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当前 CPU 速度低于最低速度？

tag-icon • tag-icon cpu cpu-frequency
当前 CPU 速度低于最低速度？

我当前的CPU速度（1253.029MHZ）低于最低（1400MHZ）？这是一台新电脑，有什么问题吗？

Architecture:                    x86_64
CPU op-mode(s):                  32-bit, 64-bit
Byte Order:                      Little Endian
Address sizes:                   43 bits physical, 48 bits virtual
CPU(s):                          4
On-line CPU(s) list:             0-3
Thread(s) per core:              1
Core(s) per socket:              4
Socket(s):                       1
NUMA node(s):                    1
Vendor ID:                       AuthenticAMD
CPU family:                      23
Model:                           24
Model name:                      AMD Ryzen 3 3200G with Radeon Vega Graphics
Stepping:                        1
Frequency boost:                 enabled
CPU MHz:                         1253.029
CPU max MHz:                     3600,0000
CPU min MHz:                     1400,0000
BogoMIPS:                        7186.89
Virtualization:                  AMD-V
L1d cache:                       128 KiB
L1i cache:                       256 KiB
L2 cache:                        2 MiB
L3 cache:                        4 MiB
NUMA node0 CPU(s):               0-3
Vulnerability Itlb multihit:     Not affected
Vulnerability L1tf:              Not affected
Vulnerability Mds:               Not affected
Vulnerability Meltdown:          Not affected
Vulnerability Spec store bypass: Mitigation; Speculative Store Bypass disabled v
                                 ia prctl and seccomp
Vulnerability Spectre v1:        Mitigation; usercopy/swapgs barriers and __user
                                  pointer sanitization
Vulnerability Spectre v2:        Mitigation; Full AMD retpoline, IBPB conditiona
                                 l, STIBP disabled, RSB filling
Vulnerability Srbds:             Not affected
Vulnerability Tsx async abort:   Not affected
Flags:                           fpu vme de pse tsc msr pae mce cx8 apic sep mtr
                                 r pge mca cmov pat pse36 clflush mmx fxsr sse s
                                 se2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtsc
                                 p lm constant_tsc rep_good nopl nonstop_tsc cpu
                                 id extd_apicid aperfmperf pni pclmulqdq monitor
                                  ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes 
                                 xsave avx f16c rdrand lahf_lm cmp_legacy svm ex
                                 tapic cr8_legacy abm sse4a misalignsse 3dnowpre
                                 fetch osvw skinit wdt tce topoext perfctr_core 
                                 perfctr_nb bpext perfctr_llc mwaitx cpb hw_psta
                                 te sme ssbd sev ibpb vmmcall fsgsbase bmi1 avx2
                                  smep bmi2 rdseed adx smap clflushopt sha_ni xs
                                 aveopt xsavec xgetbv1 xsaves clzero irperf xsav
                                 eerptr arat npt lbrv svm_lock nrip_save tsc_sca
                                 le vmcb_clean flushbyasid decodeassists pausefi
                                 lter pfthreshold avic v_vmsave_vmload vgif over
                                 flow_recov succor smca

答案1

是否有问题不能通过lscpu的输出来判断。我从未见过当前频率比最低频率低很多，但考虑到 CPU 的复杂程度，这也不足为奇。电源调节器可以通过 ACPI 状态增加以获得额外的性能，或者减少或节流时钟以单独减少每个 CPU 内核的功耗和热量。它还可以在 CPU 可以跳过心跳的地方插入 STOPCLOCK。 AMD 拥有 Cool'n'Quiet 和 PowerNow！这会影响电压和频率。主板有影响，甚至电源也有影响。但尤其要注意 CPU 核心的温度。

Linux 通过 /sys 接口公开有关频率的详细信息。 lscpu 使用这些进行总结。但如果您怀疑有问题，请直接查看内核参数，特别是当系统处于负载状态时。

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