On 08/17/16 23:15, Jeff Law wrote:
On 08/12/2016 07:31 AM, Martin Liška wrote:
On 08/09/2016 09:03 PM, Andi Kleen wrote:
It could potentially make things a lot slower. I don't think it's a good
idea to do this by default.
-Andi
Ok, alternative can be a warning in the driver that would inform a user
that combining -pthread and -fprofile-update=single can lead to profile
corruption.
My first attempt with option handling gcc.c was not successful, I'll try it
once.
Is it reasonable approach?
I'd prefer to make updates atomic in multi-threaded applications. The best
proxy we have for that is -pthread.
Is it slower, most definitely, but odds are we're giving folks garbage data
otherwise, which in many ways is even worse.
True, and if someone cares they can always override the new default behaviour.
nathan
