Options for FBSD support with LCD device - new project [[Maybe related: I2c issues on the Pi2]]

[Ian Lepore]

On Mon, 2019-03-25 at 14:25 -0500, Karl Denninger wrote:
> On 3/25/2019 12:37, Ian Lepore wrote:
> > > > 
> > > [...]
> > 
> > Apply this patch...
> > 
> > 
https://svnweb.freebsd.org/base/head/sys/kern/kern_intr.c?view=patch&r1=345475&r2=345474&pathrev=345475
> > 
> > -- Ian
> 
> Here's where it's coming from:
> 
> root at rpi2:~ # vmstat -i
> interrupt                                             total       rate
> local_intc0,1:-mer0                                   80944       1361
> local_intc0,3:-mer0                                32210287     541604
> local_intc0,8:-ntc0                                  888341      14937
> local_intc0,9: pmu0                                       2          0
> intc0,1: mbox0                                           40          1
> intc0,2: vchiq0                                           2          0
> intc0,17:-x_dwcotg0                                 1242279      20888
> intc0,28: bcm_dma0                                    74686       1256
> intc0,61: iichb0                                          1          0
> intc0,65: uart0                                        1856         31
> intc0,70:-dhci_bcm0                                    8952        151
> cpu0:rendezvous                                          13          0
> cpu1:rendezvous                                          14          0
> cpu2:rendezvous                                          15          0
> cpu3:rendezvous                                          18          0
> cpu2:ast                                                  1          0
> cpu0:preempt                                           3167         53
> cpu1:preempt                                          13062        220
> cpu2:preempt                                          11133        187
> cpu0:hardclock                                            2          0
> Total                                              34534815     580690
> 
> 

We really need to change the name of the local_intc controller to
something shorter.  I'm going to venture a guess that -mer0 is
'timer0'.  That leads to the question of whether the driver is broken
somehow, or whether some callout is being scheduled for a crazy-high
rate.

-- Ian