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Single program generally compiles kernels faster (2-3 times), loads faster,
takes less drive space (2-3 times), and reduces the number of cached kernels.
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Reduces memory allocation for split kernel.
This allows for faster rendering due to bigger global size,
specially when GPU memory is limited.
Perfromance results:
R9 290 total render time
Before After Change
BMW 4:37 4:34 -1.1 %
Classroom 14:43 14:30 -1.5 %
Fishy Cat 11:20 11:04 -2.4 %
Koro 12:11 12:04 -1.0 %
Pabellon Barcelona 22:01 20:44 -5.8 %
Pabellon Barcelona(*) 15:32 15:09 -2.5 %
(*) without glossy connected to volume
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This commit enables record-all transparent shadows rays.
Perfromance results:
R9 290 render time (without synchronization), seconds
Before After Change
BMW 261.5 262.5 +0.4 %
Classroom 869.6 867.3 -0.3 %
Fishy Cat 657.4 639.8 -2.7 %
Koro 1909.8 692.8 -63.7 %
Pabellon Barcelona 1633.3 1238.0 -24.2 %
Pabellon Barcelona(*) 1158.1 903.8 -22.0 %
(*) without glossy connected to volume
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Decoupled ray marching is not supported yet.
Transparent shadows are always enabled for volume rendering.
Changes in kernel/bvh and kernel/geom are from Sergey.
This simiplifies code significantly, and prepares it for
record-all transparent shadow function in split kernel.
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Needed to include `util_types.h` before using `uint`.
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AMD CPU platform was complaining about #line 0 directives in the code.
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initialization function
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This is all in split data state array.
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By calculating the size of the state buffer in the kernel rather than the host
less code is needed and the size actually reflects the requested features.
Will also be a little faster in some cases because of larger global work size.
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Pointers to kernels were uninitialized leading to freeing of random memory
addresses. Another reason it would be good to use smart pointers.
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Simple change to make it so that only kernels that have been modified are
rebuilt. Might only be useful during development.
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Because the split kernel can render multiple samples in parallel it is
necessary to have everything initialized before rendering of any samples
begins. The code that normally handles initialization of
`rng_state` (`kernel_path_trace_setup()`) only does so for the first sample,
which was causing artifacts in the split kernel due to uninitialized
`rng_state` for some samples.
Note that because the split kernel can render samples in parallel this
means that the split kernel is incompatible with the LCG.
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This was only needed for the previous implementation of parallel samples. As
we don't have that any more it can be removed.
Real reason for removal tho is this: `per_sample_output_buffers` was being
calculated too small and artifacts resulted. The tile buffer is already
the correct size and calculating the size for `per_sample_output_buffers`
is a bit difficult with the current layout of the code. As
`per_sample_output_buffers` was only needed for `sum_all_radiance`,
removing that kernel and writing output to the tile buffer directly
fixes the artifacts.
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This makes it easier to initialize things correctly in the data_init kernel
before they are needed by path tracing.
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This is to help debug and track memory usage for generic buffers. We
have similar for textures already since those require a name, but for
buffers the name is only for debugging proposes.
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Simple workaround for some issues we've been having with AMD drivers hanging
and rendering systems unresponsive. Unfortunately this makes things a bit
slower, but its better than having to do hard reboots. Will be removed when
drivers have been fixed.
Define CYCLES_DISABLE_DRIVER_WORKAROUNDS to disable for testing purposes.
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This does a few things at once:
- Refactors host side split kernel logic into a new device
agnostic class `DeviceSplitKernel`.
- Removes tile splitting, a new work pool implementation takes its place and
allows as many threads as will fit in memory regardless of tile size, which
can give performance gains.
- Refactors split state buffers into one buffer, as well as reduces the
number of arguments passed to kernels. Means there's less code to deal
with overall.
- Moves kernel logic out of OpenCL kernel files so they can later be used by
other device types.
- Replaced OpenCL specific APIs with new generic versions
- Tiles can now be seen updating during rendering
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Transferring memory to the device was very slow and there's really no
need when only zeroing a buffer.
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This is needed so devices can know the size of a tile buffer before any
tiles are acquired.
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This is useful for when theres no host side memory attched to the buffer
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Patch by Stefan Werner, thanks!
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Should be no functional changes.
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There was a bug in the intended code behaviour to always seek with a
pitch of 1.0 regardless of pitch/pitch animation/doppler effects.
Check the bug report for a more detailed explanation of problems
concerning pitch and seeking.
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Hopefully this was a reason of randomly disappearing textures in our renders.
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Patch by @swerner, thanks!
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Attributes were not resized after pushing new triangles to the mesh.
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= crash
Wrong formula was used to calculate needed verts and tris to be reserved.
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is used
The idea is to make it simpler to remove noise from scenes when some prop uses
Sharp glossy closure and causes noise in certain cases. Previously Sharp Glossy
was not affected by Filter Glossy at all, which was quite confusing.
Here is a file which demonstrates the issue: {F417797}
After applying the patch all the noise from the scene is gone.
This change also solves fireflies reported in T50700.
Reviewers: brecht, lukasstockner97
Differential Revision: https://developer.blender.org/D2416
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