This option is added to avoid the flooding of nb_cfg updates from
a large nubmer of hypervisors interfere with the original SB DB
data distribution and handling, so that the e2e control plane latency
can be measured more accurately during scale testing.
Signed-off-by: Han Zhou <hz...@ovn.org>
---
controller/ovn-controller.8.xml | 12 ++++++++++++
controller/ovn-controller.c | 9 +++++++++
2 files changed, 21 insertions(+)
diff --git a/controller/ovn-controller.8.xml b/controller/ovn-controller.8.xml
index 6687731..4cb3f41 100644
--- a/controller/ovn-controller.8.xml
+++ b/controller/ovn-controller.8.xml
@@ -233,6 +233,18 @@
The boolean flag indicates if the chassis is used as an
interconnection gateway.
</dd>
+
+ <dt><code>external_ids:ovn-delay-nb-cfg-report</code></dt>
+ <dd>
+ An integer that represents the time (in seconds) to sleep before
+ <code>ovn-controller</code> updating <code>nb_cfg</code> column
+ of <code>Chassis_Private</code> table after it completes processing
+ the corresponding changes. By default it is 0 (meaning do not sleep).
+ This value can be configured when doing control plane latency testing,
+ to make sure the updates of <code>nb_cfg</code> to the Southbound DB
+ from a large number of hypervisors do not interfere with the original
+ Southbound DB data processing.
+ </dd>
</dl>
<p>
diff --git a/controller/ovn-controller.c b/controller/ovn-controller.c
index 89f10a6..5ab5a13 100644
--- a/controller/ovn-controller.c
+++ b/controller/ovn-controller.c
@@ -2568,6 +2568,15 @@ main(int argc, char *argv[])
sbrec_chassis_private_set_nb_cfg(chassis_private, cur_cfg);
sbrec_chassis_private_set_nb_cfg_timestamp(
chassis_private, time_wall_msec());
+ const struct ovsrec_open_vswitch *cfg =
+ ovsrec_open_vswitch_first(ovs_idl_loop.idl);
+ if (cfg) {
+ int delay_cfg_report = smap_get_int(&cfg->external_ids,
+ "ovn-delay-nb-cfg-report", 0);
+ if (delay_cfg_report) {
+ xsleep(delay_cfg_report);
+ }
+ }
}
}
--
2.1.0
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