About the unsupported instruction set SSE 4.2 of CPU in virtualization

background ：

There are two servers in the LAN proxmox Virtualized , Run some test applications . I just want to install it today clickhouse Run . Preparation before installation ：

Test whether the server supports sse 4.2 Instruction set ...... as follows

[[email protected] app]# grep -q sse4_2 /proc/cpuinfo && echo "SSE 4.2 supported" || echo "SSE 4.2 not supported“"
SSE 4.2 not supported“

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Suddenly I panicked , My server cpu yes intel Of How can I not support sse 4.2 Well ？

solve the problem ：

1. land proxmox The host checks whether the host supports sse4.2

[email protected]:/etc/pve/qemu-server# grep -q sse4_2 /proc/cpuinfo && echo "SSE 4.2 supported" || echo "SSE 4.2 not supported“"
SSE 4.2 supported

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2. land proxmox web The console is used to view the time when virtualization is created cpu To configure ：

Click the corresponding virtual machine - Hardware - processor - edit

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Looked at the cpu There's a category ？

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There are many options in the drop-down Include AMD and intel The architecture of Yes, of course The default is kvm64. Will the problem arise here ？

3. Omnipotent Baidu （ still google well ... All know ）

Baidu search proxmox sse4.2

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There are similar problems in both articles , The proposed solution is to modify cpu Of mode by host-model:

Try to modify it cpu The type is host：

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4. Verify success

Restart the virtual machine and log in to verify ：

[[email protected] ~]# grep -q sse4_2 /proc/cpuinfo && echo "SSE 4.2 supported" || echo "SSE 4.2 not supported“"
SSE 4.2 supported

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Postscript ：

1. Some thoughts about instruction set
2. The various types of virtualization are different
3. The arrangement of fragmented knowledge and the idea of solving problems