On Thu, 22 Jun 2023, "Paul E. McKenney" <paul...@kernel.org> wrote:
> I suggest C11 volatile atomic load/store. Load/store fusing is permitted > for non-volatile atomic loads and stores, and such fusing can ruin your > code's entire day. ;-) Good catch. Seems like not a problem on GCC (yet), but Clang is extremely aggressive and seems to do store fusing on some corner cases [0]. However, I do not find any simple reproducer of load/store fusing. Do you have example of such fusing, or is this a precaution? In the meantime, back to reading the standard to be certain :-) [0] https://godbolt.org/z/odKG9a75a -- Olivier Dion EfficiOS Inc. https://www.efficios.com _______________________________________________ lttng-dev mailing list lttng-dev@lists.lttng.org https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
