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tcp: allow cc algos to set pacing rate

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Type: feature

Change-Id: Ie7f0f5d2a476d401ede567e422abb953b2bb4a78
Signed-off-by: Florin Coras <fcoras@cisco.com>
This commit is contained in:
Florin Coras
2019-08-16 10:33:49 -07:00
committed by Damjan Marion
parent 14bea1bb65
commit d206724e78
2 changed files with 15 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
src/vnet/tcp/tcp.c
View File

@ -1263,17 +1263,11 @@ const static transport_proto_vft_t tcp_proto = {
void void
tcp_connection_tx_pacer_update (tcp_connection_t * tc) tcp_connection_tx_pacer_update (tcp_connection_t * tc)
{ {
f64 srtt;
u64 rate;
if (!transport_connection_is_tx_paced (&tc->connection)) if (!transport_connection_is_tx_paced (&tc->connection))
return; return;
srtt = clib_min ((f64) tc->srtt * TCP_TICK, tc->mrtt_us); transport_connection_tx_pacer_update (&tc->connection,
/* TODO should constrain to interface's max throughput but tcp_cc_get_pacing_rate (tc));
* we don't have link speeds for sw ifs ..*/
rate = tc->cwnd / srtt;
transport_connection_tx_pacer_update (&tc->connection, rate);
} }
void void

13
src/vnet/tcp/tcp.h
View File

@ -417,6 +417,7 @@ struct _tcp_cc_algorithm
void (*recovered) (tcp_connection_t * tc); void (*recovered) (tcp_connection_t * tc);
void (*undo_recovery) (tcp_connection_t * tc); void (*undo_recovery) (tcp_connection_t * tc);
void (*event) (tcp_connection_t *tc, tcp_cc_event_t evt); void (*event) (tcp_connection_t *tc, tcp_cc_event_t evt);
u64 (*get_pacing_rate) (tcp_connection_t *tc);
}; };
/* *INDENT-ON* */ /* *INDENT-ON* */
@ -1053,6 +1054,18 @@ tcp_cc_event (tcp_connection_t * tc, tcp_cc_event_t evt)
tc->cc_algo->event (tc, evt); tc->cc_algo->event (tc, evt);
} }
static inline u64
tcp_cc_get_pacing_rate (tcp_connection_t * tc)
{
if (tc->cc_algo->get_pacing_rate)
return tc->cc_algo->get_pacing_rate (tc);
f64 srtt = clib_min ((f64) tc->srtt * TCP_TICK, tc->mrtt_us);
/* TODO should constrain to interface's max throughput but
* we don't have link speeds for sw ifs ..*/
return (tc->cwnd / srtt);
}
always_inline void always_inline void
tcp_timer_set (tcp_connection_t * tc, u8 timer_id, u32 interval) tcp_timer_set (tcp_connection_t * tc, u8 timer_id, u32 interval)
{ {