when any application which can play audio is running, and I start a new application which plays audio, there’s a CPU-usage spike in plasmashell of about 5% per app started. This freezes everything for up to a second.
my complaint is not so much the cpu usage itself, but the prioritisation of plasmashell over everything else.
this happens often because I have hotkeys for useful functions which also play sound effects for clarity. I can turn off the sound effects, but that just hides the problem, and I shouldn’t have to anyway.
If I run OBS with priority FIFO 90 (almost the highest possible), and run plasmashell with Batch 19 (the lowest possible), plasmashell still gets all the time it wants to do whatever it’s doing before obs gets any time at all.
I even tried running plasmashell in the app.slice cgroup where OBS also runs, but plasmashell still gets absolute priority over all apps.
Is there some other prioritisation mechanism I’m not aware of?
when plasamashell is stopped, the problem stops too.
I am using pipewire.
I have also tried disabling everything in the system tray relating to audio, as was recommended by one post I found. No difference.
problem exists in both plasmashell 5.22.4 and 5.22.5 (latest)
Results of
sudo inxi --admin --verbosity=7 --filter --no-host --width
System:
Kernel: 5.4.144-1-MANJARO x86_64 bits: 64 compiler: gcc v: 11.1.0
parameters: BOOT_IMAGE=/boot/vmlinuz-5.4-x86_64
root=UUID=16c002c6-52f8-47e4-a124-6a0942150ed4 rw quiet udev.log_priority=3
Console: tty pts/3 wm: kwin_x11 DM: SDDM Distro: Manjaro Linux
base: Arch Linux
Machine:
Type: Desktop System: Micro-Star product: MS-7B86 v: 4.0 serial: N/A
Mobo: Micro-Star model: B450-A PRO MAX (MS-7B86) v: 4.0 serial: <filter>
UEFI: American Megatrends LLC. v: M.D0 date: 05/17/2021
Battery:
Device-1: hidpp_battery_3
model: Logitech G305 Lightspeed Wireless Gaming Mouse serial: <filter>
charge: 100% (should be ignored) rechargeable: yes status: Discharging
Memory:
RAM: total: 31.35 GiB used: 10.49 GiB (33.5%)
Array-1: capacity: 128 GiB slots: 4 EC: None max-module-size: 32 GiB
note: est.
Device-1: DIMM 0 size: 8 GiB speed: 3800 MT/s type: DDR4
detail: synchronous unbuffered (unregistered) bus-width: 64 bits
total: 64 bits manufacturer: Crucial part-no: BL8G36C16U4B.M8FE1
serial: <filter>
Device-2: DIMM 1 size: 8 GiB speed: 3800 MT/s type: DDR4
detail: synchronous unbuffered (unregistered) bus-width: 64 bits
total: 64 bits manufacturer: Crucial part-no: BL8G36C16U4W.M8FE1
serial: <filter>
Device-3: DIMM 0 size: 8 GiB speed: 3800 MT/s type: DDR4
detail: synchronous unbuffered (unregistered) bus-width: 64 bits
total: 64 bits manufacturer: Crucial part-no: BL8G36C16U4B.M8FE1
serial: <filter>
Device-4: DIMM 1 size: 8 GiB speed: 3800 MT/s type: DDR4
detail: synchronous unbuffered (unregistered) bus-width: 64 bits
total: 64 bits manufacturer: Crucial part-no: BL8G36C16U4W.M8FE1
serial: <filter>
CPU:
Info: 8-Core model: AMD Ryzen 7 3700X socket: AM4 bits: 64 type: MT MCP
arch: Zen 2 family: 17 (23) model-id: 71 (113) stepping: 0
microcode: 8701021 cache: L1: 512 KiB L2: 4 MiB L3: 32 MiB bogomips: 115250
Speed: 3764 MHz min/max: 2200/3600 MHz base/boost: 3600/4400 boost: enabled
volts: 1.1 V ext-clock: 100 MHz Core speeds (MHz): 1: 3764 2: 3950 3: 3889
4: 3755 5: 3641 6: 3751 7: 3876 8: 3821 9: 3820 10: 3687 11: 3889 12: 3707
13: 3824 14: 3861 15: 3867 16: 3895
Flags: 3dnowprefetch abm adx aes aperfmperf apic arat avic avx avx2 bmi1
bmi2 bpext cat_l3 cdp_l3 clflush clflushopt clwb clzero cmov cmp_legacy
constant_tsc cpb cpuid cqm cqm_llc cqm_mbm_local cqm_mbm_total cqm_occup_llc
cr8_legacy cx16 cx8 de decodeassists extapic extd_apicid f16c flushbyasid
fma fpu fsgsbase fxsr fxsr_opt ht hw_pstate ibpb ibs irperf lahf_lm lbrv lm
mba mca mce misalignsse mmx mmxext monitor movbe msr mtrr mwaitx nonstop_tsc
nopl npt nrip_save nx osvw overflow_recov pae pat pausefilter pclmulqdq
pdpe1gb perfctr_core perfctr_llc perfctr_nb pfthreshold pge pni popcnt pse
pse36 rdpid rdrand rdseed rdt_a rdtscp rep_good sep sev sha_ni skinit smap
smca sme smep ssbd sse sse2 sse4_1 sse4_2 sse4a ssse3 stibp succor svm
svm_lock syscall tce topoext tsc tsc_scale umip v_vmsave_vmload vgif
vmcb_clean vme vmmcall wbnoinvd wdt xgetbv1 xsave xsavec xsaveerptr xsaveopt
xsaves
Vulnerabilities: Type: itlb_multihit status: Not affected
Type: l1tf status: Not affected
Type: mds status: Not affected
Type: meltdown status: Not affected
Type: spec_store_bypass
mitigation: Speculative Store Bypass disabled via prctl and seccomp
Type: spectre_v1
mitigation: usercopy/swapgs barriers and __user pointer sanitization
Type: spectre_v2 mitigation: Full AMD retpoline, IBPB: conditional, STIBP:
conditional, RSB filling
Type: srbds status: Not affected
Type: tsx_async_abort status: Not affected
Graphics:
Device-1: NVIDIA GM204 [GeForce GTX 970] vendor: eVga.com. driver: nvidia
v: 470.63.01 alternate: nouveau,nvidia_drm bus-ID: 25:00.0
chip-ID: 10de:13c2 class-ID: 0300
Device-2: AMD Fiji [Radeon R9 FURY / NANO Series] driver: amdgpu v: kernel
bus-ID: 26:00.0 chip-ID: 1002:7300 class-ID: 0300
Device-3: Logitech HD Pro Webcam C920 type: USB
driver: snd-usb-audio,uvcvideo bus-ID: 1-8:2 chip-ID: 046d:082d
class-ID: 0102 serial: <filter>
Display: server: X.Org 1.20.13 compositor: kwin_x11 driver:
loaded: amdgpu,ati,nvidia unloaded: modesetting,nouveau
alternate: fbdev,nv,vesa display-ID: :0 screens: 1
Screen-1: 0 s-res: 3440x1440 s-dpi: 96 s-size: 910x381mm (35.8x15.0")
s-diag: 987mm (38.8")
Monitor-1: DisplayPort-0 res: 3440x1440 dpi: 110
size: 797x334mm (31.4x13.1") diag: 864mm (34")
OpenGL: renderer: AMD Radeon R9 Fury Series (FIJI DRM 3.35.0
5.4.144-1-MANJARO LLVM 12.0.1)
v: 4.6 Mesa 21.2.1 direct render: Yes
Audio:
Device-1: AMD Fiji HDMI/DP Audio [Radeon R9 Nano / FURY/FURY X]
driver: snd_hda_intel v: kernel bus-ID: 26:00.1 chip-ID: 1002:aae8
class-ID: 0403
Device-2: AMD Starship/Matisse HD Audio vendor: Micro-Star MSI
driver: snd_hda_intel v: kernel bus-ID: 28:00.4 chip-ID: 1022:1487
class-ID: 0403
Device-3: Logitech HD Pro Webcam C920 type: USB
driver: snd-usb-audio,uvcvideo bus-ID: 1-8:2 chip-ID: 046d:082d
class-ID: 0102 serial: <filter>
Device-4: Texas Instruments PCM2902 Audio Codec type: USB
driver: hid-generic,snd-usb-audio,usbhid bus-ID: 3-1:2 chip-ID: 08bb:2902
class-ID: 0300
Sound Server-1: ALSA v: k5.4.144-1-MANJARO running: yes
Sound Server-2: sndio v: N/A running: no
Sound Server-3: JACK v: 1.9.19 running: no
Sound Server-4: PulseAudio v: 15.0 running: no
Sound Server-5: PipeWire v: 0.3.35 running: yes
Network:
Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet
vendor: Micro-Star MSI driver: r8169 v: kernel port: e000 bus-ID: 22:00.0
chip-ID: 10ec:8168 class-ID: 0200
IF: enp34s0 state: up speed: 1000 Mbps duplex: full mac: <filter>
IP v4: <filter> type: dynamic noprefixroute scope: global
broadcast: <filter>
IP v6: <filter> type: noprefixroute scope: link
WAN IP: <filter>
Bluetooth:
Message: No bluetooth data found.
Logical:
Message: No logical block device data found.
RAID:
Device-1: cache type: zfs status: - level: linear zfs-fs: size: 3.29 TiB
free: raw: size: N/A free: N/A
Components: Online:
1:
Device-2: colossus type: zfs status: ONLINE level: linear raw: size: 3.4 TiB
free: 174 GiB allocated: 3.23 TiB zfs-fs: size: 3.29 TiB free: 65.59 GiB
Components: Online:
1: sdb maj-min: 8:16 size: 2.73 TiB
2: sdc maj-min: 8:32 size: 698.64 GiB
Device-3: logs type: zfs status: - level: linear zfs-fs: size: 3.29 TiB
free: raw: size: N/A free: N/A
Components: Online:
1:
Drives:
Local Storage: total: raw: 3.75 TiB usable: 7.08 TiB used: 3.52 TiB (49.7%)
ID-1: /dev/nvme0n1 maj-min: 259:0 vendor: Samsung
model: SSD 970 EVO Plus 250GB size: 232.89 GiB block-size: physical: 512 B
logical: 512 B speed: 31.6 Gb/s lanes: 4 type: SSD serial: <filter>
rev: 2B2QEXM7 temp: 45 Celsius C scheme: GPT
SMART: yes health: PASSED on: 49d 23h cycles: 717
read-units: 5,721,356 [2.92 TB] written-units: 85,281,339 [43.6 TB]
ID-2: /dev/sda maj-min: 8:0 vendor: SanDisk model: SDSSDHII120G
family: Marvell based SSDs size: 111.79 GiB block-size: physical: 512 B
logical: 512 B sata: 3.2 speed: 6.0 Gb/s type: SSD serial: <filter>
rev: 00RL temp: 35 C scheme: MBR
SMART: yes state: enabled health: PASSED on: 3y 90d 14h cycles: 3055
ID-3: /dev/sdb maj-min: 8:16 vendor: Toshiba model: HDWD130 family: P300
size: 2.73 TiB block-size: physical: 4096 B logical: 512 B sata: 3.0
speed: 6.0 Gb/s type: HDD rpm: 7200 serial: <filter> rev: ACF0 temp: 42 C
scheme: GPT
SMART: yes state: enabled health: PASSED on: 2y 144d 17h cycles: 2118
ID-4: /dev/sdc maj-min: 8:32 vendor: Seagate model: ST3750528AS
family: Barracuda 7200.12 size: 698.64 GiB block-size: physical: 512 B
logical: 512 B sata: 2.6 speed: 3.0 Gb/s type: HDD rpm: 7200
serial: <filter> rev: CC44 temp: 40 C scheme: GPT
SMART: yes state: enabled health: PASSED on: 6y 112d 1h cycles: 5934
read: 91.3 GiB written: 482.48 GiB Pre-Fail: attribute: Spin_Retry_Count
value: 100 worst: 100 threshold: 97
Message: No optical or floppy data found.
Partition:
ID-1: / raw-size: 48.34 GiB size: 47.28 GiB (97.81%) used: 43.32 GiB (91.6%)
fs: ext4 block-size: 4096 B dev: /dev/nvme0n1p4 maj-min: 259:4 label: N/A
uuid: 16c002c6-52f8-47e4-a124-6a0942150ed4
ID-2: /boot/efi raw-size: 500 MiB size: 499.7 MiB (99.95%)
used: 6.8 MiB (1.4%) fs: vfat block-size: 512 B dev: /dev/nvme0n1p2
maj-min: 259:2 label: N/A uuid: 7B48-5FB6
ID-3: /mnt/120 raw-size: 111.79 GiB size: 109.92 GiB (98.32%)
used: 94.2 GiB (85.7%) fs: ext4 block-size: 4096 B dev: /dev/sda1
maj-min: 8:1 label: N/A uuid: edb6bdf6-9793-49b7-b2ca-fd90f4971d5f
ID-4: /mnt/colossus raw-size: N/A size: 3.29 TiB used: 3.23 TiB (98.1%)
fs: zfs logical: colossus
ID-5: /mnt/mainpart raw-size: 183.76 GiB size: 179.88 GiB (97.89%)
used: 159.76 GiB (88.8%) fs: ext4 block-size: 4096 B dev: /dev/nvme0n1p3
maj-min: 259:3 label: N/A uuid: 36312b62-36ba-4ae7-9c17-9a96dabdcfa7
Swap:
Alert: No swap data was found.
Unmounted:
Message: No unmounted partitions found.
USB:
Hub-1: 1-0:1 info: Full speed (or root) Hub ports: 10 rev: 2.0
speed: 480 Mb/s chip-ID: 1d6b:0002 class-ID: 0900
Device-1: 1-8:2 info: Logitech HD Pro Webcam C920 type: Video,Audio
driver: snd-usb-audio,uvcvideo interfaces: 4 rev: 2.0 speed: 480 Mb/s
power: 500mA chip-ID: 046d:082d class-ID: 0102 serial: <filter>
Device-2: 1-9:7 info: Samsung Galaxy A5 (MTP) type: <vendor specific>
driver: usbfs interfaces: 2 rev: 2.0 speed: 480 Mb/s power: 96mA
chip-ID: 04e8:6860 class-ID: 0000 serial: <filter>
Hub-2: 2-0:1 info: Full speed (or root) Hub ports: 4 rev: 3.1 speed: 10 Gb/s
chip-ID: 1d6b:0003 class-ID: 0900
Hub-3: 3-0:1 info: Full speed (or root) Hub ports: 4 rev: 2.0
speed: 480 Mb/s chip-ID: 1d6b:0002 class-ID: 0900
Device-1: 3-1:2 info: Texas Instruments PCM2902 Audio Codec type: Audio,HID
driver: hid-generic,snd-usb-audio,usbhid interfaces: 4 rev: 1.1
speed: 12 Mb/s power: 100mA chip-ID: 08bb:2902 class-ID: 0300
Hub-4: 3-2:3 info: Realtek RTS5411 Hub ports: 4 rev: 2.1 speed: 480 Mb/s
chip-ID: 0bda:5411 class-ID: 0900
Hub-5: 3-2.1:4 info: Realtek RTS5411 Hub ports: 4 rev: 2.1 speed: 480 Mb/s
chip-ID: 0bda:5411 class-ID: 0900
Device-1: 3-2.3:14 info: Logitech USB Receiver type: Keyboard,Mouse,HID
driver: logitech-djreceiver,usbhid interfaces: 3 rev: 2.0 speed: 12 Mb/s
power: 98mA chip-ID: 046d:c53f class-ID: 0300
Device-2: 3-2.4:7 info: Holtek USB Gaming Keyboard type: Keyboard,HID
driver: hid-generic,usbhid interfaces: 3 rev: 1.1 speed: 12 Mb/s
power: 100mA chip-ID: 04d9:a0f8 class-ID: 0300
Hub-6: 4-0:1 info: Full speed (or root) Hub ports: 4 rev: 3.1 speed: 10 Gb/s
chip-ID: 1d6b:0003 class-ID: 0900
Hub-7: 4-2:2 info: Realtek Hub ports: 4 rev: 3.2 speed: 5 Gb/s
chip-ID: 0bda:0411 class-ID: 0900
Hub-8: 4-2.1:3 info: Realtek Hub ports: 4 rev: 3.2 speed: 5 Gb/s
chip-ID: 0bda:0411 class-ID: 0900
Sensors:
System Temperatures: cpu: 51.0 C mobo: N/A gpu: amdgpu temp: 51.0 C
Fan Speeds (RPM): N/A gpu: amdgpu fan: 1513
Info:
Processes: 496 Uptime: 1d 4h 17m wakeups: 18 Init: systemd v: 249
tool: systemctl Compilers: gcc: 11.1.0 clang: 12.0.1 Packages: pacman: 1391
lib: 412 Shell: Zsh (sudo) v: 5.8 default: Bash v: 5.1.8 running-in: konsole
inxi: 3.3.06