Re: [dpdk-dev] [PATCH v6 3/7] eal: add power monitor for multiple events

["Kinsella, Ray" <mdr@ashroe.eu>]

On 05/07/2021 16:21, Anatoly Burakov wrote:
> Use RTM and WAITPKG instructions to perform a wait-for-writes similar to
> what UMWAIT does, but without the limitation of having to listen for
> just one event. This works because the optimized power state used by the
> TPAUSE instruction will cause a wake up on RTM transaction abort, so if
> we add the addresses we're interested in to the read-set, any write to
> those addresses will wake us up.
> 
> Signed-off-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
> Signed-off-by: Anatoly Burakov <anatoly.burakov@intel.com>
> ---
> 
> Notes:
>     v4:
>     - Fixed bugs in accessing the monitor condition
>     - Abort on any monitor condition not having a defined callback
>     
>     v2:
>     - Adapt to callback mechanism
> 
>  doc/guides/rel_notes/release_21_08.rst        |  2 +
>  lib/eal/arm/rte_power_intrinsics.c            | 11 +++
>  lib/eal/include/generic/rte_cpuflags.h        |  2 +
>  .../include/generic/rte_power_intrinsics.h    | 35 +++++++++
>  lib/eal/ppc/rte_power_intrinsics.c            | 11 +++
>  lib/eal/version.map                           |  3 +
>  lib/eal/x86/rte_cpuflags.c                    |  2 +
>  lib/eal/x86/rte_power_intrinsics.c            | 73 +++++++++++++++++++
>  8 files changed, 139 insertions(+)
> 

Acked-by: Ray Kinsella <mdr@ashroe.eu>