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([2804:1b3:a7c3:574b:1518:43f4:7a80:c00f]) by smtp.gmail.com with ESMTPSA id f16-20020a63f110000000b005cfb6e7b0c7sm1922123pgi.39.2024.02.02.08.18.23 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 02 Feb 2024 08:18:24 -0800 (PST) Message-ID: Date: Fri, 2 Feb 2024 13:18:21 -0300 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v7 0/8] Extend rseq support Content-Language: en-US To: Michael Jeanson , libc-alpha@sourceware.org References: <20240201193648.584917-1-mjeanson@efficios.com> <1eb3ad80-a52f-4176-bc6b-836528c84c48@efficios.com> From: Adhemerval Zanella Netto Organization: Linaro In-Reply-To: <1eb3ad80-a52f-4176-bc6b-836528c84c48@efficios.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-5.8 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS,TXREP,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: On 02/02/24 12:40, Michael Jeanson wrote: > 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? The 'make update-abi' on the build folder will sort this out.