Messages in this thread | | | Date | Mon, 21 Nov 2016 12:44:45 -0800 | From | Andi Kleen <> | Subject | Re: [BUG] msr-trace.h:42 suspicious rcu_dereference_check() usage! |
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> > 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
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