sleepy
6ad84d543c
3-model council (GLM-5.1, Minimax-M2.7, Kimi k2p5) analyzed Intel Arc GPU performance issues and produced patches for llama.cpp: Phase 1 - SYCL Sync: Enable graph execution by default (GGML_SYCL_DISABLE_GRAPH) Phase 2 - SYCL Kernel: Fix VER_GEN12/13 thresholds, tune DMMV_X/MMV_Y Phase 3 - Vulkan Intel: Arc 140T device-ID Xe2 override Includes: - Phased apply script (apply-phase.sh [1|2|3|all]) - Master apply script with --status/--reverse/--dry-run - Per-phase READMEs with testing checklists - Council deliberation logs (gitignored in logs/) Verified: all patches apply/reverse cleanly via git apply. Static verification: VER_GEN arithmetic and DMMV_X divisibility pass.
31 lines
1.0 KiB
Markdown
31 lines
1.0 KiB
Markdown
# Phase 3 — Vulkan Intel Fixes
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**Depends on:** Phase 1 and 2 (should be applied and tested first)
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## 0001-arc-140t-xe2-override.patch
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Adds device-ID override for Intel Arc 140T (Arrow Lake H) to force INTEL_XE2
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classification in the Vulkan backend.
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### Problem
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Arc 140T reports minSubgroupSize=8 instead of 16. The Vulkan backend uses
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minSubgroupSize to detect Xe2. When misreported, the 140T is classified as
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OTHER, disabling cooperative matrix and all dependent optimizations.
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### Fix
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Checks for Arrow Lake H device IDs (0x7D51, 0x7D45) before the minSubgroupSize
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check and returns INTEL_XE2 directly.
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### Applies to
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Both the EXT and KHR code paths in ggml-vulkan.cpp.
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### Impact
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Only affects Arrow Lake H (Arc 140T) systems. No effect on other hardware.
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### Testing checklist
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- [ ] Build succeeds with Vulkan support
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- [ ] Arc 140T: device classified as INTEL_XE2
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- [ ] Arc 140T: cooperative matrix shaders used for matmul
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- [ ] Other Intel GPUs: no change in behavior
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- [ ] Non-Intel GPUs: no change in behavior
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