From: Stephen Hemminger <stephen@networkplumber.org>
To: "Morten Brørup" <mb@smartsharesystems.com>
Cc: "Honnappa Nagarahalli" <Honnappa.Nagarahalli@arm.com>,
<dev@dpdk.org>, "nd" <nd@arm.com>
Subject: Re: [RFC] rwlock: prevent readers from starving writers
Date: Sat, 9 Jul 2022 09:25:28 -0700 [thread overview]
Message-ID: <20220709092528.68397bf0@hermes.local> (raw)
In-Reply-To: <98CBD80474FA8B44BF855DF32C47DC35D871BB@smartserver.smartshare.dk>
On Sat, 9 Jul 2022 00:04:27 +0200
Morten Brørup <mb@smartsharesystems.com> wrote:
> Always the creative mind, Stephen. :-)
>
> You might consider adding/updating even more comments.
>
> Acked-by: Morten Brørup <mb@smartsharesystems.com>
The motivation is that our work load is reader/writer lock heavy
with small number of threads. Therefore the number of atomic operations
per lock matters, but starving is bad. And any compare-exchange on ARM
is expensive and should be avoided if possible.
The concept here came from this great page.
https://locklessinc.com/articles/locks/
Will add link in next version.
next prev parent reply other threads:[~2022-07-09 16:25 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-07 20:12 Stephen Hemminger
2022-07-08 19:22 ` Honnappa Nagarahalli
2022-07-08 22:04 ` Morten Brørup
2022-07-09 16:22 ` Stephen Hemminger
2022-07-09 16:25 ` Stephen Hemminger [this message]
2022-07-19 20:27 ` [PATCH v2] " Stephen Hemminger
2022-07-19 21:52 ` Morten Brørup
2022-07-19 22:33 ` Stephen Hemminger
2022-07-20 6:48 ` Morten Brørup
2022-10-03 10:01 ` David Marchand
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