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From: Phil Yang <Phil.Yang@arm.com>
To: Phil Yang <Phil.Yang@arm.com>,
	"rsanford@akamai.com" <rsanford@akamai.com>,
	"erik.g.carrillo@intel.com" <erik.g.carrillo@intel.com>,
	"dev@dpdk.org" <dev@dpdk.org>
Cc: "david.marchand@redhat.com" <david.marchand@redhat.com>,
	"anatoly.burakov@intel.com" <anatoly.burakov@intel.com>,
	"thomas@monjalon.net" <thomas@monjalon.net>,
	"jerinj@marvell.com" <jerinj@marvell.com>,
	"hemant.agrawal@nxp.com" <hemant.agrawal@nxp.com>,
	Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>,
	Gavin Hu <Gavin.Hu@arm.com>, nd <nd@arm.com>, nd <nd@arm.com>
Subject: Re: [dpdk-dev] [PATCH 2/2] lib/timer: relax barrier for status update
Date: Wed, 8 Apr 2020 10:23:53 +0000
Message-ID: <VE1PR08MB4640801CACC6CBFC448826CFE9C00@VE1PR08MB4640.eurprd08.prod.outlook.com> (raw)
In-Reply-To: <1582526539-14360-2-git-send-email-phil.yang@arm.com>

> -----Original Message-----
> From: Phil Yang <phil.yang@arm.com>
> Sent: Monday, February 24, 2020 2:42 PM
> To: rsanford@akamai.com; erik.g.carrillo@intel.com; dev@dpdk.org
> Cc: david.marchand@redhat.com; anatoly.burakov@intel.com;
> thomas@monjalon.net; jerinj@marvell.com; hemant.agrawal@nxp.com;
> Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>; Gavin Hu
> <Gavin.Hu@arm.com>; Phil Yang <Phil.Yang@arm.com>; nd <nd@arm.com>
> Subject: [PATCH 2/2] lib/timer: relax barrier for status update
> 
> Volatile has no ordering semantics. The rte_timer structure defines
> timer status as a volatile variable and uses the rte_r/wmb barrier
> to guarantee inter-thread visibility.
> 
> This patch optimized the volatile operation with c11 atomic operations
> and one-way barrier to save the performance penalty. According to the
> timer_perf_autotest benchmarking results, this patch can uplift 10%~16%
> timer appending performance, 3%~20% timer resetting performance and 45%
> timer callbacks scheduling performance on aarch64 and no loss in
> performance for x86.
> 
> Suggested-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>
> Signed-off-by: Phil Yang <phil.yang@arm.com>
> Reviewed-by: Gavin Hu <gavin.hu@arm.com>
> ---
>  lib/librte_timer/rte_timer.c | 90 +++++++++++++++++++++++++++++++----

Ping. 

Thanks,
Phil

  reply	other threads:[~2020-04-08 10:24 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-24  6:42 [dpdk-dev] [PATCH 1/2] lib/timer: protect timer subsystem initialized with lock Phil Yang
2020-02-24  6:42 ` [dpdk-dev] [PATCH 2/2] lib/timer: relax barrier for status update Phil Yang
2020-04-08 10:23   ` Phil Yang [this message]
2020-04-08 21:10   ` Carrillo, Erik G
2020-04-08 21:16     ` Honnappa Nagarahalli
2020-04-08 21:26       ` Carrillo, Erik G
2020-04-08 21:56         ` Honnappa Nagarahalli
2020-04-09 19:29           ` Carrillo, Erik G
2020-04-10  4:39             ` Phil Yang
2020-04-20 16:05   ` [dpdk-dev] [PATCH v2] " Phil Yang
2020-04-23 20:06     ` Honnappa Nagarahalli
2020-04-24  1:26       ` Carrillo, Erik G
2020-04-24  7:27         ` Phil Yang
2020-04-24  7:24     ` [dpdk-dev] [PATCH v3] " Phil Yang
2020-04-25 17:17       ` Thomas Monjalon
2020-04-26  7:36         ` Phil Yang
2020-04-26 12:18           ` Carrillo, Erik G
2020-04-26 14:20             ` Phil Yang
2020-04-26 19:30               ` Carrillo, Erik G
2020-04-26 14:45       ` [dpdk-dev] [PATCH v4] " Phil Yang
2020-04-26 20:06         ` Thomas Monjalon
2020-04-25 14:36     ` [dpdk-dev] [PATCH v2] " Thomas Monjalon
2020-04-25 15:51       ` Phil Yang
2020-04-25 16:07         ` Thomas Monjalon
2020-02-25 22:26 ` [dpdk-dev] [PATCH 1/2] lib/timer: protect timer subsystem initialized with lock Carrillo, Erik G
2020-04-25 17:21   ` [dpdk-dev] [dpdk-stable] " Thomas Monjalon

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