wassnameandClaudypoo b8dcb4ec33 diag: count zero-variance-skipped GRPO groups per step (zerovar=) ...

Tests the post-saturation collapse mechanism for vanilla long runs: as a
loophole saturates, every rollout in a group hacks -> identical reward ->
group hits the Dr.GRPO zero-variance skip -> no learning signal. Prediction:
zerovar climbs toward max right as lp_s starts collapsing (~step 80 in job 85).
Surfaced on the existing per-step diag debug line, not the streaming table.

Co-Authored-By: Claudypoo <288921227+claudypoo@users.noreply.github.com>

2026-06-03 04:20:03 +00:00

..

projected_grpo

diag: count zero-variance-skipped GRPO groups per step (zerovar=)

2026-06-03 04:20:03 +00:00