Hi Yu He,
This code is simply using integer arithmetics (float is not really possible in
the kernel), left-shifting the fractional value of g by 1024 (10 bits).
Max_alpha_value = 1024 is “1” shifted left by 10.
Agreed that this is not clearly documented, and I believe the sysctl handler
also
Hi,
glad to see interest in DCTCP!
On 2019-6-4, at 11:05, Yu He via freebsd-net wrote:
> In line 387 of file cc_tcp.c, the update of alpha is calculated by following
> code:
>
> dctcp_data->alpha = min(alpha_prev - (alpha_prev >> V_dctcp_shift_g) +
> (dctcp_data->bytes_ecn << (10 -
