Current state of Open MPI Tes2ng Some concerns that have been voiced Pull Requests and Con2nuous Integra2on (CI) Tes2ng Mechanics of CI Tes2ng and more – open discussion
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MLNX has added a github jenkins hook to open-‐mpi/ompi and
open-‐mpi/ompi-‐release that is triggered when a PR is created with either of these repos as the merge target Light weight, runs in about 15 minutes (usually) Smoke test, not comprehensive HIGHLY VISIBLE, BIG READ X if test doesn’t pass
MTT (MPI Tes2ng Tool) Comprehensive, heavy weight (if many tests run), not a
good candidate for CI tes2ng (can take over 2 hours to run the IBM test suite on a Cray XC using 4 nodes) Requires open systems to be useful (problema2c for sites with restricted access to internet)
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Not obvious to all stake holders what the MLNX test script is
tes2ng Are developers developers beginning to rely on it, and not doing sufficient tes2ng prior to crea2ng a PR? What good is CI tes2ng if its only done on PRs? What about non-‐trivial commits that are checked directly in to master? Likely push back from senior Open MPI developers Mechanics of testing problem Commit policy
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Could use something more comprehensive than current MLNX
jenkins smoke test, but lightweight enough to run as part of tes2ng in a PR workflow Have interested stake holders run CI test for sanity check in addi2on to MLNX, even if only a simple test to make sure ./ autogen.sh; ./configure –prefix=foobar; make check works for your environment . . . to make the jenkins integration *really* awesome, we need to be able to distribute the jenkins work around and have some level of smoke tests be run in different environments (I don't even know if this is possible -- this is one of the things we wanted to discuss in Dallas). Each site could run whatever level of smoke testing that they want (from trivial to a bit more intensive). Jeff Squyres
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Want to make this a produc2ve tool that fits with GitHub’s
social coding so_ware development model Easy enough to use that it encourages contribu2ons (fixes and features) from the broader community Good for peer review of commits that impact the broader community PRs shouldn’t languish in limbo
Robust enough that PR method traps problems BEFORE they
get into master if at all possible, much beber than post commit scrambles
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Some commits don’t need to go through PR: Commits to vendor/contributor specific code, e.g. yalla or usNIC BTL Excep2on here is m4 code that will end up in every stake holders output configure
file Excep2on here is openib BTL. ANYONE MODIFYING THIS BTL HAS TO GET SIGN-‐OFF FROM MLNX since they are the ones stuck suppor2ng it. Yes this includes “performance bugs”. White space changes Bookkeeping/documenta2on changes Ralph on Sundays (?, isn’t this start of work week in Israel) Any code that impact mul2ple stake holders has to go through PR For really big changes (e.g. BTL or MTL interface change), developer should Create topic branch in their github repo Create PR request (include an RFC like writeup in the PR request) Stakeholders test the topic branch against their MTT setup, etc. Stakeholders sign off on the PR Developer merges PR into master
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Key here is visibility – want for PRs to be marked go/
no go before going in to master Should we set up a Jenkins master on a vendor-‐ neutral system (perhaps a VM at IU)? Jenkins master drives slave nodes provided by stake holders Slave nodes have env. specific setups for each stake holder
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Master/slave may not be good Need keywordless ssh? Need jenkins “user” account Have a “repeater” script at IU to “repeat” github
HTTP reqs. to stake holders’ jenkins/whatever – don’t need this how to get results back to github Use bots to add comments to a PR Magic phrase for driving tests by bots Assign to github gurus
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David G., Eugene V., Mike Dubmann – develop bot Stakeholders need to figure out what they want to
test with their “bot” Iterate on Commit Policy – when is PR bypass allowed (Howard P.)
social coding software development model. â Easy enough to use that it encourages contribu#ons (fixes and features) from the broader community. â Good ...
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