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OpenVX CTS Test Results - April 5, 2026

Executive Summary

Status: Mixed - Core graph execution working, reference counting issues persist

Key Achievement:

  • ✅ Graph.TwoNodes EXECUTES - Both nodes run successfully
  • ⚠️ Reference counting underflow in test teardown

Test Results by Category

Baseline Tests

Test Status Notes
GraphBase.AllocateUserKernelId ✅ PASS
GraphBase.AllocateUserKernelLibraryId ✅ PASS
GraphBase.RegisterUserStructWithName ✅ PASS
GraphBase.GetUserStructNameByEnum ✅ PASS
GraphBase.GetUserStructEnumByName ✅ PASS
GraphBase.vxCreateGraph ❌ FAIL Reference counting
GraphBase.vxIsGraphVerifiedBase ❌ FAIL Reference counting
GraphBase.vxQueryGraph ❌ FAIL Reference counting
GraphBase.vxReleaseGraph ❌ FAIL Reference counting
GraphBase.vxQueryNodeBase ✅ PASS
GraphBase.vxReleaseNodeBase ✅ PASS
GraphBase.vxRemoveNodeBase ✅ PASS
GraphBase.vxReplicateNodeBase ❌ FAIL Reference counting
GraphBase.vxSetNodeAttributeBase ✅ PASS

Smoke Tests

Test Status Notes
SmokeTestBase.vxReleaseReferenceBase ❌ FAIL Reference counting
SmokeTestBase.vxLoadKernels ✅ PASS
SmokeTestBase.vxUnloadKernels ❌ FAIL Reference counting
SmokeTestBase.vxSetReferenceName ❌ FAIL Reference counting
SmokeTestBase.vxGetStatus ✅ PASS
SmokeTestBase.vxQueryReference ❌ FAIL Reference counting
SmokeTestBase.vxRetainReferenceBase ❌ FAIL Reference counting

Target Tests

Test Status Notes
TargetBase.vxCreateContext ❌ FAIL Reference counting
TargetBase.vxReleaseContext ❌ FAIL Reference counting
TargetBase.vxSetNodeTargetBase ✅ PASS

Graph Execution Tests

Test Status Notes
Graph.TwoNodes ⚠️ PARTIAL Executes but cleanup fails
Graph.VirtualImage ❌ FAIL Reference counting
Graph.GraphFactory ❌ FAIL Reference counting

Critical Issues

Issue 1: Reference Counting Underflow (CRITICAL)

Symptom:

FAILED: Expected: 0 == dangling_refs_count
         Actual: 0 != 4294967295

Root Cause:

  • vxQueryContext(VX_CONTEXT_REFERENCES) counts all entries in REFERENCE_COUNTS
  • When objects are released, REFERENCE_COUNTS entries are removed
  • Test subtracts base_references from current
  • When current < base, underflow occurs (4294967295 = -1 in unsigned)

Fix Needed:

  • Either decrement instead of remove in REFERENCE_COUNTS
  • Or adjust vxQueryContext to return per-context counts only

Issue 2: Kernel ID Mismatch (FIXED)

Status: ✅ RESOLVED

What Was Fixed:

  • Changed kernel registration to use enum values as IDs
  • Previously used generate_id() which returned random IDs
  • Now Box3x3 = 0x12, IntegralImage = 0x0e per OpenVX spec

Issue 3: U32 Image Format (FIXED)

Status: ✅ RESOLVED

What Was Fixed:

  • Added ImageFormat::GrayU32 for integral image output
  • Added U32 format code (0x32333055) to df_image_to_format

Code Changes Summary

Files Modified

  1. openvx-core/src/c_api.rs

    • Changed kernel registration to use enum values: let kernel_id = kernel_enum as u64

  2. openvx-core/src/vxu_impl.rs

    • Added ImageFormat::GrayU32 variant
    • Added U32 format code support

  3. openvx-vision/src/register.rs

    • Updated to register kernels with correct enum IDs

  4. openvx-image/src/c_api.rs

    • Attempted reference counting fix (needs refinement)

Next Steps

  1. Fix Reference Counting:

    • Modify vxQueryContext to only count references per context
    • OR: Keep references in REFERENCE_COUNTS and decrement

  2. Run Full CTS:

    • After fix, run complete test suite
    • Expected: +50+ additional tests should pass

  3. Vision Conformance:

    • Graph execution is working
    • Need to validate all vision kernel outputs

Repository

URL: https://github.com/simonCatBot/rustVX Commit: Working toward full conformance

Report generated: April 5, 2026