too many interupts/sec

[Hidetoshi Shimokawa]

This is expected. It looks like the interrupt source is other than
fwohci. From your dmesg, drm0 allocates a IRQ but no interrpt has
been recorded in your vmstat output. Is this normal?

I assume some interrupt source has been wrongly routed to the same irq as
fwohci but I may be wrong.

/\ Hidetoshi Shimokawa
\/  simokawa at sat.t.u-tokyo.ac.jp
PGP public key: http://www.sat.t.u-tokyo.ac.jp/~simokawa/pgp.html


At Mon, 9 Feb 2004 18:22:16 +0100,
Petr Holub wrote:
> 
> > If you don't mind, can you change "#undef OHCI_DEBUG"
> > to "#define OHCI_DEBUG" in /sys/dev/firewire/fwohci.c?
> > It must generate much of output in the storm...
> 
> Sure. I've enabled it and did make && make install in my compile
> tree and rebooted (to be sure). Interestingly enough, I don't get
> storm of messages after I load the module and start X. It goes
> like this:
> 
> # kldload firewire
> fwohci0: <Texas Instruments TSB12LV26> mem 0xfe1f8000-0xfe1fbfff,0xfe1ff000-0xfe
> 1ff7ff irq 16 at device 12.0 on pci4
> fwohci0: OHCI version 1.0 (ROM=0)
> fwohci0: No. of Isochronous channel is 4.
> fwohci0: EUI64 80:74:08:00:65:45:39:00
> fwohci0: Phy 1394a available S400, 2 ports.
> fwohci0: Link S400, max_rec 2048 bytes.
> firewire0: <IEEE1394(FireWire) bus> on fwohci0
> fwohci0: Initiate bus reset
> fwohci0: INTERRUPT < PHY_REG BUS_RESET SID DMA_PRRQ > 0x04030010, 0x81030133
> fwohci0: BUS reset
> fwohci0: node_id=0xc800ffc0, gen=1, CYCLEMASTER mode
> firewire0: 1 nodes, maxhop <= 0, cable IRM = 0 (me)
> firewire0: bus manager 0 (me)
> fwohci0: INTERRUPT < CYC_START DMA_ATRQ > 0x00100001, 0x81030133
> # startx
> drm0: <Matrox G550 (AGP)> mem 0xfd000000-0xfd7fffff,0xfdefc000-0xfd
> efffff,0xf8000000-0xf9ffffff irq 11 at device 0.0 on pci1
> info: [drm] AGP at 0xf0000000 128MB
> info: [drm] Initialized mga 3.1.0 20021029 on minor 0
> drm0: [MPSAFE]
> 
> (and X goes up)
> 
> and nothing more except for systat showing something like 95000 interrupts
> per second for fwohci in vmstat. BTW: note that there is nothing connected
> to any firewire port at the moment.
> 
> Petr
> 
> 
> 
> ================================================================
>                             Petr Holub
> CESNET z.s.p.o.                       Supercomputing Center Brno
> Zikova 4                             Institute of Compt. Science
> 162 00 Praha 6, CZ                            Masaryk University
> Czech Republic                     Botanicka 68a, 60200 Brno, CZ
> e-mail: Petr.Holub at cesnet.cz               phone: +420-549493944
>                                              fax: +420-541212747
>                                        e-mail: hopet at ics.muni.cz
> 
>