RTEMS | cpukit: Create DHRL Library for DRAM Latency Mitigation (!1193)
Wayne Thornton (@wmthornton-dev)
gitlab at rtems.org
Thu May 21 02:52:31 UTC 2026
Wayne Thornton commented on a discussion on cpukit/dhrl/dhrl.c: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/1193#note_150649
> + next_epoch,
> + memory_order_release
> + );
> +
> + rtems_barrier_wait( ctx->start_barrier, RTEMS_NO_TIMEOUT );
> +
> + /* Spin utilizing the architecture-specific _CPU_Pause_speculation instruction hook */
> + while (
> + atomic_load_explicit( &ctx->winning_data_ptr, memory_order_acquire ) ==
> + (uintptr_t) NULL
> + ) {
> + _CPU_Pause_speculation();
> + }
> +
> + winning_result = (volatile void *)
> + atomic_load_explicit( &ctx->winning_data_ptr, memory_order_acquire );
Done. Will be pushed in next commit.
--
View it on GitLab: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/1193#note_150649
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