[ath9k-devel] still same problem

[W. van den Akker <listsrv@wilsoft.nl>]

On Wednesday 21 January 2009, Jouni Malinen wrote:
> On Wed, 2009-01-21 at 02:11 -0800, W. van den Akker wrote:
> > I have tested with 1 CPU disabled. Running now for about 2 hours without
> > hangups (I have several connection drops, but it will reconnect).
> >
> > I have also tested with 2 CPU's and HT-disabled (noht parameter) but that
> > had no effect.
> >
> > So SMP looks like the cause of the problem here.
>
> Thanks for testing this! I'm running most of my tests with a dual core
> system, so SMP is being used, but with two cores, not two separate
> chips. I don't think there should be much difference there, but
> certainly our hardware configuration is different.
>
> Could you please describe your hardware with more details so that we can
> see whether we could find a similar system to try to reproduce this? Is
> this the IBM 206 eserver with WMP300N you mentioned in an earlier
> message in the thread? That seems to be (by default) a uni-processor
> setup, so I would like to make sure we understand what is the exact
> hardware used here since I do not think we have been able to reproduce
> this type of issue so far in any dual core systems.
>

Its indeed an IBM eServer x206 8482-2RX with a WMP300N (Linksys,  
Atheros Communications Inc. AR5416 802.11abgn Wireless PCI Adapter (rev 01).
The IBM is a dual-core system with 2 CPU's on one fysical CPU-chip (its boxed 
so I am not for sure).

/proc/cpuinfo shows (with one CPU disabled)
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 15
model           : 3
model name      : Intel(R) Pentium(R) 4 CPU 3.00GHz
stepping        : 4
cpu MHz         : 3000.473
cache size      : 1024 KB
physical id     : 0
siblings        : 1
core id         : 0
cpu cores       : 1
apicid          : 0
initial apicid  : 0
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 5
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca 
cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe constant_tsc 
up pebs bts pni dtes64 monitor ds_cpl cid xtpr
bogomips        : 6000.94
clflush size    : 64
power management:

lscpi -vvv for the adapter shows:
03:02.0 Network controller: Atheros Communications Inc. AR5416 802.11abgn 
Wireless PCI Adapter (rev 01)
        Subsystem: Linksys Device 0061
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr+ 
Stepping- SERR+ FastB2B- DisINTx-
        Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 168, Cache Line Size: 32 bytes
        Interrupt: pin A routed to IRQ 25
        Region 0: Memory@d0200000 (32-bit, non-prefetchable) [size=64K]
        Capabilities: [40] #80 [0000]
        Kernel driver in use: ath9k
        Kernel modules: ath9k

If more information is needed I am happy to provide.

Greetings,
Willem

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