我有一台搭载 Core i5-8300h 的 HP 笔记本电脑，在启动几分钟后，它几乎不使用全核加速。当我运行单线程任务时，它保持 3.5-4 GHz 的频率，但当我在所有核心上运行任何内容时，时钟频率会下降到接近基本频率 2.3 GHz（运行在 1.7-2.5Ghz）。启动后的前几分钟，如果加载，所有核心都会以 3.9 GHz 的完整多核加速频率运行。这不可能是热问题，因为温度降至约 55°C，风扇几乎无声（比单核负载下安静得多）。
该问题在 18.04 和原始 20.04 中出现，在 20.04 分支中进行一些更新后消失（笔记本电脑将在所有核心上保持 3.9 GHz 涡轮），现在在 22.04 和 22.10 中再次出现（我尝试了各种 DE 版本）。在 Windows 下，在非 SIMD 工作负载期间，完整的多核涡轮可以无限期地维持。
切换调节器没有区别。我尝试过禁用 intel_pstate、打开或关闭 thermald、节流和 auto-cpufreq 自定义守护进程，但都无济于事。
更新：涡轮增压器输出
turbostat version 2022.04.16 - Len Brown <[email protected]>
CPUID(0): GenuineIntel 0x16 CPUID levels
CPUID(1): family:model:stepping 0x6:9e:a (6:158:10) microcode 0xf0
CPUID(0x80000000): max_extended_levels: 0x80000008
CPUID(1): SSE3 MONITOR - EIST TM2 TSC MSR ACPI-TM HT TM
CPUID(6): APERF, TURBO, DTS, PTM, HWP, HWPnotify, HWPwindow, HWPepp, No-HWPpkg, EPB
cpu1: MSR_IA32_MISC_ENABLE: 0x00850089 (TCC EIST MWAIT PREFETCH TURBO)
CPUID(7): SGX
cpu1: MSR_IA32_FEATURE_CONTROL: 0x00020005 (Locked )
CPUID(0x15): eax_crystal: 2 ebx_tsc: 192 ecx_crystal_hz: 0
TSC: 2304 MHz (24000000 Hz * 192 / 2 / 1000000)
CPUID(0x16): base_mhz: 2300 max_mhz: 4000 bus_mhz: 100
cpu1: MSR_MISC_PWR_MGMT: 0x00401cc0 (ENable-EIST_Coordination DISable-EPB DISable-OOB)
RAPL: 5825 sec. Joule Counter Range, at 45 Watts
cpu1: MSR_PLATFORM_INFO: 0x8083bf1011700
8 * 100.0 = 800.0 MHz max efficiency frequency
23 * 100.0 = 2300.0 MHz base frequency
cpu1: MSR_IA32_POWER_CTL: 0x002c005d (C1E auto-promotion: DISabled)
cpu1: MSR_TURBO_RATIO_LIMIT: 0x272727282828
39 * 100.0 = 3900.0 MHz max turbo 6 active cores
39 * 100.0 = 3900.0 MHz max turbo 5 active cores
39 * 100.0 = 3900.0 MHz max turbo 4 active cores
40 * 100.0 = 4000.0 MHz max turbo 3 active cores
40 * 100.0 = 4000.0 MHz max turbo 2 active cores
40 * 100.0 = 4000.0 MHz max turbo 1 active cores
cpu1: MSR_CONFIG_TDP_NOMINAL: 0x00000017 (base_ratio=23)
cpu1: MSR_CONFIG_TDP_LEVEL_1: 0x00120118 (PKG_MIN_PWR_LVL1=0 PKG_MAX_PWR_LVL1=0 LVL1_RATIO=18 PKG_TDP_LVL1=280)
cpu1: MSR_CONFIG_TDP_LEVEL_2: 0x00000000 ()
cpu1: MSR_CONFIG_TDP_CONTROL: 0x00000000 ( lock=0)
cpu1: MSR_TURBO_ACTIVATION_RATIO: 0x00000016 (MAX_NON_TURBO_RATIO=22 lock=0)
cpu1: MSR_PKG_CST_CONFIG_CONTROL: 0x1e008008 (UNdemote-C3, UNdemote-C1, demote-C3, demote-C1, locked, pkg-cstate-limit=8 (unlimited))
/dev/cpu_dma_latency: 16000 usec (constrained)
current_driver: intel_idle
current_governor: menu
current_governor_ro: menu
cpu1: POLL: CPUIDLE CORE POLL IDLE
cpu1: C1: MWAIT 0x00
cpu1: C1E: MWAIT 0x01
cpu1: C3: MWAIT 0x10
cpu1: C6: MWAIT 0x20
cpu1: C7s: MWAIT 0x33
cpu1: C8: MWAIT 0x40
cpu1: C9: MWAIT 0x50
cpu1: C10: MWAIT 0x60
cpu1: cpufreq driver: intel_pstate
cpu1: cpufreq governor: powersave
cpufreq intel_pstate no_turbo: 0
cpu1: MSR_MISC_FEATURE_CONTROL: 0x00000000 (L2-Prefetch L2-Prefetch-pair L1-Prefetch L1-IP-Prefetch)
cpu0: MSR_PM_ENABLE: 0x00000001 (HWP)
cpu0: MSR_HWP_CAPABILITIES: 0x01091728 (high 40 guar 23 eff 9 low 1)
cpu0: MSR_HWP_REQUEST: 0x00002808 (min 8 max 40 des 0 epp 0x0 window 0x0 pkg 0x0)
cpu0: MSR_HWP_INTERRUPT: 0x00000001 (EN_Guaranteed_Perf_Change, Dis_Excursion_Min)
cpu0: MSR_HWP_STATUS: 0x00000000 (No-Guaranteed_Perf_Change, No-Excursion_Min)
cpu0: EPB: 0 (performance)
cpu0: MSR_RAPL_POWER_UNIT: 0x000a0e03 (0.125000 Watts, 0.000061 Joules, 0.000977 sec.)
cpu0: MSR_PKG_POWER_INFO: 0x00000168 (45 W TDP, RAPL 0 - 0 W, 0.000000 sec.)
cpu0: MSR_PKG_POWER_LIMIT: 0x420270001e8640 (UNlocked)
cpu0: PKG Limit #1: ENabled (200.000 Watts, 32.000000 sec, clamp DISabled)
cpu0: PKG Limit #2: DISabled (78.000 Watts, 0.002441* sec, clamp DISabled)
cpu0: MSR_VR_CURRENT_CONFIG: 0x00000348
cpu0: PKG Limit #4: 105.000000 Watts (UNlocked)
cpu0: MSR_DRAM_POWER_LIMIT: 0x5400de00000000 (UNlocked)
cpu0: DRAM Limit: DISabled (0.000 Watts, 0.000977 sec, clamp DISabled)
cpu0: MSR_PP0_POLICY: 0
cpu0: MSR_PP0_POWER_LIMIT: 0x00000000 (UNlocked)
cpu0: Cores Limit: DISabled (0.000 Watts, 0.000977 sec, clamp DISabled)
cpu0: MSR_PP1_POLICY: 0
cpu0: MSR_PP1_POWER_LIMIT: 0x00000000 (UNlocked)
cpu0: GFX Limit: DISabled (0.000 Watts, 0.000977 sec, clamp DISabled)
cpu0: MSR_IA32_TEMPERATURE_TARGET: 0x05640000 (95 C) (100 default - 5 offset)
cpu0: MSR_IA32_PACKAGE_THERM_STATUS: 0x88310c08 (51 C)
cpu0: MSR_IA32_PACKAGE_THERM_INTERRUPT: 0x00000003 (100 C, 100 C)
cpu1: MSR_PKGC3_IRTL: 0x0000884e (valid, 79872 ns)
cpu1: MSR_PKGC6_IRTL: 0x00008876 (valid, 120832 ns)
cpu1: MSR_PKGC7_IRTL: 0x00008894 (valid, 151552 ns)
cpu1: MSR_PKGC8_IRTL: 0x000088fa (valid, 256000 ns)
cpu1: MSR_PKGC9_IRTL: 0x0000894c (valid, 339968 ns)
cpu1: MSR_PKGC10_IRTL: 0x00008bf2 (valid, 1034240 ns)
更新 2：我运行 turbostat 并逐渐增加繁忙核心的数量（输出如下）。真正引起我注意的是，尽管 CPU 的 TDP 为 45W，但 PkgWatt 却在 15 瓦时就达到了极限。
Busy% Bzy_MHz IRQ PkgTmp PkgWatt CorWatt GFXWatt RAMWatt
0.58 3885 1064 43 2.01 0.67 0.03 0.54
0.84 3864 1886 43 2.53 1.05 0.14 0.60
0.57 3908 1190 43 2.05 0.68 0.05 0.55
7.62 3843 3330 58 9.04 7.40 0.27 0.67
13.04 3929 2909 62 14.22 12.87 0.03 0.53
13.04 3930 2726 63 14.22 12.89 0.02 0.53
13.02 3934 2689 63 14.23 12.88 0.03 0.53
13.02 3933 2606 62 14.20 12.86 0.03 0.53
13.24 3902 2861 59 14.25 12.89 0.05 0.54
22.98 3372 4764 58 14.82 13.30 0.17 0.61
25.44 3346 4029 57 14.96 13.63 0.02 0.53
25.42 3349 4044 58 14.96 13.63 0.02 0.53
25.40 3351 3886 58 14.96 13.63 0.02 0.53
30.53 3087 5929 54 14.96 13.40 0.20 0.63
37.88 2909 5572 52 14.96 13.63 0.02 0.53
37.80 2913 5397 53 14.96 13.63 0.02 0.53
37.81 2909 5309 52 14.96 13.63 0.02 0.53
42.84 2710 7427 51 14.95 13.40 0.19 0.63
50.53 2562 7191 51 14.98 13.64 0.02 0.53
50.57 2558 7388 52 14.96 13.63 0.02 0.53
50.58 2554 7251 52 14.96 13.63 0.02 0.53
50.86 2544 7542 52 14.96 13.62 0.02 0.53
56.26 2489 9034 53 14.96 13.42 0.18 0.62
63.43 2506 9970 53 14.96 13.61 0.02 0.54
62.99 2514 8526 53 14.96 13.61 0.02 0.53
62.90 2513 8688 54 14.96 13.61 0.02 0.53
72.34 2434 10175 54 14.96 13.41 0.18 0.62
75.43 2461 9689 54 14.96 13.60 0.02 0.53
75.41 2463 9651 54 14.96 13.60 0.02 0.53
75.35 2461 9635 54 14.96 13.61 0.02 0.53
79.21 2401 10834 54 14.96 13.40 0.18 0.62
87.83 2400 10601 55 14.96 13.60 0.02 0.53
87.51 2408 10517 55 14.96 13.61 0.02 0.53
87.64 2409 10582 56 14.96 13.61 0.02 0.53
90.13 2356 11453 56 14.96 13.41 0.18 0.62
99.59 2374 10697 56 14.96 13.60 0.02 0.53
99.62 2377 10485 56 14.96 13.61 0.02 0.53
99.62 2375 10520 56 14.96 13.60 0.02 0.53
99.64 2377 10429 56 14.96 13.60 0.02 0.53