Repository: ggml-org/llama.cpp
Pull request: CI: add hip quality check

Add "hip-check" ci workflow, this workflow is intended to solve the following problems for us:

1. The hip backend has had repeated problems with people adding #pragma unroll loops that cant be unrolled see ssm-conv, softmax and https://github.com/ggml-org/llama.cpp/pull/20128#discussion_r2898155552
    * this workflow builds the hip backend with Werror to make it obvious when these occure
    * i did not make the hip builds Werror generally as we can not guarentee that there will be no warnings when built against every rocm version we support
2. Currently we want to support rocm >=6.1 so build for 6.1 in the build workflow to check that no functions from newer rocm sneak in, however we build the release against the latest version of rocm, this causes the issue that we dont notice if a pr dosent build against the latest version until the release fails
    * This workflow builds against the same version of rocm as the release to check for this
4. GCN/CDNA have a rather small 64 KiB vector register file and are wave 64, which means that only 256 registers are available. Quite often kernels get added that include significant register spill.
   * This pr adds a small script that is used in the workflow to check for kernels that spill significant registers
   * The script ignores kernels with significant spills currently in the code base (altho several of these should be investigated at some point)

The idea of this workflow that its failure NOT necessarily block a pr, but that its should prompt investigation / possible adding to the workflows witelist.

Changed files:
filename: .github/workflows/hip-quality-check.yml
patch: @@ -0,0 +1,80 @@
+name: HIP quality check
+
+on:
+  workflow_dispatch: # allows manual triggering
+  push:
+    branches:
+      - master
+    paths: [
+      '.github/workflows/hip-quality-check.yml',
+      '**/*.cu',
+      '**/*.cuh'
+    ]
+
+  pull_request:
+    types: [opened, synchronize, reopened]
+    paths: [
+      '.github/workflows/hip-quality-check.yml',
+      '**/*.cu',
+      '**/*.cuh'
+    ]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref && github.ref || github.run_id }}
+  cancel-in-progress: true
+
+env:
+  GGML_NLOOP: 3
+  GGML_N_THREADS: 1
+  LLAMA_LOG_COLORS: 1
+  LLAMA_LOG_PREFIX: 1
+  LLAMA_LOG_TIMESTAMPS: 1
+
+jobs:
+  ubuntu-22-hip-quality-check:
+    runs-on: ubuntu-22.04
+    container: rocm/dev-ubuntu-22.04:7.2
+    steps:
+      - name: Clone
+        id: checkout
+        uses: actions/checkout@v6
+
+      - name: Dependencies
+        id: depends
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y build-essential git cmake rocblas-dev hipblas-dev libssl-dev python3
+
+      - name: ccache
+        uses: ggml-org/ccache-action@v1.2.21
+        with:
+          key: ubuntu-22-hip-quality-check
+          evict-old-files: 1d
+          save: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
+
+      - name: Build with Werror
+        id: cmake_build
+        run: |
+          cmake -B build -S . \
+            -DCMAKE_HIP_COMPILER="$(hipconfig -l)/clang" \
+            -DGPU_TARGETS=gfx908 \
+            -DGGML_HIP=ON \
+            -DGGML_HIP_EXPORT_METRICS=Off \
+            -DCMAKE_HIP_FLAGS="-Werror -Wno-tautological-compare" \
+            -DCMAKE_BUILD_TYPE=Release
+          cd build
+          make -j $(nproc)
+
+      - name: Check for major VGPR spills
+        id: vgpr_check
+        run: |
+          cmake -B build -S . \
+            -DCMAKE_HIP_COMPILER="$(hipconfig -l)/clang" \
+            -DGPU_TARGETS=gfx908 \
+            -DGGML_HIP=ON \
+            -DGGML_HIP_EXPORT_METRICS=On \
+            -DCMAKE_HIP_FLAGS="" \
+            -DCMAKE_BUILD_TYPE=Release
+          cd build
+          make -j $(nproc) 2>&1 | tee metrics.log | grep -v 'Rpass-analysis=kernel-resource-usage\|remark:\|^$'
+          python3 ../scripts/hip/gcn-cdna-vgpr-check.py metrics.log

filename: ggml/src/ggml-hip/CMakeLists.txt
patch: @@ -53,9 +53,6 @@ endif()
 
 message(STATUS "HIP and hipBLAS found")
 
-# Workaround old compilers
-set(CMAKE_HIP_FLAGS "${CMAKE_HIP_FLAGS} --gpu-max-threads-per-block=1024")
-
 file(GLOB   GGML_HEADERS_ROCM "../ggml-cuda/*.cuh")
 list(APPEND GGML_HEADERS_ROCM "../../include/ggml-cuda.h")
 

filename: scripts/hip/gcn-cdna-vgpr-check.py
patch: @@ -0,0 +1,157 @@
+#!/usr/bin/env python3
+
+import sys
+from collections import defaultdict
+
+
+def parse_log_file(filepath):
+    """Parse log file and extract function VGPR usage."""
+    import re
+
+    functions = defaultdict(lambda: {'vgprs': 0, 'spill': 0, 'location': ''})
+
+    try:
+        with open(filepath, 'r') as f:
+            content = f.read()
+            # Find all function entries with VGPR usage including location
+            pattern = r'([^:]+:\d+):.*?Function Name: (\S+).*?VGPRs: (\d+).*?VGPRs Spill: (\d+)'
+            matches = re.findall(pattern, content, re.DOTALL)
+
+            for location, func_name, vgprs, spill in matches:
+                functions[func_name]['vgprs'] = int(vgprs)
+                functions[func_name]['spill'] = int(spill)
+                # Extract just the filename and line number
+                parts = location.split('/')
+                if len(parts) > 0:
+                    short_location = parts[-1]  # Get last part (filename)
+                    # Check if there's a line number after filename
+                    if ':' in short_location:
+                        functions[func_name]['location'] = short_location
+                    else:
+                        functions[func_name]['location'] = location
+                else:
+                    functions[func_name]['location'] = location
+    except FileNotFoundError:
+        print(f"Error: File {filepath} not found", file=sys.stderr) # noqa: NP100
+        sys.exit(1)
+
+    return functions
+
+
+def main():
+    if len(sys.argv) < 2:
+        print("Usage: ./vgpr_check.py <log_file>", file=sys.stderr) # noqa: NP100
+        sys.exit(1)
+
+    log_file = sys.argv[1]
+    ignored = {
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+        '_ZL18flash_attn_ext_f16ILi128ELi128ELi32ELi2ELb1ELb0EEvPKcS1_S1_S1_S1_PKiPfP15HIP_vector_typeIfLj2EEffffjfiS5_IjLj3EEiiiiiiiiiiiliiliiiiil',
+        '_ZL18flash_attn_ext_f16ILi128ELi128ELi4ELi8ELb1ELb0EEvPKcS1_S1_S1_S1_PKiPfP15HIP_vector_typeIfLj2EEffffjfiS5_IjLj3EEiiiiiiiiiiiliiliiiiil',
+        '_ZL18flash_attn_ext_f16ILi96ELi96ELi4ELi8ELb0ELb0EEvPKcS1_S1_S1_S1_PKiPfP15HIP_vector_typeIfLj2EEffffjfiS5_IjLj3EEiiiiiiiiiiiliiliiiiil',
+    }
+
+    functions = parse_log_file(log_file)
+    found_issues = False
+
+    # First print all ignored functions (deduplicated)
+    printed_ignored = set()
+    for func_name, data in sorted(functions.items()):
+        total_vgprs = int(data['vgprs']) + int(data['spill'])
+        if total_vgprs > 256 and func_name in ignored and func_name not in printed_ignored:
+            location = data.get('location', log_file)
+            print(f"{location}: {func_name} - Total VGPRs: {total_vgprs} ({data['vgprs']} + {data['spill']}) [IGNORED]") # noqa: NP100
+            printed_ignored.add(func_name)
+
+    # Then print new functions with issues in red
+    for func_name, data in sorted(functions.items()):
+        total_vgprs = int(data['vgprs']) + int(data['spill'])
+        if total_vgprs > 256 and func_name not in ignored:
+            status = "[IGNORED]" if func_name in ignored else ""
+            location = data.get('location', log_file)
+            # Print in red if not ignored
+            color_code = "\033[91m" if func_name not in ignored else ""
+            reset_code = "\033[0m" if func_name not in ignored else ""
+            print(f"{color_code}{location}: {func_name} - Total VGPRs: {total_vgprs} ({data['vgprs']} + {data['spill']}) {status}{reset_code}") # noqa: NP100
+            if func_name not in ignored:
+                found_issues = True
+
+    sys.exit(1 if found_issues else 0)
+
+
+if __name__ == "__main__":
+    main()