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From: David Marchand <david.marchand@redhat.com>
To: Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>
Cc: dev <dev@dpdk.org>, nd <nd@arm.com>,
	 "thomas@monjalon.net" <thomas@monjalon.net>,
	"jerinj@marvell.com" <jerinj@marvell.com>,
	 Ruifeng Wang <Ruifeng.Wang@arm.com>,
	Phil Yang <Phil.Yang@arm.com>,  Joyce Kong <Joyce.Kong@arm.com>,
	"Ananyev, Konstantin" <konstantin.ananyev@intel.com>
Subject: Re: [dpdk-dev] [PATCH v2 0/2] Use WFE for spinlock and ring
Date: Thu, 25 Mar 2021 15:58:12 +0100	[thread overview]
Message-ID: <CAJFAV8yDwmQoRypB+eyEE91_n4Hofey+B+QVSeTpvbB4TDdWrA@mail.gmail.com> (raw)
In-Reply-To: <CAJFAV8ybHRT4+kf-tMmmN1aJJy9GvXV2xtYe4eMpnBsKRUH1bA@mail.gmail.com>

Hello,

On Fri, Sep 25, 2020 at 4:30 PM David Marchand
<david.marchand@redhat.com> wrote:
>
> Hello Honnappa,
>
> On Sun, May 3, 2020 at 11:32 PM Honnappa Nagarahalli
> <Honnappa.Nagarahalli@arm.com> wrote:
> >
> > <snip>
> >
> > > Subject: Re: [PATCH v2 0/2] Use WFE for spinlock and ring
> > >
> > > On Sun, Apr 26, 2020 at 10:39 AM Gavin Hu <gavin.hu@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.
> > > >
> > > > [1] http://patches.dpdk.org/cover/62703/
> > > >
> > > > Gavin Hu (2):
> > > >   spinlock: use wfe to reduce contention on aarch64
> > > >   ring: use wfe to wait for ring tail update on aarch64
> > >
> > > This would result in rte_ring and rte_spinlock APIs becoming experimental
> > > and this breaks compilation for external applications using stable ring and
> > > spinlock APIs.
> > > IIRC, it was the reason why these patches were dropped with the introduction
> > > of the rte_wait_until_equal_* API.
> > Agreed, the rte_ring new sync modes are resulting in different use cases for these APIs. We need to take a relook at the APIs.
>
> Will we reconsider this series now that the wait until equal is going stable?

Any update?
I suppose this would need some rebasing after the ring library changes.

Thanks.


-- 
David Marchand


  reply	other threads:[~2021-03-25 14:58 UTC|newest]

Thread overview: 60+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-24  7:07 [dpdk-dev] [PATCH v1 " 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 [this message]
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
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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