| Bug ID | 93264 |
|---|---|
| Summary | Tonga VM Faults since llvm ScheduleDAGInstrs: Rework schedule graph builder. |
| Product | DRI |
| Version | DRI git |
| Hardware | x86-64 (AMD64) |
| OS | Linux (All) |
| Status | NEW |
| Severity | normal |
| Priority | medium |
| Component | DRM/AMDgpu |
| Assignee | dri-devel@lists.freedesktop.org |
| Reporter | adf.lists@gmail.com |
R9285 using Unreal ElementalDemo to trigger this. It doesn't start till well into the demo at the same place that triggered an older resolved issue. https://bugs.freedesktop.org/show_bug.cgi?id=93015 (so maybe Nicolai knows what happens at this point in demo) bisecting llvm came up with c0a189c3792865257c1383f176e5401373ed2270 is the first bad commit commit c0a189c3792865257c1383f176e5401373ed2270 Author: Matthias Braun <matze@braunis.de> Date: Thu Dec 3 02:05:27 2015 +0000 ScheduleDAGInstrs: Rework schedule graph builder. The new algorithm remembers the uses encountered while walking backwards until a matching def is found. Contrary to the previous version this: - Works without LiveIntervals being available - Allows to increase the precision to subregisters/lanemasks (not used for now) The changes in the AMDGPU tests are necessary because the R600 scheduler is not stable with respect to the order of nodes in the ready queues. Differential Revision: http://reviews.llvm.org/D9068 The demo continues to run/render OK, but I get thousands of - amdgpu 0000:01:00.0: GPU fault detected: 147 0x07d04401 amdgpu 0000:01:00.0: VM_CONTEXT1_PROTECTION_FAULT_ADDR 0x092D80FA amdgpu 0000:01:00.0: VM_CONTEXT1_PROTECTION_FAULT_STATUS 0x0A044001 VM fault (0x01, vmid 5) at page 153977082, read from 'TC7' (0x54433700) (68) amdgpu 0000:01:00.0: GPU fault detected: 147 0x07d00401 amdgpu 0000:01:00.0: VM_CONTEXT1_PROTECTION_FAULT_ADDR 0x0022D16B amdgpu 0000:01:00.0: VM_CONTEXT1_PROTECTION_FAULT_STATUS 0x0A0C4002 VM fault (0x02, vmid 5) at page 2281835, read from 'TC4' (0x54433400) (196) amdgpu 0000:01:00.0: GPU fault detected: 147 0x07d04001 amdgpu 0000:01:00.0: VM_CONTEXT1_PROTECTION_FAULT_ADDR 0x0022D163
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