Comment # 11
on bug 107518
from Luigi Laurini
Same bug present in amd64 architecture under kvm guest with RX 480 passed through. The first time i boot the guest the performance are ok, but if i reboot the guest without rebooting the host, the messages appears. Tried the patch https://cgit.freedesktop.org/~agd5f/linux/commit/?h=amd-staging-drm-next&id=8242308cc3c4419832126ab78ca409ce7110ab33 The message are gone but the performance problem is still present. the problem affects the memory/gpu clocking: First boot of the guest: cat /sys/kernel/debug/dri/0/amdgpu_pm_info Clock Gating Flags Mask: 0x37bcf Graphics Medium Grain Clock Gating: On Graphics Medium Grain memory Light Sleep: On Graphics Coarse Grain Clock Gating: On Graphics Coarse Grain memory Light Sleep: On Graphics Coarse Grain Tree Shader Clock Gating: Off Graphics Coarse Grain Tree Shader Light Sleep: Off Graphics Command Processor Light Sleep: On Graphics Run List Controller Light Sleep: On Graphics 3D Coarse Grain Clock Gating: Off Graphics 3D Coarse Grain memory Light Sleep: Off Memory Controller Light Sleep: On Memory Controller Medium Grain Clock Gating: On System Direct Memory Access Light Sleep: Off System Direct Memory Access Medium Grain Clock Gating: On Bus Interface Medium Grain Clock Gating: Off Bus Interface Light Sleep: On Unified Video Decoder Medium Grain Clock Gating: On Video Compression Engine Medium Grain Clock Gating: On Host Data Path Light Sleep: Off Host Data Path Medium Grain Clock Gating: On Digital Right Management Medium Grain Clock Gating: Off Digital Right Management Light Sleep: Off Rom Medium Grain Clock Gating: On Data Fabric Medium Grain Clock Gating: Off GFX Clocks and Power: 1750 MHz (MCLK) 330 MHz (SCLK) 300 MHz (PSTATE_SCLK) 300 MHz (PSTATE_MCLK) 1000 mV (VDDGFX) 19.127 W (average GPU) GPU Temperature: 56 C GPU Load: 0 % UVD: Disabled VCE: Disabled if i reboot the guest: cat /sys/kernel/debug/dri/0/amdgpu_pm_info Clock Gating Flags Mask: 0x37bcf Graphics Medium Grain Clock Gating: On Graphics Medium Grain memory Light Sleep: On Graphics Coarse Grain Clock Gating: On Graphics Coarse Grain memory Light Sleep: On Graphics Coarse Grain Tree Shader Clock Gating: Off Graphics Coarse Grain Tree Shader Light Sleep: Off Graphics Command Processor Light Sleep: On Graphics Run List Controller Light Sleep: On Graphics 3D Coarse Grain Clock Gating: Off Graphics 3D Coarse Grain memory Light Sleep: Off Memory Controller Light Sleep: On Memory Controller Medium Grain Clock Gating: On System Direct Memory Access Light Sleep: Off System Direct Memory Access Medium Grain Clock Gating: On Bus Interface Medium Grain Clock Gating: Off Bus Interface Light Sleep: On Unified Video Decoder Medium Grain Clock Gating: On Video Compression Engine Medium Grain Clock Gating: On Host Data Path Light Sleep: Off Host Data Path Medium Grain Clock Gating: On Digital Right Management Medium Grain Clock Gating: Off Digital Right Management Light Sleep: Off Rom Medium Grain Clock Gating: On Data Fabric Medium Grain Clock Gating: Off GFX Clocks and Power: 300 MHz (MCLK) 300 MHz (SCLK) 300 MHz (PSTATE_SCLK) 300 MHz (PSTATE_MCLK) 800 mV (VDDGFX) 7.162 W (average GPU) GPU Temperature: 42 C GPU Load: 0 % UVD: Disabled VCE: Disabled
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