leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
0a9fe5c375
linux/net/sched
History
Yousuk Seung 0a9fe5c375 netem: slotting with non-uniform distribution 
Extend slotting with support for non-uniform distributions. This is
similar to netem's non-uniform distribution delay feature.

Commit f043efeae2f1 ("netem: support delivering packets in delayed
time slots") added the slotting feature to approximate the behaviors
of media with packet aggregation but only supported a uniform
distribution for delays between transmission attempts. Tests with TCP
BBR with emulated wifi links with non-uniform distributions produced
more useful results.

Syntax:
   slot dist DISTRIBUTION DELAY JITTER [packets MAX_PACKETS] \
      [bytes MAX_BYTES]

The syntax and use of the distribution table is the same as in the
non-uniform distribution delay feature. A file DISTRIBUTION must be
present in TC_LIB_DIR (e.g. /usr/lib/tc) containing numbers scaled by
NETEM_DIST_SCALE. A random value x is selected from the table and it
takes DELAY + ( x * JITTER ) as delay. Correlation between values is not
supported.

Examples:
  Normal distribution delay with mean = 800us and stdev = 100us.
  > tc qdisc add dev eth0 root netem slot dist normal 800us 100us

  Optionally set the max slot size in bytes and/or packets.
  > tc qdisc add dev eth0 root netem slot dist normal 800us 100us \
    bytes 64k packets 42

Signed-off-by: Yousuk Seung <ysseung@google.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-28 22:06:24 +09:00
..
act_api.c net: sched: don't disable bh when accessing action idr 2018-05-22 15:34:34 -04:00
act_bpf.c net/sched: fix NULL dereference in the error path of tcf_bpf_init() 2018-04-05 22:26:06 -04:00
act_connmark.c net: Drop pernet_operations::async 2018-03-27 13:18:09 -04:00
act_csum.c net sched: Implemented get_fill_size routine for act_csum. 2018-05-03 11:15:58 -04:00
act_gact.c net: Drop pernet_operations::async 2018-03-27 13:18:09 -04:00
act_ife.c net/sched: act_ife: preserve the action control in case of error 2018-06-20 09:03:58 +09:00
act_ipt.c net: Drop pernet_operations::async 2018-03-27 13:18:09 -04:00
act_meta_mark.c net: remove duplicate includes 2017-12-13 13:18:46 -05:00
act_meta_skbprio.c net sched actions: change IFE modules alias names 2017-10-12 22:13:20 -07:00
act_meta_skbtcindex.c net: remove duplicate includes 2017-12-13 13:18:46 -05:00
act_mirred.c net: Drop pernet_operations::async 2018-03-27 13:18:09 -04:00
act_nat.c net: Drop pernet_operations::async 2018-03-27 13:18:09 -04:00
act_pedit.c net: Drop pernet_operations::async 2018-03-27 13:18:09 -04:00
act_police.c net: Drop pernet_operations::async 2018-03-27 13:18:09 -04:00
act_sample.c net: Drop pernet_operations::async 2018-03-27 13:18:09 -04:00
act_simple.c net/sched: act_simple: fix parsing of TCA_DEF_DATA 2018-06-08 18:49:19 -04:00
act_skbedit.c net sched actions: fix invalid pointer dereferencing if skbedit flags missing 2018-05-11 15:52:43 -04:00
act_skbmod.c net sched actions: fix refcnt leak in skbmod 2018-05-11 16:37:03 -04:00
act_tunnel_key.c net: Drop pernet_operations::async 2018-03-27 13:18:09 -04:00
act_vlan.c net/sched: fix refcnt leak in the error path of tcf_vlan_init() 2018-05-16 14:41:44 -04:00
cls_api.c net: sched: call reoffload op on block callback reg 2018-06-26 23:21:33 +09:00
cls_basic.c net_sched: switch to rcu_work 2018-05-24 22:56:15 -04:00
cls_bpf.c net: sched: cls_bpf: implement offload tcf_proto_op 2018-06-26 23:21:33 +09:00
cls_cgroup.c net_sched: switch to rcu_work 2018-05-24 22:56:15 -04:00
cls_flow.c net_sched: switch to rcu_work 2018-05-24 22:56:15 -04:00
cls_flower.c net: sched: cls_flower: implement offload tcf_proto_op 2018-06-26 23:21:32 +09:00
cls_fw.c net_sched: switch to rcu_work 2018-05-24 22:56:15 -04:00
cls_matchall.c net: sched: cls_matchall: implement offload tcf_proto_op 2018-06-26 23:21:33 +09:00
cls_route.c net_sched: switch to rcu_work 2018-05-24 22:56:15 -04:00
cls_rsvp6.c
cls_rsvp.c
cls_rsvp.h net_sched: switch to rcu_work 2018-05-24 22:56:15 -04:00
cls_tcindex.c net_sched: switch to rcu_work 2018-05-24 22:56:15 -04:00
cls_u32.c net: sched: cls_u32: implement offload tcf_proto_op 2018-06-26 23:21:33 +09:00
em_canid.c
em_cmp.c
em_ipset.c netfilter: x_tables: move hook state into xt_action_param structure 2016-11-03 10:56:21 +01:00
em_ipt.c net: sched: add em_ipt ematch for calling xtables matches 2018-02-21 13:15:33 -05:00
em_meta.c net: convert sock.sk_refcnt from atomic_t to refcount_t 2017-07-01 07:39:08 -07:00
em_nbyte.c net: sched: em_nbyte: don't add the data offset twice 2018-01-24 14:52:40 -05:00
em_text.c
em_u32.c
ematch.c net: sched: ematch: obtain net pointer from blocks 2017-10-16 21:00:40 +01:00
Kconfig net: sched: add em_ipt ematch for calling xtables matches 2018-02-21 13:15:33 -05:00
Makefile net: sched: add em_ipt ematch for calling xtables matches 2018-02-21 13:15:33 -05:00
sch_api.c proc: introduce proc_create_single{,_data} 2018-05-16 07:23:35 +02:00
sch_atm.c net: sch: api: add extack support in qdisc_create_dflt 2017-12-21 12:32:51 -05:00
sch_blackhole.c net_sched: blackhole: tell upper qdisc about dropped packets 2018-06-17 08:42:33 +09:00
sch_cbq.c net: sch: sch_cbq: add extack support 2017-12-21 12:32:51 -05:00
sch_cbs.c net: sch: sch_cbs: add extack support 2017-12-21 12:32:51 -05:00
sch_choke.c net: sched: sch: add extack for change qdisc ops 2017-12-21 12:32:50 -05:00
sch_codel.c net: sched: sch: add extack for change qdisc ops 2017-12-21 12:32:50 -05:00
sch_drr.c net: sch: sch_drr: add extack support 2017-12-21 12:32:51 -05:00
sch_dsmark.c net: sch: api: add extack support in qdisc_create_dflt 2017-12-21 12:32:51 -05:00
sch_fifo.c net: sch: api: add extack support in qdisc_create_dflt 2017-12-21 12:32:51 -05:00
sch_fq_codel.c treewide: kvzalloc() -> kvcalloc() 2018-06-12 16:19:22 -07:00
sch_fq.c net_sched: fq: take care of throttled flows before reuse 2018-05-02 16:37:38 -04:00
sch_generic.c net: remove bypassed check in sch_direct_xmit() 2018-05-31 13:26:19 -04:00
sch_gred.c net: sched: sch: add extack for change qdisc ops 2017-12-21 12:32:50 -05:00
sch_hfsc.c net_sched: remove a bogus warning in hfsc 2018-06-23 10:58:46 +09:00
sch_hhf.c treewide: kvzalloc() -> kvcalloc() 2018-06-12 16:19:22 -07:00
sch_htb.c net_sched: remove unused htb drop_list 2018-06-24 16:42:46 +09:00
sch_ingress.c net: sched: allow ingress and clsact qdiscs to share filter blocks 2018-01-17 14:53:57 -05:00
sch_mq.c net: sched: mq: request stats from offloads 2018-05-29 09:49:16 -04:00
sch_mqprio.c net: sch: api: add extack support in qdisc_create_dflt 2017-12-21 12:32:51 -05:00
sch_multiq.c net: sch: api: add extack support in qdisc_create_dflt 2017-12-21 12:32:51 -05:00
sch_netem.c netem: slotting with non-uniform distribution 2018-06-28 22:06:24 +09:00
sch_pie.c net: sched: sch: add extack for change qdisc ops 2017-12-21 12:32:50 -05:00
sch_plug.c net: sched: sch: add extack for change qdisc ops 2017-12-21 12:32:50 -05:00
sch_prio.c net: sch: prio: Add offload ability for grafting a child 2018-02-28 12:06:01 -05:00
sch_qfq.c net: sch: api: add extack support in qdisc_create_dflt 2017-12-21 12:32:51 -05:00
sch_red.c net: sched: red: avoid hashing NULL child 2018-05-18 13:52:32 -04:00
sch_sfb.c net: sch: api: add extack support in qdisc_create_dflt 2017-12-21 12:32:51 -05:00
sch_sfq.c net: sch: api: add extack support in tcf_block_get 2017-12-21 12:32:51 -05:00
sch_tbf.c net: sched: red: avoid hashing NULL child 2018-05-18 13:52:32 -04:00
sch_teql.c net: sched: sch: add extack for init callback 2017-12-21 12:32:50 -05:00