После обновления ядра, от процессора работает только одна восьмая.
При сборке пакета, с ядром kernel-genkernel-x86_64-4.1.6-gentoo cpupower показывает
|Mperf || Idle_Stats
CPU | C0 | Cx | Freq || POLL | C1 | C2
0| 99.99| 0.01| 3887|| 0.00| 0.00| 0.00
1| 99.99| 0.01| 3888|| 0.00| 0.00| 0.00
2| 99.99| 0.01| 3887|| 0.00| 0.00| 0.00
3| 99.99| 0.01| 3888|| 0.00| 0.00| 0.00
4| 99.99| 0.01| 3887|| 0.00| 0.00| 0.00
5| 98.50| 1.50| 3888|| 0.00| 0.00| 1.48
6| 99.99| 0.01| 3887|| 0.00| 0.00| 0.00
7| 99.99| 0.01| 3887|| 0.00| 0.00| 0.00
А с новым kernel-genkernel-x86_64-4.2.0-gentoo-r1 при сборке того же пакета
|Mperf || Idle_Stats
CPU | C0 | Cx | Freq || POLL | C1 | C2
0| 99.97| 0.03| 3886|| 0.00| 0.00| 0.00
1| 0.00|100.00| 3448|| 0.00| 0.00|100.00
2| 0.00|100.00| 2212|| 0.00| 0.00|100.00
3| 0.01| 99.99| 1770|| 0.00| 0.00| 99.99
4| 0.03| 99.97| 1806|| 0.00| 0.00| 99.97
5| 0.02| 99.98| 1778|| 0.00| 0.00| 99.98
6| 0.02| 99.98| 1822|| 0.00| 0.00| 99.98
7| 0.00|100.00| 1839|| 0.00| 0.00|100.00
В diff .config ядра ничего необычного. Я, обычно, соглашаюсь с умолчаниями.
diff kernel-config-x86_64-4.1.6-gentoo kernel-config-x86_64-4.2.0-gentoo-r1
3c3
< # Linux/x86 4.1.6-gentoo Kernel Configuration
---
> # Linux/x86 4.2.0-gentoo-r1 Kernel Configuration
51d50
< CONFIG_X86_HT=y
100d98
< CONFIG_GENERIC_IRQ_LEGACY_ALLOC_HWIRQ=y
103a102
> CONFIG_IRQ_DOMAIN_HIERARCHY=y
104a104
> CONFIG_GENERIC_MSI_IRQ_DOMAIN=y
145a146
> # CONFIG_RCU_EXPERT is not set
152,155d152
< CONFIG_RCU_FANOUT=64
< CONFIG_RCU_FANOUT_LEAF=16
< # CONFIG_RCU_FANOUT_EXACT is not set
< # CONFIG_RCU_FAST_NO_HZ is not set
157,158d153
< # CONFIG_RCU_BOOST is not set
< CONFIG_RCU_KTHREAD_PRIO=0
270a266
> CONFIG_ARCH_WANTS_DYNAMIC_TASK_STRUCT=y
300a297
> CONFIG_HAVE_COPY_THREAD_TLS=y
320a318
> CONFIG_MODULES_TREE_LOOKUP=y
372,373c370,373
< CONFIG_ARCH_USE_QUEUE_RWLOCK=y
< CONFIG_QUEUE_RWLOCK=y
---
> CONFIG_ARCH_USE_QUEUED_SPINLOCKS=y
> CONFIG_QUEUED_SPINLOCKS=y
> CONFIG_ARCH_USE_QUEUED_RWLOCKS=y
> CONFIG_QUEUED_RWLOCKS=y
499a500
> CONFIG_ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT=y
566a568
> CONFIG_ACPI_REV_OVERRIDE_POSSIBLE=y
590a593
> # CONFIG_ACPI_NFIT is not set
672a676
> CONFIG_PCI_MSI_IRQ_DOMAIN=y
719a724
> CONFIG_NET_INGRESS=y
761c766
< CONFIG_GENEVE=m
---
> CONFIG_GENEVE_CORE=m
811a817
> CONFIG_NETFILTER_INGRESS=y
1093a1100
> # CONFIG_NET_CLS_FLOWER is not set
1163a1171
> CONFIG_BT_RTL=m
1165a1174
> CONFIG_BT_HCIBTUSB_RTL=y
1217a1227
> CONFIG_MAC80211_STA_HASH_MAX_SIZE=0
1271a1282
> # CONFIG_OF is not set
1309d1319
< # CONFIG_BLK_DEV_PMEM is not set
1374a1385,1389
> # CONFIG_SCIF_BUS is not set
1383a1403
> # CONFIG_CXL_KERNEL_API is not set
1456a1477
> # CONFIG_SCSI_SNIC is not set
1645a1667
> CONFIG_GENEVE=m
1649a1672
> # CONFIG_TUN_VNET_CROSS_LE is not set
1676a1700
> # CONFIG_VHOST_CROSS_ENDIAN_LEGACY is not set
1718a1743,1747
> CONFIG_NET_VENDOR_CAVIUM=y
> # CONFIG_THUNDER_NIC_PF is not set
> # CONFIG_THUNDER_NIC_VF is not set
> # CONFIG_THUNDER_NIC_BGX is not set
> # CONFIG_LIQUIDIO is not set
1747a1777
> CONFIG_NET_VENDOR_EZCHIP=y
1816a1847
> CONFIG_NET_VENDOR_RENESAS=y
1876a1908
> # CONFIG_DP83867_PHY is not set
2052a2085
> # CONFIG_WL_MEDIATEK is not set
2072a2106
> CONFIG_INPUT_LEDS=m
2202a2237
> # CONFIG_TOUCHSCREEN_WDT87XX_I2C is not set
2259a2295
> # CONFIG_INPUT_DRV2665_HAPTICS is not set
2547a2584
> # CONFIG_CHARGER_BQ24257 is not set
2548a2586
> # CONFIG_CHARGER_BQ25890 is not set
2550a2589
> # CONFIG_CHARGER_RT9455 is not set
2583a2623
> # CONFIG_SENSORS_DELL_SMM is not set
2675a2716
> # CONFIG_SENSORS_TC74 is not set
2701a2743
> # CONFIG_THERMAL_WRITABLE_TRIPS is not set
2704a2747
> # CONFIG_THERMAL_DEFAULT_GOV_POWER_ALLOCATOR is not set
2708a2752
> # CONFIG_THERMAL_GOV_POWER_ALLOCATOR is not set
2711a2756
> CONFIG_INTEL_SOC_DTS_IOSF_CORE=m
2729a2775
> # CONFIG_MAX63XX_WATCHDOG is not set
3093a3140
> # CONFIG_VIDEO_DT3155 is not set
3302a3350
> CONFIG_DVB_CX24120=m
3403a3452
> # CONFIG_DRM_AMDGPU is not set
3417a3467
> # CONFIG_DRM_VIRTIO_GPU is not set
3546a3597
> CONFIG_SND_PROC_FS=y
3551d3601
< CONFIG_SND_KCTL_JACK=y
3643d3692
< CONFIG_SND_HDA_PREALLOC_SIZE=64
3647d3695
< # CONFIG_SND_HDA_INPUT_JACK is not set
3663a3712
> CONFIG_SND_HDA_PREALLOC_SIZE=64
3799a3849
> # CONFIG_USB_ULPI_BUS is not set
4012a4063
> # CONFIG_MMC_MTK is not set
4040a4092
> # CONFIG_LEDS_TLC591XX is not set
4080d4131
< # CONFIG_MLX5_INFINIBAND is not set
4088a4140,4141
> CONFIG_EDAC_ATOMIC_SCRUB=y
> CONFIG_EDAC_SUPPORT=y
4093d4145
< CONFIG_RTC_SYSTOHC=y
4094a4147,4148
> CONFIG_RTC_SYSTOHC=y
> CONFIG_RTC_SYSTOHC_DEVICE="rtc0"
4161d4214
< # CONFIG_RTC_DRV_XGENE is not set
4202a4256
> # CONFIG_UIO_PRUSS is not set
4230a4285
> # CONFIG_DELL_RBTN is not set
4264a4320
> # CONFIG_INTEL_PMC_IPC is not set
4307a4364
> # CONFIG_SUNXI_SRAM is not set
4339a4397,4398
> # CONFIG_STK8312 is not set
> # CONFIG_STK8BA50 is not set
4370a4430
> # CONFIG_M62332 is not set
4409a4470
> # CONFIG_ACPI_ALS is not set
4412a4474
> # CONFIG_BH1750 is not set
4422a4485
> # CONFIG_STK3310 is not set
4435a4499
> # CONFIG_MMC35240 is not set
4436a4501
> # CONFIG_BMC150_MAGN is not set
4481a4547,4548
> # CONFIG_PHY_PXA_28NM_HSIC is not set
> # CONFIG_PHY_PXA_28NM_USB2 is not set
4491a4559,4563
> CONFIG_LIBNVDIMM=y
> # CONFIG_BLK_DEV_PMEM is not set
> CONFIG_ND_BLK=y
> CONFIG_ND_BTT=y
> CONFIG_BTT=y
4510a4583
> CONFIG_EFI_ESRT=y
4633a4707
> # CONFIG_PROC_CHILDREN is not set
4717,4718c4791
< CONFIG_SUNRPC_XPRT_RDMA_CLIENT=m
< CONFIG_SUNRPC_XPRT_RDMA_SERVER=m
---
> CONFIG_SUNRPC_XPRT_RDMA=m
4729a4803
> # CONFIG_CIFS_SMB311 is not set
4842d4915
< CONFIG_KASAN_SHADOW_OFFSET=0xdffffc0000000000
4861a4935
> CONFIG_SCHED_INFO=y
4899a4974
> # CONFIG_RCU_EQS_DEBUG is not set
4997a5073
> # CONFIG_DEBUG_ENTRY is not set
4999a5076,5077
> CONFIG_X86_DEBUG_FPU=y
> # CONFIG_PUNIT_ATOM_DEBUG is not set
5059a5138
> CONFIG_CRYPTO_RNG_DEFAULT=m
5061a5141,5143
> CONFIG_CRYPTO_AKCIPHER2=y
> CONFIG_CRYPTO_AKCIPHER=m
> CONFIG_CRYPTO_RSA=m
5081a5164
> # CONFIG_CRYPTO_CHACHA20POLY1305 is not set
5082a5166
> CONFIG_CRYPTO_ECHAINIV=m
5112a5197
> # CONFIG_CRYPTO_POLY1305 is not set
5156a5242
> # CONFIG_CRYPTO_CHACHA20 is not set
5174a5261
> # CONFIG_CRYPTO_842 is not set
5182c5269,5274
< # CONFIG_CRYPTO_DRBG_MENU is not set
---
> CONFIG_CRYPTO_DRBG_MENU=m
> CONFIG_CRYPTO_DRBG_HMAC=y
> # CONFIG_CRYPTO_DRBG_HASH is not set
> # CONFIG_CRYPTO_DRBG_CTR is not set
> CONFIG_CRYPTO_DRBG=m
> CONFIG_CRYPTO_JITTERENTROPY=m
5186a5279
> # CONFIG_CRYPTO_USER_API_AEAD is not set
5234a5328
> CONFIG_PERCPU_RWSEM=y
5302a5397
> CONFIG_ARCH_HAS_PMEM_API=y
Старое ядро config-4.1.6 Новое — config-4.2.0-r1
