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EXP_PanVK-kbase-rg556-lab86 vs panvk_faux123_rg556_v0.13.0

On Mali-G57 (Anbernic RG556, Redmi A5, TECNO KL4). The first driver named is compared against the second, which is the baseline.

Stockpanvk_faux123_rg556_v0.13.0Mesa 26.3.0-devel (git-48835cc38d)
vs
CustomEXP_PanVK-kbase-rg556-lab86PanVK-kbase RC3-lowmem (Mesa 26.3.0-devel (git-a6db27309d))
Graphics system version (Vulkan)1.3.354 to 1.3.363
Optional features (extensions)166 to 175+12 -3
Features that pass their check (validated)49 to 523 pass only on EXP_PanVK-kbase-rg556-lab86 0 pass only on panvk_faux123_rg556_v0.13.0
Speed test scenes (benchmark)4 faster 0 slower 1 even27% faster overall (geometric mean)
Games each driver could run (an estimate from its feature list): green likely, yellow maybe, orange limited, red no
StockDX92002+DX102006+DX112009+DX122015+Switch
CustomDX92002+DX102006+DX112009+DX122015+Switch
  • compute_nbody0% faster
  • hdr_2160p136% faster
  • oit_linked_lists3% faster
  • pipeline_barriers25% faster
  • subpasses7% faster

Custom driver against stock, per scene. Bars to the right are faster, to the left slower.

Small areas of the picture differ from the stock driver in 1 scene (pipeline_barriers: 1597 of 2304 cells). The picture matches overall, so this is a local rendering fault, not a different scene.

panvk_faux123_rg556_v0.13.0 details EXP_PanVK-kbase-rg556-lab86 details

Feature checks that differ (6)

Featurepanvk_faux123_rg556_v0.13.0EXP_PanVK-kbase-rg556-lab86Change
robustImageAccess2
VK_EXT_robustness2
unsupportedpassgained
compat.helper_loop_terminator
core
untestedpassgained
compat.nested_map
core
untestedpassgained
extendedDynamicState2PatchControlPoints
VK_EXT_extended_dynamic_state2
unsupporteduntestedchanged
depthBounds
VkPhysicalDeviceFeatures
unsupporteduntestedchanged
shaderTessellationAndGeometryPointSize
VkPhysicalDeviceFeatures
untestedunsupportedchanged

Speed test scenes (benchmark)

Scenepanvk_faux123_rg556_v0.13.0 msEXP_PanVK-kbase-rg556-lab86 msDifferenceStartsGPU clock, MHzPicture vs stock
compute_nbody30.51 typical 30.2630.40 typical 30.110% faster3 of 3 vs 3 of 3? vs ? clock unknownno large difference 0.0 no small difference worst 0.0 64x36
hdr_2160p532.18 typical 523.53225.08 typical 221.59136% faster? vs 3 of 3? vs ? clock unknownnot checked
oit_linked_lists154.71 typical 153.46149.95 typical 148.173% faster3 of 3 vs 3 of 3? vs ? clock unknownno large difference 0.0 no small difference worst 0.0 64x36
pipeline_barriers34.75 typical 7.1427.73 typical 8.0325% faster3 of 3 vs 3 of 3? vs ? clock unknownno large difference 8.7 differs in 1597 small areas worst 82.0 64x36
subpasses55.25 typical 93.4351.87 typical 5.877% faster3 of 3 vs 3 of 3? vs ? clock unknownnot checked

Time to draw one frame, per scene: the average (mean) frame time of the scene's best round, which is how many frames the driver delivered; lower is faster. "Typical" beside it is the median frame, which can sit well under the average when a driver's frames come in two speeds. A pair of reports made before per-round averages were recorded is compared on the median. A scene whose rounds disagree by more than 15% is left out. A scene marked "paced" was held at that mean frame time by the driver or the display queue, together with at least one other scene of the same run; its time says how the frames were spaced, not how fast the driver rendered, so it is not compared. A scene marked "too light" took under 8 ms at the standard size (1920 by 1080) on both drivers, where the screen's frame queue spaces the frames more than the chip does; its heavier run is the one compared: the row ending in _2160p is the scene drawn at 3840 by 2160, and compute_nbody_2x is that scene with twice the particles. "Faster" and "slower" describe EXP_PanVK-kbase-rg556-lab86 against panvk_faux123_rg556_v0.13.0. "Picture vs stock" compares one fixed frame per scene as a coarse colour grid (0 is identical, above 40 is a different picture); it finds a scene that was not drawn. Where both reports carry the finer 64x36 grid, the second figure is how many of its 2,304 cells differ by more than 4 of 255, and "worst" is the largest single cell; this is what finds a small rendering error in a picture that otherwise matches. A row marked 16x9 comes from a report made before the finer grid existed. "Starts" is how many of a scene's process starts reached a measured round. A GPU clock marked "not comparable" differed by more than 5% of the device's maximum between the two timings.

Technical differences (Vulkan)

Extensions only in EXP_PanVK-kbase-rg556-lab86 (12)
  • VK_EXT_conditional_rendering
  • VK_EXT_image_compression_control
  • VK_EXT_present_timing
  • VK_EXT_primitives_generated_query
  • VK_EXT_swapchain_maintenance1
  • VK_KHR_present_id
  • VK_KHR_present_id2
  • VK_KHR_present_wait
  • VK_KHR_present_wait2
  • VK_KHR_shader_constant_data
  • VK_KHR_swapchain_maintenance1
  • VK_KHR_swapchain_mutable_format
Extensions only in panvk_faux123_rg556_v0.13.0 (3)
  • VK_KHR_depth_clamp_zero_one
  • VK_KHR_pipeline_binary
  • VK_KHR_robustness2
Core features that differ (1)
shaderOutputViewportIndex Vulkan 1.2unsupported to pass
Limits that differ (7)
Limitpanvk_faux123_rg556_v0.13.0EXP_PanVK-kbase-rg556-lab86
sparseAddressSpaceSize0140737454800896
maxGeometryShaderInvocations3264
maxGeometryInputComponents12864
maxGeometryOutputVertices1024256
minStorageBufferOffsetAlignment164
timestampComputeAndGraphics01
timestampPeriod038.4615
Formats supported by only one driver (0 gained, 0 lost)

Only in EXP_PanVK-kbase-rg556-lab86:

  • None

Only in panvk_faux123_rg556_v0.13.0:

  • None