[ovs-dev] [PATCH v2 0/7] Rxq scheduling updates.

[Kevin Traynor]

A series to:
- cleanup rxq scheduling and auto load balance
- add some new rxq scheduling features

NOTE: asan is complaining in some unit tests, I need to investigate this:
https://github.com/kevintraynor/ovs/runs/2966525625?check_suite_focus=true#step:13:10256

General v2:
- added unit tests
- rework from comments
- much renaming and minor fixes
- reordered the patches and added 2 more

1/7 reworks the current rxq scheduling code to make it more modular
and reusable.
v2:
- renamed functions on David's suggestions
- used enum instead of bool for assignment type from the start
- fixed mem leak
- removed/simplified some redundant code

2/7 makes PMD auto load balance reuse the common rxq scheduling code
and removes the duplication of the rxq scheduling code in PMD auto load
balance for making a dry run.
v2: minor changes

3/7 new in v2. This is a small patch to make the pmd list used
for rxq scheduling ordered by core id. 

4/7 provides a fallback for if the user tries to pin an rxq to a PMD with
pmd-rxq-affinity but the PMD is not in the pmd-cpu-mask. Previously it was
not polled.
v2:
- removed some unneeded code by David's suggestion here and in 1/7 of not
  post-processing rxqs that have been already pinned

5/7 adds a new option to assign rxqs to pmds that incorporates the
estimated load of the PMD and removes the restriction for trying to
equally distribute the number of rxqs across the PMDs. This means it
is solely load based so will help optimize balancing the processing
load across the PMDs. With this method, a group of low loaded rxqs
may be on one PMD, while another PMD could have just one highly loaded
rxq.
v2:
- combined the lowest_* functions on Sunil's suggestion
- simplified some code
- added unit tests

6/7 adds an option to non-isolate the PMD when it is pinned with an rxq
using pmd-rxq-affinity.
- added unit tests

7/7 new in v2. There was no unit tests testing cross-numa assignments.
i.e. what happens when there is no numa local pmds for an rxq. Aside
from the new logs, these tests are relevant regardless of this patchset.

Kevin Traynor (7):
  dpif-netdev: Rework rxq scheduling code.
  dpif-netdev: Make PMD auto load balance use common rxq scheduling.
  dpif-netdev: Sort PMD list by core id for rxq scheduling.
  dpif-netdev: Assign PMD for failed pinned rxqs.
  dpif-netdev: Add group rxq scheduling assignment type.
  dpif-netdev: Allow pin rxq and non-isolate PMD.
  tests: Add new test for cross-numa pmd rxq assignments.

 Documentation/topics/dpdk/pmd.rst |   41 +-
 NEWS                              |    5 +
 lib/dpif-netdev.c                 | 1056 ++++++++++++++++++-----------
 tests/pmd.at                      |  285 +++++++-
 vswitchd/vswitch.xml              |   24 +-
 5 files changed, 994 insertions(+), 417 deletions(-)

-- 
2.31.1