Binding timer interrupt to a cpu core

[Ivan Voras]

Barney Cordoba wrote:
> Is there a way in 7.1 to bind a timer software interrupt? I see cpuset for userland threads, but its not clear how to do it within the kernel.

Each CPU already has its own timer ticking:

    3 users    Load  0.00  0.00  0.00                  Jan 21 12:36

Mem:KB    REAL            VIRTUAL                       VN PAGER   SWAP
PAGER
        Tot   Share      Tot    Share    Free           in   out     in
  out
Act 2152484   21140  2945416    46804  169412  count
All 2267140   25916  7497096    71436          pages
Proc:                                                            Interrupts
  r   p   d   s   w   Csw  Trp  Sys  Int  Sof  Flt     19 cow    3204 total
          6 170       476  213  119    4  147  203    101 zfod
atkbd0 1
                                                          ozfod
ata0 irq14
 0.1%Sys   0.1%Intr  0.0%User  0.0%Nice 99.8%Idle        %ozfod     1
ciss0 uhci
|    |    |    |    |    |    |    |    |    |    |       daefr
uhci4 22
                                                      118 prcfr   400
cpu0: time
                                        51 dtbuf      173 totfr     3
bce0 256
Namei     Name-cache   Dir-cache    100000 desvn          react   400
cpu5: time
   Calls    hits   %    hits   %     83412 numvn          pdwak   400
cpu7: time
      33      28  85       1   3     24999 frevn          pdpgs   400
cpu6: time
                                                          intrn   400
cpu3: time
Disks   da0 pass0                                  478268 wire    400
cpu4: time
KB/t  18.00  0.00                                 2240976 act     400
cpu2: time
tps       2     0                                 1131116 inact   400
cpu1: time
MB/s   0.04  0.00                                  129228 cache
%busy     0     0                                   40184 free


Interrupts can be bound to CPUs but only by using APIs within the kernel
(there's no userland utility for it).

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