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From: Gavin Hu <gavin.hu@arm.com>
To: dev@dpdk.org
Cc: nd@arm.com, david.marchand@redhat.com,
	konstantin.ananyev@intel.com, thomas@monjalon.net,
	stephen@networkplumber.org, hemant.agrawal@nxp.com,
	jerinj@marvell.com, pbhagavatula@marvell.com,
	Honnappa.Nagarahalli@arm.com, ruifeng.wang@arm.com,
	phil.yang@arm.com, steve.capper@arm.com
Subject: [dpdk-dev] [PATCH v11 3/5] ticketlock: use new API to reduce contention on aarch64
Date: Sun, 27 Oct 2019 20:52:43 +0800	[thread overview]
Message-ID: <1572180765-49767-4-git-send-email-gavin.hu@arm.com> (raw)
In-Reply-To: <1572180765-49767-1-git-send-email-gavin.hu@arm.com>
In-Reply-To: <1561911676-37718-1-git-send-email-gavin.hu@arm.com>

While using ticket lock, cores repeatedly poll the lock variable.
This is replaced by rte_wait_until_equal API.

Running ticketlock_autotest on ThunderX2, Ampere eMAG80, and Arm N1SDP[1],
there were variances between runs, but no notable performance gain or
degradation were seen with and without this patch.

[1] https://community.arm.com/developer/tools-software/oss-platforms/w/\
docs/440/neoverse-n1-sdp

Signed-off-by: Gavin Hu <gavin.hu@arm.com>
Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>
Tested-by: Phil Yang <phil.yang@arm.com>
Tested-by: Pavan Nikhilesh <pbhagavatula@marvell.com>
Reviewed-by: Jerin Jacob <jerinj@marvell.com>
---
 lib/librte_eal/common/include/generic/rte_ticketlock.h | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/lib/librte_eal/common/include/generic/rte_ticketlock.h b/lib/librte_eal/common/include/generic/rte_ticketlock.h
index d9bec87..c295ae7 100644
--- a/lib/librte_eal/common/include/generic/rte_ticketlock.h
+++ b/lib/librte_eal/common/include/generic/rte_ticketlock.h
@@ -66,8 +66,7 @@ static inline void
 rte_ticketlock_lock(rte_ticketlock_t *tl)
 {
 	uint16_t me = __atomic_fetch_add(&tl->s.next, 1, __ATOMIC_RELAXED);
-	while (__atomic_load_n(&tl->s.current, __ATOMIC_ACQUIRE) != me)
-		rte_pause();
+	rte_wait_until_equal_16(&tl->s.current, me, __ATOMIC_ACQUIRE);
 }
 
 /**
-- 
2.7.4


  parent reply	other threads:[~2019-10-27 12:53 UTC|newest]

Thread overview: 168+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-30 16:21 [dpdk-dev] [RFC 0/5] use WFE for locks and ring " 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
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 ` Gavin Hu [this message]
2019-10-27 12:52 ` [dpdk-dev] [PATCH v11 4/5] net/thunderx: use new API to save cycles on aarch64 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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