Messages in this thread | | | Date | Fri, 25 Dec 2009 12:21:07 +0200 | From | Sergei Trofimovich <> | Subject | intel hda regression: 2.6.33-rc{1,2}: hd-audio0 eats 25% CPU (according to top) |
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$SUBJ
$ git describe v2.6.33-rc2
No matter if I actually play any sounds that process consumes 23-24% CPU Don't know if it's related to above: even if there is no any sound activity I can hear crackling in headphones.
$ lspci -vvv
00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio Controller (rev 03) Subsystem: Hewlett-Packard Company Device 30c9 Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+ Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0, Cache Line Size: 64 bytes Interrupt: pin A routed to IRQ 27 Region 0: Memory at e0644000 (64-bit, non-prefetchable) [size=16K] Capabilities: [50] Power Management version 2 Flags: PMEClk- DSI- D1- D2- AuxCurrent=55mA PME(D0+,D1-,D2-,D3hot+,D3cold+) Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME- Capabilities: [60] MSI: Enable+ Count=1/1 Maskable- 64bit+ Address: 00000000fee0300c Data: 4191 Capabilities: [70] Express (v1) Root Complex Integrated Endpoint, MSI 00 DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s unlimited, L1 unlimited ExtTag- RBE- FLReset- DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported- RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop+ MaxPayload 128 bytes, MaxReadReq 128 bytes DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr+ TransPend- LnkCap: Port #0, Speed unknown, Width x0, ASPM unknown, Latency L0 <64ns, L1 <1us ClockPM- Surprise- LLActRep- BwNot- LnkCtl: ASPM Disabled; Disabled- Retrain- CommClk- ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt- LnkSta: Speed unknown, Width x0, TrErr- Train- SlotClk- DLActive- BWMgmt- ABWMgmt- Capabilities: [100] Virtual Channel <?> Capabilities: [130] Root Complex Link <?> Kernel driver in use: HDA Intel Kernel modules: snd-hda-intel
$ powertop
Cn Avg residency P-states (frequencies) C0 (cpu running) (25.1%) 1200 Mhz 4.7% C1 0.0ms ( 0.0%) 1067 Mhz 0.2% C2 0.3ms (74.9%) 933 Mhz 0.2% 800 Mhz 94.9%
Wakeups-from-idle per second : 2931.9 interval: 10.0s no ACPI power usage estimate available
Top causes for wakeups: 80.6% (6766.8) <interrupt> : HDA Intel 10.5% (885.6) <kernel IPI> : Rescheduling interrupts 6.4% (541.3) <kernel core> : hrtimer_start_range_ns (tick_sched_timer) ...
Thanks!
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Sergei[unhandled content-type:application/octet-stream] | |