Juniper Openstack

DPDK: Vrouter performance drops as no of cores allocated increases

Bug #1508580 reported by Vinod Nair on 2015-10-21

This bug affects 1 person

	Status	Importance	Assigned to	Milestone
Juniper Openstack	Status tracked in Trunk
R3.0	Fix Released	Critical	Vinod Nair	Juniper Openstack r3.0.3.0
R3.0.2.x	Fix Released	Critical	Raja Sivaramakrishnan	Juniper Openstack r3.0.2.1
R3.1	Fix Released	Critical	Raja Sivaramakrishnan	Juniper Openstack r3.1.1.0
Trunk	Fix Released	Critical	Raja Sivaramakrishnan	Juniper Openstack r3.2.0.0-fcs "r3.2.0.0"

With No of cores allocated to dpdk increases, the pkt forwarding / handling rate decreases.

Initially had 4 cores allocated to dpdk (coremask 0xf). Was able to see UDP unidirectional PPS of approx ~3M PPS

Changed the no of cores to 16 0xff000000ff)

The PPS dropped to 700K PPS

Version: Ubuntu 14.04 3.0-2655~juno

Tags:

Vinod Nair (vinodnair) on 2015-10-21

Changed in juniperopenstack:
importance:	Undecided → Critical
milestone:	none → r3.0-fcs
no longer affects:	juniperopenstack/r3.0
no longer affects:	juniperopenstack/r3.0

Jeba Paulaiyan (jebap) on 2016-05-04

information type:

Proprietary → Public

Revision history for this message

Raja Sivaramakrishnan (raja-u) wrote on 2016-09-21:

Vinod, I think this is fixed by 1505472. Can you please close if you agree? Thanks.

Revision history for this message

Vinod Nair (vinodnair) wrote on 2016-09-22:

yep This is fixed by the commit above ..
The max pps varies depends on if the vrouter is on the same numa as the nic or not

Vrouter on same numa as nic and vm also on same numa = max pps is 7.4 Mpps (3.7 Tx and 3.7 Rx)

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