[PATCH v2] libgfortran: Replace mutex with rwlock

This patch try to introduce the rwlock and split the read/write to unit_root tree and unit_cache with rwlock instead of the mutex to increase CPU efficiency. In the get_gfc_unit function, the percentage to step into the insert_unit function is around 30%, in most instances, we can get the unit in t

Re: [PATCH v2] libgfortran: Replace mutex with rwlock

Hi Lipeng, This patch try to introduce the rwlock and split the read/write to unit_root tree and unit_cache with rwlock instead of the mutex to increase CPU efficiency. In the get_gfc_unit function, the percentage to step into the insert_unit function is around 30%, in most instances, we can get

[PATCH] libgfortran: Replace mutex with rwlock

> libstdc++ implements shared mutex with pthread_rwlock, which can > libstdc++ conflict > with the pthread_rwlock usage in libgcc. Lipeng, please limit the > pthread_rwlock usage in libgcc only when __cplusplus isn't defined. > > > -- > H.J. Thanks for suggestion, send a V2 patch. -- Lipeng

RE: [PATCH v2] libgfortran: Replace mutex with rwlock

> Hi Lipeng, > > This patch try to introduce the rwlock and split the read/write to > > unit_root tree and unit_cache with rwlock instead of the mutex to > > increase CPU efficiency. In the get_gfc_unit function, the percentage > > to step into the insert_unit function is around 30%, in most >