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Re: [PATCH v2] Add malloc micro benchmark
On 04/01/2018 11:48, Wilco Dijkstra wrote:
> Carlos O'Donell wrote:
>>
>> Don't use mallopt, please make it a tunable then.
>>
>> The mallopt API already had 2 secret arena options which eventually became
>> so well used they were baked into the API and had to be made public.
>
> Unfortunately tunables are not exported so you can't use them outside of GLIBC:
>
> /build/glibc/benchtests/bench-malloc-simple.o: In function `bench':
> bench-malloc-simple.c:(.text+0x19c): undefined reference to `__tunable_set_val'
> collect2: error: ld returned 1 exit status
>
> Wilco
>
You will need to the environment variable to check outside GLIBC (as expected
by normal programs).