[DPDK/DTS Bug 1577] dts: Request for memory usage test in CI

[DPDK/DTS Bug 1577] dts: Request for memory usage test in CI

[bugzilla]

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https://bugs.dpdk.org/show_bug.cgi?id=1577

            Bug ID: 1577
           Summary: dts: Request for memory usage test in CI
           Product: DPDK
           Version: unspecified
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: DTS
          Assignee: dev@dpdk.org
          Reporter: probb@iol.unh.edu
                CC: juraj.linkes@pantheon.tech, probb@iol.unh.edu
  Target Milestone: ---

On 11/13/24 Tech board discussed the idea of tracking hugepage memory usage for
EAL bringup and basic DPDK workloads for per patch CI testing. Ideally UNH
could track a baseline for each DPDK tree, and then for per patch testing
compare the baseline for the tree a patch is applied on with the memory usage
test result for that patch. 

Testcases would be:

1. Start testpmd (EAL starts) and check memory usage.
2. Start some basic l2/l3 forwarding and check memory usage during.
3. (possible) Create flow rules for a device, check memory usage.
4. etc.

Prereqs to adding this test:

1. Add a runtime command to testpmd which will return hugepage memory usage.

Other notes: 

1. UNH would need to track tree memory usage for each device/driver, as we can
expect usage will not be consistent across devices. In principle it is similar
to how UNH stores performance baselines for NIC/tree combinations right now, so
no DB schema updates should be required.

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