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MobileGL/scripts/ci
swung0x48 9fed478dfd [MG_IntegrationTest, scripts] (P7): a server-side magma test knob is registered on split and spawn only, and the parity gate names the five entries tcp cannot carry
ID-P7-31 review, should-fix 1.

Every MGITEST_MAGMA_FORCE_* knob is read BY THE SERVER (the getenv readers in
WireFramebuffer.inc run on the apply thread), and a ctest ENVIRONMENT property only
reaches the process ctest starts - the client. Inproc runs the server in that process
and ServerSpawn.cpp copies ::environ into the spawned child, so both arms see the knob;
the tcp arm's server is the lane-wide TcpServer.Start fixture, started once from
scripts/ci/tcp_server_fixture.py's own os.environ, and nothing a per-case property says
reaches it. The tcp copy of each knob=1 entry ran the DEFAULT arm under a name claiming
otherwise.

Measured, not deduced: a temporary fatal in each of the three readers killed all five
knob=1 entries on split and on spawn and left all five green on tcp.

So ShaderMip1, ShaderMip2, DepthMip, DefaultBlitShape1 and MsResolve1 are registered on
split+spawn only (the first four are package B's pre-existing vacuity of the same
shape). The knob=0 twins DefaultBlitShape0 / MsResolve0 keep their tcp entries: zero is
the default and means the same thing on every arm.

spawn_lane_parity.py names the exception, following ID-P7-14's MAGMA_INPROC_ONLY:
MAGMA_SERVER_ENV_KNOB_NO_TCP, applied through a new compare_arms(no_tcp=) that drops the
keys from the tcp comparison ONLY - folding them into inproc_only would stop requiring
them on spawn, which is where they do most of their work.
2026-09-22 20:05:28 -04:00
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