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[106.167.137.155]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3244230b33csm785004a91.2.2025.08.19.02.09.21 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 19 Aug 2025 02:09:22 -0700 (PDT) Message-ID: <19f031e5-0060-4957-8cc8-9cd21e7d6304@gmail.com> Date: Tue, 19 Aug 2025 18:09:20 +0900 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/1] scripts/sphinx-build-wrapper: allow building PDF files in parallel To: Mauro Carvalho Chehab Cc: linux-kernel@vger.kernel.org, Linux Doc Mailing List , corbet@lwn.net, Akira Yokosawa References: <26e5efca73dbd2f863a51018054a749c9e5f5a19.1755540431.git.mchehab+huawei@kernel.org> Content-Language: en-US From: Akira Yokosawa In-Reply-To: <26e5efca73dbd2f863a51018054a749c9e5f5a19.1755540431.git.mchehab+huawei@kernel.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On Mon, 18 Aug 2025 20:10:01 +0200, Mauro Carvalho Chehab wrote: > Use POSIX jobserver when available or -j to run PDF > builds in parallel, restoring pdf build performance. Yet, > running it when debugging troubles is a bad idea, so, when > calling directly via command line, except if "-j" is splicitly > requested, it will serialize the build. > > With such change, a PDF doc builds now takes around 5 minutes > on a Ryzen 9 machine with 32 cpu threads: > > # Explicitly paralelize both Sphinx and LaTeX pdf builds > $ make cleandocs; time scripts/sphinx-build-wrapper pdfdocs -j 33 > > real 5m17.901s > user 15m1.499s > sys 2m31.482s > > # Use POSIX jobserver to paralelize both sphinx-build and LaTeX > $ make cleandocs; time make pdfdocs > > real 5m22.369s > user 15m9.076s > sys 2m31.419s > > # Serializes PDF build, while keeping Sphinx parallelized. > # it is equivalent of passing -jauto via command line > $ make cleandocs; time scripts/sphinx-build-wrapper pdfdocs > > real 11m20.901s > user 13m2.910s > sys 1m44.553s > Sounds promising to me! I couldn't test this because I couldn't apply your sphinx-build-wrapper series on top of docs-next. :-/ Which commit does it based on? Thanks, Akira > Reported-by: Akira Yokosawa > Closes: https://lore.kernel.org/linux-doc/9b3b0430-066f-486e-89cc-00e6f1f3b096@gmail.com/ > Signed-off-by: Mauro Carvalho Chehab > --- > scripts/sphinx-build-wrapper | 141 ++++++++++++++++++++++++++--------- > 1 file changed, 106 insertions(+), 35 deletions(-)