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From: Jerin Jacob Kollanukkaran <jerinj@marvell.com>
To: "Gavin.Hu@arm.com" <Gavin.Hu@arm.com>, "dev@dpdk.org" <dev@dpdk.org>
Cc: "david.marchand@redhat.com" <david.marchand@redhat.com>,
	"chaozhu@linux.vnet.ibm.com" <chaozhu@linux.vnet.ibm.com>,
	"nd@arm.com" <nd@arm.com>,
	"bruce.richardson@intel.com" <bruce.richardson@intel.com>,
	"thomas@monjalon.net" <thomas@monjalon.net>,
	"Joyce.Kong@arm.com" <Joyce.Kong@arm.com>,
	"hemant.agrawal@nxp.com" <hemant.agrawal@nxp.com>,
	"stephen@networkplumber.org" <stephen@networkplumber.org>,
	"Honnappa.Nagarahalli@arm.com" <Honnappa.Nagarahalli@arm.com>
Subject: Re: [dpdk-dev] [EXT] [PATCH v3 6/6] spinlock: ticket based to improve fairness
Date: Thu, 27 Dec 2018 12:08:26 +0000	[thread overview]
Message-ID: <235244228ee4d6b30f268fc72837c6b0790d7037.camel@marvell.com> (raw)
In-Reply-To: <VI1PR08MB316738AF12ECD877FCDA7FAC8FB60@VI1PR08MB3167.eurprd08.prod.outlook.com>

On Thu, 2018-12-27 at 10:05 +0000, Gavin Hu (Arm Technology China)
wrote:
> > -----Original Message-----
> > From: Jerin Jacob Kollanukkaran <jerinj@marvell.com>
> > Sent: Thursday, December 27, 2018 2:58 PM
> > To: Gavin Hu (Arm Technology China) <Gavin.Hu@arm.com>; 
> > dev@dpdk.org
> > Cc: david.marchand@redhat.com; chaozhu@linux.vnet.ibm.com; nd
> > <nd@arm.com>; bruce.richardson@intel.com; thomas@monjalon.net;
> > Joyce
> > Kong (Arm Technology China) <Joyce.Kong@arm.com>;
> > hemant.agrawal@nxp.com; stephen@networkplumber.org; Honnappa
> > Nagarahalli <Honnappa.Nagarahalli@arm.com>
> > Subject: Re: [EXT] [PATCH v3 6/6] spinlock: ticket based to improve
> > fairness
> > 
> > On Thu, 2018-12-27 at 12:13 +0800, Gavin Hu wrote:
> > > ---------------------------------------------------------------
> > > ----
> > > ---
> > > From: Joyce Kong <joyce.kong@arm.com>
> > > 
> > > The old implementation is unfair, some threads may take locks
> > > aggressively
> > 
> > I think, one issue here is x86 and ppc follows traditional spinlock
> > and
> > arm64 will be following ticket lock for spinlock implementation.
> > This would change application behaviour on arm64 compared to x86
> > and
> > ppc.
> > 
> > How about having a separate API for ticket lock? That would give,
> > # application choice to use the locking strategy
> > # application behaviour will be same across all arch.
> 
> Ok, will do in v4 to have a new named rte_ticket_spinlock API.

I would prefer rte_ticketlock_[lock/unlock/trylock/is_locked] name
instead of rte_ticket_spinlock_lock etc to reduce the length of the
API.





  reply	other threads:[~2018-12-27 12:08 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-12-27  4:13 [dpdk-dev] [PATCH v3 0/6] spinlock optimization and test case enhancements Gavin Hu
2018-12-27  4:13 ` [dpdk-dev] [PATCH v3 1/6] eal: fix clang compilation error on x86 Gavin Hu
2018-12-27  6:36   ` [dpdk-dev] [EXT] " Jerin Jacob Kollanukkaran
2018-12-27  4:13 ` [dpdk-dev] [PATCH v3 2/6] test/spinlock: remove 1us delay for correct benchmarking Gavin Hu
2018-12-27  7:20   ` [dpdk-dev] [EXT] " Jerin Jacob Kollanukkaran
2018-12-27  4:13 ` [dpdk-dev] [PATCH v3 3/6] test/spinlock: get timestamp more precisely Gavin Hu
2018-12-27  7:27   ` [dpdk-dev] [EXT] " Jerin Jacob Kollanukkaran
2019-01-03 18:22     ` Honnappa Nagarahalli
2018-12-27  4:13 ` [dpdk-dev] [PATCH v3 4/6] test/spinlock: amortize the cost of getting time Gavin Hu
2018-12-27  4:13 ` [dpdk-dev] [PATCH v3 5/6] spinlock: reimplement with atomic one-way barrier builtins Gavin Hu
2018-12-27  7:42   ` [dpdk-dev] [EXT] " Jerin Jacob Kollanukkaran
2018-12-27  9:02     ` Gavin Hu (Arm Technology China)
2019-01-03 20:35       ` Honnappa Nagarahalli
2019-01-11 13:52     ` Gavin Hu (Arm Technology China)
2019-01-14  5:54       ` Honnappa Nagarahalli
2019-01-14  7:39         ` Jerin Jacob Kollanukkaran
2019-01-14 17:08           ` Gavin Hu (Arm Technology China)
2019-01-14  7:57         ` Gavin Hu (Arm Technology China)
2018-12-27  4:13 ` [dpdk-dev] [PATCH v3 6/6] spinlock: ticket based to improve fairness Gavin Hu
2018-12-27  6:58   ` [dpdk-dev] [EXT] " Jerin Jacob Kollanukkaran
2018-12-27 10:05     ` Gavin Hu (Arm Technology China)
2018-12-27 12:08       ` Jerin Jacob Kollanukkaran [this message]
2018-12-27 23:41         ` Stephen Hemminger
2018-12-28  4:39           ` Jerin Jacob Kollanukkaran
2018-12-28 10:04             ` Gavin Hu (Arm Technology China)
2019-01-03 18:35             ` Honnappa Nagarahalli
2019-01-03 19:53               ` Stephen Hemminger
2019-01-04  7:06                 ` Honnappa Nagarahalli

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