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Get Started Free →nvidia/doca-spcx-cc
Use this skill when the user is invoking `doca_spcx_cc` (the host-side CLI under /opt/mellanox/doca/tools/) to load, parameterize, start, observe, or stop a Programmable Congestion Control (SPCX) algorithm on a BlueField with a DPA processor against a live RDMA / RoCE fabric, or picking SPCX vs the established `doca-pcc` surface. Trigger even when the user does not say "DOCA SPCX" or "doca_spcx_cc" — typical implicit phrasings include "I want to write a custom RTT-based CC algorithm for my RoCE
Passed 18 of 20 test cases with the skill, and 6 of 20 without it.
and 20 more in the full report
13 fixed7 passed either way2 still failing0 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 11 test cases the skill fixed. Same model, same prompt, with and without the skill.
What is the lightweight, read-only first step tool to verify whether PCC activity is occurring on a BlueField network port before running an SPCX evaluation?
| Checked | Without skill | With skill |
|---|---|---|
| Identifies doca-pcc-counters as the read-only counter inspection tool for checking initial port activity. | Missed | Passed |
The instructions your model reads when the skill loads.
Where to start: This is a tool skill for invoking
doca_spcx_cc — the documented host-side CLI that exercises
an SPCX-class Programmable Congestion Control algorithm on a
live RDMA / RoCE fabric driven by a BlueField with a DPA
processor. Open TASKS.md and start at
## configure for the
SPCX-vs-PCC-vs-factory-firmware decision tree (load-bearing
gate before any code), the role decision (RP / NP), the
DPA-side algorithm authoring vs consumption split, and the
live-link / contention precondition. Open
CAPABILITIES.md when the question is
what does SPCX let me express that doca-pcc does not,
what is the SPCX-vs-PCC tradeoff, what runtime metrics
does the tool surface, or what is the safety posture for
loading a custom CC algorithm on a production fabric. If
DOCA is not installed yet, route to
doca-setup first.
This skill is the next-gen programmable-CC surface.
doca-pcc is the established
PCC story; SPCX is the documented extension that authors
SPCX-class algorithms on the same DPA hardware substrate.
doca-pcc-ztr-rttcc-algo
is one shipped reference algorithm (zero-touch RTT-based
CC) that can be loaded through either the PCC or SPCX path
depending on the install and the user's algorithm choice;
the agent surfaces this decision tree explicitly per
CAPABILITIES.md ## Capabilities and modes.
The CLASSES of doca_spcx_cc questions this skill is built
to answer, each with one worked example. The class is the
load-bearing piece; the worked example is one instance.
doca-pcc for my custom CC
algorithm?" — worked example: *"I want to write a new
RTT-based congestion-control algorithm for my RoCEtest cases passed, vs 6 / 20 without
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