Anton Blanchard <an...@samba.org> writes:
> Hi,
>
>> > ebizzy with -S 30 -t 1 -P gave
>> > 13627 records/s -> Without patch
>> > 13546 records/s -> With patch with tracepoint disabled
>>
>> OK. So that's about -0.6%. Are we happy with that? I'm not sure.
>>
>> Can you do a few more runs and see if that's a stable result.
>
> Surprisingly large. Is CONFIG_JUMP_LABEL enabled? That should reduce the
> tracepoint to just a nop.
yes. We do use jump label. I also verified that looking at .s
#APP
# 23 "./arch/powerpc/include/asm/jump_label.h" 1
1:
nop
.pushsection __jump_table, "aw"
.llong 1b, .L201, __tracepoint_hash_fault+8 #,
.popsection
# 0 "" 2
.....
-aneesh
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