From: "Gavin Hu (Arm Technology China)" <Gavin.Hu@arm.com>
To: "jerinj@marvell.com" <jerinj@marvell.com>, "dev@dpdk.org" <dev@dpdk.org>
Cc: "stephen@networkplumber.org" <stephen@networkplumber.org>,
Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>,
"thomas@monjalon.net" <thomas@monjalon.net>, nd <nd@arm.com>,
"Joyce Kong (Arm Technology China)" <Joyce.Kong@arm.com>,
"hemant.agrawal@nxp.com" <hemant.agrawal@nxp.com>
Subject: Re: [dpdk-dev] [EXT] [PATCH v1] ticketlock: ticket based to improve fairness
Date: Mon, 14 Jan 2019 16:57:30 +0000 [thread overview]
Message-ID: <VI1PR08MB31676B22F34777739FA2845C8F800@VI1PR08MB3167.eurprd08.prod.outlook.com> (raw)
In-Reply-To: <9c5616fd94e16279dd51aa19e22c2fd14dec7e02.camel@marvell.com>
> -----Original Message-----
> From: Jerin Jacob Kollanukkaran <jerinj@marvell.com>
> Sent: Monday, January 14, 2019 4:00 PM
> To: Gavin Hu (Arm Technology China) <Gavin.Hu@arm.com>;
> dev@dpdk.org
> Cc: stephen@networkplumber.org; Honnappa Nagarahalli
> <Honnappa.Nagarahalli@arm.com>; thomas@monjalon.net; nd
> <nd@arm.com>; Joyce Kong (Arm Technology China)
> <Joyce.Kong@arm.com>; hemant.agrawal@nxp.com
> Subject: Re: [EXT] [PATCH v1] ticketlock: ticket based to improve fairness
>
> On Sun, 2019-01-13 at 22:46 +0800, Gavin Hu wrote:
> > -------------------------------------------------------------------
> > ---
> > From: Joyce Kong <joyce.kong@arm.com>
> >
> > The spinlock implementation is unfair, some threads may take locks
> > aggressively while leaving the other threads starving for long time.
> > As
> > shown in the following test, within same period of time, there are
> > threads taking locks much more times than the others.
> >
> > The ticketlock gives each waiting thread a ticket and they can take
> > the
> > lock one by one, first come, first serviced, this avoids starvation
> > for
> > too long time and is more predictable.
> >
> > *** spinlock_autotest without this patch ***
> > Core [0] count = 89
> > Core [1] count = 84
> > Core [2] count = 94
> > ...
> > Core [208] count = 171
> > Core [209] count = 152
> > Core [210] count = 161
> > Core [211] count = 187
> >
> > *** spinlock_autotest with this patch ***
>
> This comment needs to be updated as it is new API now
> and we need add test case for the same. I think,
> making modification to exiting spinlock test case would be fine.
Thanks for you comments, we will do it and send a v2.
next prev parent reply other threads:[~2019-01-14 16:57 UTC|newest]
Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-13 14:46 [dpdk-dev] " Gavin Hu
2019-01-14 7:59 ` [dpdk-dev] [EXT] " Jerin Jacob Kollanukkaran
2019-01-14 16:57 ` Gavin Hu (Arm Technology China) [this message]
2019-01-14 23:36 ` [dpdk-dev] " Honnappa Nagarahalli
2019-01-18 9:15 ` [dpdk-dev] [PATCH v2 1/2] " Joyce Kong
2019-01-25 8:37 ` [dpdk-dev] [PATCH v3 0/2] ticketlock: implement ticketlock and add test case Joyce Kong
2019-02-19 10:48 ` [dpdk-dev] [PATCH v4 " Joyce Kong
2019-03-11 5:52 ` [dpdk-dev] [PATCH v5 " Joyce Kong
2019-02-19 10:48 ` [dpdk-dev] [PATCH v4 1/2] ticketlock: ticket based to improve fairness Joyce Kong
2019-03-11 5:52 ` [dpdk-dev] [PATCH v5 1/2] eal/ticketlock: " Joyce Kong
2019-03-13 9:41 ` Jerin Jacob Kollanukkaran
2019-03-15 6:57 ` Joyce Kong (Arm Technology China)
2019-03-15 6:57 ` Joyce Kong (Arm Technology China)
2019-03-13 15:36 ` Jerin Jacob Kollanukkaran
2019-03-15 6:58 ` Joyce Kong (Arm Technology China)
2019-03-15 6:58 ` Joyce Kong (Arm Technology China)
2019-02-19 10:48 ` [dpdk-dev] [PATCH v4 2/2] test/ticketlock: add ticket lock test case Joyce Kong
2019-03-11 5:52 ` [dpdk-dev] [PATCH v5 " Joyce Kong
2019-03-13 13:31 ` Jerin Jacob Kollanukkaran
2019-03-15 6:57 ` Joyce Kong (Arm Technology China)
2019-03-15 6:57 ` Joyce Kong (Arm Technology China)
2019-01-25 8:37 ` [dpdk-dev] [PATCH v3 1/2] ticketlock: ticket based to improve fairness Joyce Kong
2019-01-25 8:37 ` [dpdk-dev] [PATCH v3 2/2] test/ticketlock: add ticket lock test case Joyce Kong
2019-03-15 6:56 ` [dpdk-dev] [PATCH v6 0/2] ticketlock: implement ticketlock and add " Joyce Kong
2019-03-15 6:56 ` Joyce Kong
2019-03-15 6:56 ` [dpdk-dev] [PATCH v6 1/2] eal/ticketlock: ticket based to improve fairness Joyce Kong
2019-03-15 6:56 ` Joyce Kong
2019-03-15 12:55 ` Ananyev, Konstantin
2019-03-15 12:55 ` Ananyev, Konstantin
2019-03-19 9:44 ` Gavin Hu (Arm Technology China)
2019-03-19 9:44 ` Gavin Hu (Arm Technology China)
2019-03-19 10:15 ` Ananyev, Konstantin
2019-03-19 10:15 ` Ananyev, Konstantin
2019-03-20 5:11 ` Gavin Hu (Arm Technology China)
2019-03-20 5:11 ` Gavin Hu (Arm Technology China)
2019-03-20 9:47 ` Ananyev, Konstantin
2019-03-20 9:47 ` Ananyev, Konstantin
2019-03-22 2:04 ` Gavin Hu (Arm Technology China)
2019-03-22 2:04 ` Gavin Hu (Arm Technology China)
2019-03-15 6:56 ` [dpdk-dev] [PATCH v6 2/2] test/ticketlock: add ticket lock test case Joyce Kong
2019-03-15 6:56 ` Joyce Kong
2019-03-21 9:13 ` [dpdk-dev] [PATCH v7 0/3] ticketlock: implement ticketlock and add " Joyce Kong
2019-03-21 9:13 ` Joyce Kong
2019-03-21 9:13 ` [dpdk-dev] [PATCH v7 2/3] eal/ticketlock: enable generic ticketlock on all arch Joyce Kong
2019-03-21 9:13 ` Joyce Kong
2019-03-21 9:13 ` [dpdk-dev] [PATCH v7 3/3] test/ticketlock: add ticket lock test case Joyce Kong
2019-03-21 9:13 ` Joyce Kong
2019-03-22 11:38 ` Ananyev, Konstantin
2019-03-22 11:38 ` Ananyev, Konstantin
2019-03-25 10:25 ` Joyce Kong (Arm Technology China)
2019-03-25 10:25 ` Joyce Kong (Arm Technology China)
2019-03-21 9:15 ` [dpdk-dev] [PATCH v7 1/3] eal/ticketlock: ticket based to improve fairness Joyce Kong
2019-03-21 9:15 ` Joyce Kong
2019-03-22 10:56 ` Ananyev, Konstantin
2019-03-22 10:56 ` Ananyev, Konstantin
2019-03-25 11:11 ` [dpdk-dev] [PATCH v8 0/3] ticketlock: implement ticketlock and add test case Joyce Kong
2019-03-25 11:11 ` Joyce Kong
2019-03-27 11:20 ` Ananyev, Konstantin
2019-03-27 11:20 ` Ananyev, Konstantin
2019-03-28 14:02 ` Thomas Monjalon
2019-03-28 14:02 ` Thomas Monjalon
2019-03-25 11:11 ` [dpdk-dev] [PATCH v8 1/3] eal/ticketlock: ticket based to improve fairness Joyce Kong
2019-03-25 11:11 ` Joyce Kong
2019-03-25 11:11 ` [dpdk-dev] [PATCH v8 2/3] eal/ticketlock: enable generic ticketlock on all arch Joyce Kong
2019-03-25 11:11 ` Joyce Kong
2019-03-25 11:11 ` [dpdk-dev] [PATCH v8 3/3] test/ticketlock: add ticket lock test case Joyce Kong
2019-03-25 11:11 ` Joyce Kong
2019-04-08 20:18 ` David Marchand
2019-04-08 20:18 ` David Marchand
2019-04-14 20:37 ` Thomas Monjalon
2019-04-14 20:37 ` Thomas Monjalon
2019-04-15 9:07 ` Joyce Kong (Arm Technology China)
2019-04-15 9:07 ` Joyce Kong (Arm Technology China)
2019-01-18 9:15 ` [dpdk-dev] [PATCH v2 2/2] " Joyce Kong
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