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([2001:8b0:aba:5f3c:61a5:11c7:4181:c4a3]) by smtp.gmail.com with ESMTPSA id cf2-20020a5d5c82000000b0033b7263702csm8896880wrb.29.2024.02.13.04.31.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 13 Feb 2024 04:31:49 -0800 (PST) Message-ID: Subject: Re: [bitbake-devel] regression of 'world' performance? From: Richard Purdie To: Ross Burton , Alexander Kanavin Cc: Khem Raj , bitbake-devel , Randy MacLeod , Mark Hatle Date: Tue, 13 Feb 2024 12:31:49 +0000 In-Reply-To: <2EFB6610-C5FF-4CA0-9309-596601D44393@arm.com> References: <0186f166a0ded0d97d5e19f64a3dd8e5ad44a92f.camel@linuxfoundation.org> <947006112712dcca07c607eb6b49b7e4e475c3d9.camel@linuxfoundation.org> <829c8fff2e6735297f036fdb878f4d244cf08f91.camel@linuxfoundation.org> <17B24084174823DE.15017@lists.openembedded.org> <17B255DB2CE33879.588@lists.openembedded.org> <17B257441406400D.588@lists.openembedded.org> <17B2894C95E031D0.14481@lists.openembedded.org> <17B29B2072FF51A8.14481@lists.openembedded.org> <7bb8798da40488ad8f79f472775e2ee2c2a9c8e2.camel@linuxfoundation.org> <2EFB6610-C5FF-4CA0-9309-596601D44393@arm.com> Autocrypt: addr=richard.purdie@linuxfoundation.org; prefer-encrypt=mutual; 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YNvg== Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.50.0-1 MIME-Version: 1.0 List-Id: X-Webhook-Received: from li982-79.members.linode.com [45.33.32.79] by aws-us-west-2-korg-lkml-1.web.codeaurora.org with HTTPS for ; Tue, 13 Feb 2024 12:31:54 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/bitbake-devel/message/15886 On Tue, 2024-02-13 at 10:49 +0000, Ross Burton wrote: > What might be useful here is finding a host distro with Python=C2=A0 > 3.12 (or using our buildtools), as Python 3.12 has perf integration: >=20 > https://docs.python.org/3/howto/perf_profiling.html >=20 > Perf=E2=80=99s direct profiling might be more accessible and accurate tha= n=C2=A0 > the profiling built into bitbake. >=20 The profiling "built into bitbake" is using python's own internal performance code using cprofile and pstats so those are deterministic profiles with exact call counts. perf is statistical profiler so it will show information differently as averages. Both have a time and a place and it could be interesting, just flagging the difference (and that we're using python's own profiling tooling for this). Cheers, Richard