Re: arm ldxr/stxr vs cas

On 9/11/24 00:15, Paul A. Clayton wrote:

On 9/9/24 3:14 AM, Terje Mathisen wrote:

jseigh wrote:

In software there's a large body of lock-free data structures
using various deferred reclamation schemes, RCU, hazard pointers,
etc...  RCU has zero read access cost overhead, hazard pointers
have almost zero cost, about 3x the cost of a pipelined load.
Hazard pointers got a lot faster when need for a store/load memory
barrier was gotten rid of.