power consumption issues :)

[hirakendu das]

Firstly, there are no differences in my good and bad lspci outputs :(.

Secondly, what Kelly observes might still be ok - about 2500 interrupts per second. When I use my wireless connection to download at say 1 or 2 MB/s, I do get about 4000 interrupts per second. And these 4000 are not 'phantom' interrupts as I do see usb and ipw3945 come up in the top of the list accounting for most of those 4000. In the second case when I see 22k per second, there is nothing that shows up - its in fact the same as when its at 150 per second. So  Kelly, when you get 2500 interrupts per second are these 'phantom' like in my bad state, or is there something in the powertop list that accounts for these.

Thanks,
Hirakendu.


Arjan van de Ven <arjan at linux.intel.com> wrote: Kelly Anderson wrote:
> 
> I've attached lspci.good where wakeups are about 50/sec and lspci.bad 
> where wakeups are about 2400.  I've also attached my kernel config just 
> in case that's useful.
> 


> 
> 00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI Controller (rev 02) (prog-if 20 [EHCI])
>  Subsystem: Toshiba America Info Systems Unknown device ff00
>  Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
>  Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- SERR- 

>  Latency: 0
>  Interrupt: pin A routed to IRQ 19
>  Region 0: Memory at d8444000 (32-bit, non-prefetchable) [size=1K]
>  Capabilities: [50] Power Management version 2
>   Flags: PMEClk- DSI- D1- D2- AuxCurrent=375mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
>   Status: D0 PME-Enable- DSel=0 DScale=0 PME-

ok interesting; there are 2 differences in the 2 files, the most 
important one being the PME- -> PME+ change. I wonder if Linux isn't 
doing something it should be doing; I'll investigate this more 
tomorrow when it's a more reasonable hour..



       
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