From: Stephen Hemminger <stephen@networkplumber.org>
To: "Mattias Rönnblom" <hofors@lysator.liu.se>
Cc: "dev@dpdk.org" <dev@dpdk.org>,
Tyler Retzlaff <roretzla@linux.microsoft.com>
Subject: Re: RTE lock
Date: Tue, 5 Mar 2024 12:50:27 -0800 [thread overview]
Message-ID: <20240305125027.7814d9a8@hermes.local> (raw)
In-Reply-To: <0024db51-8b39-4aa7-969a-bde86fe1c764@lysator.liu.se>
On Tue, 5 Mar 2024 21:18:20 +0100
Mattias Rönnblom <hofors@lysator.liu.se> wrote:
> Shouldn't we have a DPDK-native mutex API, rather than using direct
> POSIX mutex lock calls?
>
> There are two reasons for this, as I see it
> 1) more cleanly support non-POSIX operating system (i.e., Microsoft
> Windows).
> 2) to discourage mechanical use of spinlocks in places where a regular
> mutex lock is more appropriate.
>
> I think (and hope) DPDK developers will tend to pick DPDK-native rather
> than other APIs as their first choice.
>
> For locks, they go for spinlocks, even in control (non-fast
> path/non-packet processing) code paths (e.g., calls made by the typical
> non-EAL thread).
>
> Using spinlocks to synchronize threads that may be preempted aren't
> great idea.
Maybe a wrapper, but actually implementing mutex with flock is complicated.
next prev parent reply other threads:[~2024-03-05 20:50 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-05 20:18 Mattias Rönnblom
2024-03-05 20:50 ` Stephen Hemminger [this message]
2024-03-05 21:02 ` Tyler Retzlaff
2024-03-07 19:50 ` Mattias Rönnblom
2024-03-07 20:27 ` Stephen Hemminger
2024-03-08 9:44 ` Mattias Rönnblom
2024-03-06 8:46 ` Morten Brørup
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