Runtime discrepancy clock_gettime + funcition instrumentation

[Florian Weimer]

* Christian Weiss:

> Measuring the runtime, the static binary takes about five times more time to finish than the dynamic one. I do not yet understand this observation:
>
> [cweiss@amd022 overhead]$ time ./test_time_static_gcc.x 10000000
> sum: 49999995000000
> real         0m2.594s
> user        0m0.396s
> sys           0m2.197s
> [cweiss@amd022 overhead]$ time ./test_time_dyn_gcc.x 10000000
> sum: 49999995000000
>
> real         0m0.518s
> user        0m0.515s
> sys           0m0.002s

Have you checked that the statically linked version uses vDSO
acceleration instead of system calls?

Thanks,
Florian