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head/sys/netinet/tcp_stacks/tcp_bbr.h
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svn:eol-style | null | native \ No newline at end of property |
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svn:mime-type | null | text/plain \ No newline at end of property |
/*- | |||||
* Copyright (c) 2016-9 | |||||
* Netflix Inc. All rights reserved. | |||||
* Author Randall R. Stewart | |||||
* | |||||
* Redistribution and use in source and binary forms, with or without | |||||
* modification, are permitted provided that the following conditions | |||||
* are met: | |||||
* 1. Redistributions of source code must retain the above copyright | |||||
* notice, this list of conditions and the following disclaimer. | |||||
* 2. Redistributions in binary form must reproduce the above copyright | |||||
* notice, this list of conditions and the following disclaimer in the | |||||
* documentation and/or other materials provided with the distribution. | |||||
* | |||||
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |||||
* SUCH DAMAGE. | |||||
* | |||||
* $FreeBSD$ | |||||
*/ | |||||
#ifndef _NETINET_TCP_BBR_H_ | |||||
#define _NETINET_TCP_BBR_H_ | |||||
#define BBR_INITIAL_RTO 1000000 /* 1 second in micro-seconds */ | |||||
/* Send map flags */ | |||||
#define BBR_ACKED 0x0001 /* The remote endpoint acked this */ | |||||
#define BBR_WAS_RENEGED 0x0002 /* The peer reneged the ack */ | |||||
#define BBR_RXT_CLEARED 0x0004 /* ACK Cleared by the RXT timer */ | |||||
#define BBR_OVERMAX 0x0008 /* We have more retran's then we can | |||||
* fit */ | |||||
#define BBR_SACK_PASSED 0x0010 /* A sack was done above this block */ | |||||
#define BBR_WAS_SACKPASS 0x0020 /* We retransmitted due to SACK pass */ | |||||
#define BBR_HAS_FIN 0x0040 /* segment is sent with fin */ | |||||
#define BBR_TLP 0x0080 /* segment sent as tail-loss-probe */ | |||||
#define BBR_HAS_SYN 0x0100 /* segment has the syn */ | |||||
#define BBR_MARKED_LOST 0x0200 /* | |||||
* This segments is lost and | |||||
* totaled into bbr->rc_ctl.rc_lost | |||||
*/ | |||||
#define BBR_RWND_COLLAPSED 0x0400 /* The peer collapsed the rwnd on the segment */ | |||||
#define BBR_NUM_OF_RETRANS 7 | |||||
/* Defines for socket options to set pacing overheads */ | |||||
#define BBR_INCL_ENET_OH 0x01 | |||||
#define BBR_INCL_IP_OH 0x02 | |||||
#define BBR_INCL_TCP_OH 0x03 | |||||
/* | |||||
* With the addition of both measurement algorithms | |||||
* I had to move over the size of a | |||||
* cache line (unfortunately). For now there is | |||||
* no way around this. We may be able to cut back | |||||
* at some point I hope. | |||||
*/ | |||||
struct bbr_sendmap { | |||||
TAILQ_ENTRY(bbr_sendmap) r_next; /* seq number arrayed next */ | |||||
TAILQ_ENTRY(bbr_sendmap) r_tnext; /* Time of tmit based next */ | |||||
uint32_t r_start; /* Sequence number of the segment */ | |||||
uint32_t r_end; /* End seq, this is 1 beyond actually */ | |||||
uint32_t r_rtr_bytes; /* How many bytes have been retransmitted */ | |||||
uint32_t r_delivered; /* Delivered amount at send */ | |||||
uint32_t r_del_time; /* The time of the last delivery update */ | |||||
uint8_t r_rtr_cnt:4, /* Retran count, index this -1 to get time | |||||
* sent */ | |||||
unused_bit:1, | |||||
r_is_drain:1, /* In a draining cycle */ | |||||
r_app_limited:1,/* We went app limited */ | |||||
r_ts_valid:1; /* Timestamp field is valid (r_del_ack_ts) */ | |||||
uint8_t r_dupack; /* Dup ack count */ | |||||
uint8_t r_in_tmap:1, /* Flag to see if its in the r_tnext array */ | |||||
r_is_smallmap:1,/* Was logged as a small-map send-map item */ | |||||
r_is_gain:1, /* Was in gain cycle */ | |||||
r_bbr_state:5; /* The BBR state at send */ | |||||
uint8_t r_limit_type; /* is this entry counted against a limit? */ | |||||
uint16_t r_flags; /* Flags as defined above */ | |||||
uint16_t r_spare16; | |||||
uint32_t r_del_ack_ts; /* At send what timestamp of peer was (if r_ts_valid set) */ | |||||
/****************Cache line*****************/ | |||||
uint32_t r_tim_lastsent[BBR_NUM_OF_RETRANS]; | |||||
/* | |||||
* Question, should we instead just grab the sending b/w | |||||
* from the filter with the gain and store it in a | |||||
* uint64_t instead? | |||||
*/ | |||||
uint32_t r_first_sent_time; /* Time of first pkt in flight sent */ | |||||
uint32_t r_pacing_delay; /* pacing delay of this send */ | |||||
uint32_t r_flight_at_send; /* flight at the time of the send */ | |||||
#ifdef _KERNEL | |||||
} __aligned(CACHE_LINE_SIZE); | |||||
#else | |||||
}; | |||||
#endif | |||||
#define BBR_LIMIT_TYPE_SPLIT 1 | |||||
TAILQ_HEAD(bbr_head, bbr_sendmap); | |||||
#define BBR_SEGMENT_TIME_SIZE 1500 /* How many bytes in time_between */ | |||||
#define BBR_MIN_SEG 1460 /* MSS size */ | |||||
#define BBR_MAX_GAIN_VALUE 0xffff | |||||
#define BBR_TIMER_FUDGE 1500 /* 1.5ms in micro seconds */ | |||||
/* BW twiddle secret codes */ | |||||
#define BBR_RED_BW_CONGSIG 0 /* We enter recovery and set using b/w */ | |||||
#define BBR_RED_BW_RATECAL 1 /* We are calculating the loss rate */ | |||||
#define BBR_RED_BW_USELRBW 2 /* We are dropping the lower b/w with | |||||
* cDR */ | |||||
#define BBR_RED_BW_SETHIGHLOSS 3 /* We have set our highloss value at | |||||
* exit from probe-rtt */ | |||||
#define BBR_RED_BW_PE_CLREARLY 4 /* We have decided to clear the | |||||
* reduction early */ | |||||
#define BBR_RED_BW_PE_CLAFDEL 5 /* We are clearing it on schedule | |||||
* delayed */ | |||||
#define BBR_RED_BW_REC_ENDCLL 6 /* Recover exits save high if needed | |||||
* an clear to start measuring */ | |||||
#define BBR_RED_BW_PE_NOEARLY_OUT 7 /* Set pkt epoch judged that we do not | |||||
* get out of jail early */ | |||||
/* codes for just-return */ | |||||
#define BBR_JR_SENT_DATA 0 | |||||
#define BBR_JR_CWND_LIMITED 1 | |||||
#define BBR_JR_RWND_LIMITED 2 | |||||
#define BBR_JR_APP_LIMITED 3 | |||||
#define BBR_JR_ASSESSING 4 | |||||
/* For calculating a rate */ | |||||
#define BBR_CALC_BW 1 | |||||
#define BBR_CALC_LOSS 2 | |||||
#define BBR_RTT_BY_TIMESTAMP 0 | |||||
#define BBR_RTT_BY_EXACTMATCH 1 | |||||
#define BBR_RTT_BY_EARLIER_RET 2 | |||||
#define BBR_RTT_BY_THIS_RETRAN 3 | |||||
#define BBR_RTT_BY_SOME_RETRAN 4 | |||||
#define BBR_RTT_BY_TSMATCHING 5 | |||||
/* Markers to track where we enter persists from */ | |||||
#define BBR_PERSISTS_FROM_1 1 | |||||
#define BBR_PERSISTS_FROM_2 2 | |||||
#define BBR_PERSISTS_FROM_3 3 | |||||
#define BBR_PERSISTS_FROM_4 4 | |||||
#define BBR_PERSISTS_FROM_5 5 | |||||
/* magic cookies to ask for the RTT */ | |||||
#define BBR_RTT_PROP 0 | |||||
#define BBR_RTT_RACK 1 | |||||
#define BBR_RTT_PKTRTT 2 | |||||
#define BBR_SRTT 3 | |||||
#define BBR_SACKED 0 | |||||
#define BBR_CUM_ACKED 1 | |||||
/* threshold in useconds where we consider we need a higher min cwnd */ | |||||
#define BBR_HIGH_SPEED 1000 | |||||
#define BBR_HIGHSPEED_NUM_MSS 12 | |||||
#define MAX_REDUCE_RXT 3 /* What is the maximum times we are willing to | |||||
* reduce b/w in RTX's. Setting this has a | |||||
* multiplicative effect e.g. if we are | |||||
* reducing by 20% then setting it to 3 means | |||||
* you will have reduced the b/w estimate by > | |||||
* 60% before you stop. */ | |||||
/* | |||||
* We use the rate sample structure to | |||||
* assist in single sack/ack rate and rtt | |||||
* calculation. In the future we will expand | |||||
* this in BBR to do forward rate sample | |||||
* b/w estimation. | |||||
*/ | |||||
#define BBR_RS_RTT_EMPTY 0x00000001 /* Nothing yet stored in RTT's */ | |||||
#define BBR_RS_BW_EMPTY 0x00000002 /* Nothing yet stored in cDR */ | |||||
#define BBR_RS_RTT_VALID 0x00000004 /* We have at least one valid RTT */ | |||||
#define BBR_RS_BW_VAILD 0x00000008 /* We have a valid cDR */ | |||||
#define BBR_RS_EMPTY (BBR_RS_RTT_EMPTY|BBR_RS_BW_EMPTY) | |||||
struct bbr_rtt_sample { | |||||
uint32_t rs_flags; | |||||
uint32_t rs_rtt_lowest; | |||||
uint32_t rs_rtt_lowest_sendtime; | |||||
uint32_t rs_rtt_low_seq_start; | |||||
uint32_t rs_rtt_highest; | |||||
uint32_t rs_rtt_cnt; | |||||
uint64_t rs_rtt_tot; | |||||
uint32_t cur_rtt; | |||||
uint32_t cur_rtt_bytecnt; | |||||
uint32_t cur_rtt_rsmcnt; | |||||
uint32_t rc_crtt_set:1, | |||||
avail_bits:31; | |||||
uint64_t rs_cDR; | |||||
}; | |||||
/* RTT shrink reasons */ | |||||
#define BBR_RTTS_INIT 0 | |||||
#define BBR_RTTS_NEWRTT 1 | |||||
#define BBR_RTTS_RTTPROBE 2 | |||||
#define BBR_RTTS_WASIDLE 3 | |||||
#define BBR_RTTS_PERSIST 4 | |||||
#define BBR_RTTS_REACHTAR 5 | |||||
#define BBR_RTTS_ENTERPROBE 6 | |||||
#define BBR_RTTS_SHRINK_PG 7 | |||||
#define BBR_RTTS_SHRINK_PG_FINAL 8 | |||||
#define BBR_RTTS_NEW_TARGET 9 | |||||
#define BBR_RTTS_LEAVE_DRAIN 10 | |||||
#define BBR_RTTS_RESETS_VALUES 11 | |||||
#define BBR_NUM_RATES 5 | |||||
/* Rate flags */ | |||||
#define BBR_RT_FLAG_FREE 0x00 /* Is on the free list */ | |||||
#define BBR_RT_FLAG_INUSE 0x01 /* Has been allocated */ | |||||
#define BBR_RT_FLAG_READY 0x02 /* Ready to initiate a measurement. */ | |||||
#define BBR_RT_FLAG_CAPPED_PRE 0x04 /* Ready to cap if we send the next segment */ | |||||
#define BBR_RT_FLAG_CAPPED 0x08 /* Measurement is capped */ | |||||
#define BBR_RT_FLAG_PASTFA 0x10 /* Past the first ack. */ | |||||
#define BBR_RT_FLAG_LIMITED 0x20 /* Saw application/cwnd or rwnd limited period */ | |||||
#define BBR_RT_SEEN_A_ACK 0x40 /* A ack has been saved */ | |||||
#define BBR_RT_PREV_RTT_SET 0x80 /* There was a RTT set in */ | |||||
#define BBR_RT_PREV_SEND_TIME 0x100 /* | |||||
*There was a RTT send time set that can be used | |||||
* no snd_limits | |||||
*/ | |||||
#define BBR_RT_SET_GRADIENT 0x200 | |||||
#define BBR_RT_TS_VALID 0x400 | |||||
struct bbr_log { | |||||
union { | |||||
struct bbr_sendmap *rsm; /* For alloc/free */ | |||||
uint64_t sb_acc; /* For out/ack or t-o */ | |||||
}; | |||||
struct tcpcb *tp; | |||||
uint32_t t_flags; | |||||
uint32_t th_seq; | |||||
uint32_t th_ack; | |||||
uint32_t snd_una; | |||||
uint32_t snd_nxt; | |||||
uint32_t snd_max; | |||||
uint32_t snd_cwnd; | |||||
uint32_t snd_wnd; | |||||
uint32_t rc_lost; | |||||
uint32_t target_cwnd; /* UU */ | |||||
uint32_t inflight; /* UU */ | |||||
uint32_t applimited; /* UU */ | |||||
/* Things for BBR */ | |||||
uint32_t delivered; /* UU */ | |||||
uint64_t cur_del_rate; /* UU */ | |||||
uint64_t delRate; /* UU */ | |||||
uint64_t rttProp; /* UU */ | |||||
uint64_t lt_bw; /* UU */ | |||||
uint32_t timeStamp; | |||||
uint32_t time; | |||||
uint32_t slot; /* UU */ | |||||
uint32_t delayed_by; | |||||
uint32_t exp_del; | |||||
uint32_t pkts_out; | |||||
uint32_t new_win; | |||||
uint32_t hptsi_gain; /* UU */ | |||||
uint32_t cwnd_gain; /* UU */ | |||||
uint32_t epoch; /* UU */ | |||||
uint32_t lt_epoch; /* UU */ | |||||
/* Sack fun */ | |||||
uint32_t blk_start[4]; /* xx */ | |||||
uint32_t blk_end[4]; | |||||
uint32_t len; /* Timeout T3=1, TLP=2, RACK=3 */ | |||||
uint8_t type; | |||||
uint8_t n_sackblks; | |||||
uint8_t applied; /* UU */ | |||||
uint8_t inhpts; /* UU */ | |||||
uint8_t ininput; /* UU */ | |||||
uint8_t use_lt_bw; /* UU */ | |||||
}; | |||||
struct bbr_log_sysctl_out { | |||||
uint32_t bbr_log_at; | |||||
uint32_t bbr_log_max; | |||||
struct bbr_log entries[0]; | |||||
}; | |||||
/* | |||||
* Magic numbers for logging timeout events if the | |||||
* logging is enabled. | |||||
*/ | |||||
#define BBR_TO_FRM_TMR 1 | |||||
#define BBR_TO_FRM_TLP 2 | |||||
#define BBR_TO_FRM_RACK 3 | |||||
#define BBR_TO_FRM_KEEP 4 | |||||
#define BBR_TO_FRM_PERSIST 5 | |||||
#define BBR_TO_FRM_DELACK 6 | |||||
#define BBR_SEES_STRETCH_ACK 1 | |||||
#define BBR_SEES_COMPRESSED_ACKS 2 | |||||
/* | |||||
* As we get each SACK we wade through the | |||||
* rc_map and mark off what is acked. | |||||
* We also increment rc_sacked as well. | |||||
* | |||||
* We also pay attention to missing entries | |||||
* based on the time and possibly mark them | |||||
* for retransmit. If we do and we are not already | |||||
* in recovery we enter recovery. In doing | |||||
* so we claer prr_delivered/holes_rxt and prr_sent_dur_rec. | |||||
* We also setup rc_next/rc_snd_nxt/rc_send_end so | |||||
* we will know where to send from. When not in | |||||
* recovery rc_next will be NULL and rc_snd_nxt should | |||||
* equal snd_max. | |||||
* | |||||
* Whenever we retransmit from recovery we increment | |||||
* rc_holes_rxt as we retran a block and mark it as retransmitted | |||||
* with the time it was sent. During non-recovery sending we | |||||
* add to our map and note the time down of any send expanding | |||||
* the rc_map at the tail and moving rc_snd_nxt up with snd_max. | |||||
* | |||||
* In recovery during SACK/ACK processing if a chunk has | |||||
* been retransmitted and it is now acked, we decrement rc_holes_rxt. | |||||
* When we retransmit from the scoreboard we use | |||||
* rc_next and rc_snd_nxt/rc_send_end to help us | |||||
* find what needs to be retran. | |||||
* | |||||
* To calculate pipe we simply take (snd_max - snd_una) + rc_holes_rxt | |||||
* This gets us the effect of RFC6675 pipe, counting twice for | |||||
* bytes retransmitted. | |||||
*/ | |||||
#define TT_BBR_FR_TMR 0x2001 | |||||
#define BBR_SCALE 8 | |||||
#define BBR_UNIT (1 << BBR_SCALE) | |||||
#define BBR_NUM_RTTS_FOR_DEL_LIMIT 8 /* How many pkt-rtts do we keep | |||||
* Delivery rate for */ | |||||
#define BBR_NUM_RTTS_FOR_GOOG_DEL_LIMIT 10 /* How many pkt-rtts do we keep | |||||
* Delivery rate for google */ | |||||
#define BBR_SECONDS_NO_RTT 10 /* 10 seconds with no RTT shrinkage */ | |||||
#define BBR_PROBERTT_MAX 200 /* 200ms */ | |||||
#define BBR_PROBERTT_NUM_MSS 4 | |||||
#define BBR_STARTUP_EPOCHS 3 | |||||
#define USECS_IN_MSEC 1000 | |||||
#define BBR_TIME_TO_SECONDS(a) (a / USECS_IN_SECOND) | |||||
#define BBR_TIME_TO_MILLI(a) (a / MS_IN_USEC) | |||||
/* BBR keeps time in usec's so we divide by 1000 and round up */ | |||||
#define BBR_TS_TO_MS(t) ((t+999)/MS_IN_USEC) | |||||
/* | |||||
* Locking for the rack control block. | |||||
* a) Locked by INP_WLOCK | |||||
* b) Locked by the hpts-mutex | |||||
* | |||||
*/ | |||||
#define BBR_STATE_STARTUP 0x01 | |||||
#define BBR_STATE_DRAIN 0x02 | |||||
#define BBR_STATE_PROBE_BW 0x03 | |||||
#define BBR_STATE_PROBE_RTT 0x04 | |||||
#define BBR_STATE_IDLE_EXIT 0x05 | |||||
/* Substate defines for STATE == PROBE_BW */ | |||||
#define BBR_SUB_GAIN 0 /* State 0 where we are 5/4 BBR_UNIT */ | |||||
#define BBR_SUB_DRAIN 1 /* State 1 where we are at 3/4 BBR_UNIT */ | |||||
#define BBR_SUB_LEVEL1 2 /* State 1 first BBR_UNIT */ | |||||
#define BBR_SUB_LEVEL2 3 /* State 2nd BBR_UNIT */ | |||||
#define BBR_SUB_LEVEL3 4 /* State 3rd BBR_UNIT */ | |||||
#define BBR_SUB_LEVEL4 5 /* State 4th BBR_UNIT */ | |||||
#define BBR_SUB_LEVEL5 6 /* State 5th BBR_UNIT */ | |||||
#define BBR_SUB_LEVEL6 7 /* State last BBR_UNIT */ | |||||
#define BBR_SUBSTATE_COUNT 8 | |||||
/* Single remaining reduce log */ | |||||
#define BBR_REDUCE_AT_FR 5 | |||||
#define BBR_BIG_LOG_SIZE 300000 | |||||
/* Bits per second in bytes per second */ | |||||
#define FORTY_EIGHT_MBPS 6000000 /* 48 megabits in bytes */ | |||||
#define THIRTY_MBPS 3750000 /* 30 megabits in bytes */ | |||||
#define TWENTY_THREE_MBPS 2896000 | |||||
#define FIVETWELVE_MBPS 64000000 /* 512 megabits in bytes */ | |||||
#define ONE_POINT_TWO_MEG 150000 /* 1.2 megabits in bytes */ | |||||
struct bbr_stats { | |||||
uint64_t bbr_badfr; /* 0 */ | |||||
uint64_t bbr_badfr_bytes; /* 1 */ | |||||
uint64_t bbr_saw_oerr; /* 2 */ | |||||
uint64_t bbr_saw_emsgsiz; /* 3 */ | |||||
uint64_t bbr_reorder_seen; /* 4 */ | |||||
uint64_t bbr_tlp_tot; /* 5 */ | |||||
uint64_t bbr_tlp_newdata; /* 6 */ | |||||
uint64_t bbr_offset_recovery; /* 7 */ | |||||
uint64_t bbr_tlp_retran_fail; /* 8 */ | |||||
uint64_t bbr_to_tot; /* 9 */ | |||||
uint64_t bbr_to_arm_rack; /* 10 */ | |||||
uint64_t bbr_enter_probertt; /* 11 */ | |||||
uint64_t bbr_tlp_set; /* 12 */ | |||||
uint64_t bbr_resends_set; /* 13 */ | |||||
uint64_t bbr_force_output; /* 14 */ | |||||
uint64_t bbr_to_arm_tlp; /* 15 */ | |||||
uint64_t bbr_paced_segments; /* 16 */ | |||||
uint64_t bbr_saw_enobuf; /* 17 */ | |||||
uint64_t bbr_to_alloc_failed; /* 18 */ | |||||
uint64_t bbr_to_alloc_emerg; /* 19 */ | |||||
uint64_t bbr_sack_proc_all; /* 20 */ | |||||
uint64_t bbr_sack_proc_short; /* 21 */ | |||||
uint64_t bbr_sack_proc_restart; /* 22 */ | |||||
uint64_t bbr_to_alloc; /* 23 */ | |||||
uint64_t bbr_offset_drop; /* 24 */ | |||||
uint64_t bbr_runt_sacks; /* 25 */ | |||||
uint64_t bbr_sack_passed; /* 26 */ | |||||
uint64_t bbr_rlock_left_ret0; /* 27 */ | |||||
uint64_t bbr_rlock_left_ret1; /* 28 */ | |||||
uint64_t bbr_dynamic_rwnd; /* 29 */ | |||||
uint64_t bbr_static_rwnd; /* 30 */ | |||||
uint64_t bbr_sack_blocks; /* 31 */ | |||||
uint64_t bbr_sack_blocks_skip; /* 32 */ | |||||
uint64_t bbr_sack_search_both; /* 33 */ | |||||
uint64_t bbr_sack_search_fwd; /* 34 */ | |||||
uint64_t bbr_sack_search_back; /* 35 */ | |||||
uint64_t bbr_plain_acks; /* 36 */ | |||||
uint64_t bbr_acks_with_sacks; /* 37 */ | |||||
uint64_t bbr_progress_drops; /* 38 */ | |||||
uint64_t bbr_early; /* 39 */ | |||||
uint64_t bbr_reneges_seen; /* 40 */ | |||||
uint64_t bbr_persist_reneg; /* 41 */ | |||||
uint64_t bbr_dropped_af_data; /* 42 */ | |||||
uint64_t bbr_failed_mbuf_aloc; /* 43 */ | |||||
uint64_t bbr_cwnd_limited; /* 44 */ | |||||
uint64_t bbr_rwnd_limited; /* 45 */ | |||||
uint64_t bbr_app_limited; /* 46 */ | |||||
uint64_t bbr_force_timer_start; /* 47 */ | |||||
uint64_t bbr_hpts_min_time; /* 48 */ | |||||
uint64_t bbr_meets_tso_thresh; /* 49 */ | |||||
uint64_t bbr_miss_tso_rwnd; /* 50 */ | |||||
uint64_t bbr_miss_tso_cwnd; /* 51 */ | |||||
uint64_t bbr_miss_tso_app; /* 52 */ | |||||
uint64_t bbr_miss_retran; /* 53 */ | |||||
uint64_t bbr_miss_tlp; /* 54 */ | |||||
uint64_t bbr_miss_unknown; /* 55 */ | |||||
uint64_t bbr_hdwr_rl_add_ok; /* 56 */ | |||||
uint64_t bbr_hdwr_rl_add_fail; /* 57 */ | |||||
uint64_t bbr_hdwr_rl_mod_ok; /* 58 */ | |||||
uint64_t bbr_hdwr_rl_mod_fail; /* 59 */ | |||||
uint64_t bbr_collapsed_win; /* 60 */ | |||||
uint64_t bbr_alloc_limited; /* 61 */ | |||||
uint64_t bbr_alloc_limited_conns; /* 62 */ | |||||
uint64_t bbr_split_limited; /* 63 */ | |||||
}; | |||||
/* | |||||
* The structure bbr_opt_stats is a simple | |||||
* way to see how many options are being | |||||
* changed in the stack. | |||||
*/ | |||||
struct bbr_opts_stats { | |||||
uint64_t tcp_bbr_pace_per_sec; | |||||
uint64_t tcp_bbr_pace_del_tar; | |||||
uint64_t tcp_bbr_pace_seg_max; | |||||
uint64_t tcp_bbr_pace_seg_min; | |||||
uint64_t tcp_bbr_pace_cross; | |||||
uint64_t tcp_bbr_drain_inc_extra; | |||||
uint64_t tcp_bbr_unlimited; | |||||
uint64_t tcp_bbr_iwintso; | |||||
uint64_t tcp_bbr_rec_over_hpts; | |||||
uint64_t tcp_bbr_recforce; | |||||
uint64_t tcp_bbr_startup_pg; | |||||
uint64_t tcp_bbr_drain_pg; | |||||
uint64_t tcp_bbr_rwnd_is_app; | |||||
uint64_t tcp_bbr_probe_rtt_int; | |||||
uint64_t tcp_bbr_one_retran; | |||||
uint64_t tcp_bbr_startup_loss_exit; | |||||
uint64_t tcp_bbr_use_lowgain; | |||||
uint64_t tcp_bbr_lowgain_thresh; | |||||
uint64_t tcp_bbr_lowgain_half; | |||||
uint64_t tcp_bbr_lowgain_fd; | |||||
uint64_t tcp_bbr_usedel_rate; | |||||
uint64_t tcp_bbr_min_rto; | |||||
uint64_t tcp_bbr_max_rto; | |||||
uint64_t tcp_rack_pace_max_seg; | |||||
uint64_t tcp_rack_min_to; | |||||
uint64_t tcp_rack_reord_thresh; | |||||
uint64_t tcp_rack_reord_fade; | |||||
uint64_t tcp_rack_tlp_thresh; | |||||
uint64_t tcp_rack_pkt_delay; | |||||
uint64_t tcp_bbr_startup_exit_epoch; | |||||
uint64_t tcp_bbr_ack_comp_alg; | |||||
uint64_t tcp_rack_cheat; | |||||
uint64_t tcp_iwnd_tso; | |||||
uint64_t tcp_utter_max_tso; | |||||
uint64_t tcp_hdwr_pacing; | |||||
uint64_t tcp_extra_state; | |||||
uint64_t tcp_floor_min_tso; | |||||
/* New */ | |||||
uint64_t tcp_bbr_algorithm; | |||||
uint64_t tcp_bbr_tslimits; | |||||
uint64_t tcp_bbr_probertt_len; | |||||
uint64_t tcp_bbr_probertt_gain; | |||||
uint64_t tcp_bbr_topaceout; | |||||
uint64_t tcp_use_rackcheat; | |||||
uint64_t tcp_delack; | |||||
uint64_t tcp_maxpeak; | |||||
uint64_t tcp_retran_wtso; | |||||
uint64_t tcp_data_ac; | |||||
uint64_t tcp_ts_raises; | |||||
uint64_t tcp_pacing_oh_tmr; | |||||
uint64_t tcp_pacing_oh; | |||||
uint64_t tcp_policer_det; | |||||
}; | |||||
#ifdef _KERNEL | |||||
#define BBR_STAT_SIZE (sizeof(struct bbr_stats)/sizeof(uint64_t)) | |||||
extern counter_u64_t bbr_stat_arry[BBR_STAT_SIZE]; | |||||
#define BBR_STAT_ADD(name, amm) counter_u64_add(bbr_stat_arry[(offsetof(struct bbr_stats, name)/sizeof(uint64_t))], (amm)) | |||||
#define BBR_STAT_INC(name) BBR_STAT_ADD(name, 1) | |||||
#define BBR_OPTS_SIZE (sizeof(struct bbr_stats)/sizeof(uint64_t)) | |||||
extern counter_u64_t bbr_opts_arry[BBR_OPTS_SIZE]; | |||||
#define BBR_OPTS_ADD(name, amm) counter_u64_add(bbr_opts_arry[(offsetof(struct bbr_opts_stats, name)/sizeof(uint64_t))], (amm)) | |||||
#define BBR_OPTS_INC(name) BBR_OPTS_ADD(name, 1) | |||||
#endif | |||||
#define BBR_NUM_LOSS_RATES 3 | |||||
#define BBR_NUM_BW_RATES 3 | |||||
#define BBR_RECOVERY_LOWRTT 1 | |||||
#define BBR_RECOVERY_MEDRTT 2 | |||||
#define BBR_RECOVERY_HIGHRTT 3 | |||||
#define BBR_RECOVERY_EXTREMERTT 4 | |||||
struct bbr_control { | |||||
/*******************************/ | |||||
/* Cache line 2 from bbr start */ | |||||
/*******************************/ | |||||
struct bbr_head rc_map; /* List of all segments Lock(a) */ | |||||
struct bbr_head rc_tmap; /* List in transmit order Lock(a) */ | |||||
struct bbr_sendmap *rc_resend; /* something we have been asked to | |||||
* resend */ | |||||
uint32_t rc_last_delay_val; /* How much we expect to delay Lock(a) */ | |||||
uint32_t rc_bbr_hptsi_gain:16, /* Current hptsi gain Lock(a) */ | |||||
rc_hpts_flags:16; /* flags on whats on the pacer wheel */ | |||||
uint32_t rc_delivered; /* BRR delivered amount Lock(a) */ | |||||
uint32_t rc_hptsi_agg_delay; /* How much time are we behind */ | |||||
uint32_t rc_flight_at_input; | |||||
uint32_t rc_lost_bytes; /* Total bytes currently marked lost */ | |||||
/*******************************/ | |||||
/* Cache line 3 from bbr start */ | |||||
/*******************************/ | |||||
struct time_filter rc_delrate; | |||||
/*******************************/ | |||||
/* Cache line 4 from bbr start */ | |||||
/*******************************/ | |||||
struct bbr_head rc_free; /* List of Free map entries Lock(a) */ | |||||
struct bbr_sendmap *rc_tlp_send; /* something we have been | |||||
* asked to resend */ | |||||
uint32_t rc_del_time; | |||||
uint32_t rc_target_at_state; /* Target for a state */ | |||||
uint16_t rc_free_cnt; /* Number of free entries on the rc_free list | |||||
* Lock(a) */ | |||||
uint16_t rc_startup_pg; | |||||
uint32_t cur_rtt; /* Last RTT from ack */ | |||||
uint32_t rc_went_idle_time; /* Used for persits to see if its | |||||
* probe-rtt qualified */ | |||||
uint32_t rc_pace_max_segs:17, /* How much in any single TSO we send Lock(a) */ | |||||
rc_pace_min_segs:15; /* The minimum single segment size before we enter persists */ | |||||
uint32_t rc_rtt_shrinks; /* Time of last rtt shrinkage Lock(a) */ | |||||
uint32_t r_app_limited_until; | |||||
uint32_t rc_timer_exp; /* If a timer ticks of expiry */ | |||||
uint32_t rc_rcv_epoch_start; /* Start time of the Epoch Lock(a) */ | |||||
/*******************************/ | |||||
/* Cache line 5 from bbr start */ | |||||
/*******************************/ | |||||
uint32_t rc_lost_at_pktepoch; /* what the lost value was at the last | |||||
* pkt-epoch */ | |||||
uint32_t r_measurement_count; /* count of measurement applied lock(a) */ | |||||
uint32_t rc_last_tlp_seq; /* Last tlp sequence Lock(a) */ | |||||
uint16_t rc_reorder_shift; /* Socket option value Lock(a) */ | |||||
uint16_t rc_pkt_delay; /* Socket option value Lock(a) */ | |||||
struct bbr_sendmap *rc_sacklast; /* sack remembered place | |||||
* Lock(a) */ | |||||
struct bbr_sendmap *rc_next; /* remembered place where we next | |||||
* retransmit at Lock(a) */ | |||||
uint32_t rc_sacked; /* Tot sacked on scoreboard Lock(a) */ | |||||
uint32_t rc_holes_rxt; /* Tot retraned from scoreboard Lock(a) */ | |||||
uint32_t rc_reorder_ts; /* Last time we saw reordering Lock(a) */ | |||||
uint32_t rc_init_rwnd; /* Initial rwnd when we transitioned */ | |||||
/*- --- | |||||
* used only inital and close | |||||
*/ | |||||
uint32_t rc_high_rwnd; /* Highest rwnd seen */ | |||||
uint32_t rc_lowest_rtt; /* Smallest RTT we have seen */ | |||||
uint32_t rc_last_rtt; /* Last valid measured RTT that ack'd data */ | |||||
uint32_t bbr_cross_over; | |||||
/*******************************/ | |||||
/* Cache line 6 from bbr start */ | |||||
/*******************************/ | |||||
struct sack_filter bbr_sf; | |||||
/*******************************/ | |||||
/* Cache line 7 from bbr start */ | |||||
/*******************************/ | |||||
struct time_filter_small rc_rttprop; | |||||
uint32_t last_inbound_ts; /* Peers last timestamp */ | |||||
uint32_t rc_inc_tcp_oh: 1, | |||||
rc_inc_ip_oh: 1, | |||||
rc_inc_enet_oh:1, | |||||
rc_incr_tmrs:1, | |||||
restrict_growth:28; | |||||
uint32_t rc_lt_epoch_use; /* When we started lt-bw use Lock(a) */ | |||||
uint32_t rc_recovery_start; /* Time we start recovery Lock(a) */ | |||||
uint32_t rc_lt_del; /* Delivered at lt bw sampling start Lock(a) */ | |||||
uint64_t rc_bbr_cur_del_rate; /* Current measured delivery rate | |||||
* Lock(a) */ | |||||
/*******************************/ | |||||
/* Cache line 8 from bbr start */ | |||||
/*******************************/ | |||||
uint32_t rc_cwnd_on_ent; /* On entry to recovery the cwnd | |||||
* Lock(a) */ | |||||
uint32_t rc_agg_early; /* aggregate amount early */ | |||||
uint32_t rc_rcvtime; /* When we last received data Lock(a) */ | |||||
uint32_t rc_pkt_epoch_del; /* seq num that we need for RTT epoch */ | |||||
uint32_t rc_pkt_epoch; /* Epoch based on packet RTTs */ | |||||
uint32_t rc_pkt_epoch_time; /* Time we started the pkt epoch */ | |||||
uint32_t rc_pkt_epoch_rtt; /* RTT using the packet epoch */ | |||||
uint32_t rc_rtt_epoch; /* Current RTT epoch, it ticks every rttProp | |||||
* Lock(a) */ | |||||
uint32_t lowest_rtt; | |||||
uint32_t bbr_smallest_srtt_this_state; | |||||
uint32_t rc_lt_epoch; /* LT epoch start of bw_sampling */ | |||||
uint32_t rc_lost_at_startup; | |||||
uint32_t rc_bbr_state_atflight; | |||||
uint32_t rc_bbr_last_startup_epoch; /* Last startup epoch where we | |||||
* increased 20% */ | |||||
uint32_t rc_bbr_enters_probertt; /* Timestamp we entered | |||||
* probertt Lock(a) */ | |||||
uint32_t rc_lt_time; /* Time of lt sampling start Lock(a) */ | |||||
/*******************************/ | |||||
/* Cache line 9 from bbr start */ | |||||
/*******************************/ | |||||
uint64_t rc_lt_bw; /* LT bw calculated Lock(a) */ | |||||
uint64_t rc_bbr_lastbtlbw; /* For startup, what was last btlbw I | |||||
* saw to check the 20% gain Lock(a) */ | |||||
uint32_t rc_bbr_cwnd_gain; /* Current cwnd gain Lock(a) */ | |||||
uint32_t rc_pkt_epoch_loss_rate; /* pkt-epoch loss rate */ | |||||
uint32_t rc_saved_cwnd; /* Saved cwnd during Probe-rtt drain Lock(a) */ | |||||
uint32_t substate_pe; | |||||
uint32_t rc_lost; /* Number of bytes lost Lock(a) */ | |||||
uint32_t rc_exta_time_gd; /* How much extra time we got in d/g */ | |||||
uint32_t rc_lt_lost; /* Number of lt bytes lost at sampling start | |||||
* Lock(a) */ | |||||
uint32_t rc_bbr_state_time; | |||||
uint32_t rc_min_to; /* Socket option value Lock(a) */ | |||||
uint32_t rc_initial_hptsi_bw; /* Our initial startup bw Lock(a) */ | |||||
uint32_t bbr_lost_at_state; /* Temp counter debug lost value as we | |||||
* enter a state */ | |||||
/*******************************/ | |||||
/* Cache line 10 from bbr start */ | |||||
/*******************************/ | |||||
uint32_t rc_level_state_extra; | |||||
uint32_t rc_red_cwnd_pe; | |||||
const struct tcp_hwrate_limit_table *crte; | |||||
uint64_t red_bw; | |||||
uint32_t rc_probertt_int; | |||||
uint32_t rc_probertt_srttchktim; /* Time we last did a srtt | |||||
* check */ | |||||
uint32_t gain_epoch; /* Epoch we should be out of gain */ | |||||
uint32_t rc_min_rto_ms; | |||||
uint32_t rc_reorder_fade; /* Socket option value Lock(a) */ | |||||
uint32_t last_startup_measure; | |||||
int32_t bbr_hptsi_per_second; | |||||
int32_t bbr_hptsi_segments_delay_tar; | |||||
int32_t bbr_hptsi_segments_max; | |||||
uint32_t bbr_rttprobe_gain_val; | |||||
/*******************************/ | |||||
/* Cache line 11 from bbr start */ | |||||
/*******************************/ | |||||
uint32_t cur_rtt_send_time; /* Time we sent our rtt measured packet */ | |||||
uint32_t bbr_peer_tsratio; /* Our calculated ts ratio to multply */ | |||||
uint32_t bbr_ts_check_tstmp; /* When we filled it the TS that came on the ack */ | |||||
uint32_t bbr_ts_check_our_cts; /* When we filled it the cts of the send */ | |||||
uint32_t rc_tlp_rxt_last_time; | |||||
uint32_t bbr_smallest_srtt_state2; | |||||
uint32_t bbr_hdwr_cnt_noset_snt; /* count of hw pacing sends during delay */ | |||||
uint32_t startup_last_srtt; | |||||
uint32_t rc_ack_hdwr_delay; | |||||
uint32_t highest_hdwr_delay; /* Largest delay we have seen from hardware */ | |||||
uint32_t non_gain_extra; | |||||
uint32_t recovery_lr; /* The sum of the loss rate from the pe's during recovery */ | |||||
uint32_t last_in_probertt; | |||||
uint32_t flightsize_at_drain; /* In draining what was the last marked flight size */ | |||||
uint32_t rc_pe_of_prtt; /* PE we went into probe-rtt */ | |||||
uint32_t ts_in; /* ts that went with the last rtt */ | |||||
uint16_t rc_tlp_seg_send_cnt; /* Number of times we have TLP sent | |||||
* rc_last_tlp_seq Lock(a) */ | |||||
uint16_t rc_drain_pg; | |||||
uint32_t rc_num_maps_alloced; /* num send map entries allocated */ | |||||
uint32_t rc_num_split_allocs; /* num split map entries allocated */ | |||||
uint16_t rc_num_small_maps_alloced; /* Number of sack blocks | |||||
* allocated */ | |||||
uint16_t bbr_hptsi_bytes_min; | |||||
uint16_t bbr_hptsi_segments_floor; | |||||
uint16_t bbr_utter_max; | |||||
uint16_t bbr_google_discount; | |||||
}; | |||||
struct socket; | |||||
struct tcp_bbr { | |||||
/* First cache line 0x00 */ | |||||
int32_t(*r_substate) (struct mbuf *, struct tcphdr *, | |||||
struct socket *, struct tcpcb *, struct tcpopt *, | |||||
int32_t, int32_t, uint32_t, int32_t, int32_t); /* Lock(a) */ | |||||
struct tcpcb *rc_tp; /* The tcpcb Lock(a) */ | |||||
struct inpcb *rc_inp; /* The inpcb Lock(a) */ | |||||
struct timeval rc_tv; | |||||
uint32_t rc_pacer_started; /* Time we started the pacer */ | |||||
uint16_t no_pacing_until:8, /* No pacing until N packet epochs */ | |||||
ts_can_raise:1,/* TS b/w calculations can raise the bw higher */ | |||||
skip_gain:1, /* Skip the gain cycle (hardware pacing) */ | |||||
gain_is_limited:1, /* With hardware pacing we are limiting gain */ | |||||
output_error_seen:1, | |||||
oerror_cnt:4, | |||||
hw_pacing_set:1; /* long enough has passed for us to start pacing */ | |||||
uint16_t xxx_r_ack_count; /* During recovery count of ack's received | |||||
* that added data since output */ | |||||
uint16_t bbr_segs_rcvd; /* In Segment count since we sent a ack */ | |||||
uint8_t bbr_timer_src:4, /* Used for debugging Lock(a) */ | |||||
bbr_use_rack_cheat:1, /* Use the rack cheat */ | |||||
bbr_init_win_cheat:1, /* Send full IW for TSO */ | |||||
bbr_attempt_hdwr_pace:1,/* Try to do hardware pacing */ | |||||
bbr_hdrw_pacing:1; /* Hardware pacing is available */ | |||||
uint8_t bbr_hdw_pace_ena:1, /* Does the connection allow hardware pacing to be attempted */ | |||||
bbr_prev_in_rec:1, /* We were previously in recovery */ | |||||
pkt_conservation:1, | |||||
use_policer_detection:1, | |||||
xxx_bbr_hdw_pace_idx:4; /* If hardware pacing is on, index to slot in pace tbl */ | |||||
uint16_t r_wanted_output:1, | |||||
rtt_valid:1, | |||||
rc_timer_first:1, | |||||
rc_output_starts_timer:1, | |||||
rc_resends_use_tso:1, | |||||
rc_all_timers_stopped:1, | |||||
rc_loss_exit:1, | |||||
rc_ack_was_delayed:1, | |||||
rc_lt_is_sampling:1, | |||||
rc_filled_pipe:1, | |||||
rc_tlp_new_data:1, | |||||
rc_hit_state_1:1, | |||||
rc_ts_valid:1, | |||||
rc_prtt_set_ts:1, | |||||
rc_is_pkt_epoch_now:1, | |||||
rc_has_collapsed:1; | |||||
uint8_t r_state:4, /* Current bbr state Lock(a) */ | |||||
r_agg_early_set:1, /* Did we get called early */ | |||||
r_init_rtt:1, | |||||
r_use_policer:1, /* For google mode only */ | |||||
r_recovery_bw:1; | |||||
uint8_t r_timer_override:1, /* pacer override Lock(a) 0/1 */ | |||||
rc_in_persist:1, | |||||
rc_lt_use_bw:1, | |||||
rc_allow_data_af_clo:1, | |||||
rc_tlp_rtx_out:1, /* A TLP is in flight */ | |||||
rc_tlp_in_progress:1, /* a TLP timer is running needed? */ | |||||
rc_use_idle_restart:1; /* Do we restart fast after idle (persist or applim) */ | |||||
uint8_t rc_bbr_state:3, /* What is the major BBR state */ | |||||
rc_bbr_substate:3, /* For probeBW state */ | |||||
r_is_v6:1, | |||||
rc_past_init_win:1; | |||||
uint8_t rc_last_options; | |||||
uint8_t rc_tlp_threshold; /* Socket option value Lock(a) */ | |||||
uint8_t rc_max_rto_sec; | |||||
uint8_t rc_cwnd_limited:1, /* We are cwnd limited */ | |||||
rc_tmr_stopped:7; /* What timers have been stopped */ | |||||
uint8_t rc_use_google:1, | |||||
rc_use_ts_limit:1, | |||||
rc_ts_data_set:1, /* We have filled a set point to determine */ | |||||
rc_ts_clock_set:1, /* We have determined the ts type */ | |||||
rc_ts_cant_be_used:1, /* We determined we can't use ts values */ | |||||
rc_ack_is_cumack:1, | |||||
rc_no_pacing:1, | |||||
alloc_limit_reported:1; | |||||
uint8_t rc_init_win; | |||||
/* Cache line 2 0x40 */ | |||||
struct bbr_control r_ctl; | |||||
#ifdef _KERNEL | |||||
} __aligned(CACHE_LINE_SIZE); | |||||
#else | |||||
}; | |||||
#endif | |||||
#endif |