This was an ill-advised extension. While we advertised SWAP_COPY support,
we might implement it with a back-copy from the front buffer. And we
never advertised EXCHANGE because we couldn't guarantee it. So, if you
actually used this extension to try to reduce app redraws of the back
buffer, you might actually increase the bandwidth you used. Whoops.
Instead, GLX_EXT_buffer_age and the similar EGL extension give you
feedback on what's left in your back buffer, letting you do minimum
redraws.
This reduces our GLX visual+fbconfig count from 1410 to 940 on an llvmpipe
X server. Reducing visual counts will improve test runtime for
visual-iterating tests like piglit's glx-visuals-*.
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25650>
This is a prepare for removing _MTX_INITIALIZER_NP.
Signed-off-by: Yonggang Luo <luoyonggang@gmail.com>
Acked-by: David Heidelberg <david.heidelberg@collabora.com>
Acked-by: Eric Engestrom <eric@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21284>
Commit c65bde7b1e introduced a regression where under certain
circumstances `front` may be NULL, thus leading to a crash. It's not
currently known what exactly causes `front` to become NULL, nor we can
revert the offending commit, because there had been too many unrelated
changes that now depend on this commit.
So until someone comes up with a proper fix, let's add a workaround so
instead of crashing we just return from the function early.
This commit was tested with the bug `8982` and helps with the crash
with no other noticeable problems.
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/8982
Fixes: c65bde7b1e ("frontend/dri: inline __DRIdrawable in dri_drawable, make __DRIdrawable opaque")
Cc: mesa-stable
Signed-off-by: Konstantin Kharlamov <Hi-Angel@yandex.ru>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23093>
This provides a cached view of the current screen resources, with the
coordinates and refresh rate for every active CRTC. It's currently only
implemented for X11/XCB.
Fixes: 4752655649 ("egl/x11: implement ANGLE_sync_control_rate")
Reviewed-by: Adam Jackson <ajax@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20665>
the image_format_to_fourcc() function will be used from
egl/wayland hence make it non-static. Also move the function
into loader_dri_helper.c from loader_dri3_helper.c since
loader_dri3_helper library depends on xcb which will make
egl wayland depend on xcb indirectly.
v2: add loader tag to extern image_format_to_fourcc() (Marek Olšák)
V3: move image_format_to_fourcc to loader_dri_helper.c
Signed-off-by: Yogesh Mohanmarimuthu <yogesh.mohanmarimuthu@amd.com>
Reviewed-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13422>
Initialize dri_screendisplay_gpu variable in struct laoder_dri3_drawable.
Also make dri_screen_display_gpu variable as input parameter to function
loader_dri3_drawable_init() since dri_screen variable is initialized this way.
This also helps to avoid duplicate initializing dri_screen_display_gpu
in glx and egl code.
Signed-off-by: Yogesh Mohanmarimuthu <yogesh.mohanmarimuthu@amd.com>
Reviewed-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13422>
draw->cur_num_back is no longer used for immediately reducing the number
of allocated back buffers. It just reflects how many of them are
currently allocated, and is used to prevent allocating more if the
current maximum is already reached.
This fixes an issue where the current in-progress back buffer could get
freed, which would result in visible artifacts.
Unused buffers are freed once they exceed buffer age 200. This ensures
we do not keep around more buffers than necessary in the long run.
v2:
* Drop buffer age threshold to 200. This will free unused buffers more
quickly, and seems enough to avoid doing so prematurely even with
"glxgears -fullscreen" running at thousands of frames per second.
* Use "buf_id != LOADER_DRI3_FRONT_ID". (Pierre-Eric Pelloux-Prayer)
* Simplify loader_dri3_get_buffers changes slightly.
* We can now use any unallocated back buffer slot in dri3_find_back.
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20385>
The same functionnality can be achieved using GALLIUM_HUD=stdout,fps (and for
now a fallback is doing this if LIBGL_SHOW_FPS=1 is used).
This removes one entry from the vtable and simplify dri3_handle_present_event.
Reviewed-by: Emma Anholt <emma@anholt.net>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20494>
For simple clients using the swap chain contention back pressure to regulate
their drawing and that don't query buffer age introduce a new DRI option with
which set to true (the default is false) we block the client until a new buffer
is available. This way we stall the client's execution until a new buffer is
available and the redrawing of the client starts only at this point and not
before.
The motivation for that is to reduce latency for clients that regulate their
drawing by swapchain contention back pressure. These clients draw whenever
possible and their drawing is implicitly stopping whenever we block. When we
block at the end of the swap and return only when a new buffer is available
the client can draw and we directly present. Otherwise the client would draw,
we block on the buffer becoming available, and only then show what the client
had drawn, usually one frame later.
Co-authored-by: Michel Dänzer <michel@daenzer.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14684>
When modifiers == NULL, the free(modifiers) is a no-op, so we can just
remove it
Signed-off-by: Konstantin Kharlamov <Hi-Angel@yandex.ru>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>.
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17974>
if reply == NULL, the call `free(reply)` is a no-op, so we can have a
single check instead of two.
Signed-off-by: Konstantin Kharlamov <Hi-Angel@yandex.ru>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>.
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17974>
Note: The format __DRI_IMAGE_FORMAT_ABGR16161616 was already
in the dri2_format_table, but had been hidden from outside view,
for lack of an official DRM fourcc. Since its fourcc has now been
assigned, it is safe to reveal the format.
Signed-off-by: Manuel Stoeckl <code@mstoeckl.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14580>
e9c3dbd046 added PIPE_BIND_DRI_PRIME but it was only set when
importing a prime buffer.
This commit adds handling of this flag in the other codepath = the
one where the prime buffer is allocated by the render GPU.
With this change PIPE_BIND_DRI_PRIME is still only set for the
render GPU - the display GPU will never see this flag; a future
commit will rename it.
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14615>
Double buffered pbuffer need to update the front buffer,
otherwise we always get wrong value when glReadPixels().
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Qiang Yu <yuq825@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13750>
Sometimes this is the real front buffer depends on the place
called. Since it's the same LOADER_DRI3_FRONT_ID slot, just
name it dri3_front_buffer.
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Qiang Yu <yuq825@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13750>
Drawable type include more information which can be used
to distinguish pixmap and pbuffer which both treated as
pixmap before.
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Qiang Yu <yuq825@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13750>
In the test no front buffer has been allocated on the client
side, so we get a segfault when access it directly.
eglCopyBuffers() just need to do server side copy, so we don't
really need to create a client side front buffer to perform
the copy.
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Signed-off-by: Qiang Yu <yuq825@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13868>
Use createImageFromFds2 together with __DRI_IMAGE_PRIME_LINEAR_BUFFER, so
the driver's resource_from_handle hook will be aware that this specific
image is the linear buffer.
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13362>
This fixes SPECVIEWPERF13 creo test case hang:
1. Client: send present pixmap request (serial=1) when swap_interval==1
and increase send_sbc=1
2. Server: pend the request before vblank arrives
3. Client: set swap_interval=0 (so set XCB_PRESENT_OPTION_ASYNC),
send another present pixmap request (serial=2), increase send_sbc=2
4. Server: handle the async request immediately and send complete event
(serial=2)
5. Client: handle the event and set recv_sbc=event->serial=2
6. Server: vblank arrives so handle pending request and send complete
event (serial=1)
7. Client: handle the event and set recv_sbc=event->serial=1
8. Client: someone call loader_dri3_swapbuffer_barrier() and waiting
on recv_sbc==send_sbc, but no one will set recv_sbc=2 again
So basically it's caused by swap happens out of order. This commit
fixes the problem by waiting on the pending sync swaps all done when
switching to async mode, so move 6&7 before 3.
Attach the xtrace when problem happens:
005:<:003e: 72: Present-Request(148,1): Pixmap window=0x03000002 pixmap=0x0300000b serial=1 valid=0x00000000 update=0x00000000 x_off=0 y_off=0 target_crtc=0x00000000 wait_fence=0x00000000 idle_fence=0x0300000c options=0 target_msc=4294967296 divisor=0 remainder=0 notifies=;
...
005:<:0041: 72: Present-Request(148,1): Pixmap window=0x03000002 pixmap=0x03000011 serial=2 valid=0x00000000 update=0x00000000 x_off=0 y_off=0 target_crtc=0x00000000 wait_fence=0x00000000 idle_fence=0x03000012 options=Async target_msc=0 divisor=0 remainder=0 notifies=;
005:>:0041: Event Generic(35) Present(148) IdleNotify(2) event=0x03000006 window=0x03000002 serial=2 pixmap=0x03000011 idle_fence=0x03000012
005:>:0041: Event Generic(35) Present(148) CompleteNotify(1) kind=Pixmap(0x00) mode=Copy(0x00) event=0x03000006 window=0x03000002 serial=2 ust=7505462213117739011 msc=3565046193979392
005:>:0041: Event Generic(35) Present(148) IdleNotify(2) event=0x03000006 window=0x03000002 serial=1 pixmap=0x0300000b idle_fence=0x0300000c
005:>:0041: Event Generic(35) Present(148) CompleteNotify(1) kind=Pixmap(0x00) mode=Copy(0x00) event=0x03000006 window=0x03000002 serial=1 ust=7505533793042694147 msc=3565050488946688
Cc: mesa-stable
Reviewed-by: Michel Dänzer <mdaenzer@redhat.com>
Signed-off-by: Qiang Yu <yuq825@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13019>
For DRI_PRIME setup where the dGPU -> iGPU copy can happen asynchronously,
we need to ensure that we're not continuously reusing the same back buffer.
The existing code relies on XCB_PRESENT_EVENT_IDLE_NOTIFY to decide if
a buffer is busy or idle. If this event is received before the hardware
is done using the buffer, then it will reuse the same buffer and introduce
a dependency between the copy and the next frame.
This commit mitigates this by trying to allocate a different back buffer
when called from dri3_get_buffer (not from dri3_find_back_alloc, because it
seems that it expects dri3_get_buffer - see 0cc4c7e33e).
An alternative would be to query the busy-ness using is_resource_busy
but this complicates the code to achieve the same result.
One affected app is Unigine Superposition, and this change improves the
score by 0% - 5% depending on the settings.
This behavior is enabled if PIPE_CAP_PREFER_BACK_BUFFER_REUSE is 0.
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Acked-by: Michel Dänzer <mdaenzer@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12788>
If we have a different GPU dealing with display, we fallback to
exchanging linear buffers with the compositor. We should specify in
creating the linear buffer that this could be used for display.
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/4706
Cc: mesa-stable
Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11942>
Regions are not expensive objects on the server side, it's very slightly
cheaper to update an existing one than to create a new one, and we can
garbage collect them when the drawable is destroyed. Worse, XID reuse
bugs exist, so the more we can do to not churn through XIDs the better.
Reviewed-By: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11461>
The server starts off assuming the only XFIXES request the client might
known is FixesQueryVersion, and based on the version number the client
supplies it unlocks additional requests. If you forget to do this then
xcb_xfixes_create_region will throw BadRequest and you will be very
confused. libXfixes would hide this for you in extension setup but xcb
is not so forgiving.
Reviewed-By: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11461>
Allocates VRAM in display GPU in case of prime. Then the dma_buf is imported
into prime GPU.
v2: add comments to make code more readable (Pierre-Eric)
removed if check limiting p2p only for matching driver name
v3: keep old path for non mesa driver (Michel Dänzer)
v4: destroy linear_buffer_display_gpu after import (Michel Dänzer)
fall back if linear_buffer_display_gpu alloc fail (Michel Dänzer)
Signed-off-by: Yogesh Mohanmarimuthu <yogesh.mohanmarimuthu@amd.com>
Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10595>
Get rid of the code duplication and makes it easier to hook in a
new createImageWithModifiers2, but obscures the code flow a bit.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8106>
../src/loader/loader_dri3_helper.c: In function ‘dri3_free_buffers’:
../src/loader/loader_dri3_helper.c:2022:46: warning: ‘n_id’ may be used uninitialized in this function [-Wmaybe-uninitialized]
2022 | for (buf_id = first_id; buf_id < first_id + n_id; buf_id++) {
Can't happen, mark it unreachable.
Reviewed-by: Eric Anholt <eric@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8724>
With swap interval 0, i.e. sync-to-vblank disabled.
This can be necessary for unthrottled drawing with Xwayland:
1) One buffer can be scanned out
2) One buffer can be pending in the kernel for a page flip
3) One buffer can be pending in the Wayland compositor
Therefore, with 3 buffers, the frame-rate could be capped much lower
than the throughput the GPU is capable of, in the worst case at the
Wayland compositor refresh rate.
(The native Wayland EGL backend always uses up to 4 buffers)
Leave the maximum number of buffers at 3 for swap interval != 0, it's
sufficient in that case to always be able to queue one frame ahead of
time.
https://gitlab.gnome.org/GNOME/mutter/-/issues/1455https://gitlab.gnome.org/GNOME/mutter/-/issues/1462
Cc: mesa-stable
Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7033>
We'd previously take the copy path. If we were actually flipping (in
which case skipped frames are more likely to occur), we'd ping-pong
between a smaller and larger number of back buffers, and frame-rate
could vary / take a dip due to the buffer management overhead.
While I'm not sure this is actually possible to hit at this point, it
definitely will be with the next change.
Cc: mesa-stable
Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7033>
Previously, we would always allocate 3 buffers for page flipping. But 2
buffers can suffice for clients which always wait for buffer swaps to
complete before starting a new frame.
Therefore, keep track of the maximum number of buffers separately from
the current number, and only bump the latter if both current buffers are
busy.
Cc: mesa-stable
Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7033>
