ucom/uftdi high interrupt load

[Hans Petter Selasky]

On Tuesday 14 June 2011 02:58:44 Charles Sprickman wrote:
> On Mon, 13 Jun 2011, Hans Petter Selasky wrote:
> > On Sunday 12 June 2011 23:50:24 Charles Sprickman wrote:
> >> On Sun, 12 Jun 2011, Hans Petter Selasky wrote:
> >>> On Saturday 11 June 2011 23:43:11 Charles Sprickman wrote:
> > 
> > Ok, then those quirks won't help.
> > 
> > For OHCI, I guess you should check vmstat -i.
> 
> Oddly enough, the box paniced today, but it appeared to be related to fxp.
> However in the coredump summary, I have "vmstat -i" output, and ohci seems
> fairly high in comparison to everything else:
> 
> vmstat -i
> 
> interrupt                          total       rate
> irq4: uart0                          106          0
> irq10: ohci0                   142322001     968176
> irq14: ata0                         1178          8
> irq20: fxp0                      3008691      20467
> irq21: fxp1                      1733357      11791
> irq28: sym1                           30          0
> irq29: sym0                      2624749      17855
> cpu0: timer                    728063100    4952810
> cpu1: timer                    728044684    4952684
> Total                         1605797896   10923795
> 
> Also, just a brief summary of the panic, since it mentions the interrupt
> process again:

Hi,

The OHCI IRQ rate is too high. It should never exceed 1000 IRQ/s. Maybe you 
can build a kernel with "options USB_DEBUG", then run the following command 
and post some of the resulting dmesg:

sysctl hw.usb.ohci.debug=16 ; sleep 1; sysctl hw.usb.ohci.debug=0

--HPS

> 
> #7  0x8059139b in fxp_new_rfabuf (sc=0x8564c000, rxp=0x8564c1c0)
>      at /usr/src/sys/dev/fxp/if_fxp.c:2611
> #8  0x8059285b in fxp_intr (xsc=0x8564c000)
>      at /usr/src/sys/dev/fxp/if_fxp.c:1931
> #9  0x8067b1db in intr_event_execute_handlers (p=0x8553d7f8,
> ie=0x8557d080)
>      at /usr/src/sys/kern/kern_intr.c:1220
> #10 0x8067c8eb in ithread_loop (arg=0x856525d0)
>      at /usr/src/sys/kern/kern_intr.c:1233
> #11 0x80678f11 in fork_exit (callout=0x8067c880 <ithread_loop>,
>      arg=0x856525d0, frame=0xd80e7d38) at /usr/src/sys/kern/kern_fork.c:844
> #12 0x80931de0 in fork_trampoline () at
> /usr/src/sys/i386/i386/exception.s:270
> 
> And also unrelated to usb, but fairly bizarre "netstat -m" output:
> 
> 18446744073709550887/1355/626/25600 mbuf clusters in use
> (current/cache/total/max)
> 18014398509480560K/3497K/2073K bytes allocated to network
> (current/cache/total)
> 
> Sorry for all the extra noise, but I'm not adept enough at determining
> whether this panic was usb related or fxp related.
> 
> Thanks,
> 
> Charles
> 
> > --HPS