Commit graph

1469 commits

Author SHA1 Message Date
Yiwei Zhang
7c22ece8e4 util: fix sign comparison
Signed-off-by: Yiwei Zhang <zzyiwei@chromium.org>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Ryan Neph <ryanneph@google.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13074>
2021-09-30 04:19:27 +00:00
Rhys Perry
2f0a007976 radv: workaround incorrect image format with World War Z
The image format in a FSR-related shader is incorrect.

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/5407
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13084>
2021-09-29 21:13:15 +00:00
Timothy Arceri
7188e7c87d util/cache: test simple cache put and get between instances
To make sure we are not just using the in-memory cache index for
the single file cache, we test adding and retriving cache items
between two different cache instances.

Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12925>
2021-09-28 01:12:33 +00:00
Yevhenii Kolesnikov
2db5536a46 vulkan: Add vk_asprintf and vk_vasprintf helpers
Signed-off-by: Yevhenii Kolesnikov <yevhenii.kolesnikov@globallogic.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10318>
2021-09-23 21:14:32 +00:00
Christian Gmeiner
54ea23da51 util/tests: add set bit range test
This simple test validates that it is possible to set bits
across word bounary.

Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Reviewed-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11321>
2021-09-21 20:25:31 +00:00
Christian Gmeiner
b3b03e33c9 util/bitset: add BITSET_SET_RANGE(..)
This version works across word boundary.

Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Reviewed-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11321>
2021-09-21 20:25:31 +00:00
Christian Gmeiner
3d65cea6ee util/bitset: s/BITSET_SET_RANGE/BITSET_SET_RANGE_INSIDE_WORD
Prep work for the next commit.

Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Reviewed-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11321>
2021-09-21 20:25:31 +00:00
Christian Gmeiner
3d3a4b9b01 util/tests: add bitset SHL tests
Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Reviewed-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11321>
2021-09-21 20:25:31 +00:00
Christian Gmeiner
6171bc2243 util/bitset: add left shift
Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Reviewed-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11321>
2021-09-21 20:25:31 +00:00
Christian Gmeiner
0c243b3f98 util/tests: add bitset SHR tests
Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Reviewed-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11321>
2021-09-21 20:25:31 +00:00
Christian Gmeiner
7b62fb4558 util/bitset: add right shift
Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Reviewed-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11321>
2021-09-21 20:25:31 +00:00
Christian Gmeiner
79067c4744 util/tests: add bitwise AND, OR and NOT tests
Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Reviewed-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11321>
2021-09-21 20:25:31 +00:00
Christian Gmeiner
cfa8828c62 util/bitset: add bitwise AND, OR and NOT
Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Reviewed-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11321>
2021-09-21 20:25:31 +00:00
Christian Gmeiner
f8ea9fa0f8 util/tests: rename bitset test names
Imho they are quite hard to read with the added '_'.

Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Reviewed-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11321>
2021-09-21 20:25:31 +00:00
Timothy Arceri
81c8c7d998 util/cache: run basic cache tests on the single file cache
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12745>
2021-09-17 01:25:46 +00:00
Marek Olšák
921c770d49 driconf: remove leftover code for allow_incorrect_primitive_id
Reviewed-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12809>
2021-09-13 22:23:27 +00:00
Simon Ser
3c18e69078 vulkan/wsi/x11: add driconf option to not wait under Xwayland
By default, Mesa's X11 Vulkan WSI will wait for buffers to be ready
before submitting them to Xwayland when the swapchain is created
with the IMMEDIATE mode.

This is undesirable when the Wayland compositor already monitors
fences. A Wayland compositor may want to know the delay between
the buffer submition and the end of the GPU work, this is impossible
to measure if the WSI waits for the buffer to be ready before
submission.

Since most compositors don't monitor fences, let's introduce a driconf
option for this for now. We can reconsider once more compositors
have better support for fences.

Signed-off-by: Simon Ser <contact@emersion.fr>
Acked-by: Michel Dänzer <mdaenzer@redhat.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11290>
2021-09-13 19:38:13 +00:00
Danylo Piliaiev
4092d5f0d8 u_trace: pass command stream through tracing functions
Allows writing timestamps into different command streams.

Signed-off-by: Danylo Piliaiev <dpiliaiev@igalia.com>
Reviewed-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10969>
2021-09-10 14:58:28 +03:00
Danylo Piliaiev
0565c993f9 u_trace: helpers for tracing tiling GPUs and re-usable VK cmdbuffers
Re-usable command buffer could be resubmitted any number of times,
but tracepoints are written once. u_trace_clone_append allows
copying tracepoints and copying timestamps if GPU doesn't support
writing timestamps into indirect address.

The case of tiling GPUs is similar, command stream for draws is
resubmitted for each tile.

Signed-off-by: Danylo Piliaiev <dpiliaiev@igalia.com>
Reviewed-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10969>
2021-09-10 14:58:28 +03:00
Danylo Piliaiev
cefaa73909 util/u_trace: auto-generation of serialization funcs for tracepoints
Add ability to auto-generate:
- printing of args for "GPU_TRACE=1", still could be overriden with
  tp_print.
- population of extra data for perfetto event.

Signed-off-by: Danylo Piliaiev <dpiliaiev@igalia.com>
Reviewed-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10969>
2021-09-10 14:58:28 +03:00
Danylo Piliaiev
e14f525280 util/u_trace: make u_trace usable for other than gallium drivers
With little modifications u_trace could be usable for Vulkan drivers.

Beside removing dependencies on gallium, the other notable change is
the passing of opaque flush_data pointer via u_trace_flush. There
is data which becomes available only at this point which other drivers
may want to pass.

For example Vulkan drivers would want to pass at least submission id
(for perfetto) and a sync object to wait on in u_trace_read_ts.

Signed-off-by: Danylo Piliaiev <dpiliaiev@igalia.com>
Reviewed-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10969>
2021-09-10 14:58:28 +03:00
Bas Nieuwenhuizen
8de60a1654 util/fossilize_db: Don't corrupt keys during entry read.
We change the hash that is still used to set entry->key.

Fixes: d2d642cc01 "util/fossilize_db: Only allocate entries after full read."
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12725>
2021-09-04 15:12:06 +02:00
Adrian Bunk
7155676618 util/format: NEON is not available with the soft-float ABI
Fixes: 80923e8d58 ("util/format: Add some NEON intrinsics-based u_format_unpack.")
Reviewed-by: Emma Anholt <emma@anholt.net>
Tested-by: Ross Burton <ross.burton@arm.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12569>
2021-09-01 15:18:02 +00:00
Marek Olšák
386e5371a7 util/cpu_detect: add/guess support for next Zen CPUs
so that we don't have to update this anymore

Reviewed-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12335>
2021-08-31 22:29:21 +00:00
Marek Olšák
d7a36d8907 util/cpu_detect: print num_L3_caches and num_cpu_mask_bits
Reviewed-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12335>
2021-08-31 22:29:21 +00:00
Jeremy Newton
80b5f4ff08 Fix building AMD MM/GL with EL7
This partially reverts commit 4d9acfa533.

The original patch said:

"Python 3 handles unicode strings by default, so we can drop all that."

But this breaks building on RHEL 7 (or similiar) since python3 support
on is much more limited than newer distros. Backporting all the needed
python 3 libraries to EL7 is a pretty big task, and isn't very easy to
maintain.

For workstation purposes, we need the AMD MM/GL driver building on RHEL
7, so only src/util/driconf_static.py needs to be reverted.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Signed-off-by: Jeremy Newton <Jeremy.Newton@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12549>
2021-08-27 19:05:25 +00:00
Simon Zeni
973e9e25bd util/u_debug_symbol: remove debug_symbol_name_glibc and execinfo dependency
Signed-off-by: Simon Zeni <simon@bl4ckb0ne.ca>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12108>
2021-08-26 01:47:30 +00:00
Marek Olšák
8886bf9a47 gallium: use a packed enum to make pipe_prim_mode 1-byte large with __GNUC__
Reviewed-By: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12480>
2021-08-24 10:43:44 -04:00
Ian Romanick
2b4b31044d util/xmlconfig: Test values set via the environment
driconf options can also be set via environment variables.  This is a
simple touch-test of that feature.

Reviewed-by: Emma Anholt <emma@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12477>
2021-08-21 00:53:18 +00:00
Ian Romanick
1a6d1e9309 util/xmlconfig: Make unit tests more resilient against user env settings
Before this, setting 'vblank_mode=0' in the environment would cause a
unit test to fail.

Reviewed-by: Emma Anholt <emma@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12477>
2021-08-21 00:53:18 +00:00
Matt Turner
dcf1d8d7a4 util: Replace recursive DFS with iterative implementation
Doesn't fix, but improves the situation in issue #5163. The
VK.spirv_assembly.instruction.graphics.spirv_ids_abuse.lots_ids_* tests
emit about 160k instructions. ir3_sched blows out the stack after
dag_traverse_bottom_up_node reaches a depth of about 130k frames.

This patch replaces the recursively-implemented post-order traversal
with an iterative implementation using a stack, allowing us to process
DAGs as large as memory can hold.

Definitely makes you appreciate the elegance of recursion...

Reviewed-by: Emma Anholt <emma@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12232>
2021-08-17 17:54:09 +00:00
Matt Turner
9261a02028 util: Add unit tests for dag
Reviewed-by: Emma Anholt <emma@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12232>
2021-08-17 17:54:09 +00:00
Eric Engestrom
4d9acfa533 python: drop explicit output_encoding='utf-8' in mako templates
Python 3 handles unicode strings by default, so we can drop all that.

Suggested-by: Dylan Baker <dylan@pnwbakers.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3674>
2021-08-14 21:44:32 +00:00
Eric Engestrom
f1eae2f8bb python: drop python2 support
Signed-off-by: Eric Engestrom <eric@engestrom.ch>
Acked-by: Jose Fonseca <jfonseca@vmware.com>
Reviewed-by: Alyssa Rosenzweig <alyssa@collabora.com>
Reviewed-by: Dylan Baker <dylan@pnwbakers.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3674>
2021-08-14 21:44:32 +00:00
Axel Davy
6a0e703512 util: Fix translate from block compressed to rgba
Since
2b5178ee util: Switch the non-block formats to unpacking rgba rows instead of rects,
compressed formats define unpack_rgba_8unorm_rect instead
of unpack_rgba_8unorm.

Fixes the u_format_translate check to take this into account.
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/5201
Fixes: 2b5178ee ("util: Switch the non-block formats to unpacking rgba rows instead of rects")

Signed-off-by: Axel Davy <davyaxel0@gmail.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12315>
2021-08-12 20:30:42 +00:00
Jesse Natalie
68ff6f8be5 xmlconfig: Use static inline for regex fallback to prevent -O0 issues
A non-static inline function body is only actually emitted by GCC during optimization passes,
so running -O0 ends up never emitting the body, producing linker errors.

Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Charmaine Lee <charmainel@vmware.com>
Reviewed-by: Neha Bhende <bhenden@vmware.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12158>
2021-08-10 15:14:26 +00:00
Bas Nieuwenhuizen
30a359d633 util/fossilize_db: Add extra flock mutex.
The flock is per-fd, not per thread, and we do it outside of the main mutex. This was
done to avoid having to wait in the mutex, but we can get a case where one ends up running
the body with the flock unlocked.

Fix this by adding a mutex that doesn't need to be locked for reads.

Fixes: 4f0f8133a3 "util/fossilize_db: Do not lock the fossilize db permanently."
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12266>
2021-08-08 13:34:42 +02:00
Bas Nieuwenhuizen
75266ee44a util/fossilize_db: Unlock the cache file if the entry already exists.
Fixes: 4f0f8133a3 "util/fossilize_db: Do not lock the fossilize db permanently."
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12266>
2021-08-08 13:34:39 +02:00
Bas Nieuwenhuizen
1c4dce1aa7 util/fossilize_db: Use uint64_t for file size.
For those 32-bit systems with 4G of cache.

Fixes: 2ec1bff0f3 "util/fossilize_db: Split out reading the index."
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12266>
2021-08-08 13:34:35 +02:00
Bas Nieuwenhuizen
d2d642cc01 util/fossilize_db: Only allocate entries after full read.
Should void leaking entries on read failure.

Fixes: 2ec1bff0f3 "util/fossilize_db: Split out reading the index."
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12204>
2021-08-07 20:06:31 +00:00
Bas Nieuwenhuizen
96bfefe8d1 util/fossilize_db: Be conservative about header length check for locking.
Don't anticipate seeing any partial written headers but just in case we
should probably wait on the lock to make sure whatever header was being
written is finished being written.

Fixes: 4f0f8133a3 "util/fossilize_db: Do not lock the fossilize db permanently."
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12204>
2021-08-07 20:06:31 +00:00
Bas Nieuwenhuizen
3091277052 util/fossilize_db: Flush files after header write.
We should probably flush before we unlock the file again.

Fixes: 4f0f8133a3 "util/fossilize_db: Do not lock the fossilize db permanently."
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12204>
2021-08-07 20:06:31 +00:00
Bas Nieuwenhuizen
57ca07455c util/fossilize_db: Reset file position to parsed_offset on cache_offset read failure.
Otherwise we might restart reading from the middle of the entry.

Fixes: 2ec1bff0f3 "util/fossilize_db: Split out reading the index."
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12204>
2021-08-07 20:06:31 +00:00
Bas Nieuwenhuizen
3c51a3aa95 util/fossilize_db: Update parsed_offset correctly.
If things went perfectly parsed_offset was never updated for the
final entry and we'd seek_set to the start of the last entry. Is
fun when appending to the file next.

Fixes: 2ec1bff0f3 "util/fossilize_db: Split out reading the index."
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12204>
2021-08-07 20:06:31 +00:00
Ian Romanick
72259a870f util: Add and use functions to calculate min and max int for a size
Many places need to know the maximum or minimum possible value for a
given size integer... so everyone just open-codes their favorite
version.  There is some potential to hit either undefined or
implementation-defined behavior, so having one version that Just Works
seems beneficial.

v2: Fix copy-and-pasted bug (INT64_MAX instead of INT64_MIN) in
u_intmin.  Noticed by CI.  Lol.  Rename functions
`s/u_(uint|int)(min|max)/u_\1N_\2/g`.  Suggested by Jason.  Add some
unit tests that would have caught the copy-and-paste bug before wasting
CI time.  Change the implementation of u_intN_min to use the same
pattern as stdint.h.  This avoids the integer division.  Noticed by
Jason.

v3: Add changes to convert_clear_color
(src/gallium/drivers/iris/iris_clear.c).  Suggested by Nanley.

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Suggested-by: Jason Ekstrand <jason@jlekstrand.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12177>
2021-08-03 12:55:02 -07:00
Rob Clark
b9129496a2 freedreno: Unleash the dragon!
A number of android games are so far, sadly, unaware of open source
drivers.  And when they see an unknown driver they lump it in the lowest
performance tier, artificially limiting framerate and/or gfx settings.
So until the games catch up, use driconf to override vendor/renderer
settings for moar fps and nicer gfx.

Furthermore, some games seem to be limiting *too* conservatively when
we otherwise have plenty of headroom even if we claim to be a bigger
adreno.  Possibly a concession to battery life or tighter thermal
constraints in a phone, as compared to something like a chromebook.
Or maybe the flagship gaming phone thing is a scam ;-)

Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12135>
2021-08-02 16:37:26 -07:00
Rob Clark
7094cc78a4 driconf: Add force_gl_renderer override
Allow driconf to also override GL_RENDERER string.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12135>
2021-08-02 16:37:26 -07:00
Rob Clark
6edf0d8e90 driconfig: Add support for device specific config
Add support for driconf overrides on a per-device level, for cases
where we don't want to override behavior for all devices supported
by a particular driver.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12135>
2021-08-02 16:37:24 -07:00
Marek Olšák
4a713c568b gallium: add multi-component 64-bit UINT formats for raw double vertex attribs
This is the distinction between formats:
- PIPE_FORMAT_R64_FLOAT is the legacy "convert-to-float" vertex format.
- PIPE_FORMAT_R64_UINT is the raw double format.

Reviewed-by: Alyssa Rosenzweig <alyssa@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11370>
2021-08-02 19:58:28 +00:00
Ian Romanick
d78e980523 util/queue: Don't crash in util_queue_destroy when init failed
This simplifies the error exit paths for drivers that use these queues.

v2: Move allocation of queue->jobs after initializing the mutxes and
condition variables.  Noticed by Ken.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11229>
2021-07-28 17:32:44 +00:00