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[Bug 1776160] [NEW] 'burst' does not take effect for neutron egress qos bindlimit by ovs

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: sunzuohua <zuohuasun@xxxxxxxxx>
Date: Mon, 11 Jun 2018 07:08:30 -0000
Reply-to: Bug 1776160 <1776160@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

Public bug reported:

1. openstack version: newton(same with master)
2. neutron --version 11.0.1
3. ovs-vsctl (Open vSwitch) 2.7.2
4. iperf3

The ovs config is as follow:
[root@cdpm04 common]# ovs-vsctl list qos
_uuid               : b90a11e9-ea70-4908-8cb2-bab21e117312
external_ids        : {id="qvocd3421e0-43"}
other_config        : {max-rate="3000000"}
queues              : {0=22ba7a96-328c-4876-b7ac-b35d77ce3a09}
type                : linux-htb
[root@cdpm04 common]# ovs-vsctl list queue
_uuid               : 22ba7a96-328c-4876-b7ac-b35d77ce3a09
dscp                : []
external_ids        : {id="qvocd3421e0-43", queue_type="0"}
other_config        : {burst="300000", max-rate="3000000"}

The burst does not take effect.Even I change the value of burst, the result does not change.
The result is as follows:

[ ID] Interval           Transfer     Bandwidth       Retr
[  5]   0.00-11.27  sec  4.50 MBytes  3.35 Mbits/sec    0             sender
[  5]   0.00-11.27  sec  3.87 MBytes  2.88 Mbits/sec                  receiver

I think this problem is related to [1][2].
Maybe we do not have to change like that.I revert the code and the result is accurate.

[1]https://bugs.launchpad.net/neutron/+bug/1730605
[2]https://review.openstack.org/519573

** Affects: neutron
     Importance: Undecided
         Status: New


** Tags: qos

** Tags added: qos

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https://bugs.launchpad.net/bugs/1776160

Title:
  'burst' does not take effect for neutron egress  qos bindlimit by ovs

Status in neutron:
  New

Bug description:
  1. openstack version: newton(same with master)
  2. neutron --version 11.0.1
  3. ovs-vsctl (Open vSwitch) 2.7.2
  4. iperf3

  The ovs config is as follow:
  [root@cdpm04 common]# ovs-vsctl list qos
  _uuid               : b90a11e9-ea70-4908-8cb2-bab21e117312
  external_ids        : {id="qvocd3421e0-43"}
  other_config        : {max-rate="3000000"}
  queues              : {0=22ba7a96-328c-4876-b7ac-b35d77ce3a09}
  type                : linux-htb
  [root@cdpm04 common]# ovs-vsctl list queue
  _uuid               : 22ba7a96-328c-4876-b7ac-b35d77ce3a09
  dscp                : []
  external_ids        : {id="qvocd3421e0-43", queue_type="0"}
  other_config        : {burst="300000", max-rate="3000000"}

  The burst does not take effect.Even I change the value of burst, the result does not change.
  The result is as follows:

  [ ID] Interval           Transfer     Bandwidth       Retr
  [  5]   0.00-11.27  sec  4.50 MBytes  3.35 Mbits/sec    0             sender
  [  5]   0.00-11.27  sec  3.87 MBytes  2.88 Mbits/sec                  receiver

  I think this problem is related to [1][2].
  Maybe we do not have to change like that.I revert the code and the result is accurate.

  [1]https://bugs.launchpad.net/neutron/+bug/1730605
  [2]https://review.openstack.org/519573

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