Re: glibc THREAD_GSCOPE and excessive gsync_wake ()

[Samuel Thibault]

Hello,

Don't bother looking at the existing implementation, its roots dates
before we really had gsync working.

Sergey Bugaev, le sam. 08 mai 2021 22:35:23 +0300, a ecrit:
> +  do \
> +    { \
> +      int count; \
> +      count = atomic_exchange_and_add_rel (&GL(dl_thread_gscope_count), -1); 
> \

While at it, rather try to reproduce the other archs' behavior: use
gscope_flag from the tcb, and switch THREAD_GSCOPE_IN_TCB to 1. That
will make the implementation much simpler and scalable.

Samuel