In the next section, we’ll look at some of the important flags that can help us understand what our CPU can do. 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. r-r-r- 1 root root 0 Jul 13 00:18 zoneinfo r-r-r- 1 root root 0 Jul 13 00:18 vmstat if the CPU supports a pdpe1gb flag then it supports 1GB Huge pages, so it is a CPU question not a networking one, if Dell/customer look at /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 r-r-r- 1 root root 0 Jul 13 00:18 consoles 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. Note: VSI nodes are to vmkernel what proc nodes are. So, they’re kind of lenses through which we can peek at the running Linux kernel. Other than non-interactive modes get and set commands, this tool offers abbreviated command options only. The output is similar to: vmware -v VMware ESX Server 3i 3.5. You can also determine this information using the command vim-cmd hostsvc/hosthardware. However, this file does not exist on ESXi hosts.
By reading virtual files, we can see what the Linux kernel is doing at the moment. On an ESX host, you can check cpuinfo by looking at the flags line in the /proc/cpuinfo file. If the hosts are identical, you either need to tap into the VMWare API, or use the suggestion from Stack Overflow, which involves disabling a VMWare security setting and establishing a unique identifier for the host.A virtual file is a special type of file available on Linux-based operating systems. Overriding the automatic selection can provide better performance for some use cases. ESXi makes this determination based on the processor type and the virtual machine.
At that point, something like the suggestions above would work. ESXi can determine whether a virtual machine needs hardware support for virtualization. If the goal is to tell the difference between host servers, this would be very easy if the CPU's are different. Outside of that, host CPU information is visible in the vSphere client.Īt the ESXi host level, esxcfg-info -w provides hardware information, including CPU specs. In Windows, this is available in the System Control Panel.If Linux, dmidecode and cat /proc/cpuinfo will display some of the host CPU specification.With EVC, you can be sure that the CPU capabilities of each host are consistent (or at least a common subset of the available features).ĬPU information is also available within the guest operating system. See the descriptions of the Enhanced vMotion Compatibility (EVC) function within VMWare. There has to be a baseline of CPU compatibility in an existing vMotion arrangement. What specific information are you seeking?
0 kommentar(er)
