LNG Foundational Review

Mike Holmes

LCE13 - Dublin, July 2013

LNG Engineering

● General - make connections○ Kim connected with Virtualization○ Gary conceded with Platform○ Guoqing connected to LNG testing○ Generally discussions were much more productive in

this our second face to face.○ Still have folks who need a core task

● Educate folks on our activities○ A robust debate questioning the need to run the

dataplane in userspace occurred. The meeting minutes note the strong use cases for requiring the RT patch set.

LNG Foundational

● General : Get new use cases○ Two uses cases were provided related to the

session, one supporting RT the other for a slow path back to the kernel from the dataplane.

● Resolve LNG Kernel tree○ We now have a clear map for the branches and

merging operations that are required to create the two LNG Trees moving forward. And how to support the out of step update nature of the RT variant.

○ 3.8 Tree had the final clean up

LNG Foundational

● Understand the work needed to be feature complete for LNG KVM - look at the future○ Very short term need for virtio-networking○ long term higher performing IO from the guest to

SoC HW○ Test KVM

● Understand the LAVA multinode○ Multi Node will not be ready in the needed time

frame○ Mitigation will be static IPs and hard wired test cases

to utilize the X86 traffic generators that are on order.

LNG Foundational

● NO_HZ_FULL○ Considered a great fit○ Needs to be enabled in LNG 3.10 kernel○ Need to apply patch to remove the 1 second tick○ Test

● Peempt_RT○ Apply rumored 3.10 RT patch○ Test

●

LNG Foundational

● Testing● Significant need to get more test cases built into the

rootfs and running in LAVA and utilize new analysis tools provided.

● Need improved LAVA support, possibly need LNG member in LAVA.

● RootFS○ Identified new test cases to be added○ Updated wiki with instructions on building LNG

rootFS

LNG Foundational