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From: Michael Jeanson <>
Subject: Re: [PATCH v7 0/8] Extend rseq support
Date: Fri, 2 Feb 2024 10:40:56 -0500	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

On 2024-02-01 14:36, Michael Jeanson wrote:
> This series rebases the standalone "Add rseq extensible ABI" patch on
> current master and adds an accelerated getcpu() implementation using the
> rseq extensible ABI with initial support for aarch64 and x86_64.
> On an aarch64 system (Snapdragon 8cx Gen 3) which lacks a vDSO for
> getcpu() we measured an improvement from 130 ns to 1 ns while on x86_64
> (i7-8550U) which has a vDSO we measured a more modest improvement from
> 10 ns to 2 ns.
> Tested on i386, aarch64 and x86_64.

The failures reported by the Linaro-TCWG-CI on arm seem to be only an issue of 
symbol sorting in the abilist files. Is there tooling to regenerate those for 
all architectures?



  parent reply	other threads:[~2024-02-02 15:41 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-02-01 19:36 Michael Jeanson
2024-02-01 19:36 ` [PATCH v7 1/8] nptl: fix potential merge of __rseq_* relro symbols Michael Jeanson
2024-02-01 19:36 ` [PATCH v7 2/8] Add rseq extensible ABI support Michael Jeanson
2024-02-01 19:36 ` [PATCH v7 3/8] nptl: Add public __rseq_feature_size symbol Michael Jeanson
2024-02-01 19:36 ` [PATCH v7 4/8] nptl: Add features to internal 'struct rseq_area' Michael Jeanson
2024-02-01 19:36 ` [PATCH v7 5/8] nptl: Add rseq internal utils Michael Jeanson
2024-02-01 19:36 ` [PATCH v7 6/8] x86-64: Add rseq_load32_load32_relaxed Michael Jeanson
2024-02-01 19:36 ` [PATCH v7 7/8] aarch64: " Michael Jeanson
2024-02-01 19:36 ` [PATCH v7 8/8] Linux: Use rseq to accelerate getcpu Michael Jeanson
2024-02-02 15:40 ` Michael Jeanson [this message]
2024-02-02 16:18   ` [PATCH v7 0/8] Extend rseq support Adhemerval Zanella Netto

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