From: Thomas Monjalon <thomas@monjalon.net>
To: Ruifeng Wang <Ruifeng.Wang@arm.com>
Cc: David Marchand <david.marchand@redhat.com>, dev <dev@dpdk.org>,
"jerinj@marvell.com" <jerinj@marvell.com>, nd <nd@arm.com>,
Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>
Subject: Re: [dpdk-dev] Use WFE for spinlock and ring
Date: Wed, 28 Apr 2021 13:13:33 +0200 [thread overview]
Message-ID: <2370044.79WzprfWfc@thomas> (raw)
In-Reply-To: <AM5PR0802MB2465754871929304F7F7E3859E409@AM5PR0802MB2465.eurprd08.prod.outlook.com>
28/04/2021 11:30, Ruifeng Wang:
> From: David Marchand <david.marchand@redhat.com>
> > On Sun, Apr 25, 2021 at 7:57 AM Ruifeng Wang <ruifeng.wang@arm.com>
> > wrote:
> > >
> > > The rte_wait_until_equal_xxx APIs abstract the functionality of
> > > 'polling for a memory location to become equal to a given value'[1].
> > >
> > > Use the API for the rte spinlock and ring implementations.
> > > With the wait until equal APIs being stable, changes will not impact ABI.
> >
> > Afaics, there is no ARM target with WFE enabled and we lost ability to enable
> > WFE support with removal of the make build system.
>
> WFE can be enabled with direct meson file change.
> WFE is not intended to be enabled by default. It can be enabled based on benchmarking
> result on hardware.
> >
> > $ git grep RTE_ARM_USE_WFE
> > config/arm/meson.build: ['RTE_ARM_USE_WFE', false],
> > lib/eal/arm/include/rte_pause_64.h:#ifdef RTE_ARM_USE_WFE
> >
> > How did you enable WFE to test this series?
>
> I modified meson file to test.
> Tests were also done with WFE disabled to make sure no degradation with generic implementation.
I don't understand the usage.
Which platform should use it?
Should it be a compile-time option?
next prev parent reply other threads:[~2021-04-28 11:13 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-24 7:07 [dpdk-dev] [PATCH v1 0/2] " Gavin Hu
2020-04-24 7:07 ` [dpdk-dev] [PATCH v1 1/2] spinlock: use wfe to reduce contention on aarch64 Gavin Hu
2020-04-24 7:07 ` [dpdk-dev] [PATCH v1 2/2] ring: use wfe to wait for ring tail update " Gavin Hu
2020-04-24 13:23 ` Ananyev, Konstantin
2020-04-26 8:41 ` Gavin Hu
2020-04-24 14:46 ` Honnappa Nagarahalli
2020-04-26 8:33 ` Gavin Hu
2020-04-26 8:39 ` [dpdk-dev] [PATCH v2 0/2] Use WFE for spinlock and ring Gavin Hu
2020-05-01 9:47 ` Ananyev, Konstantin
2020-05-03 14:54 ` David Marchand
2020-05-03 21:31 ` Honnappa Nagarahalli
2020-09-25 14:30 ` David Marchand
2021-03-25 14:58 ` David Marchand
2021-04-25 6:06 ` Ruifeng Wang
2021-04-25 15:56 ` Thomas Monjalon
2020-04-26 8:39 ` [dpdk-dev] [PATCH v2 1/2] spinlock: use wfe to reduce contention on aarch64 Gavin Hu
2020-04-28 12:22 ` Jerin Jacob
2020-04-26 8:39 ` [dpdk-dev] [PATCH v2 2/2] ring: use wfe to wait for ring tail update " Gavin Hu
2021-04-25 5:56 ` [dpdk-dev] Use WFE for spinlock and ring Ruifeng Wang
2021-04-25 5:56 ` [dpdk-dev] [PATCH v3 1/2] spinlock: use wfe to reduce contention on aarch64 Ruifeng Wang
2021-04-25 5:56 ` [dpdk-dev] [PATCH v3 2/2] ring: use wfe to wait for ring tail update " Ruifeng Wang
2021-04-26 5:38 ` Jerin Jacob
2021-04-28 17:17 ` Stephen Hemminger
2021-04-29 14:35 ` Ruifeng Wang
2021-04-29 15:05 ` Stephen Hemminger
2021-05-07 8:25 ` Ruifeng Wang
2021-04-28 7:42 ` [dpdk-dev] Use WFE for spinlock and ring David Marchand
2021-04-28 9:30 ` Ruifeng Wang
2021-04-28 11:13 ` Thomas Monjalon [this message]
2021-04-29 14:28 ` Ruifeng Wang
2021-04-29 15:20 ` Thomas Monjalon
2021-04-30 9:16 ` Bruce Richardson
2021-04-30 13:41 ` Honnappa Nagarahalli
2021-04-30 14:19 ` Bruce Richardson
2021-05-07 10:18 ` Ruifeng Wang
2021-05-07 10:24 ` Bruce Richardson
2021-07-05 8:51 ` David Marchand
2021-07-05 10:21 ` Ruifeng Wang
2021-07-07 14:47 ` Stephen Hemminger
2021-07-08 9:41 ` Ruifeng Wang
2021-07-08 16:58 ` Honnappa Nagarahalli
2021-07-07 5:43 ` [dpdk-dev] [PATCH v4 0/3] " Ruifeng Wang
2021-07-07 5:43 ` [dpdk-dev] [PATCH v4 1/3] spinlock: use wfe to reduce contention on aarch64 Ruifeng Wang
2021-07-07 5:43 ` [dpdk-dev] [PATCH v4 2/3] ring: use wfe to wait for ring tail update " Ruifeng Wang
2021-07-07 5:43 ` [dpdk-dev] [PATCH v4 3/3] build: add option to enable wait until equal Ruifeng Wang
2021-07-07 12:15 ` David Marchand
2021-07-07 5:48 ` [dpdk-dev] [PATCH v4 0/3] Use WFE for spinlock and ring Ruifeng Wang
2021-07-07 5:48 ` [dpdk-dev] [PATCH v4 1/3] spinlock: use wfe to reduce contention on aarch64 Ruifeng Wang
2021-07-07 5:48 ` [dpdk-dev] [PATCH v4 2/3] ring: use wfe to wait for ring tail update " Ruifeng Wang
2021-07-07 5:48 ` [dpdk-dev] [PATCH v4 3/3] build: add option to enable wait until equal Ruifeng Wang
2021-07-07 6:32 ` Thomas Monjalon
2021-07-07 6:46 ` Ruifeng Wang
2021-07-07 12:27 ` Bruce Richardson
2021-07-07 12:36 ` Jerin Jacob
2021-07-08 6:25 ` Ruifeng Wang
2021-07-08 6:32 ` Jerin Jacob
2021-07-08 7:32 ` Thomas Monjalon
2021-07-08 9:21 ` Ruifeng Wang
2021-07-08 10:28 ` Thomas Monjalon
2021-07-09 18:39 ` [dpdk-dev] [PATCH v4 0/3] Use WFE for spinlock and ring Thomas Monjalon
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