In the 80386 microprocessor and later, virtual 8086 mode (also called virtual real mode, V86-mode or VM86) allows the execution of real mode applications that are incapable of running directly in protected mode while the processor is running a protected mode operating system. Typical operations are addition, subtraction, multiplication, division, square root, and bitshifting. designed to carry out operations on floating point numbers. In our case the following flags are mentioned: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx rdtscp lm constant_tsc rep_good nopl xtopology nonstop_tsc pni pclmulqdq ssse3 cx16 sse4_1 sse4_2 x2apic movbe popcnt aes xsave avx rdrand hypervisor lahf_lm abm 3dnowprefetch rdseed clflushopt. Model name : Intel(R) Core(TM) i5-6267U CPU 2.90GHzįlags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx rdtscp lm constant_tsc rep_good nopl xtopology nonstop_tsc pni pclmulqdq ssse3 cx16 sse4_1 sse4_2 x2apic movbe popcnt aes xsave avx rdrand hypervisor lahf_lm abm 3dnowprefetch rdseed clflushoptĪddress sizes : 39 bits physical, 48 bits virtualĪs you can see, a lot of flags are mentioned, those might be interesting to understand the capabilities of your processor in more detail. The first place to look for more information on the CPU is /proc/cpuinfo which might give a wealth of additional information.īelow is an example of the content of my /proc/cpuinfo (running Oracle Linux in a Virtualbox image on a MacBook Pro): However, in some cases, especially when doing lower level development work or doing more advanced Oracle Linux system tuning it is good to have a bit more insight into your physical CPU. Commonly the only question is, how fast is that CPU handling my code. Most people using Linux take the CPU they have for granted.
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