ci: add worst-case stack usage report to RAM memory view

Add a puncover-based stack usage page (`ram_memory_view.html`) linked
from the RAM badge. Enables `CONFIG_STACK_USAGE` in `prj.conf` so
the build emits `.su` files for puncover to analyze.

The new `generate_ram_memory_view.py` script resolves Kconfig stack
entries to their thread entry points, runs puncover, and renders an
HTML table showing worst-case static stack depth vs. allocation.

`update_memory_badges.sh` now accepts the app ELF and build dir as
optional args and generates the stack report when available. Falls
back to the RAM sunburst if puncover fails.

Remove the `pr-size-diff.sh` script and its CI steps; the RAM badge
now links to the richer stack view instead.

Signed-off-by: Simen S. Røstad <simen.rostad@nordicsemi.no>

Author: simensrostad

.github/workflows/build.yml

@@ -161,18 +161,17 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
-          # Install required packages
-          pip install pandas plotly --break-system-packages
+          pip install pandas plotly puncover --break-system-packages
 
-          # Generate sunburst charts first
           python3 scripts/sunburst_from_mem_report.py ../artifacts/rom_report_thingy91x.json
           python3 scripts/sunburst_from_mem_report.py ../artifacts/ram_report_thingy91x.json
 
-          # Generate badges, history plots, and push everything to gh-pages
           ./tests/on_target/scripts/update_memory_badges.sh \
               ../artifacts/build_output_thingy91x.log \
               ../artifacts/rom_report_thingy91x.html \
-              ../artifacts/ram_report_thingy91x.html
+              ../artifacts/ram_report_thingy91x.html \
+              app/build/app/zephyr/zephyr.elf \
+              app/build/app
 
       - name: Build nrf9151dk firmware
         if: ${{ env.build_type == 'minimal' || env.build_type == 'release' || env.build_type == 'all' }}
@@ -256,25 +255,6 @@ jobs:
           version: ${{ env.VERSION }}-ext-gnss
           path: asset-tracker-template/app
 
-      - name: Generate PR app-size diff for thing91x image
-        if: github.event_name == 'pull_request'
-        env:
-          BASE_SHA: ${{ github.event.pull_request.base.sha }}
-          BOARD: thingy91x/nrf9151/ns
-          PR_HEAD_ELF: artifacts/asset-tracker-template-${{ env.VERSION }}-thingy91x-nrf91.elf
-          PR_HEAD_BUILD_LOG: artifacts/build_output_thingy91x.log
-          SIZE_COMMENT_PATH: ${{ github.workspace }}/size-comment.md
-          CI_RUN_URL: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}
-        run: |
-          bash asset-tracker-template/scripts/ci/pr-size-diff.sh
-
-      - name: Post PR app-size sticky comment for thingy91x image
-        if: github.event_name == 'pull_request'
-        uses: marocchino/sticky-pull-request-comment@0ea0beb66eb9baf113663a64ec522f60e49231c0 # v3.0.4
-        with:
-          header: app-size-report
-          path: ${{ github.workspace }}/size-comment.md
-
       - name: Upload artifacts
         uses: actions/upload-artifact@v4
         with:

README.md

@@ -6,7 +6,7 @@
 [![On-commit](https://img.shields.io/github/actions/workflow/status/nrfconnect/Asset-Tracker-Template/build-and-target-test.yml?event=push&branch=main&label=on-commit)](https://github.com/nrfconnect/Asset-Tracker-Template/actions/workflows/build-and-target-test.yml?query=branch%3Amain+event%3Apush)
 [![Nightly](https://img.shields.io/github/actions/workflow/status/nrfconnect/Asset-Tracker-Template/build-and-target-test.yml?event=schedule&branch=main&label=nightly)](https://github.com/nrfconnect/Asset-Tracker-Template/actions/workflows/build-and-target-test.yml?query=branch%3Amain+event%3Aschedule)
 [![PSM Current](https://img.shields.io/endpoint?url=https://nrfconnect.github.io/Asset-Tracker-Template/power_badge.json)](https://nrfconnect.github.io/Asset-Tracker-Template/power_measurements_plot.html)
-[![RAM Usage thingy91x](https://img.shields.io/endpoint?url=https://nrfconnect.github.io/Asset-Tracker-Template/ram_badge.json)](https://nrfconnect.github.io/Asset-Tracker-Template/ram_memory_view.html)
+[![RAM+stacks thingy91x](https://img.shields.io/endpoint?url=https://nrfconnect.github.io/Asset-Tracker-Template/ram_badge.json)](https://nrfconnect.github.io/Asset-Tracker-Template/ram_memory_view.html)
 [![FLASH Usage thingy91x](https://img.shields.io/endpoint?url=https://nrfconnect.github.io/Asset-Tracker-Template/flash_badge.json)](https://nrfconnect.github.io/Asset-Tracker-Template/flash_memory_view.html)
 
 ## Overview

app/prj.conf

@@ -6,6 +6,7 @@
 
 CONFIG_NCS_APPLICATION_BOOT_BANNER_STRING="Asset Tracker Template"
 CONFIG_NCS_SAMPLES_DEFAULTS=y
+CONFIG_STACK_USAGE=y
 CONFIG_RESET_ON_FATAL_ERROR=y
 CONFIG_LOG_MODE_DEFERRED=y
 CONFIG_LOG_BUFFER_SIZE=2048

docs/common/test_and_ci_setup.md

@@ -79,7 +79,7 @@ The documentation sync workflow ([.github/workflows/doc-sync.yml](https://github
 1. **Create documentation bundle**: Uses [create-doc-bundle.yml](https://github.com/nrfconnect/Asset-Tracker-Template/blob/main/.github/workflows/create-doc-bundle.yml) to package documentation for external publishing.
 2. **Publish documentation**: Uploads the documentation bundle to the prod and dev documentation hosting platforms.
 
-The `gh-pages` branch is kept in sync with main by the build workflow ([.github/workflows/build.yml](https://github.com/nrfconnect/Asset-Tracker-Template/blob/main/.github/workflows/build.yml)), which merges main into `gh-pages` before updating badge JSON files and interactive HTML reports (memory usage, power measurements) for the [GitHub Pages site](https://nrfconnect.github.io/Asset-Tracker-Template/).
+The `gh-pages` branch is updated by the nightly build workflow ([.github/workflows/build.yml](https://github.com/nrfconnect/Asset-Tracker-Template/blob/main/.github/workflows/build.yml)) with badge JSON files and interactive HTML reports (memory usage, worst-case stack usage via puncover, power measurements) for the [GitHub Pages site](https://nrfconnect.github.io/Asset-Tracker-Template/). The RAM badge links to `ram_memory_view.html`, a single page with the thread stack table (puncover) and the RAM sunburst chart side by side.
 
 ### Key Features