hello. Under 5.x, you do: # cd /dev # ./MAKEDEV cpuctl # cpuctl identify 0 As in: mirkwood# cd /dev mirkwood# ./MAKEDEV cpuctl mirkwood# cpuctl identify 0 cpu0: Intel Pentium 4 (686-class), 1694.96 MHz, id 0xf12 cpu0: features 0x3febfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR> cpu0: features 0x3febfbff<PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX> cpu0: features 0x3febfbff<FXSR,SSE,SSE2,SS,HTT,TM> cpu0: "Intel(R) Pentium(R) 4 CPU 1.70GHz" cpu0: I-cache 12K uOp cache 8-way, D-cache 8KB 64B/line 4-way cpu0: L2 cache 256KB 64B/line 8-way cpu0: ITLB 4K/4M: 64 entries cpu0: DTLB 4K/4M: 64 entries cpu0: Initial APIC ID 0 cpu0: Cluster/Package ID 0 cpu0: family 0f model 01 extfamily 00 extmodel 00 mirkwood# exit