From: Thomas Monjalon <thomas@monjalon.net>
To: Gavin Hu <gavin.hu@arm.com>
Cc: dev@dpdk.org, stephen@networkplumber.org, olivier.matz@6wind.com,
chaozhu@linux.vnet.ibm.com, bruce.richardson@intel.com,
konstantin.ananyev@intel.com, jerin.jacob@caviumnetworks.com,
Honnappa.Nagarahalli@arm.com
Subject: Re: [PATCH v1 0/2] ring C11 library fix and optimization
Date: Tue, 13 Nov 2018 16:57:49 +0100 [thread overview]
Message-ID: <2246047.F6nQ2GSFza@xps> (raw)
In-Reply-To: <1541763767-7399-1-git-send-email-gavin.hu@arm.com>
09/11/2018 12:42, Gavin Hu:
> V1:
> Update the ring C11 library including the following changes:
> 1) On relaxed ordering platforms(like Arm64,PPPC), in ring C11 implementation,
> loading head and tail might be reodered, this makes CAS(compare and retry
> the flow if the head is outdated) not working as expected, the fix is to
> ensure the head is read before the tail, leaving no chances of the combination
> of outdated head and new tail.
> 2) With the above memory fence introduced, some loading can be relaxed.
>
> Gavin Hu (2):
> ring: keep the deterministic order allowing retry to work
> ring: relaxed ordering for load and store the head
No comment, so I guess it can enter in 18.11-rc3.
Applied, thanks
prev parent reply other threads:[~2018-11-13 15:57 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-09 11:42 [PATCH v1 0/2] ring C11 library fix and optimization Gavin Hu
2018-11-09 11:42 ` [PATCH v1 1/2] ring: keep the deterministic order allowing retry to work Gavin Hu
2018-11-09 11:42 ` [PATCH v1 2/2] ring: relaxed ordering for load and store the head Gavin Hu
2018-11-13 15:57 ` Thomas Monjalon [this message]
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