ROCm 6.4.3 release notes

ROCm 6.4.3 release notes#

2025-08-07

10 min read time

Applies to Linux

The release notes provide a summary of notable changes since the previous ROCm release.

Note

If you’re using AMD Radeon™ PRO or Radeon GPUs in a workstation setting with a display connected, see the Use ROCm on Radeon GPUs documentation to verify compatibility and system requirements.

Release highlights#

ROCm 6.4.3 is a quality release that resolves the following issues. For changes to individual components, see Detailed component changes.

AMDGPU driver updates#

  • Resolved an issue causing performance degradation in communication operations, caused by increased latency in certain RCCL applications. The fix prevents unnecessary queue eviction during the fork process.

  • Fixed an issue in the AMDGPU driver’s scheduler constraints that could cause queue preemption to fail during workload execution.

ROCm SMI update#

  • Fixed the failure to load GPU data like System Clock (SCLK) by adjusting the logic for retrieving GPU board voltage.

ROCm documentation updates#

ROCm documentation continues to be updated to provide clearer and more comprehensive guidance for a wider variety of user needs and use cases.

Operating system and hardware support changes#

Operating system and hardware support remain unchanged in this release.

See the Compatibility matrix for more information about operating system and hardware compatibility.

ROCm components#

The following table lists the versions of ROCm components for ROCm 6.4.3. Click to go to the component’s source code on GitHub.

Category Group Name Version
Libraries Machine learning and computer vision Composable Kernel 1.1.0
MIGraphX 2.12.0
MIOpen 3.4.0
MIVisionX 3.2.0
rocAL 2.2.0
rocDecode 0.10.0
rocJPEG 0.8.0
rocPyDecode 0.3.1
RPP 1.9.10
Communication RCCL 2.22.3
rocSHMEM 2.0.1
Math hipBLAS 2.4.0
hipBLASLt 0.12.1
hipFFT 1.0.18
hipfort 0.6.0
hipRAND 2.12.0
hipSOLVER 2.4.0
hipSPARSE 3.2.0
hipSPARSELt 0.2.3
rocALUTION 3.2.3
rocBLAS 4.4.1
rocFFT 1.0.32
rocRAND 3.3.0
rocSOLVER 3.28.2
rocSPARSE 3.4.0
rocWMMA 1.7.0
Tensile 4.43.0
Primitives hipCUB 3.4.0
hipTensor 1.5.0
rocPRIM 3.4.1
rocThrust 3.3.0
Tools System management AMD SMI 25.5.1
ROCm Data Center Tool 0.3.0
rocminfo 1.0.0
ROCm SMI 7.5.0 ⇒ 7.7.0
ROCm Validation Suite 1.1.0
Performance ROCm Bandwidth Test 1.4.0
ROCm Compute Profiler 3.1.1
ROCm Systems Profiler 1.0.2
ROCProfiler 2.0.0
ROCprofiler-SDK 0.6.0
ROCTracer 4.1.0
Development HIPIFY 19.0.0
ROCdbgapi 0.77.2
ROCm CMake 0.14.0
ROCm Debugger (ROCgdb) 15.2
ROCr Debug Agent 2.0.4
Compilers HIPCC 1.1.1
llvm-project 19.0.0
Runtimes HIP 6.4.3
ROCr Runtime 1.15.0

Detailed component changes#

The following sections describe key changes to ROCm components.

Note

For a historical overview of ROCm component updates, see the ROCm consolidated changelog.

ROCm SMI (7.7.0)#

Added#

  • Support for getting the GPU Board voltage.

Note

See the full ROCm SMI changelog for details, examples, and in-depth descriptions.

ROCm known issues#

ROCm known issues are noted on GitHub. For known issues related to individual components, review the Detailed component changes.

ROCm upcoming changes#

The following changes to the ROCm software stack are anticipated for future releases.

AMD SMI migration to AMDGPU driver repository#

In a future release, AMD SMI will be relocated from the ROCm organization repository to a new AMDTools repository to better align with its system-level functionality. amd-smi-lib will no longer be included in the rocm-developer-tools meta-package included with your standard ROCm installation. Instead, it will be packaged with the AMDGPU driver installation.

ROCm SMI deprecation#

ROCm SMI will be phased out in an upcoming ROCm release and will enter maintenance mode. After this transition, only critical bug fixes will be addressed and no further feature development will take place.

It’s strongly recommended to transition your projects to AMD SMI, the successor to ROCm SMI. AMD SMI includes all the features of the ROCm SMI and will continue to receive regular updates, new functionality, and ongoing support. For more information on AMD SMI, see the AMD SMI documentation.

ROCTracer, ROCProfiler, rocprof, and rocprofv2 deprecation#

Development and support for ROCTracer, ROCProfiler, rocprof, and rocprofv2 are being phased out in favor of ROCprofiler-SDK in upcoming ROCm releases. Starting with ROCm 6.4, only critical defect fixes will be addressed for older versions of the profiling tools and libraries. All users are encouraged to upgrade to the latest version of the ROCprofiler-SDK library and the (rocprofv3) tool to ensure continued support and access to new features. ROCprofiler-SDK is still in beta today and will be production-ready in a future ROCm release.

It’s anticipated that ROCTracer, ROCProfiler, rocprof, and rocprofv2 will reach end-of-life by future releases, aligning with Q1 of 2026.

AMDGPU wavefront size compiler macro deprecation#

Access to the wavefront size as a compile-time constant via the __AMDGCN_WAVEFRONT_SIZE and __AMDGCN_WAVEFRONT_SIZE__ macros or the constexpr warpSize variable is deprecated and will be disabled in a future release.

  • The __AMDGCN_WAVEFRONT_SIZE__ macro and __AMDGCN_WAVEFRONT_SIZE alias will be removed in an upcoming release. It is recommended to remove any use of this macro. For more information, see AMDGPU support.

  • warpSize will only be available as a non-constexpr variable. Where required, the wavefront size should be queried via the warpSize variable in device code, or via hipGetDeviceProperties in host code. Neither of these will result in a compile-time constant. For more information, see warpSize.

  • For cases where compile-time evaluation of the wavefront size cannot be avoided, uses of __AMDGCN_WAVEFRONT_SIZE, __AMDGCN_WAVEFRONT_SIZE__, or warpSize can be replaced with a user-defined macro or constexpr variable with the wavefront size(s) for the target hardware. For example:

   #if defined(__GFX9__)
   #define MY_MACRO_FOR_WAVEFRONT_SIZE 64
   #else
   #define MY_MACRO_FOR_WAVEFRONT_SIZE 32
   #endif

HIPCC Perl scripts deprecation#

The HIPCC Perl scripts (hipcc.pl and hipconfig.pl) will be removed in an upcoming release.

Changes to ROCm Object Tooling#

ROCm Object Tooling tools roc-obj-ls, roc-obj-extract, and roc-obj are deprecated in ROCm 6.4, and will be removed in a future release. Functionality has been added to the llvm-objdump --offloading tool option to extract all clang-offload-bundles into individual code objects found within the objects or executables passed as input. The llvm-objdump --offloading tool option also supports the --arch-name option, and only extracts code objects found with the specified target architecture. See llvm-objdump for more information.

HIP runtime API changes#

There are a number of upcoming changes planned for HIP runtime API in an upcoming major release that are not backward compatible with prior releases. Most of these changes increase alignment between HIP and CUDA APIs or behavior. Some of the upcoming changes are to clean up header files, remove namespace collision, and have a clear separation between hipRTC and HIP runtime. For more information, see HIP 7.0 Is Coming: What You Need to Know to Stay Ahead.