The request-response performance on Vhost interface is low
Bug #1372262 reported by
Divakar Dharanalakota
This bug affects 1 person
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| Juniper Openstack |
Fix Committed
|
Undecided
|
Divakar Dharanalakota | ||
Bug Description
Due to Link local feature changes on Vhost interface, the erequest response performance has come down drastically. This needs to be improved.
| tags: | added: vrouter |
| Changed in juniperopenstack: | |
| assignee: | nobody → Divakar Dharanalakota (ddivakar) |
| information type: | Proprietary → Public |
Revision history for this message
| Divakar Dharanalakota (ddivakar) wrote | #1 |
Revision history for this message
| OpenContrail Admin (ci-admin-f) wrote A change has been merged | #2 |
| Changed in juniperopenstack: | |
| status: | New → Fix Committed |
Revision history for this message
| OpenContrail Admin (ci-admin-f) wrote | #3 |
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The link local service is achieved by adding a flow entry on Vhost interface. When a non link local packet is received on Fabric interfaces, these packets hit Receive NH with relaxed policy and end up in flow lookup. As there is no flow entry available for these packets, flow look up fails. As every packet has a flow miss, performance is drastically down when over flow table is searched which is a linear search.
To avoid this, every time, a new link local flow is added, Vrouter caches the ports corresponding to these flows in different DB. When a packet hits Reeive NH with relaxed policy, this DB is searched before doing flow lookup.
With this performance increased from 3k request/responses per sec to 16k.
-Divakar