Hi Alice,
On 14/08/2026 21:41, Alice Mikityanska wrote:
> From: Alice Mikityanska <[email protected]>
>
> The combination of checksum offload disabled (that causes software GSO)
> and CONFIG_DEBUG_NET=y is inherently slow. Depending on the CPU power
> and load, RTT may increase, limiting sk_pacing_rate, so tcp_tso_autosize
> caps SKBs at around 40 segments, and zero BIG TCP packets are produced.
>
> Increase sysctl net.ipv4.tcp_min_tso_segs and set a bigger initial value
> of CWND in these configurations to force BIG TCP.
Just an innocent question: would it affect the test somehow if the
sysctl and initial cwnd is always modified, not just for a specific config?
(Note that apart from looking at ${KSFT_MACHINE_SLOW} in patch 2, I
think the series looks good to me, and can probably be sent to net after
the merge with net-next.)
Cheers,
Matt
