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From: Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>
To: Stephen Hemminger <stephen@networkplumber.org>
Cc: "thomas@monjalon.net" <thomas@monjalon.net>,
	"dev@dpdk.org" <dev@dpdk.org>, nd <nd@arm.com>,
	Diogo Behrens <diogo.behrens@huawei.com>,
	"david.marchand@redhat.com" <david.marchand@redhat.com>,
	Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>,
	nd <nd@arm.com>
Subject: Re: [dpdk-dev] [PATCH] librte_eal: fix mcslock hang on weak memory
Date: Mon, 23 Nov 2020 18:16:44 +0000
Message-ID: <DBAPR08MB581498AE76D1F3FE6E28525498FC0@DBAPR08MB5814.eurprd08.prod.outlook.com> (raw)
In-Reply-To: <20201123074403.054d08aa@hermes.local>

<snip>

> 
> Has anyone investigated later developments in concurrency?
> While researching MCS Lock discovered this quote:
> https://mfukar.github.io/2017/09/26/mcs.html
> 	Luckily, we don’t have to worry about this very much. MCS locks
> 	right now are mostly a teaching tool, and have mostly been superseded
> by:
> 
> 	CLH locks: Craig, Landin, and Hagersten locks replace the explicit
> 		queue for a logical queue
> 	K42 locks: On-stack information is used instead of keeping a thread-
> local
> 		queue node around.
> 	A similar idea is used by the stack-lock algorithm.
I have not looked at these. I have looked briefly at a NUMA aware locks.

> 
> Note: K42 locks are patented by IBM.

  reply	other threads:[~2020-11-23 18:17 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-26  9:20 Diogo Behrens
2020-08-26 10:17 ` Phil Yang
2020-08-27  8:56   ` Diogo Behrens
2020-08-28  9:19     ` Phil Yang
2020-08-31 18:45       ` Honnappa Nagarahalli
2020-10-06 21:49         ` Thomas Monjalon
2020-10-07  9:55           ` Diogo Behrens
2020-10-20 11:56             ` Thomas Monjalon
2020-10-20 21:49               ` Honnappa Nagarahalli
2020-11-22 18:07                 ` Thomas Monjalon
2020-11-23 15:06                   ` Honnappa Nagarahalli
2020-11-23 15:44                     ` Stephen Hemminger
2020-11-23 18:16                       ` Honnappa Nagarahalli [this message]
2020-11-23 18:29 ` Honnappa Nagarahalli
2020-11-23 19:36   ` Stephen Hemminger
2020-11-25  4:50     ` Honnappa Nagarahalli
2020-11-25  8:41       ` Diogo Behrens
2020-11-25 14:16   ` Thomas Monjalon

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