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selftests: drv-net: split gro.py into one test per coalescing mode

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gro.py runs its full set of cases three times over - against SW GRO,
HW GRO and LRO. It's our test with the longest runtime. The 318 cases
take 12m30s on mlx5 with a debug kernel.

Bumping the timeout for all tests feels wrong when we can so easily
split the GRO test by execution mode. Shorter runtime also helps retry
just the failing portion / mode (we retry failing tests to try to
detect flakes vs real failures).

Move the main logic to gro_lib.py and add one program per mode -
gro_sw.py, gro_hw.py and gro_lro.py, 102 cases each. Move PPPoE to
a dedicated test. It has been tacked onto the tests in an ugly way,
and it only runs against SW GRO anyway.

Note that unfortunately this will case a rename of all test cases.
The mode moves from the case name to the test name

  gro.py test.sw_ipv4_data_same

becomes

  gro_sw.py test.ipv4_data_same

Reviewed-by: Joe Damato <joe@dama.to>
Reviewed-by: Nimrod Oren <noren@nvidia.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20260901200728.2063720-3-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jakub Kicinski 2026-09-01 13:07:27 -07:00
commit f225a7317c
8 changed files with 561 additions and 475 deletions
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