On 05/10/2015 07:39 AM, H. S. Teoh via Digitalmars-d wrote:
I also just realized that on Posix the profiling code apparently relies
on the rdtsc instruction, which counts CPU cycles in a 64-bit counter --
given the high frequencies of modern CPUs, moderately long-running
CPU-intensive processes easily overflow this counter, leading to
wrapped-around timing values and completely garbled output.
gprof, for all of its flaws, does not suffer from this problem.
http://www.wolframalpha.com/input/?i=2^64%2F%289+GHz%29
What am I missing?
