回复: [PATCH v5 0/2] Enable PMD power management on Arm

[Feifei Wang <Feifei.Wang2@arm.com>]

> -----邮件原件-----
> 发件人: Feifei Wang <feifei.wang2@arm.com>
> 发送时间: Wednesday, December 14, 2022 4:14 PM
> 抄送: dev@dpdk.org; nd <nd@arm.com>; Feifei Wang
> <Feifei.Wang2@arm.com>
> 主题: [PATCH v5 0/2] Enable PMD power management on Arm
> 
> For Arm aarch, use WFE instructions to enable PMD power management.
> 
> Test Results:
> dynamic instructions over 1sec	without wfe	with wfe	percentage
> ampere-altra			6,298,483,712	9,117,624	-99.855%
> thunderx2			6,990,909,373	3,247,226	-99.954%
> 
> When power efficient PMD is enabled by using WFE on Arm, if no pkts
> received, the instructions that CPU executes is reduced by 99%.
> 
> V2:
> 1. move rte_wake_up API out of signal_exit(David Marchand, Thomas,
> Stephen) 2. Add test results when using wfe on ARM server
> 
> v3:
> 1. make code cleaner (Stephen)
> 
> v4:
> 1. add support check in API (Thomas)
> 
> v5:
> 1. delete v4 check patch and l3fwd-power change. This is due to that WFE
> instructions can be applied into all lcores.
> When all cores are in 'WFE' state, kernal can run normally and receive
> interrupt signal to send it to the l3fwd-power thread.
> Thus core in 'WFE' state can exit from sleeping by interrupt event.
> 
> 
> Feifei Wang (2):
>   eal: add 8 bits case for wait scheme
>   eal: add power mgmt support on Arm
> 
>  lib/eal/arm/include/rte_pause_64.h | 32 +++++++++++--
>  lib/eal/arm/rte_cpuflags.c         |  5 +++
>  lib/eal/arm/rte_power_intrinsics.c | 72
> ++++++++++++++++++++++++++++--
>  3 files changed, 102 insertions(+), 7 deletions(-)
> 
> --
> 2.25.1

+ping

Would the maintainers help review this patch?
Thanks very much~

Best Regards
Feifei