DPDK patches and discussions
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From: Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>
To: "Gavin Hu (Arm Technology China)" <Gavin.Hu@arm.com>,
	"dev@dpdk.org" <dev@dpdk.org>
Cc: nd <nd@arm.com>, "thomas@monjalon.net" <thomas@monjalon.net>,
	"stephen@networkplumber.org" <stephen@networkplumber.org>,
	"jerinj@marvell.com" <jerinj@marvell.com>,
	"pbhagavatula@marvell.com" <pbhagavatula@marvell.com>,
	"Gavin Hu (Arm Technology China)" <Gavin.Hu@arm.com>,
	Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>,
	nd <nd@arm.com>
Subject: Re: [dpdk-dev] [PATCH v3 0/5] use WFE for locks and ring on aarch64
Date: Tue, 23 Jul 2019 19:15:40 +0000	[thread overview]
Message-ID: <VE1PR08MB514993F8EA6A7C19187D873B98C70@VE1PR08MB5149.eurprd08.prod.outlook.com> (raw)
In-Reply-To: <1563896626-44862-1-git-send-email-gavin.hu@arm.com>

Hi Gavin,
	I think this should have been V1 (I mean, no versioning, just 'PATCH'), since it is converted to patch. I think we should be able to resend it as V1 and mark this V3 as 'superseded'.

Hi Thomas,
	Please let us know if it is worth/helps fixing the version.

Thanks,
Honnappa

> -----Original Message-----
> From: Gavin Hu <gavin.hu@arm.com>
> Sent: Tuesday, July 23, 2019 10:44 AM
> To: dev@dpdk.org
> Cc: nd <nd@arm.com>; thomas@monjalon.net;
> stephen@networkplumber.org; jerinj@marvell.com;
> pbhagavatula@marvell.com; Honnappa Nagarahalli
> <Honnappa.Nagarahalli@arm.com>; Gavin Hu (Arm Technology China)
> <Gavin.Hu@arm.com>
> Subject: [PATCH v3 0/5] use WFE for locks and ring on aarch64
> 
> DPDK has multiple use cases where the core repeatedly polls a location in
> memory. This polling results in many cache and memory transactions.
> 
> Arm architecture provides WFE (Wait For Event) instruction, which allows the
> cpu core to enter a low power state until woken up by the update to the
> memory location being polled. Thus reducing the cache and memory
> transactions.
> 
> x86 has the PAUSE hint instruction to reduce such overhead.
> 
> The rte_wait_until_equal_xxx APIs abstract the functionality of 'polling for a
> memory location to become equal to a given value'.
> 
> For non-Arm platforms, these APIs are just wrappers around do-while loop
> with rte_pause, so there are no performance differences.
> 
> For Arm platforms, use of WFE can be configured using
> CONFIG_RTE_USE_WFE option. It is disabled by default.
> 
> Currently, use of WFE is supported only for aarch64 platforms. armv7
> platforms do support the WFE instruction, but they require explicit wake up
> events(sev) and are less performannt.
> 
> Testing shows that, performance varies across different platforms, with some
> showing degradation.
> 
> CONFIG_RTE_USE_WFE should be enabled depending on the performance on
> the target platforms.
> 
> V3:
> * Convert RFCs to patches
> V2:
> * Use inline functions instead of marcos
> * Add load and compare in the beginning of the APIs
> * Fix some style errors in asm inline
> V1:
> * Add the new APIs and use it for ring and locks
> 
> Gavin Hu (5):
>   eal: add the APIs to wait until equal
>   ticketlock: use new API to reduce contention on aarch64
>   ring: use wfe to wait for ring tail update on aarch64
>   spinlock: use wfe to reduce contention on aarch64
>   config: add WFE config entry for aarch64
> 
>  config/arm/meson.build                             |   1 +
>  config/common_armv8a_linux                         |   6 ++
>  .../common/include/arch/arm/rte_atomic_64.h        |   4 +
>  .../common/include/arch/arm/rte_pause_64.h         | 106
> +++++++++++++++++++++
>  .../common/include/arch/arm/rte_spinlock.h         |  25 +++++
>  lib/librte_eal/common/include/generic/rte_pause.h  |  39 +++++++-
>  .../common/include/generic/rte_spinlock.h          |   2 +-
>  .../common/include/generic/rte_ticketlock.h        |   3 +-
>  lib/librte_ring/rte_ring_c11_mem.h                 |   4 +-
>  lib/librte_ring/rte_ring_generic.h                 |   3 +-
>  10 files changed, 185 insertions(+), 8 deletions(-)
> 
> --
> 2.7.4


  reply	other threads:[~2019-07-23 19:15 UTC|newest]

Thread overview: 168+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-30 16:21 [dpdk-dev] [RFC " Gavin Hu
2019-06-30 16:21 ` [dpdk-dev] [RFC 1/5] eal: add the APIs to wait until equal Gavin Hu
2019-06-30 20:27   ` Stephen Hemminger
2019-07-01  7:16     ` Gavin Hu (Arm Technology China)
2019-07-01  7:43       ` Thomas Monjalon
2019-07-02 14:07         ` Gavin Hu (Arm Technology China)
2019-07-01  9:58   ` Pavan Nikhilesh Bhagavatula
2019-07-02 14:08     ` Gavin Hu (Arm Technology China)
2019-06-30 16:21 ` [dpdk-dev] [RFC 2/5] ticketlock: use new API to reduce contention on aarch64 Gavin Hu
2019-06-30 16:21 ` [dpdk-dev] [RFC 3/5] ring: use wfe to wait for ring tail update " Gavin Hu
2019-06-30 16:21 ` [dpdk-dev] [RFC 4/5] spinlock: use wfe to reduce contention " Gavin Hu
2019-06-30 16:21 ` [dpdk-dev] [RFC 5/5] config: add WFE config entry for aarch64 Gavin Hu
2019-06-30 20:29 ` [dpdk-dev] [RFC 0/5] use WFE for locks and ring on aarch64 Stephen Hemminger
2019-07-01  9:12   ` Gavin Hu (Arm Technology China)
2019-07-03  8:58 ` [dpdk-dev] [RFC v2 " Gavin Hu
2019-07-03  8:58 ` [dpdk-dev] [RFC v2 1/5] eal: add the APIs to wait until equal Gavin Hu
2019-07-20  6:46   ` [dpdk-dev] [EXT] " Pavan Nikhilesh Bhagavatula
2019-07-03  8:58 ` [dpdk-dev] [RFC v2 2/5] ticketlock: use new API to reduce contention on aarch64 Gavin Hu
2019-07-20  6:57   ` Pavan Nikhilesh Bhagavatula
2019-07-03  8:58 ` [dpdk-dev] [RFC v2 3/5] ring: use wfe to wait for ring tail update " Gavin Hu
2019-07-03  8:58 ` [dpdk-dev] [RFC v2 4/5] spinlock: use wfe to reduce contention " Gavin Hu
2019-07-20  6:59   ` Pavan Nikhilesh Bhagavatula
2019-07-03  8:58 ` [dpdk-dev] [RFC v2 5/5] config: add WFE config entry for aarch64 Gavin Hu
2019-07-20  7:03   ` Pavan Nikhilesh Bhagavatula
2019-07-23 15:47     ` Gavin Hu (Arm Technology China)
2019-07-23 15:43 ` [dpdk-dev] [PATCH v3 0/5] use WFE for locks and ring on aarch64 Gavin Hu
2019-07-23 19:15   ` Honnappa Nagarahalli [this message]
2019-07-23 21:27     ` Thomas Monjalon
2019-07-24  2:44       ` Honnappa Nagarahalli
2019-07-24  7:43         ` Thomas Monjalon
2019-07-23 15:43 ` [dpdk-dev] [PATCH v3 1/5] eal: add the APIs to wait until equal Gavin Hu
2019-07-24 11:52   ` [dpdk-dev] [EXT] " Jerin Jacob Kollanukkaran
2019-07-24 18:10     ` Gavin Hu (Arm Technology China)
2019-07-23 15:43 ` [dpdk-dev] [PATCH v3 2/5] ticketlock: use new API to reduce contention on aarch64 Gavin Hu
2019-07-23 15:43 ` [dpdk-dev] [PATCH v3 3/5] ring: use wfe to wait for ring tail update " Gavin Hu
2019-07-23 15:43 ` [dpdk-dev] [PATCH v3 4/5] spinlock: use wfe to reduce contention " Gavin Hu
2019-07-24 12:17   ` [dpdk-dev] [EXT] " Jerin Jacob Kollanukkaran
2019-07-23 15:43 ` [dpdk-dev] [PATCH v3 5/5] config: add WFE config entry for aarch64 Gavin Hu
2019-07-23 18:05   ` Stephen Hemminger
2019-07-23 19:10     ` Honnappa Nagarahalli
2019-07-24 17:59       ` Gavin Hu (Arm Technology China)
2019-07-24 12:25   ` [dpdk-dev] [EXT] " Jerin Jacob Kollanukkaran
2019-08-22  6:12 ` [dpdk-dev] [PATCH v4 0/6] use WFE for locks and ring on aarch64 Gavin Hu
2019-10-16  8:08   ` David Marchand
2019-10-24 20:26     ` David Christensen
2019-08-22  6:12 ` [dpdk-dev] [PATCH v4 1/6] bus/fslmc: fix the conflicting dmb function Gavin Hu
2019-08-22  6:12 ` [dpdk-dev] [PATCH v4 2/6] eal: add the APIs to wait until equal Gavin Hu
2019-09-11 12:26   ` Jerin Jacob
2019-09-12  8:25     ` Gavin Hu (Arm Technology China)
2019-08-22  6:12 ` [dpdk-dev] [PATCH v4 3/6] ticketlock: use new API to reduce contention on aarch64 Gavin Hu
2019-08-22  6:12 ` [dpdk-dev] [PATCH v4 4/6] ring: use wfe to wait for ring tail update " Gavin Hu
2019-08-22  6:12 ` [dpdk-dev] [PATCH v4 5/6] spinlock: use wfe to reduce contention " Gavin Hu
     [not found]   ` <CY4PR1801MB1863AF9695BB10930E817D78DEB00@CY4PR1801MB1863.namprd18.prod.outlook.com>
     [not found]     ` <VI1PR08MB5376BEBCC1FD1E03F0B8A8848FB00@VI1PR08MB5376.eurprd08.prod.outlook.com>
2019-09-14 15:21       ` [dpdk-dev] [EXT] " Gavin Hu (Arm Technology China)
2019-08-22  6:12 ` [dpdk-dev] [PATCH v4 6/6] config: add WFE config entry for aarch64 Gavin Hu
2019-09-12 11:24 ` [dpdk-dev] [PATCH v5 0/8] use WFE " Gavin Hu
2019-09-12 11:24 ` [dpdk-dev] [PATCH v5 1/8] config: add WFE config entry " Gavin Hu
2019-09-12 15:48   ` Jerin Jacob
2019-09-13 16:01     ` Gavin Hu (Arm Technology China)
2019-09-12 11:24 ` [dpdk-dev] [PATCH v5 2/8] bus/fslmc: fix the conflicting dmb function Gavin Hu
2019-09-12 11:24 ` [dpdk-dev] [PATCH v5 3/8] eal: add the APIs to wait until equal Gavin Hu
2019-09-12 16:11   ` Jerin Jacob
2019-09-13 17:05     ` Gavin Hu (Arm Technology China)
2019-09-12 11:24 ` [dpdk-dev] [PATCH v5 4/8] spinlock: use wfe to reduce contention on aarch64 Gavin Hu
2019-09-12 11:24 ` [dpdk-dev] [PATCH v5 5/8] ticketlock: use new API " Gavin Hu
2019-09-12 16:14   ` Jerin Jacob
2019-09-12 11:24 ` [dpdk-dev] [PATCH v5 6/8] ring: use wfe to wait for ring tail update " Gavin Hu
2019-09-12 11:24 ` [dpdk-dev] [PATCH v5 7/8] net/thunderx: use new API to save cycles " Gavin Hu
2019-09-12 16:15   ` Jerin Jacob
2019-09-12 11:24 ` [dpdk-dev] [PATCH v5 8/8] event/opdl: " Gavin Hu
2019-09-12 16:16   ` Jerin Jacob
2019-09-14 14:59 ` [dpdk-dev] [PATCH v6 0/7] use WFE for aarch64 Gavin Hu
2019-09-26 13:41   ` Jerin Jacob
2019-09-27  5:45     ` Gavin Hu (Arm Technology China)
2019-09-14 14:59 ` [dpdk-dev] [PATCH v6 1/7] bus/fslmc: fix the conflicting dmb function Gavin Hu
2019-09-14 14:59 ` [dpdk-dev] [PATCH v6 2/7] eal: add the APIs to wait until equal Gavin Hu
2019-09-14 14:59 ` [dpdk-dev] [PATCH v6 3/7] spinlock: use wfe to reduce contention on aarch64 Gavin Hu
2019-09-14 14:59 ` [dpdk-dev] [PATCH v6 4/7] ticketlock: use new API " Gavin Hu
2019-09-14 14:59 ` [dpdk-dev] [PATCH v6 5/7] ring: use wfe to wait for ring tail update " Gavin Hu
2019-09-14 14:59 ` [dpdk-dev] [PATCH v6 6/7] net/thunderx: use new API to save cycles " Gavin Hu
2019-09-14 14:59 ` [dpdk-dev] [PATCH v6 7/7] event/opdl: " Gavin Hu
2019-09-27  5:41 ` [dpdk-dev] [PATCH v7 0/7] use WFE for aarch64 Gavin Hu
2019-10-17 18:37   ` David Marchand
2019-09-27  5:41 ` [dpdk-dev] [PATCH v7 1/7] bus/fslmc: fix the conflicting dmb function Gavin Hu
2019-09-27  8:24   ` Hemant Agrawal
2019-10-17 15:06   ` David Marchand
2019-09-27  5:41 ` [dpdk-dev] [PATCH v7 2/7] eal: add the APIs to wait until equal Gavin Hu
2019-09-27 11:03   ` Jerin Jacob
2019-10-17 13:14   ` Ananyev, Konstantin
2019-10-21  7:21     ` Gavin Hu (Arm Technology China)
2019-10-17 15:45   ` David Marchand
2019-10-21  7:38     ` Gavin Hu (Arm Technology China)
2019-10-21 19:17       ` David Marchand
2019-10-17 16:44   ` Ananyev, Konstantin
2019-10-23 16:20     ` Gavin Hu (Arm Technology China)
2019-10-23 16:29       ` Gavin Hu (Arm Technology China)
2019-10-24 10:21         ` Ananyev, Konstantin
2019-10-24 10:52           ` Gavin Hu (Arm Technology China)
2019-09-27  5:41 ` [dpdk-dev] [PATCH v7 3/7] spinlock: use wfe to reduce contention on aarch64 Gavin Hu
2019-10-17 18:27   ` David Marchand
2019-10-18  5:45     ` Gavin Hu (Arm Technology China)
2019-10-21  7:27     ` Gavin Hu (Arm Technology China)
2019-09-27  5:41 ` [dpdk-dev] [PATCH v7 4/7] ticketlock: use new API " Gavin Hu
2019-09-27  5:41 ` [dpdk-dev] [PATCH v7 5/7] ring: use wfe to wait for ring tail update " Gavin Hu
2019-09-27  5:41 ` [dpdk-dev] [PATCH v7 6/7] net/thunderx: use new API to save cycles " Gavin Hu
2019-09-27  5:41 ` [dpdk-dev] [PATCH v7 7/7] event/opdl: " Gavin Hu
2019-10-21  9:47 ` [dpdk-dev] [PATCH v8 0/6] use WFE for aarch64 Gavin Hu
2019-10-21  9:47 ` [dpdk-dev] [PATCH v8 1/6] bus/fslmc: fix the conflicting dmb function Gavin Hu
2019-10-21 19:00   ` David Marchand
2019-10-21  9:47 ` [dpdk-dev] [PATCH v8 2/6] eal: add the APIs to wait until equal Gavin Hu
2019-10-21 19:19   ` David Marchand
2019-10-22  9:36     ` Ananyev, Konstantin
2019-10-22 10:17       ` David Marchand
2019-10-22 16:05         ` Gavin Hu (Arm Technology China)
2019-10-22 16:03       ` Gavin Hu (Arm Technology China)
2019-10-21  9:47 ` [dpdk-dev] [PATCH v8 3/6] spinlock: use wfe to reduce contention on aarch64 Gavin Hu
2019-10-21  9:47 ` [dpdk-dev] [PATCH v8 4/6] ticketlock: use new API " Gavin Hu
2019-10-21  9:47 ` [dpdk-dev] [PATCH v8 5/6] net/thunderx: use new API to save cycles " Gavin Hu
2019-10-21  9:47 ` [dpdk-dev] [PATCH v8 6/6] event/opdl: " Gavin Hu
2019-10-24 10:42 ` [dpdk-dev] [PATCH v9 0/5] use WFE for aarch64 Gavin Hu
2019-10-24 10:42 ` [dpdk-dev] [PATCH v9 1/5] bus/fslmc: fix the conflicting dmb function Gavin Hu
2019-10-24 10:42 ` [dpdk-dev] [PATCH v9 2/5] eal: add the APIs to wait until equal Gavin Hu
2019-10-24 13:52   ` Ananyev, Konstantin
2019-10-24 13:57     ` Ananyev, Konstantin
2019-10-24 17:00     ` Gavin Hu (Arm Technology China)
2019-10-24 10:42 ` [dpdk-dev] [PATCH v9 3/5] ticketlock: use new API to reduce contention on aarch64 Gavin Hu
2019-10-24 10:42 ` [dpdk-dev] [PATCH v9 4/5] net/thunderx: use new API to save cycles " Gavin Hu
2019-10-24 10:42 ` [dpdk-dev] [PATCH v9 5/5] event/opdl: " Gavin Hu
2019-10-25 15:39 ` [dpdk-dev] [PATCH v10 0/5] use WFE for aarch64 Gavin Hu
2019-10-25 15:39 ` [dpdk-dev] [PATCH v10 1/5] bus/fslmc: fix the conflicting dmb function Gavin Hu
2019-10-25 15:39 ` [dpdk-dev] [PATCH v10 2/5] eal: add the APIs to wait until equal Gavin Hu
2019-10-25 17:27   ` Ananyev, Konstantin
2019-10-27 13:03     ` Gavin Hu (Arm Technology China)
2019-10-25 15:39 ` [dpdk-dev] [PATCH v10 3/5] ticketlock: use new API to reduce contention on aarch64 Gavin Hu
2019-10-25 15:39 ` [dpdk-dev] [PATCH v10 4/5] net/thunderx: use new API to save cycles " Gavin Hu
2019-10-25 15:39 ` [dpdk-dev] [PATCH v10 5/5] event/opdl: " Gavin Hu
2019-10-27 12:52 ` [dpdk-dev] [PATCH v11 0/5] use WFE for aarch64 Gavin Hu
2019-10-27 12:52 ` [dpdk-dev] [PATCH v11 1/5] bus/fslmc: fix the conflicting dmb function Gavin Hu
2019-10-27 12:52 ` [dpdk-dev] [PATCH v11 2/5] eal: add the APIs to wait until equal Gavin Hu
2019-10-27 20:49   ` David Marchand
2019-10-28  5:08     ` Gavin Hu (Arm Technology China)
2019-10-27 22:19   ` Ananyev, Konstantin
2019-10-28  5:04     ` Gavin Hu (Arm Technology China)
2019-10-27 12:52 ` [dpdk-dev] [PATCH v11 3/5] ticketlock: use new API to reduce contention on aarch64 Gavin Hu
2019-10-27 12:52 ` [dpdk-dev] [PATCH v11 4/5] net/thunderx: use new API to save cycles " Gavin Hu
2019-10-27 12:52 ` [dpdk-dev] [PATCH v11 5/5] event/opdl: " Gavin Hu
2019-11-04 15:32 ` [dpdk-dev] [PATCH v12 0/5] use WFE for aarch64 Gavin Hu
2019-11-04 15:32 ` [dpdk-dev] [PATCH v12 1/5] bus/fslmc: fix the conflicting dmb function Gavin Hu
2019-11-04 15:32 ` [dpdk-dev] [PATCH v12 2/5] eal: add the APIs to wait until equal Gavin Hu
2019-11-07 15:03   ` Ananyev, Konstantin
2019-11-04 15:32 ` [dpdk-dev] [PATCH v12 3/5] ticketlock: use new API to reduce contention on aarch64 Gavin Hu
2019-11-04 15:32 ` [dpdk-dev] [PATCH v12 4/5] net/thunderx: use new API to save cycles " Gavin Hu
2019-11-04 15:32 ` [dpdk-dev] [PATCH v12 5/5] event/opdl: " Gavin Hu
2019-11-07 21:35 ` [dpdk-dev] [PATCH v13 0/5] use WFE for aarch64 David Marchand
2019-11-07 21:35   ` [dpdk-dev] [PATCH v13 1/5] bus/fslmc: fix the conflicting dmb function David Marchand
2019-12-10  6:13     ` Honnappa Nagarahalli
2019-11-07 21:35   ` [dpdk-dev] [PATCH v13 2/5] eal: add the APIs to wait until equal David Marchand
2019-11-08 16:38     ` Ananyev, Konstantin
2019-11-08 17:00       ` Thomas Monjalon
2019-11-08 18:36         ` Ananyev, Konstantin
2019-11-11  5:11           ` Jerin Jacob
2019-11-11  5:51             ` Gavin Hu (Arm Technology China)
2019-12-10  7:51               ` Honnappa Nagarahalli
2020-01-16 21:38                 ` David Marchand
2020-01-17  2:46                   ` Gavin Hu
2019-11-07 21:35   ` [dpdk-dev] [PATCH v13 3/5] ticketlock: use new API to reduce contention on aarch64 David Marchand
2019-11-07 21:35   ` [dpdk-dev] [PATCH v13 4/5] net/thunderx: use new API to save cycles " David Marchand
2019-11-07 21:35   ` [dpdk-dev] [PATCH v13 5/5] event/opdl: " David Marchand
2020-01-17 11:15   ` [dpdk-dev] [PATCH v13 0/5] use WFE for aarch64 David Marchand

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