On Thu, May 20, 2021 at 8:49 PM Kefu Chai <kchai@xxxxxxxxxx> wrote: > > hi folks, > > tl;dr: can we stop building/testing master on bionic for a better GCC? > > long story: two months ago, we migrated[0] our CI jobs running "make > check" from ubuntu/bionic to ubuntu/focal so we have access to more > packages offered by focal for testing. > > but we are still suffering[1] from the ancient packages offered by bionic: > > - buggy tcmalloc. see https://github.com/ceph/ceph/pull/41340 > - GCC 7.5.0 shipped along with ubuntu/bionic. i think the support of > std::filesystem is just the tip of the iceberg, as we've migrated to > C++17, there will be more and more demand for a compiler and a > standard library with better C++17 (and C++20 in future) support. > GCC-7 has good support[2] of C++17, but that does not imply that > libstdc++ shipped along with GCC-7 has. > > but we have to build and test on bionic[3], for couple reasons: > > - some upgrade tests from octopus are performed on bionic. for > instance, see https://github.com/ceph/ceph/tree/master/qa/suites/upgrade/pacific-x/parallel > - cosbench used by perf tests needs bionic: see > https://tracker.ceph.com/issues/49139 > - // please note rados/thrash-old-clients/distro$/ubuntu_18.04.yaml is > safe even after we stop building master on bionic, as we've > switched[4] to cephadm for thrash-old-clients > > and because of https://tracker.ceph.com/issues/50218, we cannot use > ubuntu-toolchain-r PPA repo for newer GCC. > > so, i propose we > > - drop building/testing master on bionic. > - drop the upgrade test from pacific on bionic I think we need to tread carefully here. Losing upgrade test coverage is not ideal. > - drop the cosbench workload from rados/perf test suites I have confirmed again that https://tracker.ceph.com/issues/49139 continues to be a problem with focal so I've proposed https://github.com/ceph/ceph/pull/41486. I'd be curious to know what's the most commonly used rgw workload people use for benchmarking purposes. Perhaps, we should think about integrating it with the perf suite. Thanks, Neha > > what do you think? > > -- > [0] https://tracker.ceph.com/issues/49653 > [1] https://github.com/ceph/ceph/pull/41433#discussion_r636604231 > [2] https://gcc.gnu.org/projects/cxx-status.html > [3] https://github.com/ceph/ceph-build/pull/1794#issuecomment-815435506 > [4] https://github.com/ceph/ceph/pull/32377 > _______________________________________________ > Dev mailing list -- dev@xxxxxxx > To unsubscribe send an email to dev-leave@xxxxxxx > _______________________________________________ Dev mailing list -- dev@xxxxxxx To unsubscribe send an email to dev-leave@xxxxxxx
