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traffic-pacing-edt: edt_pacer02.c add ECN marking horizon

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Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
This commit is contained in:
Jesper Dangaard Brouer
2020-11-14 17:16:03 +01:00
parent 5a3e52cf43
commit 9f97d984cb
1 changed files with 6 additions and 1 deletions
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7
traffic-pacing-edt/edt_pacer02.c
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@ -10,12 +10,15 @@ char _license[] SEC("license") = "GPL";
/* skb->len in bytes, thus easier to keep rate in bytes */
#define RATE_IN_BITS (1000 * 1000 * 1000ULL)
//#define RATE_IN_BITS (500 * 1000 * 1000ULL)
#define RATE_IN_BYTES (RATE_IN_BITS / 8)
#define T_HORIZON_DROP (2000 * 1000 * 1000ULL)
//#define T_HORIZON_DROP (200000 * 1000 * 1000ULL)
//#define T_HORIZON_DROP (20 * 1000 * 1000ULL)
#define T_HORIZON_ECN (5 * 1000 * 1000ULL)
/* FIXME add proper READ_ONCE / WRITE_ONCE macros, for now use for annotation */
#define READ_ONCE(V) (V)
#define WRITE_ONCE(X,V) (X) = (V)
@ -97,7 +100,9 @@ static __always_inline int sched_departure(struct __sk_buff *skb)
if (t_queue_sz >= T_HORIZON_DROP /* edt->t_horizon_drop */)
return BPF_DROP;
// TODO Add ECN marking horizon
/* ECN marking horizon */
if (t_queue_sz >= T_HORIZON_ECN)
bpf_skb_ecn_set_ce(skb);
/* Advance "time queue" */
WRITE_ONCE(edt->t_last, t_next);