Why is the performance of 32bit program worse than 64bit program running on the same 64bit system, They are compiled from same source. Which gcc option can fix it?

[Andrew Haley]

On 03/25/2014 03:31 AM, Xinrong Fu wrote:
>    What does the number of stalled cycles in the CPU pipeline frontend
> means? Why is the stalled frontend cycles of 32bit program more than
> 64bit program's stalled cycles when they running on same 64bit system?
> Is there any gcc options to fix it?

What is the test case?

Andrew.