Re: [BUG] msr-trace.h:42 suspicious rcu_dereference_check() usage!

[Andi Kleen]

> > http://halobates.de/tracepoint-trace
> 
> There's a lot of push and pop regs due to function calling. There's
> places that inlines can still improve things, and perhaps even some
> likely unlikelys well placed.

Assuming you avoid all the push/pop and all the call/ret this would only be
~25% of the total instructions. There is just far too much logic and
computation in there.

% awk ' { print $5 } '  tracepoint-trace | sort | uniq -c | sort -rn
    222 mov
     57 push
     57 pop
     35 test
     34 cmp
     32 and
     28 jz
     25 jnz
     21 ret
     20 call
     16 lea
     11 add

-Andi