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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: siemens.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: AM9PR10MB4869.EURPRD10.PROD.OUTLOOK.COM X-MS-Exchange-CrossTenant-Network-Message-Id: 502818cd-4120-4c5e-e39a-08da6665c2ec X-MS-Exchange-CrossTenant-originalarrivaltime: 15 Jul 2022 13:27:27.4068 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 38ae3bcd-9579-4fd4-adda-b42e1495d55a X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: IUzAQ3GrrOB/VQZlueJcDBAKRM3H4dEuiVQWIowxQZSsBirXXKzcPlxJrKRQbnfniCbfWJB9tLIjfjoiQCxY5FEQcnKVTkhAJIj5hmdc7O4= X-MS-Exchange-Transport-CrossTenantHeadersStamped: HE1PR1001MB1131 X-TUID: uFqr1LjtfA37 > -----Original Message----- > From: isar-users@googlegroups.com On > Behalf Of Uladzimir Bely > Sent: Friday, July 15, 2022 1:27 PM > To: isar-users@googlegroups.com > Subject: [PATCH] sbuild: Fix low hit ratio for ccache on linux kernel reb= uild >=20 > For some targets defconfig for linux recipe includes option > CONFIG_DEBUG_INFO that embeds absolute path to the source files into > compiled binaries. >=20 > While sbuild uses unique directory to place sources for each build by def= ault, it > happens that ccache hits ration is to small on rebuild. >=20 > This patch makes sbuild use the same build directory for sequential build= s. While > several packages can be built in parallel (e.g. same package for differen= t > architectures), WORKDIR is used to generate hash part for the build direc= tory of > sbuild. >=20 > Signed-off-by: Uladzimir Bely > --- > meta/classes/dpkg.bbclass | 3 +++ > 1 file changed, 3 insertions(+) >=20 > diff --git a/meta/classes/dpkg.bbclass b/meta/classes/dpkg.bbclass index > b726ea9d..016e46c4 100644 > --- a/meta/classes/dpkg.bbclass > +++ b/meta/classes/dpkg.bbclass > @@ -82,6 +82,8 @@ dpkg_runbuild() { > sh -c "cd ${WORKDIR}; dpkg-source -q -b ${PPS}" > DSC_FILE=3D$(find ${WORKDIR} -name "${DEB_SOURCE_NAME}*.dsc" -print) >=20 > + build_path_hash=3D$(echo "${WORKDIR}" | md5sum | cut -b1-6) > + > sbuild -A -n -c ${SBUILD_CHROOT} --extra-repository=3D"${ISAR_APT_RE= PO}" \ > --host=3D${PACKAGE_ARCH} --build=3D${SBUILD_HOST_ARCH} ${profile= s} \ > --no-run-lintian --no-run-piuparts --no-run-autopkgtest --resolv= e- > alternatives \ @@ -91,6 +93,7 @@ dpkg_runbuild() { > --finished-build-commands=3D"cp -n --no-preserve=3Downer ${deb_d= ir}/*.deb -t > ${ext_deb_dir}/ || :" \ > --finished-build-commands=3D"cp /var/log/dpkg.log > ${ext_root}/dpkg_partial.log" \ > --debbuildopts=3D"--source-option=3D-I" \ > + --build-path=3D"/build/${PN}-${build_path_hash}" \ This is just a workaround that hides the problem. Debian takes a lot of care to improve the reproducibility of their packages= . IIRC then reproducibility issues will be treated as bugs from bookworm on. Could we please do the same and fix the corresponding recipes (like the ker= nel recipe)? Please also have a look at the reproducibility section of dpkg-buildflags. The only reason the kernel is affected from this is, that the kbuild only u= ses KCFLAGS, not CFLAGS. At least the flags about reproducibility should be added to all kernel buil= ds done via ISAR. In short: I'm strictly against this workaround. Having things that are not reproducible should hurt and not become accepted= . Felix > --build-dir=3D${WORKDIR} --dist=3D"isar" ${DSC_FILE} >=20 > sbuild_dpkg_log_export "${WORKDIR}/rootfs/dpkg_partial.log" > -- > 2.20.1 >=20 > -- > You received this message because you are subscribed to the Google Groups > "isar-users" group. > To unsubscribe from this group and stop receiving emails from it, send an= email > to isar-users+unsubscribe@googlegroups.com. > To view this discussion on the web visit > https://eur01.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fgroup= s.g > oogle.com%2Fd%2Fmsgid%2Fisar-users%2F20220715112716.2460-1- > ubely%2540ilbers.de&data=3D05%7C01%7Cfelix.moessbauer%40siemens.co > m%7C2fbec95c6a0a48bcfa1608da6654fc4b%7C38ae3bcd95794fd4addab42e14 > 95d55a%7C1%7C0%7C637934812445713510%7CUnknown%7CTWFpbGZsb3d8e > yJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7 > C3000%7C%7C%7C&sdata=3DH%2FfsTUORIfNFM7jh8CYiCNkuf7T66oxH31mh > 1v2Leo0%3D&reserved=3D0.