cpuid(4) Device Drivers Manual cpuid(4) cpuid - CPUID x86 CPUID x86. CPUID lseek(2) pread(2); 16 . . 32 %eax, 32 %ecx, "" eax, eax=4. /dev/cpu/CPUNUM/cpuid, CPUNUM , CPUNUM , /proc/cpuinfo. root root. CPUID . . cpuid /proc/cpuinfo /sys/devices/system/cpu. CPUID . cpuid . , : $ modprobe cpuid CPUID . Early i486 CPUs do not support the CPUID instruction; opening this device for those CPUs fails with EIO. . cpuid(1) Intel Corporation, Intel 64 and IA-32 Architectures Software Developer's Manual Volume 2A: Instruction Set Reference, A-M, 3-180 CPUID reference. Intel Corporation, Intel Processor Identification and the CPUID Instruction, Application note 485. Azamat Hackimov , Dmitriy S. Seregin , Dmitry Bolkhovskikh , Katrin Kutepova , Yuri Kozlov ; GNU 3 , . . , , . Linux man-pages 6.06 5 2024 . cpuid(4)