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archenroot
Apprentice
Joined: 13 Dec 2011
Posts: 218
Location: Lake Macha, Czech republic
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 Posted: Thu Oct 25, 2018 9:44 am Post subject: [S] CPU frequency goes under min frequency |
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Hi,
I did fresh install on Dell XPS 9550. As I wanted to save some baterry I followed Power Management guide from Gentoo/Arch, actually I installed following tools as auto started daemons:
But thing is that my CPU frequency started dropping under the min limit  as bellow (I have seen <400Mhz.. lol):
| Code: | zangetsu@venus ~/proj/uae-graphaware/repos/tmp/jukebox $ lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 8
On-line CPU(s) list: 0-7
Thread(s) per core: 2
Core(s) per socket: 4
Socket(s): 1
Vendor ID: GenuineIntel
CPU family: 6
Model: 94
Model name: Intel(R) Core(TM) i7-6700HQ CPU @ 2.60GHz
Stepping: 3
CPU MHz: 682.789
CPU max MHz: 3500.0000
CPU min MHz: 800.0000
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I stopped both daemons and installed cpupower and set to performance (in kernel I have also config perfromance as default). Is there anything else what could cause dropping the frequency so low (I sow < 400 lol). Thing is this is development machine and all things gets very slow.
My current service set is:
| Code: | zangetsu@venus ~/proj/uae-graphaware/repos/tmp/jukebox $ sudo rc-update
NetworkManager | default
acpid | default
alsasound | boot
binfmt | boot
bootmisc | boot
bumblebee | default
cgroups | sysinit
consolekit | boot default
dbus | default
devfs | sysinit
dmesg | sysinit
fsck | boot
hostname | boot
hwclock | boot
keymaps | boot
killprocs | shutdown
kmod-static-nodes | sysinit
local | default nonetwork
localmount | boot
loopback | boot
lvm | default
modules | boot
mount-ro | shutdown
mtab | boot
netmount | default
ntp-client | default
procfs | boot
root | boot
savecache | shutdown
sshd | default
swap | boot
sysctl | boot
sysfs | sysinit
syslog-ng | default
termencoding | boot
thermald | default
udev | sysinit
udev-trigger | sysinit
urandom | boot
xdm | default |
Kernel:
Modules loaded:
| Code: | zangetsu@venus ~/proj/uae-graphaware/repos/tmp/jukebox $ sudo lsmod
Module Size Used by
msr 16384 0
dell_wmi 16384 0
dell_smbios 16384 1 dell_wmi
wmi_bmof 16384 0
sparse_keymap 16384 1 dell_wmi
i915 1261568 19
mxm_wmi 16384 0
dcdbas 16384 1 dell_smbios
brcmfmac 167936 0
brcmutil 16384 1 brcmfmac
joydev 24576 0
input_leds 16384 0
serio_raw 16384 0
pcspkr 16384 0
i2c_i801 24576 0
dell_smo8800 16384 0
wmi 24576 3 dell_wmi,wmi_bmof,mxm_wmi
cramfs 49152 0
raid10 45056 0
raid456 110592 0
async_raid6_recov 16384 1 raid456
async_memcpy 16384 1 raid456
async_pq 16384 1 raid456
async_xor 16384 2 async_pq,raid456
xor 24576 1 async_xor
async_tx 16384 5 async_pq,async_memcpy,async_xor,raid456,async_raid6_recov
raid6_pq 114688 3 async_pq,raid456,async_raid6_recov
raid1 36864 0
raid0 16384 0
dm_verity 20480 0
dm_snapshot 40960 0
dm_mirror 20480 0
dm_region_hash 16384 1 dm_mirror
dm_log 16384 2 dm_region_hash,dm_mirror
dm_bufio 28672 2 dm_verity,dm_snapshot
hid_sunplus 16384 0
hid_sony 28672 0
hid_samsung 16384 0
hid_pl 16384 0
hid_petalynx 16384 0
hid_monterey 16384 0
hid_microsoft 16384 0
hid_gyration 16384 0
hid_ezkey 16384 0
hid_cypress 16384 0
hid_chicony 16384 0
hid_cherry 16384 0
hid_belkin 16384 0
hid_apple 16384 0
hid_a4tech 16384 0
scsi_transport_fc 57344 0
virtio_crypto 20480 0
crypto_engine 16384 1 virtio_crypto
virtio_rng 16384 0
virtio_console 28672 0
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Additionally I list builtin drivers which are loaded:
| Code: | zangetsu@venus ~/proj/uae-graphaware/repos/tmp/jukebox $ cat /lib/modules/$(uname -r)/modules.builtin|grep driver
kernel/drivers/acpi/ac.ko
kernel/drivers/acpi/button.ko
kernel/drivers/acpi/fan.ko
kernel/drivers/acpi/video.ko
kernel/drivers/acpi/processor.ko
kernel/drivers/acpi/thermal.ko
kernel/drivers/acpi/battery.ko
kernel/drivers/acpi/sbshc.ko
kernel/drivers/acpi/sbs.ko
kernel/drivers/acpi/ec_sys.ko
kernel/drivers/acpi/acpi_configfs.ko
kernel/drivers/acpi/nfit/nfit.ko
kernel/drivers/ata/libata.ko
kernel/drivers/ata/ahci.ko
kernel/drivers/ata/libahci.ko
kernel/drivers/ata/ahci_platform.ko
kernel/drivers/ata/libahci_platform.ko
kernel/drivers/base/firmware_class.ko
kernel/drivers/base/regmap/regmap-i2c.ko
kernel/drivers/bcma/bcma.ko
kernel/drivers/block/brd.ko
kernel/drivers/block/loop.ko
kernel/drivers/block/nbd.ko
kernel/drivers/block/virtio_blk.ko
kernel/drivers/char/agp/agpgart.ko
kernel/drivers/char/agp/amd64-agp.ko
kernel/drivers/char/agp/intel-agp.ko
kernel/drivers/char/agp/intel-gtt.ko
kernel/drivers/char/hw_random/rng-core.ko
kernel/drivers/char/hw_random/intel-rng.ko
kernel/drivers/char/hw_random/amd-rng.ko
kernel/drivers/char/hw_random/via-rng.ko
kernel/drivers/connector/cn.ko
kernel/drivers/cpufreq/cpufreq_performance.ko
kernel/drivers/cpufreq/cpufreq_powersave.ko
kernel/drivers/cpufreq/cpufreq_userspace.ko
kernel/drivers/cpufreq/cpufreq_ondemand.ko
kernel/drivers/cpufreq/cpufreq_conservative.ko
kernel/drivers/cpufreq/acpi-cpufreq.ko
kernel/drivers/cpufreq/pcc-cpufreq.ko
kernel/drivers/dax/dax.ko
kernel/drivers/dma/dw/dw_dmac_core.ko
kernel/drivers/edac/edac_core.ko
kernel/drivers/extcon/extcon-core.ko
kernel/drivers/firmware/efi/efivars.ko
kernel/drivers/gpu/drm/drm_kms_helper.ko
kernel/drivers/gpu/drm/drm.ko
kernel/drivers/hid/hid.ko
kernel/drivers/hid/uhid.ko
kernel/drivers/hid/hid-generic.ko
kernel/drivers/hid/hid-lenovo.ko
kernel/drivers/hid/hid-logitech.ko
kernel/drivers/hid/hid-logitech-dj.ko
kernel/drivers/hid/hid-logitech-hidpp.ko
kernel/drivers/hid/hid-magicmouse.ko
kernel/drivers/hid/hid-multitouch.ko
kernel/drivers/hid/hid-saitek.ko
kernel/drivers/hid/i2c-hid/i2c-hid.ko
kernel/drivers/hid/usbhid/usbhid.ko
kernel/drivers/hwmon/hwmon.ko
kernel/drivers/hwmon/acpi_power_meter.ko
kernel/drivers/hwmon/coretemp.ko
kernel/drivers/hwmon/dell-smm-hwmon.ko
kernel/drivers/i2c/i2c-core.ko
kernel/drivers/i2c/algos/i2c-algo-bit.ko
kernel/drivers/input/input-core.ko
kernel/drivers/input/ff-memless.ko
kernel/drivers/input/mousedev.ko
kernel/drivers/input/evdev.ko
kernel/drivers/input/keyboard/atkbd.ko
kernel/drivers/input/mouse/appletouch.ko
kernel/drivers/input/mouse/bcm5974.ko
kernel/drivers/input/mouse/psmouse.ko
kernel/drivers/input/mouse/synaptics_i2c.ko
kernel/drivers/input/mouse/synaptics_usb.ko
kernel/drivers/input/touchscreen/of_touchscreen.ko
kernel/drivers/input/serio/serio.ko
kernel/drivers/input/serio/i8042.ko
kernel/drivers/input/serio/libps2.ko
kernel/drivers/leds/led-class.ko
kernel/drivers/md/md-mod.ko
kernel/drivers/md/dm-mod.ko
kernel/drivers/md/dm-crypt.ko
kernel/drivers/md/bcache/bcache.ko
kernel/drivers/memstick/core/memstick.ko
kernel/drivers/mfd/mfd-core.ko
kernel/drivers/mfd/lpc_sch.ko
kernel/drivers/misc/tifm_core.ko
kernel/drivers/misc/tifm_7xx1.ko
kernel/drivers/misc/cb710/cb710.ko
kernel/drivers/misc/mic/bus/mic_bus.ko
kernel/drivers/mmc/core/mmc_core.ko
kernel/drivers/net/macvlan.ko
kernel/drivers/net/mii.ko
kernel/drivers/net/netconsole.ko
kernel/drivers/net/tun.ko
kernel/drivers/net/veth.ko
kernel/drivers/net/virtio_net.ko
kernel/drivers/net/usb/r8152.ko
kernel/drivers/net/usb/usbnet.ko
kernel/drivers/nvdimm/libnvdimm.ko
kernel/drivers/nvdimm/nd_pmem.ko
kernel/drivers/nvdimm/nd_btt.ko
kernel/drivers/nvdimm/nd_blk.ko
kernel/drivers/nvme/host/nvme-core.ko
kernel/drivers/nvme/host/nvme.ko
kernel/drivers/nvmem/nvmem_core.ko
kernel/drivers/pps/pps_core.ko
kernel/drivers/rtc/rtc-cmos.ko
kernel/drivers/scsi/scsi_mod.ko
kernel/drivers/scsi/raid_class.ko
kernel/drivers/scsi/scsi_transport_sas.ko
kernel/drivers/scsi/sd_mod.ko
kernel/drivers/scsi/sg.ko
kernel/drivers/thermal/thermal_sys.ko
kernel/drivers/thermal/intel_powerclamp.ko
kernel/drivers/thermal/x86_pkg_temp_thermal.ko
kernel/drivers/tty/serial/serial_core.ko
kernel/drivers/tty/serial/8250/8250.ko
kernel/drivers/tty/serial/8250/8250_base.ko
kernel/drivers/tty/serial/8250/8250_pci.ko
kernel/drivers/tty/serial/8250/8250_exar.ko
kernel/drivers/tty/serial/8250/8250_lpss.ko
kernel/drivers/usb/class/cdc-acm.ko
kernel/drivers/usb/class/cdc-wdm.ko
kernel/drivers/usb/common/usb-common.ko
kernel/drivers/usb/common/usb-otg-fsm.ko
kernel/drivers/usb/core/usbcore.ko
kernel/drivers/usb/dwc2/dwc2.ko
kernel/drivers/usb/dwc2/dwc2_pci.ko
kernel/drivers/usb/host/ehci-hcd.ko
kernel/drivers/usb/host/ehci-pci.ko
kernel/drivers/usb/host/ehci-platform.ko
kernel/drivers/usb/host/ohci-hcd.ko
kernel/drivers/usb/host/ohci-pci.ko
kernel/drivers/usb/host/uhci-hcd.ko
kernel/drivers/usb/host/xhci-hcd.ko
kernel/drivers/usb/host/xhci-pci.ko
kernel/drivers/usb/host/xhci-plat-hcd.ko
kernel/drivers/usb/mon/usbmon.ko
kernel/drivers/usb/phy/phy-generic.ko
kernel/drivers/usb/storage/usb-storage.ko
kernel/drivers/video/backlight/backlight.ko
kernel/drivers/video/fbdev/core/fb.ko
kernel/drivers/video/fbdev/core/cfbfillrect.ko
kernel/drivers/video/fbdev/core/cfbcopyarea.ko
kernel/drivers/video/fbdev/core/cfbimgblt.ko
kernel/drivers/video/fbdev/core/sysfillrect.ko
kernel/drivers/video/fbdev/core/syscopyarea.ko
kernel/drivers/video/fbdev/core/sysimgblt.ko
kernel/drivers/video/fbdev/core/fb_sys_fops.ko
kernel/drivers/virtio/virtio.ko
kernel/drivers/virtio/virtio_ring.ko
kernel/drivers/virtio/virtio_mmio.ko
kernel/drivers/virtio/virtio_pci.ko
kernel/drivers/virtio/virtio_balloon.ko
kernel/drivers/virtio/virtio_input.ko
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Thx for any hints.
_________________
Emperor wants to control outer space Yoda wants to explore inner space that's the fundamental difference between good and bad sides of the Force
Last edited by archenroot on Sun Oct 28, 2018 5:27 am; edited 2 times in total |
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Keruskerfuerst
Advocate
Joined: 01 Feb 2006
Posts: 2289
Location: near Augsburg, Germany
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| Posted: Fri Oct 26, 2018 6:26 am Post subject: |
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| Can you check the settings in the Bios ? |
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archenroot
Apprentice
Joined: 13 Dec 2011
Posts: 218
Location: Lake Macha, Czech republic
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| Posted: Sun Oct 28, 2018 5:17 am Post subject: |
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I went to BIOS where all is as per my understanding set to max performance, but 2 things were configured as enabled:
Intel SpeedStep
C-States Control
I think these both can have effect on perfromance. I did my first change on kernel level in grub2 config:
| Code: | zangetsu@venus ~ $ cat /etc/default/grub |grep LINUX_DEFAULT
GRUB_CMDLINE_LINUX_DEFAULT="intel_idle.max_cstate=0 processor.max_cstate=1" |
After regenerating grub config and reboot I still see dynamic changes to frequency, but it never goes under 1,5GHz, which is just fine for me.
So I consider this as solved. The real issue was when I started my IDE which loaded quite big amount of files or I started compilation of project and CPU still running at 300-400MHz and didn't auto scale frequency up. This whole behaviour affected the KDE plasma usage as I clicked on some application and had to wait for few seconds , now desktop behaviour is back in reactive state.
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Emperor wants to control outer space Yoda wants to explore inner space that's the fundamental difference between good and bad sides of the Force |
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Hu
Moderator
Joined: 06 Mar 2007
Posts: 21631
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| Posted: Sun Oct 28, 2018 3:53 pm Post subject: |
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| Restricting cstate usage like that will prevent the system from saving power as effectively. |
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haarp
Guru
Joined: 31 Oct 2007
Posts: 535
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| Posted: Sun Oct 28, 2018 6:36 pm Post subject: |
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lscpu or /proc/cpuinfo is wildly inaccurate. I think in recent kernels it even shows some cores clocking at 0 if they're stopped (in C6 sleep or deeper)
Better use i7z or turbostat to watch clock speeds. |
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The Main Man
Veteran
Joined: 27 Nov 2014
Posts: 1166
Location: /run/user/1000
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| Posted: Sun Oct 28, 2018 7:48 pm Post subject: |
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Inaccurate indeed.
I found that this gives me best results
| Code: | | cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq |
Number should be divided by 1000000 to get GHz, and formatted to %.1f to get something like 2.4 |
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