kthread/kproc diff 2

[Julian Elischer]

This time with the pointer to the diff:

 http://www.freebsd.org/~julian/kthread.diff

not that this diff makes tow new kprocs, one called idled 
(to which it assigns all the idle threads) and one called interd
(to which it assigns all the interrupt threads)
This is mainly just for aesthetic reasons. It looked silly to always have
the kernel thread at 398% when nothing was happening, 
where it looks more understandable if the idled is showing 398%.
A for the interrupts, well, it was low hanging fruit and it was
easy to do. Once this is committed I (or others) can move other 
kprocs over to being kthreads as time permits...

BTW specifying no kproc to put a new kthread into will result
in the default behaviour of putting it into proc0.
which has a process name of "kernel" now. 
(along with a thread called "swapper")




Julian Elischer wrote:
> newest version..
> 
> this version has been tested somewhat, and adds a new function.
> the new function, when given a pointer to a pointer to a proc, will
> make a new kproc when the proc * is NULL (i.e. the first time it is called)
> and fill it in, and therafter, add new kthreads to that process.
> 
> it has a rather clumsy name of kproc_kthread_create, so if you don't
> like it sugeest something better.. it uses kproc_create and kthread_create.
> 
> after applying this patch top -SH shows the following:
> 
> last pid: 35036;  load averages:  0.24,  0.05,  0.09    up 0+08:15:52  
> 23:04:13
> 85 processes:  5 running, 62 sleeping, 18 waiting
> CPU states:  0.1% user,  0.0% nice,  0.0% system,  0.0% interrupt, 99.9% 
> idle
> Mem: 39M Active, 792M Inact, 138M Wired, 1060K Cache, 112M Buf, 2038M Free
> Swap: 6144M Total, 6144M Free
> 
>  PID USERNAME PRI NICE   SIZE    RES STATE  C   TIME   WCPU COMMAND
>   10 root     171 ki31     0K    32K CPU3   3  30.3H 98.97% {idle: cpu3}
>   10 root     171 ki31     0K    32K CPU2   2  30.3H 98.97% {idle: cpu2}
>   10 root     171 ki31     0K    32K CPU0   0  30.3H 98.58% {idle: cpu0}
>   10 root     171 ki31     0K    32K RUN    1  30.3H 98.14% {idle: cpu1}
>   25 root      20    -     0K     8K syncer 2   2:12  0.73% syncer
>   11 root     -32    -     0K   136K WAIT   0  15:55  0.54% {swi4: clock sio}
>   11 root     -24    -     0K   136K WAIT   0  15:55  0.00% {swi6: Giant task}
>   11 root     -24    -     0K   136K WAIT   1  15:55  0.00% {swi6: task queue}
>   11 root     -28    -     0K   136K WAIT   2  15:55  0.00% {swi5: +}
>   11 root     -36    -     0K   136K WAIT   0  15:55  0.00% {swi3: vm}
>   11 root     -40    -     0K   136K WAIT   0  15:55  0.00% {swi2: cambio}
>   11 root     -44    -     0K   136K WAIT   0  15:55  0.00% {swi1: net}
>   11 root     -48    -     0K   136K WAIT   0  15:55  0.00% {swi0: uart sio}
>   11 root     -52    -     0K   136K WAIT   0  15:55  0.00% {irq9: acpi0}
>   11 root     -60    -     0K   136K WAIT   0  15:55  0.00% {irq12: psm0}
>   11 root     -60    -     0K   136K WAIT   0  15:55  0.00% {irq1: atkbd0}
>   11 root     -64    -     0K   136K WAIT   0  15:55  0.00% {irq5: ohci0}
>   11 root     -64    -     0K   136K WAIT   0  15:55  0.00% {irq15: ata1}
>   11 root     -64    -     0K   136K WAIT   0  15:55  0.00% {irq14: ata0}
>   11 root     -68    -     0K   136K WAIT   0  15:55  0.00% {irq28: bge0}
>   11 root     -68    -     0K   136K WAIT   0  15:55  0.00% {irq20: fxp0}
>   11 root     -68    -     0K   136K WAIT   0  15:55  0.00% {irq29: bge1}
>   19 root     -68    -     0K     8K -      2   4:56  0.00% dummynet
>   12 root     -16    -     0K     8K -      1   0:16  0.00% yarrow
>    2 root      -8    -     0K     8K -      2   0:06  0.00% g_event
>    3 root      -8    -     0K     8K -      2   0:05  0.00% g_up
> [etc]
> 
> 
> top -S just shows:
> 
> last pid: 35040;  load averages:  0.09,  0.04,  0.08    up 0+08:16:48  
> 23:05:09
> 85 processes:  5 running, 62 sleeping, 18 waiting
> CPU states:  0.1% user,  0.0% nice,  0.0% system,  0.0% interrupt, 99.9% 
> idle
> Mem: 39M Active, 792M Inact, 138M Wired, 1060K Cache, 112M Buf, 2038M Free
> Swap: 6144M Total, 6144M Free
> 
>  PID USERNAME  THR PRI NICE   SIZE    RES STATE  C   TIME   WCPU COMMAND
>   10 root        4 171 ki31     0K    32K CPU0   0  30.3H 396.09% idled
>   11 root       17 -60    -     0K   136K WAIT   0  15:56  0.00% interd
>   19 root        1 -68    -     0K     8K -      2   4:56  0.00% dummynet
>   25 root        1  20    -     0K     8K syncer 1   2:12  0.00% syncer
> [etc]
> 
> other current kprocs can be turned into kthreads with minimal
> (usually a few seconds) edits
> 
> note kthread_create() has grown an extra argument, a struct proc *
> that is used to tell it which kproc to add the thread to.
> 
> 
> comments?
> code-reviews?
> 
>   ps -auxH -Otdnam gives output different from what I'd expect
> and strange messages appear on the console. so comments on that
> (the ps diffs) are definitly requested.
> 
> 
> 
> 
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