Hi, Jiong,

To follow up the iovisor meeting discussion, the below is my prototype
for an end_loop
instruction in llvm:
https://github.com/yonghong-song/llvm/commit/b83226772100317092cae6478229ed6ca3b9903c
The goal is to help verifier to just focus on these marked cases,
rejecting any other backedges.

Please let me and John know if you get some better idea for bounded
loop support in llvm/verifier.

Thanks,

Yonghong

On Wed, Apr 3, 2019 at 11:49 AM Brenden Blanco <bblanco@...> wrote:

Hi All,

Thanks for the good discussion today! Below are my notes.

Thanks,
Brenden

=== Discussion ===

[...]

Yonghong:
* Compile once run anywhere work continues
  * bitfield handling bugs in IR/debuginfo

Daniel:
* Global support work continues
  * BTF side patches submitted to bpf mailing list
  * tests included

Jiong:
* 32 bit patch set
  * test methodology improvements
  * updated patches later in the week
  * some concerns around shifts, to be addressed in later improvements

Andrii:
* BTF and compile-once work integration
  to share prototype tool with Saeed

Brendan:
* Is there a tool to measure queue latency in qdisc->netdev layer?
  * debian/ubuntu are packaging bpftrace
  * except libbcc renamed to libbpf_cc
  * some issues with mixing iovisor's libbcc and debian's

Jesper:
* Fedora adding packaging support for libbpf

Alexei:
* systemd also adding support for libbpf - link to be provided?

=== Attendees ===
Brenden Blanco
Andril Nakryiko
Daniel Borkmann
Jesper Brouer
Jiong Wang
Marco Leogrande
Michael Savisko
Paul Chaignon
Quentin Monnet
Alexei Starovoitov
Saeed
Flavio
Rony
Jonathan Lemon
Brendan Gregg
Dan Siemon
Joe Stringer
John