Am 31.08.2015 um 17:10 schrieb Florian Krohm:
> On 28.08.2015 09:03, Josef Weidendorfer wrote:
>
>> This suggests we should document the difference between
>> START/STOP_INSTRUMENTAITON
>> and TOGGLE_COLLECT better.
>
> Hmm, yes :) Any chance you can write something up in time for 3.11 ?
This is about Section 6.2.2 "Limiting the range of collected events"
in the Callgrind part of Valgrind's manual.
I just rephrased this section. Can you check if this is clearer now?
It should also make clear why switching instrumentation mode often can
get very slow.
>> With macros in C, the compiler can reorder stuff, so you may end up with
>> something like
>
> Huh? CALLGRIND_START_INSTRUMENTATION expands into a statement sequence
> that includes
> __asm__ volatile("whatever" ::: "memory");
Oops, I stay corrected.
Josef
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