The stored logit hashes depend on the platform's math library as well
as on the code, but a mismatch blamed only the code. Each platform's
lines now carry a `math-library` line naming the library they were
made with (macOS 27.2's libsystem_m, Ubuntu GLIBC 2.39 on Linux arm64,
2.43 on Linux x86_64). A mismatch names it, says whether the ways of
running the model agree with each other (if they do, this
environment's library may round differently), and says how to tell.
examples/cohere2_reference.rs is the generator: the test's checkpoints,
scenario and hash, through forward_prompt and forward_token only, so it
runs unchanged at 30c4cf1ee. Run there, with and without rayon, it
reproduces all 78 stored lines on all three platforms, and it prints
the `math-library` line for a new one.
With JOULECLAW_FABRIC=1 in the environment, the main check ran in a
child process and the 1- and 3-thread checks never ran at all. The
test process now checks nothing itself: it starts one child per
configuration, each with the fabric off, and each child must report
its check.
Tests failing first: the mismatch message did not name the library;
a test run with JOULECLAW_FABRIC=1 reported 0 of its 3 checks. Both
pass now, with the switch unset and set.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
5e03008268