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git.proxmox.com Git - mirror_iproute2.git/blob - tc/tc_estimator.c
2 * tc_core.c TC core library.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
18 #include <sys/socket.h>
19 #include <netinet/in.h>
20 #include <arpa/inet.h>
26 int tc_setup_estimator(unsigned int A
, unsigned int time_const
, struct tc_estimator
*est
)
28 for (est
->interval
= 0; est
->interval
<= 5; est
->interval
++) {
29 if (A
<= (1<<est
->interval
)*(TIME_UNITS_PER_SEC
/4))
32 if (est
->interval
> 5)
35 for (est
->ewma_log
= 1; est
->ewma_log
< 32; est
->ewma_log
++) {
36 double w
= 1.0 - 1.0/(1<<est
->ewma_log
);
38 if (A
/(-log(w
)) > time_const
)
42 if (est
->ewma_log
== 0 || est
->ewma_log
>= 31)