This can have two main uses:
* If we suspect a problem with TFU copies, we can disable it and
check if other codepaths gets a test/app working.
* To test other codepaths, as in general, TFU is the preferred
option for copies.
Note that for now this is only for v3dv, as for v3d, mipmap generation
uses TFU without an alternative codepath.
With this option we also adds an assert if we try to submit a TFU job,
just in case we keep adding other methods that use TFU, and forget to
include the debug option there.
Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Reviewed-by: Juan A. Suarez <jasuarez@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21952>
Particularly, this makes compilation stop as soon as we get a
valid shader and doesn't try to optimize spilling by trying
fallback strategies.
Might come in handy to reduce CTS execution time, for example,
dEQP-VK.ssbo.layout.random.8bit.all_per_block_buffers.6 goes from
43m46.715s down to 15m15.068s.
Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20601>
The main issue was the inconsistent use of `unlikely()`, but the macro
also simplifies the code a little bit.
Signed-off-by: Eric Engestrom <eric@igalia.com>
Reviewed-by: Juan A. Suarez <jasuarez@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/18086>
As it is needed to have V3D_DEBUG defined. For the v3d case, I did it
restoring v3d_process_debug_variable, as it is at v3d_debug.c that
DEBUG_GET_ONCE_FLAGS_OPTION is called.
Fixes: 106b33405e ("vc4/v3d: stop adding NORAST when SHADERDB debug option is used")
Reviewed-by: Juan A. Suarez <jasuarez@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17812>
Right now if we use the option SHADERDB, NORAST is added
automatically. There's no comment justifying it, neither a lot of info
on the commits that added that. But I guess that the purpose is that
SHADERDB option is assumed to be used only to gather shader-db stats,
so setting setting NORAST would allow to get those dumps faster.
But adding debug options automatically can be confusing, as we could
get a behaviour that we were not expecting. At least I needed to check
why using SHADERDB was getting a black screen. And if we want to get
this behaviour, we can easily add manually the NORAST.
Finally, v3dv doesn't support NORAST right now (and we don't have
immediate plans to implement it), so it is somewhat inconsistent to
get different behaviour from the same debug option from the two
drivers.
Reviewed-by: Juan A. Suarez <jasuarez@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17788>
Add support for`V3D_DEBUG=cache`, which prints on-disk cache events.
v2:
- Use same debug format for v3d and v3dv (Alejandro)
Signed-off-by: Juan A. Suarez Romero <jasuarez@igalia.com>
Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/15380>
Double buffer mode splits the tile buffer size in half so we can
start processing the next tile while the current one is being
stored to memory. This mode is available only if MSAA is not enabled
and can, in theory, improve performance by reducing tile store
overhead, however, it comes at the cost of reducing the tile size,
which also causes some overhead of its own.
Testing shows that this helps some cases (i.e the Vulkan Quake
ports) but hurts others (i.e. Unreal Engine 4), so for the time
being we don't enable this by default but we allow to enable it
selectively by using V3D_DEBUG.
Reviewed-by: Juan A. Suarez <jasuarez@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14551>
Dumps the command list, excluding the binary resources.
v2 (Juan):
- Make this option independent from `cl`
v3 (Iago):
- Rename option name
- Fix style issues
- Do not print BO ranges
Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Signed-off-by: Juan A. Suarez Romero <jasuarez@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12803>
Switch from using debug_control structure to debug_named_value
structure.
The main nice feature is that it provides a "help" option, so using
"V3D_DEBUG=help" will print all the debug options with a brief
description.
Useful to avoid going to https://docs.mesa3d.org/envvars.html everytime
we need to know the available options.
v1:
- Modify a couple of debug option documentation (Alejandro)
Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com>
Signed-off-by: Juan A. Suarez Romero <jasuarez@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12036>
The basic to get the spirv built to nir, including calling some common
nir passes. Pending deep review if all those are needed or if we miss
some, but for that it would be better to be able to run existing
tests.
Enough to get assembly generated for simple tests.
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6766>
To ask to debug a registr allocation failure
(V3D_DEBUG_REGISTER_ALLOCATION seemed too long to me).
When a fallback register allocation algorithm was added, if the
register allocation fails, it only dumpg the current vir with the
register pressure info with the failed fallback. But if we want do
debug the problem, we would be interested on both.
Additionally, it was strange that we got the full vir dump with the
failure even if no debug option was set.
Additionally we add shaderdb like stats for those failures, to make
easier to compare one and the other.
v2: keep a small warning message in case both register allocation
algorithms fails (Neil)
Reviewed-by: Neil Roberts <nroberts@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6999>
I've been using my apitrace-based shader-db so far, but it's slow
(apitrace decompression), intrusive (apitrace windows spamming the
screen), and doesn't have much coverage. The original shader-db provides
a lot more coverage and compiles faster, at the expense of not having the
actual runtime variant key. As v3d has a lot less runtime variation than
vc4 did, this tradeoff makes more sense.
A few of the upcoming changes would make the V3D_DEBUG=cl output less
readable, so let's make proper CLIF file production be under a separate
V3D_DEBUG=clif flag.
Unlike vc4, where the compiler and gallium driver live together, for vc5
the compiler will live up in the shared broadcom directory, and need
access to the debug flags. Define a set of debug flags and helpers there,
so it can be shared between compiler, vc5, and vulkan.
