From: Takashi Iwai <tiwai@suse.de>
To: Sergei Trofimovich <slyich@gmail.com>
Cc: linux-kernel@vger.kernel.org,
"Maciej Rutecki" <maciej.rutecki@gmail.com>,
"Éric Piel" <eric.piel@tremplin-utc.net>
Subject: Re: intel hda regression: 2.6.33-rc{1,2}: hd-audio0 eats 25% CPU (according to top)
Date: Fri, 25 Dec 2009 12:18:57 +0100 [thread overview]
Message-ID: <s5h637vmhcu.wl%tiwai@suse.de> (raw)
In-Reply-To: <20091225122107.357d7102@mosly>
At Fri, 25 Dec 2009 12:21:07 +0200,
Sergei Trofimovich wrote:
>
> $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)
This has been already reported by some people, but unfortunately I
couldn't reproduce this on my test machines.
Eric figured out that replacing the whole sound/pci/hda/* files with
2.6.31 works, so this must be a regression in that area.
Could someone bisect it? The commits to check are restricted only in
sound/pci/hda, so there shouldn't be many changes.
% git bisect start -- sound/pci/hda
% git bisect bad
% git bisect good v2.6.32
thanks,
Takashi
next prev parent reply other threads:[~2009-12-25 11:19 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-25 9:31 drm/radeon/kms regression: 2.6.33-rc2 does not boot Andrei Gaponenko
2009-12-25 9:46 ` Dave Airlie
2009-12-25 10:08 ` Andrei Gaponenko
2009-12-25 10:32 ` Dave Airlie
2009-12-25 10:44 ` Andrei Gaponenko
2009-12-25 12:35 ` Dr. David Alan Gilbert
2009-12-26 18:57 ` Alex Deucher
2009-12-25 10:21 ` intel hda regression: 2.6.33-rc{1,2}: hd-audio0 eats 25% CPU (according to top) Sergei Trofimovich
2009-12-25 11:18 ` Takashi Iwai [this message]
2009-12-25 14:25 ` Sergei Trofimovich
2009-12-25 15:31 ` Maciej Rutecki
2009-12-25 16:05 ` Takashi Iwai
2009-12-25 16:32 ` Sergei Trofimovich
2009-12-25 17:06 ` Takashi Iwai
2009-12-25 18:00 ` Sergei Trofimovich
2009-12-25 19:01 ` Maciej Rutecki
2009-12-25 21:59 ` Takashi Iwai
2009-12-25 16:44 ` Maciej Rutecki
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