On Thu, Jan 8, 2026 at 5:46 PM Neal Cardwell ncardwell@google.com wrote:
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.
Oh, for that part I see you mentioned this already in the cover letter:
The used packetdrill is commit 6f2116af6b7e1936a53e80ab31b77f74abda1aaa of the branch: https://github.com/minuscat/packetdrill_accecn
Thanks! neal