From: Jerin Jacob Kollanukkaran <jerinj@marvell.com>
To: "gavin.hu@arm.com" <gavin.hu@arm.com>, "dev@dpdk.org" <dev@dpdk.org>
Cc: "stephen@networkplumber.org" <stephen@networkplumber.org>,
"Honnappa.Nagarahalli@arm.com" <Honnappa.Nagarahalli@arm.com>,
"thomas@monjalon.net" <thomas@monjalon.net>,
"nd@arm.com" <nd@arm.com>,
"joyce.kong@arm.com" <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 07:59:42 +0000 [thread overview]
Message-ID: <9c5616fd94e16279dd51aa19e22c2fd14dec7e02.camel@marvell.com> (raw)
In-Reply-To: <20190113144631.23493-1-gavin.hu@arm.com>
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.
> Core [0] count = 534
> Core [1] count = 533
> Core [2] count = 542
> ...
> Core [208] count = 554
> Core [209] count = 556
> Core [210] count = 555
> Core [211] count = 551
>
> Signed-off-by: Joyce Kong <joyce.kong@arm.com>
> Signed-off-by: Gavin Hu <gavin.hu@arm.com>
> ---
>
next prev parent reply other threads:[~2019-01-14 7:59 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 ` Jerin Jacob Kollanukkaran [this message]
2019-01-14 16:57 ` [dpdk-dev] [EXT] " Gavin Hu (Arm Technology China)
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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