![]() Beispiel cat /proc/cpuinfo processor : 0 vendorid : AuthenticAMD cpu family : 16 model : 4 model name : AMD Phenom(tm) II X4 B95 Processor stepping : 2 cpu MHz : 800. ![]() Hyperthreaded (virtual) cores would not be included (at least to my mind). The number of 'cores' would be physical cores. The number of 'processors' would be the physical number installed in sockets on the machine. In the next section, we’ll look at some of the important flags that can help us understand what our CPU can do. Die Datei /proc/cpuinfo enthält Details zu den im Server verbauten Prozessoren. When someone asks for 'the number of processors/cores' there are 2 answers being requested. Vmx flags : vnmi preemption_timer invvpid ept_x_only ept_ad ept_1gb flexpriority tsc_offset vtpr mtf vapic ept vpid unrestricted_guest ple pmlīugs : cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs itlb_multihit srbdsĪddress sizes : 39 bits physical, 48 bits virtualĪs we can see, it prints our CPU’s specification containing the flags field. Model name : Intel(R) Celeron(R) CPU G3900 2.80GHzįlags : 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 pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 sdbg cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave rdrand lahf_lm abm 3dnowprefetch cpuid_fault epb invpcid_single pti ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust erms invpcid rdseed smap clflushopt intel_pt xsaveopt xsavec xgetbv1 xsaves dtherm arat pln pts hwp hwp_notify hwp_act_window hwp_epp md_clear flush_l1d We’ll use the cat command to read the file: # cat /proc/cpuinfo processor : 0 The /proc /cpuinfo virtual file contains information about the CPUs currently available in our system’s motherboard. The command will list many files, but we’re only interested in the cpuinfo file, which happens to be inside the base directory. For example, the /proc/uptime file gives you. Again, I'm not stating that other files don't have value, but these are the ones I've found that have the most value to me. And the most valuable of those are cpuinfo and meminfo. r-r-r- 1 root root 0 Jul 13 00:18 zoneinfo The /proc files I find most valuable, especially for inherited system discovery, are: cmdline. Dump the flags which denote we have detected and/or have applied bug workarounds to the CPU were executing on, in a similar manner to the feature flags. r-r-r- 1 root root 0 Jul 13 00:18 vmstat The intent of the bugs field in /proc/cpuinfo is described in the commit message which introduced it: x86/cpufeature: Add bug flags to /proc/cpuinfo. r-r-r- 1 root root 0 Jul 13 00:18 filesystemsĭr-xr-xr-x 5 root root 0 Jul 13 00:18 fs/ r-r-r- 1 root root 0 Jul 13 00:18 diskstats r-r-r- 1 root root 0 Jul 13 00:14 devices r-r-r- 1 root root 0 Jul 13 00:14 cpuinfo Alternatively, it can print out in parsable. It will display information like: CPU family, model and stepping. r-r-r- 1 root root 0 Jul 13 00:18 consoles You can use the /proc/cpuinfo file or use the lscpu command to get info about CPU architecture. r-r-r- 1 root root 56K Jul 13 00:18 config.gz cat /proc/cpuinfo processor : 0 vendorid : AuthenticAMD cpu family : 15 model : 47 model name : AMD Athlon(tm) 64 Processor 3200+. Let’s see what’s inside the /proc directory: # ls -halF /proc total 4.0K We might need root access to read some of the virtual files. On most Linux distributions, virtual files are located in the /proc directory. Unlike a regular file, virtual files don’t take space on the disk and are only created when we read them. So, they’re kind of lenses through which we can peek at the running Linux kernel. For example a processor with 2 cores and hyperthreading would be reported as a processor with 4 cores. ![]() Here is the end of the output of the command cat /proc/cpuinfo: processor : 3 vendorid : GenuineIntel cpu family : 6 model : 37 model name : Intel (R) Core (TM) i3 CPU M 330 2.13GHz stepping : 2 cpu MHz : 933.000 cache size : 3072 KB physical id : 0 siblings : 4 core id. But you can filter the results to get the relevantinfo. I was looking at my processor SPECS on my Ubuntu Linux 11.10 system. By reading virtual files, we can see what the Linux kernel is doing at the moment. cat /proc/cpuinfo grep processor wc -l 4 The number of processors shown by /proc/cpuinfo might not be the actual number of cores on the processor. cat /proc/cpuinfo It gets you info related to individual cores making it too long to read. So as per above output, Server’s CPU is of 64 bit.Īpart from /proc/cpuinfo, we can also check the CPU architecture using lscpu command, in the output look for CPU op-modes(s).A virtual file is a special type of file available on Linux-based operating systems.
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