On Thu, Jan 8, 2026 at 10:58 AM chia-yu.chang@nokia-bell-labs.com wrote:
From: Chia-Yu Chang chia-yu.chang@nokia-bell-labs.com
Linux Accurate ECN test sets using ACE counters and AccECN options to cover several scenarios: Connection teardown, different ACK conditions, counter wrapping, SACK space grabbing, fallback schemes, negotiation retransmission/reorder/loss, AccECN option drop/loss, different handshake reflectors, data with marking, and different sysctl values.
Co-developed-by: Ilpo Järvinen ij@kernel.org Signed-off-by: Ilpo Järvinen ij@kernel.org Co-developed-by: Neal Cardwell ncardwell@google.com Signed-off-by: Neal Cardwell ncardwell@google.com
Chia-Yu, thank you for posting the packetdrill tests.
A couple thoughts:
(1) These tests are using the experimental AccECN packetdrill support that is not in mainline packetdrill yet. Can you please share the github URL for the version of packetdrill you used? I will work on merging the appropriate experimental AccECN packetdrill support into the Google packetdrill mainline branch.
(2) The last I heard, the tools/testing/selftests/net/packetdrill/ infrastructure does not run tests in subdirectories of that packetdrill/ directory, and that is why all the tests in tools/testing/selftests/net/packetdrill/ are in a single directory. When you run these tests, do all the tests actually get run? Just wanted to check this. :-)
Thanks! neal