[dpdk-dev] [EXT] [PATCH v3 5/5] config: add WFE config entry for aarch64

[Jerin Jacob Kollanukkaran]

> -----Original Message-----
> From: Gavin Hu <gavin.hu at arm.com>
> Sent: Tuesday, July 23, 2019 9:14 PM
> To: dev at dpdk.org
> Cc: nd at arm.com; thomas at monjalon.net; stephen at networkplumber.org;
> Jerin Jacob Kollanukkaran <jerinj at marvell.com>; Pavan Nikhilesh
> Bhagavatula <pbhagavatula at marvell.com>;
> Honnappa.Nagarahalli at arm.com; gavin.hu at arm.com
> Subject: [EXT] [PATCH v3 5/5] config: add WFE config entry for aarch64
> 
> Add the RTE_USE_WFE configuration entry for aarch64, disabled by default.
> It can be enabled selectively based on the performance benchmarking.
> 
> Signed-off-by: Gavin Hu <gavin.hu at arm.com>
> Reviewed-by: Ruifeng Wang <ruifeng.wang at arm.com>
> Reviewed-by: Steve Capper <steve.capper at arm.com>
> Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli at arm.com>
> Acked-by: Pavan Nikhilesh <pbhagavatula at marvell.com>
> 
> +# Use WFE instructions to implement the rte_wait_for_equal_xxx APIs, #
> +calling these APIs put the cores enter low power state while waiting #
> +for the memory address to be become equal to the expected value.
> +# This is supported only by aarch64.
> +CONFIG_RTE_USE_WFE=n

# If it specific for arm and none of the other architectures supports it then
I would like to change the config as CONFIG_RTE_ARM_USE_WFE
# Even if it is disabled, have the =n entry in config/common_base to know
all supported configs in DPDK in one place.
# Arrange all CONFIG_RTE_ARM_* together in config/common_base