment-74098 Ah, look at that, 'cat /proc/cpuinfo | egrep "physical\ id|core\ id"' does emit information I can use. For whatever reason I was having a tough time wrapping my head around that one. Thanks Andrey! Ah, look at that, ‘cat /proc/cpuinfo | egrep “physical\ id|core\ id”‘ does emit information I can use. For whatever reason I was having a tough time wrapping my head around that one. Thanks Andrey!

]]> By: Andrey Klyachkin http://lonesysadmin.net/2008/04/28/how-do-you-find-the-number-of-cpu-cores-on-linux/#comment-74096 Andrey Klyachkin Tue, 29 Apr 2008 20:01:43 +0000 http://lonesysadmin.net/?p=1247#comment-74096 Bob, it's easy without any Intel's code. Just look at /proc/cpuinfo and you will see: physical id : 0 core id : 1 cpu cores : 2 If you have two CPUs in cpuinfo with the same physical id and core id, than - hallo, hyperthreading! When you have all CPUs with different physical ids, than you have SMP, and when you have CPUs with one physical id and different core ids - you have one multicore CPU. And so on... Bob, it’s easy without any Intel’s code. Just look at /proc/cpuinfo and you will see:
physical id : 0
core id : 1
cpu cores : 2

If you have two CPUs in cpuinfo with the same physical id and core id, than - hallo, hyperthreading! When you have all CPUs with different physical ids, than you have SMP, and when you have CPUs with one physical id and different core ids - you have one multicore CPU. And so on…

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