I understand that (%CPU)  logicalcores*(1+) (where  is measure and rounding error). But, how can I have on a 2 core system 2 different processes, each taking 200% of CPU (as measured by htop)?EDIT Cores in above equation means logical cores i.e. taking into account all hyperthreading,  number of CPUs etc.EDIT 2 Despite htop displays the number of processors I attach cpuinfoprocessor   : 0vendor_id   : GenuineIntelcpu family  : 6model       : 23model name  : Intel(R) Core(TM)2 Duo CPU     T9600  @ 2.80GHzstepping    : 10cpu MHz     : 800.000cache size  : 6144 KBphysical id : 0siblings    : 2core id     : 0cpu cores   : 2apicid      : 0initial apicid  : 0fpu     : yesfpu_exception   : yescpuid level : 13wp      : yesflags       : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good aperfmperf pni dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm sse4_1 xsave lahf_lm ida dts tpr_shadow vnmi flexprioritybogomips    : 5585.20clflush size    : 64cache_alignment : 64address sizes   : 36 bits physical, 48 bits virtualpower management:processor   : 1vendor_id   : GenuineIntelcpu family  : 6model       : 23model name  : Intel(R) Core(TM)2 Duo CPU     T9600  @ 2.80GHzstepping    : 10cpu MHz     : 800.000cache size  : 6144 KBphysical id : 0siblings    : 2core id     : 1cpu cores   : 2apicid      : 1initial apicid  : 1fpu     : yesfpu_exception   : yescpuid level : 13wp      : yesflags       : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good aperfmperf pni dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm sse4_1 xsave lahf_lm ida dts tpr_shadow vnmi flexprioritybogomips    : 5586.38clflush size    : 64cache_alignment : 64address sizes   : 36 bits physical, 48 bits virtualpower management:
How can I have 400% CPU occupied on 2 cores
linux;cpu;hyperthreading