One core of cpu always high usage

If you press shift+k (= hide/show kernel threads) in htop, can you find more information about cpu usage?

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image

edit: gotta add that im on LTS kernel, and seems it doesnt matter how many apps i open/kill, second one is always above +80 and others are normal, like 30-40%

In the screenshot Discord uses a lot of cpu. If you close it, another process will start consuming cpu?

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yeah cuz i was screensharing in discord

how it looks like after i closed discord and chrome :
image

output of watch -n.5 cat /proc/interrupts:
image

does this help?
i think 16: is what making the difference!

If you try enter: lspci -nnkvand look for IRQ 16?

Edit:
Is it your touchpad? I must hit to bed. :zzz:

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i think you mean ths right?

00:16.0 Communication controller [0780]: Intel Corporation Sunrise Point-LP CSME HECI #1 [8086:9d3a] (rev 21)
	Subsystem: Acer Incorporated [ALI] Device [1025:108f]
	Flags: bus master, fast devsel, latency 0, IRQ 129
	Memory at c452c000 (64-bit, non-prefetchable) [size=4K]
	Capabilities: <access denied>
	Kernel driver in use: mei_me
	Kernel modules: mei_me

i2c_designware is my touchpad and idma64 intel AFAIK

edit : full output

full output
00:00.0 Host bridge [0600]: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Host Bridge/DRAM Registers [8086:1904] (rev 08)
	Subsystem: Acer Incorporated [ALI] Device [1025:108f]
	Flags: bus master, fast devsel, latency 0
	Capabilities: <access denied>
	Kernel driver in use: skl_uncore

00:02.0 VGA compatible controller [0300]: Intel Corporation Skylake GT2 [HD Graphics 520] [8086:1916] (rev 07) (prog-if 00 [VGA controller])
	Subsystem: Acer Incorporated [ALI] Device [1025:108f]
	Flags: bus master, fast devsel, latency 0, IRQ 131
	Memory at c2000000 (64-bit, non-prefetchable) [size=16M]
	Memory at d0000000 (64-bit, prefetchable) [size=256M]
	I/O ports at 5000 [size=64]
	Expansion ROM at 000c0000 [virtual] [disabled] [size=128K]
	Capabilities: <access denied>
	Kernel driver in use: i915
	Kernel modules: i915

00:14.0 USB controller [0c03]: Intel Corporation Sunrise Point-LP USB 3.0 xHCI Controller [8086:9d2f] (rev 21) (prog-if 30 [XHCI])
	Subsystem: Acer Incorporated [ALI] Device [1025:108f]
	Flags: bus master, medium devsel, latency 0, IRQ 128
	Memory at c4500000 (64-bit, non-prefetchable) [size=64K]
	Capabilities: <access denied>
	Kernel driver in use: xhci_hcd
	Kernel modules: xhci_pci

00:14.2 Signal processing controller [1180]: Intel Corporation Sunrise Point-LP Thermal subsystem [8086:9d31] (rev 21)
	Subsystem: Acer Incorporated [ALI] Device [1025:108f]
	Flags: bus master, fast devsel, latency 0, IRQ 18
	Memory at c452a000 (64-bit, non-prefetchable) [size=4K]
	Capabilities: <access denied>
	Kernel driver in use: intel_pch_thermal
	Kernel modules: intel_pch_thermal

00:15.0 Signal processing controller [1180]: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #0 [8086:9d60] (rev 21)
	Subsystem: Acer Incorporated [ALI] Device [1025:108f]
	Flags: bus master, fast devsel, latency 0, IRQ 16
	Memory at c452b000 (64-bit, non-prefetchable) [size=4K]
	Capabilities: <access denied>
	Kernel driver in use: intel-lpss
	Kernel modules: intel_lpss_pci

00:16.0 Communication controller [0780]: Intel Corporation Sunrise Point-LP CSME HECI #1 [8086:9d3a] (rev 21)
	Subsystem: Acer Incorporated [ALI] Device [1025:108f]
	Flags: bus master, fast devsel, latency 0, IRQ 129
	Memory at c452c000 (64-bit, non-prefetchable) [size=4K]
	Capabilities: <access denied>
	Kernel driver in use: mei_me
	Kernel modules: mei_me

00:17.0 SATA controller [0106]: Intel Corporation Sunrise Point-LP SATA Controller [AHCI mode] [8086:9d03] (rev 21) (prog-if 01 [AHCI 1.0])
	Subsystem: Acer Incorporated [ALI] Device [1025:108f]
	Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 126
	Memory at c4528000 (32-bit, non-prefetchable) [size=8K]
	Memory at c452f000 (32-bit, non-prefetchable) [size=256]
	I/O ports at 5080 [size=8]
	I/O ports at 5088 [size=4]
	I/O ports at 5060 [size=32]
	Memory at c452d000 (32-bit, non-prefetchable) [size=2K]
	Capabilities: <access denied>
	Kernel driver in use: ahci

00:1c.0 PCI bridge [0604]: Intel Corporation Sunrise Point-LP PCI Express Root Port #1 [8086:9d10] (rev f1) (prog-if 00 [Normal decode])
	Subsystem: Acer Incorporated [ALI] Device [1025:108f]
	Flags: bus master, fast devsel, latency 0, IRQ 122
	Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
	I/O behind bridge: 4000-4fff [size=4K] [16-bit]
	Memory behind bridge: c3000000-c40fffff [size=17M] [32-bit]
	Prefetchable memory behind bridge: b0000000-c1ffffff [size=288M] [32-bit]
	Capabilities: <access denied>
	Kernel driver in use: pcieport

00:1d.0 PCI bridge [0604]: Intel Corporation Sunrise Point-LP PCI Express Root Port #9 [8086:9d18] (rev f1) (prog-if 00 [Normal decode])
	Subsystem: Acer Incorporated [ALI] Device [1025:108f]
	Flags: bus master, fast devsel, latency 0, IRQ 123
	Bus: primary=00, secondary=02, subordinate=02, sec-latency=0
	I/O behind bridge: 6000-6fff [size=4K] [16-bit]
	Memory behind bridge: ad900000-adafffff [size=2M] [32-bit]
	Prefetchable memory behind bridge: adb00000-adcfffff [size=2M] [32-bit]
	Capabilities: <access denied>
	Kernel driver in use: pcieport

00:1d.2 PCI bridge [0604]: Intel Corporation Sunrise Point-LP PCI Express Root Port #11 [8086:9d1a] (rev f1) (prog-if 00 [Normal decode])
	Subsystem: Acer Incorporated [ALI] Device [1025:108f]
	Flags: bus master, fast devsel, latency 0, IRQ 124
	Bus: primary=00, secondary=03, subordinate=03, sec-latency=0
	I/O behind bridge: [disabled] [16-bit]
	Memory behind bridge: c4200000-c43fffff [size=2M] [32-bit]
	Prefetchable memory behind bridge: [disabled] [64-bit]
	Capabilities: <access denied>
	Kernel driver in use: pcieport

00:1d.3 PCI bridge [0604]: Intel Corporation Device [8086:9d1b] (rev f1) (prog-if 00 [Normal decode])
	Subsystem: Acer Incorporated [ALI] Device [1025:108f]
	Flags: bus master, fast devsel, latency 0, IRQ 125
	Bus: primary=00, secondary=04, subordinate=04, sec-latency=0
	I/O behind bridge: 3000-3fff [size=4K] [16-bit]
	Memory behind bridge: c4400000-c44fffff [size=1M] [32-bit]
	Prefetchable memory behind bridge: [disabled] [64-bit]
	Capabilities: <access denied>
	Kernel driver in use: pcieport

00:1f.0 ISA bridge [0601]: Intel Corporation Sunrise Point-LP LPC Controller [8086:9d48] (rev 21)
	Subsystem: Acer Incorporated [ALI] Device [1025:108f]
	Flags: bus master, medium devsel, latency 0

00:1f.2 Memory controller [0580]: Intel Corporation Sunrise Point-LP PMC [8086:9d21] (rev 21)
	Subsystem: Acer Incorporated [ALI] Device [1025:108f]
	Flags: bus master, fast devsel, latency 0
	Memory at c4524000 (32-bit, non-prefetchable) [size=16K]

00:1f.3 Audio device [0403]: Intel Corporation Sunrise Point-LP HD Audio [8086:9d70] (rev 21)
	Subsystem: Acer Incorporated [ALI] Device [1025:108f]
	Flags: bus master, fast devsel, latency 32, IRQ 132
	Memory at c4520000 (64-bit, non-prefetchable) [size=16K]
	Memory at c4510000 (64-bit, non-prefetchable) [size=64K]
	Capabilities: <access denied>
	Kernel driver in use: snd_hda_intel
	Kernel modules: snd_hda_intel, snd_soc_skl

00:1f.4 SMBus [0c05]: Intel Corporation Sunrise Point-LP SMBus [8086:9d23] (rev 21)
	Subsystem: Acer Incorporated [ALI] Device [1025:108f]
	Flags: medium devsel, IRQ 16
	Memory at c452e000 (64-bit, non-prefetchable) [size=256]
	I/O ports at 5040 [size=32]
	Kernel driver in use: i801_smbus
	Kernel modules: i2c_i801

01:00.0 3D controller [0302]: NVIDIA Corporation GM107 [GeForce 940MX] [10de:179c] (rev a2)
	Subsystem: Acer Incorporated [ALI] Device [1025:108f]
	Flags: bus master, fast devsel, latency 0, IRQ 134
	Memory at c3000000 (32-bit, non-prefetchable) [size=16M]
	Memory at b0000000 (64-bit, prefetchable) [size=256M]
	Memory at c0000000 (64-bit, prefetchable) [size=32M]
	I/O ports at 4000 [size=128]
	Expansion ROM at c4080000 [virtual] [disabled] [size=512K]
	Capabilities: <access denied>
	Kernel driver in use: nvidia
	Kernel modules: nouveau, nvidia_drm, nvidia

01:00.1 Audio device [0403]: NVIDIA Corporation GM107 High Definition Audio Controller [GeForce 940MX] [10de:0fbc] (rev a1)
	Subsystem: Acer Incorporated [ALI] Device [1025:108f]
	Flags: bus master, fast devsel, latency 0, IRQ 17
	Memory at c4000000 (32-bit, non-prefetchable) [size=16K]
	Capabilities: <access denied>
	Kernel driver in use: snd_hda_intel
	Kernel modules: snd_hda_intel

03:00.0 Network controller [0280]: Qualcomm Atheros QCA9377 802.11ac Wireless Network Adapter [168c:0042] (rev 31)
	Subsystem: Lite-On Communications Inc Qualcomm Atheros QCA9377 802.11ac Wireless Network Adapter [11ad:08a6]
	Flags: bus master, fast devsel, latency 0, IRQ 133
	Memory at c4200000 (64-bit, non-prefetchable) [size=2M]
	Capabilities: <access denied>
	Kernel driver in use: ath10k_pci
	Kernel modules: ath10k_pci

04:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTL8411B PCI Express Card Reader [10ec:5287] (rev 01)
	Subsystem: Acer Incorporated [ALI] Device [1025:108f]
	Flags: bus master, fast devsel, latency 0, IRQ 127
	Memory at c4405000 (32-bit, non-prefetchable) [size=4K]
	Expansion ROM at c4410000 [disabled] [size=64K]
	Capabilities: <access denied>
	Kernel driver in use: rtsx_pci
	Kernel modules: rtsx_pci

04:00.1 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 12)
	Subsystem: Acer Incorporated [ALI] Device [1025:108f]
	Flags: bus master, fast devsel, latency 0, IRQ 19
	I/O ports at 3000 [size=256]
	Memory at c4404000 (64-bit, non-prefetchable) [size=4K]
	Memory at c4400000 (64-bit, non-prefetchable) [size=16K]
	Capabilities: <access denied>
	Kernel driver in use: r8169
	Kernel modules: r8169


No, this one:

00:15.0 Signal processing controller [1180]: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #0 [8086:9d60] (rev 21)
	Subsystem: Acer Incorporated [ALI] Device [1025:108f]
	Flags: bus master, fast devsel, latency 0, IRQ 16
	Memory at c452b000 (64-bit, non-prefetchable) [size=4K]
	Capabilities: <access denied>
	Kernel driver in use: intel-lpss
	Kernel modules: intel_lpss_pci

Its audio device?

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idk if its my audio or smth else
noticed one thing, when i switch to nvidia (using optimus) load goes on core0 (instead of core1 like you saw in screenshots)

:zzz: i must. Letā€™s hope someone will help from now on.

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ok have a good night

thanks for helping <3

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only a bet in the darkā€¦ could you try booting ISO-USB with default boot option? to see if without using Nvidia driver it does the same?

And next time simply linking the forum post in chat and tagging me would be good to goā€¦ :wink:

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Yeah it was the same

About second part yeah tou right, my bad

I skipped reading.

The question:
Only Core 1 always high usage? Not other core 0, 2 or 3?

If yes, it would like the defective core to me.
If no, maybe integration GPU not working and gives a core that works alone

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idk why and how, but i switched back to latest kernel and problem solved !!!

image

iā€™ll wait 1-2 more days and mark as solved if everything were ok!

its resolved out of nowhere but,
when im on iGPU, its core 1 and when im on dGPU, its core0

so its not a defective core i assume

just an update

i logged out and logged in again, problem came back -___-

i can confirm that rmmod intel_lpss_pci solved problem completely !!

thanks everyone involved in helping me :heart:

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https://bugzilla.redhat.com/show_bug.cgi?id=1550741

looks very similar.

But nice to see its solvedā€¦ i know that such issues are very annoying.
Remembering this happens a lot more often in the past but very rare luckily nowadays.

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It doesnā€™t seem final to me.
If you are sure this is your solution, you need to blacklist the module, to be completely solved :wink: .

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