On 5/20/21 10:48 PM, Kefu Chai 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/paralle... - 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 - drop the cosbench workload from rados/perf test suites
Losing cosbench is unfortunate, but it hasn't been actively developed in 5-6 years. I don't think we should let it hold us back. I'll let others comment on the other stuff. Mark
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@ceph.io To unsubscribe send an email to dev-leave@ceph.io