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11 Commits

Author SHA1 Message Date
Maxim Mikityanskiy
b8b8b6d4c9 tc/htb: Hierarchical QoS hardware offload 
This commit adds support for configuring HTB in offload mode. HTB
offload eliminates the single qdisc lock in the datapath and offloads
the algorithm to the NIC. The new 'offload' parameter is added to
enable this mode:

    # tc qdisc replace dev eth0 root handle 1: htb offload

Classes are created as usual, but filters should be moved to clsact for
lock-free classification (filters attached to HTB itself are not
supported in the offload mode):

    # tc filter add dev eth0 egress protocol ip flower dst_port 80
    action skbedit priority 1:10

tc qdisc show and tc class show will indicate whether the offload is
enabled. Example output:

$ tc qdisc show dev eth1
qdisc htb 1: root offloaded r2q 10 default 0 direct_packets_stat 0 direct_qlen 1000 offload
qdisc pfifo 0: parent 1: limit 1000p
qdisc pfifo 0: parent 1: limit 1000p
qdisc pfifo 0: parent 1: limit 1000p
qdisc pfifo 0: parent 1: limit 1000p
qdisc pfifo 0: parent 1: limit 1000p
qdisc pfifo 0: parent 1: limit 1000p
qdisc pfifo 0: parent 1: limit 1000p
qdisc pfifo 0: parent 1: limit 1000p
$ tc class show dev eth1
class htb 1:101 parent 1:1 prio 0 rate 4Gbit ceil 4Gbit burst 1000b cburst 1000b  offload
class htb 1:1 root rate 100Gbit ceil 100Gbit burst 0b cburst 0b  offload
class htb 1:103 parent 1:1 prio 0 rate 4Gbit ceil 4Gbit burst 1000b cburst 1000b  offload
class htb 1:102 parent 1:1 prio 0 rate 4Gbit ceil 4Gbit burst 1000b cburst 1000b  offload
class htb 1:105 parent 1:1 prio 0 rate 4Gbit ceil 4Gbit burst 1000b cburst 1000b  offload
class htb 1:104 parent 1:1 prio 0 rate 4Gbit ceil 4Gbit burst 1000b cburst 1000b  offload
class htb 1:107 parent 1:1 prio 0 rate 4Gbit ceil 4Gbit burst 1000b cburst 1000b  offload
class htb 1:106 parent 1:1 prio 0 rate 4Gbit ceil 4Gbit burst 1000b cburst 1000b  offload
class htb 1:108 parent 1:1 prio 0 rate 4Gbit ceil 4Gbit burst 1000b cburst 1000b  offload
$ tc -j qdisc show dev eth1
[{"kind":"htb","handle":"1:","root":true,"offloaded":true,"options":{"r2q":10,"default":"0","direct_packets_stat":0,"direct_qlen":1000,"offload":null}},{"kind":"pfifo","handle":"0:","parent":"1:","options":{"limit":1000}},{"kind":"pfifo","handle":"0:","parent":"1:","options":{"limit":1000}},{"kind":"pfifo","handle":"0:","parent":"1:","options":{"limit":1000}},{"kind":"pfifo","handle":"0:","parent":"1:","options":{"limit":1000}},{"kind":"pfifo","handle":"0:","parent":"1:","options":{"limit":1000}},{"kind":"pfifo","handle":"0:","parent":"1:","options":{"limit":1000}},{"kind":"pfifo","handle":"0:","parent":"1:","options":{"limit":1000}},{"kind":"pfifo","handle":"0:","parent":"1:","options":{"limit":1000}}]

Signed-off-by: Maxim Mikityanskiy <maximmi@mellanox.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: David Ahern <dsahern@kernel.org>
 2021-02-04 21:54:13 -07:00
Benjamin Lee
fe821d64e6 man: tc-htb.8: fix class prio is not mandatory 
Fix description for htb class prio parameter to indicate it's not
mandatory.

Signed-off-by: Benjamin Lee <ben@b1c1l1.com>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
 2020-04-13 14:04:00 -07:00
Benjamin Lee
6ecd0198c0 man: tc-htb.8: add missing class parameter quantum 
Add description for htb class parameter quantum.

Signed-off-by: Benjamin Lee <ben@b1c1l1.com>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
 2020-04-13 14:04:00 -07:00
Benjamin Lee
d8d59421b6 man: tc-htb.8: add missing qdisc parameter r2q 
Add description for htb qdisc parameter r2q.

Signed-off-by: Benjamin Lee <ben@b1c1l1.com>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
 2020-04-13 14:04:00 -07:00
Stephen Hemminger
5699275b42 man8: scrub trailing whitespace 
Remove extraneous whitespace
 2015-11-23 15:41:37 -08:00
Vadim Kochan
6c19ff10b5 man tc-htb: Fix HRB -> HTB typo 
Changed HRB -> HTB.

Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
 2015-09-23 16:16:14 -07:00
Alexander Wirt
b096fa5f3b Fix various typos and nitpicks 
Fix typo in ss manpage.
Make the backslash visible in ip manpage (http://bugs.debian.org/285507).
Strict syntax for ip addr advice in error message.
Fix typo in libnetlink(3) manpage (writen -> written).
Fix typos in tc-prio(8) manpage.
Fix typo in tc-htb(8) manpage (mininum -> minimum).
Fix typo in tc-cbq-details(8) manpage (occured -> occurred).

Signed-off-by: Andreas Henriksson <andreas@fatal.se>
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
 2007-10-17 09:56:11 -07:00
Stephen Hemminger
59cc4f73f2 Revert "Remove bogus reference to tc-filters(8) from tc(8) manpage." 
This reverts commit 1bacc7ce75.
 2007-10-12 15:44:07 -07:00
Andreas Barth
1bacc7ce75 Remove bogus reference to tc-filters(8) from tc(8) manpage. 
Spotted by Aleš Kozumplík <al_es@seznam.cz>
(http://bugs.debian.org/289225)

Signed-off-by: Andreas Henriksson <andreas@fatal.se>
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
 2007-10-12 14:55:42 -07:00
osdl.org!shemminger
985794ad38 (Logical change 1.13) 2004-06-08 20:34:17 +00:00
osdl.org!shemminger
c90e297870 Initial revision 2004-06-08 20:34:17 +00:00