selftests: drv-net: in so_txtime tell apart sw from hw pacing

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Detect software pacing in so_txtime.c using SO_TIMESTAMPING.

If '-H' (hw) is passed

1. measure sw tx delay with SOF_TIMESTAMPING_TX_SOFTWARE, and
2. fail if delay exceeds a threshold, indicating pacing

This will be used in the next patch in the series.

Also extend while condition to account for possible variance.
This applies to all tests, not just the new '-H' variants.

Also reorder getopt parameters to make them alphabetical.

Signed-off-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20260910171131.2532487-7-willemdebruijn.kernel@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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Willem de Bruijn 2026-09-10 13:10:25 -04:00 • committed by Jakub Kicinski

parent 2d5c630e6c

commit 4e50c0265f

1 changed files with 79 additions and 16 deletions

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tools/testing/selftests/drivers/net/so_txtime.c

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