ci/piglit: Add some common piglit skips for Mesa CI's testing of glx.

Since our X servers don't have a compositor, and we run tests in parallel,
various swap and frontbuffer tests won't ever be stable.  Rather than
having every driver have to track those flakes, make a general X11 skips
list as a known issue of our CI rather than pointing fingers at drivers.

Acked-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Acked-by: Karol Herbst <kherbst@redhat.com>
Acked-by: Martin Roukala <martin.roukala@mupuf.org>
Acked-by: David Heidelberg <david.heidelberg@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20798>

.gitlab-ci/all-skips.txt

@@ -15,3 +15,20 @@ glx@glx_arb_sync_control@timing.*
 
 # This test is not built with waffle, while we do build tests with waffle
 spec@!opengl 1.1@windowoverlap
+
+# These tests all read from the front buffer after a swap.  Given that we
+# run piglit tests in parallel in Mesa CI, and don't have a compositor
+# running, the frontbuffer reads may end up with undefined results from
+# windows overlapping us.
+#
+# Piglit does mark these tests as not to be run in parallel, but deqp-runner
+# doesn't respect that.  We need to extend deqp-runner to allow some tests to be
+# marked as single-threaded and run after the rayon loop if we want to support
+# them.
+#
+# Note that "glx-" tests don't appear in x11-skips.txt because they can be
+# run even if PIGLIT_PLATFORM=gbm (for example)
+glx@glx-copy-sub-buffer.*
+# Reads the front buffer but it doesn't have to.
+# https://gitlab.freedesktop.org/mesa/piglit/-/merge_requests/755
+glx-swap-copy

.gitlab-ci/deqp-runner.sh

@@ -116,6 +116,10 @@ if [ -e "$INSTALL/$GPU_VERSION-skips.txt" ]; then
     DEQP_SKIPS="$DEQP_SKIPS $INSTALL/$GPU_VERSION-skips.txt"
 fi
 
+if [ "$PIGLIT_PLATFORM" != "gbm" ] ; then
+    DEQP_SKIPS="$DEQP_SKIPS $INSTALL/x11-skips.txt"
+fi
+
 report_load() {
     echo "System load: $(cut -d' ' -f1-3 < /proc/loadavg)"
     echo "# of CPU cores: $(cat /proc/cpuinfo | grep processor | wc -l)"

.gitlab-ci/piglit/piglit-runner.sh

@@ -76,6 +76,10 @@ if [ -e "$INSTALL/$GPU_VERSION-skips.txt" ]; then
     PIGLIT_SKIPS="$PIGLIT_SKIPS $INSTALL/$GPU_VERSION-skips.txt"
 fi
 
+if [ "$PIGLIT_PLATFORM" != "gbm" ] ; then
+    PIGLIT_SKIPS="$PIGLIT_SKIPS $INSTALL/x11-skips.txt"
+fi
+
 set +e
 
 piglit-runner \

.gitlab-ci/x11-skips.txt

@@ -0,0 +1,19 @@
+# These tests all read from the front buffer after a swap.  Given that we
+# run piglit tests in parallel in Mesa CI, and don't have a compositor
+# running, the frontbuffer reads may end up with undefined results from
+# windows overlapping us.
+#
+# Piglit does mark these tests as not to be run in parallel, but deqp-runner
+# doesn't respect that.  We need to extend deqp-runner to allow some tests to be
+# marked as single-threaded and run after the rayon loop if we want to support
+# them.
+#
+# Other front-buffer access tests like fbo-sys-blit, fbo-sys-sub-blit, or
+# fcc-front-buffer-distraction don't appear here, because the DRI3 fake-front
+# handling should be holding the pixels drawn by the test even if we happen to fail
+# GL's window system pixel occlusion test.
+#
+# Note that glx skips don't appear here, they're in all-skips.txt (in case someone
+# sets PIGLIT_PLATFORM=gbm to mostly use gbm, but still has an X server running).
+spec@!opengl 1.0@gl-1.0-swapbuffers-behavior
+spec@!opengl 1.1@read-front

src/amd/ci/radeonsi-raven-skips.txt

@@ -32,7 +32,6 @@ spec@ext_external_objects@vk-pix-buf-update-errors
 spec@ext_external_objects_fd@semaphore-api-errors
 spec@ext_external_objects_fd@memory-object-api-errors
 spec@ext_external_objects@vk-vert-buf-reuse
-glx@glx-swap-copy
 # From https://github.com/marekolsak/marek-build/blob/master/run-piglit.sh#L36
 spec@!opengl 1.0@gl-1.0-blend-func
 spec@!opengl 1.2@tex3d-maxsize
@@ -67,4 +66,3 @@ spec@ext_external_objects@vk-pix-buf-update-errors
 spec@ext_external_objects_fd@semaphore-api-errors
 spec@ext_external_objects_fd@memory-object-api-errors
 spec@ext_external_objects@vk-vert-buf-reuse
-glx@glx-swap-copy

src/amd/ci/radeonsi-stoney-skips.txt

@@ -32,7 +32,7 @@ spec@ext_external_objects@vk-pix-buf-update-errors
 spec@ext_external_objects_fd@semaphore-api-errors
 spec@ext_external_objects_fd@memory-object-api-errors
 spec@ext_external_objects@vk-vert-buf-reuse
-glx@glx-swap-copy
+
 # From https://github.com/marekolsak/marek-build/blob/master/run-piglit.sh#L36
 spec@!opengl 1.0@gl-1.0-blend-func
 spec@!opengl 1.2@tex3d-maxsize
@@ -76,13 +76,7 @@ glx@glx-copy-sub-buffer samples=6
 glx@glx-swap-event_event
 glx@glx-buffer-age
 glx@glx-buffer-age vblank_mode=0
-glx@glx-copy-sub-buffer
-glx@glx-copy-sub-buffer samples=2
-glx@glx-copy-sub-buffer samples=4
-glx@glx-copy-sub-buffer samples=6
-glx@glx-copy-sub-buffer samples=8
 glx@glx-multithread-buffer
 glx@glx-swap-event_async
 glx@glx-swap-event_event
 glx@glx-swap-event_interval
-spec@!opengl 1.0@gl-1.0-swapbuffers-behavior

src/freedreno/ci/freedreno-a530-flakes.txt

@@ -58,11 +58,9 @@ dEQP-GLES31.functional.synchronization.inter_call.without_memory_barrier.*
 
 dEQP-GLES31.functional.texture.gather.basic.2d_array.rgba8.filter_mode.min_nearest_mipmap_nearest_mag_linear
 
-glx@glx-swap-copy
 glx@glx-swap-event_interval
 glx@glx_arb_sync_control@swapbuffersmsc-divisor-zero
 glx@glx_arb_sync_control@waitformsc
-glx@glx-copy-sub-buffer.*
 glx@glx-multithread-texture
 glx@glx-swap-event_async
 shaders@glsl-uniform-interstage-limits@subdivide 5

src/freedreno/ci/freedreno-a618-flakes.txt

@@ -112,8 +112,6 @@ KHR-.*.shader_storage_buffer_object.advanced-unsizedArrayLength-fs-std140-matR
 
 glx@glx_arb_sync_control@swapbuffersmsc-divisor-zero
 glx@glx_arb_sync_control@waitformsc
-glx@glx-copy-sub-buffer.*
-glx@glx-swap-copy
 glx@glx-swap-event_interval
 glx@glx-visuals-depth
 glx@glx-visuals-stencil

src/freedreno/ci/freedreno-a630-flakes.txt

@@ -110,8 +110,6 @@ KHR-GLES31.core.shader_storage_buffer_object.advanced-unsizedArrayLength-fs-std4
 
 glx@glx_arb_sync_control@swapbuffersmsc-divisor-zero
 glx@glx_arb_sync_control@waitformsc
-glx@glx-copy-sub-buffer.*
-glx@glx-swap-copy
 glx@glx-swap-event_async
 glx@glx-swap-event_interval
 glx@glx-visuals-depth

src/gallium/drivers/llvmpipe/ci/llvmpipe-fails.txt

@@ -26,17 +26,12 @@ dEQP-GLES3.functional.fbo.blit.rect.nearest_consistency_min_reverse_src_x,Fail
 spec@glsl-1.20@compiler@invalid-vec4-array-to-vec3-array-conversion.vert,Fail
 spec@oes_shader_io_blocks@compiler@layout-location-aliasing.vert,Fail
 
-glx@glx-copy-sub-buffer,Fail
-glx@glx-copy-sub-buffer samples=2,Fail
-glx@glx-copy-sub-buffer samples=4,Fail
-
 # X Error of failed request:  BadMatch (invalid parameter attributes)
 #   Major opcode of failed request:  150 (GLX)
 #   Minor opcode of failed request:  11 (X_GLXSwapBuffers)
 glx@glx-make-current,Crash
 
 glx@glx-multi-window-single-context,Fail
-glx@glx-swap-copy,Fail
 glx@glx-swap-pixmap-bad,Fail
 
 # X Error of failed request:  BadDrawable (invalid Pixmap or Window parameter)
@@ -75,12 +70,6 @@ spec@!opengl 1.1@polygon-mode-offset@config 4: Expected white pixel on bottom ed
 spec@!opengl 1.1@polygon-mode-offset@config 4: Expected white pixel on left edge,Fail
 spec@!opengl 1.1@polygon-mode-offset@config 4: Expected white pixel on right edge,Fail
 spec@!opengl 1.1@polygon-mode-offset@config 4: Expected white pixel on top edge,Fail
-spec@!opengl 1.1@read-front,Fail
-spec@!opengl 1.1@read-front clear-front-first,Fail
-spec@!opengl 1.1@read-front clear-front-first samples=2,Fail
-spec@!opengl 1.1@read-front clear-front-first samples=4,Fail
-spec@!opengl 1.1@read-front samples=2,Fail
-spec@!opengl 1.1@read-front samples=4,Fail
 spec@!opengl 3.0@clearbuffer-depth-cs-probe,Fail
 spec@!opengl 3.2@layered-rendering@clear-color-mismatched-layer-count,Fail
 spec@arb_enhanced_layouts@execution@component-layout@vs-fs-array-dvec3,Fail

src/gallium/drivers/softpipe/ci/softpipe-fails.txt

@@ -916,7 +916,6 @@ glx@glx-make-current,Crash
 
 glx@glx-multi-context-front,Fail
 glx@glx-multi-window-single-context,Fail
-glx@glx-swap-copy,Fail
 glx@glx-swap-pixmap-bad,Fail
 
 # X Error of failed request:  BadMatch (invalid parameter attributes)

src/gallium/drivers/softpipe/ci/softpipe-flakes.txt

@@ -8,6 +8,5 @@ glx@glx-swap-singlebuffer
 # Sometimes crashes, less so since moving to the google runners
 spec@arb_sync@sync_api
 
-spec@!opengl 1.1@read-front clear-front-first
 spec@ext_framebuffer_blit@fbo-sys-blit
 spec@ext_framebuffer_blit@fbo-sys-sub-blit

src/gallium/drivers/virgl/ci/virpipe-gl-fails.txt

@@ -79,7 +79,6 @@ glx@glx-make-current,Crash
 glx@glx-multi-window-single-context,Fail
 glx@glx-multithread-clearbuffer,Crash
 glx@glx-multithread-texture,Crash
-glx@glx-swap-copy,Fail
 glx@glx-swap-pixmap-bad,Fail
 glx@glx-tfp,Crash
 glx@glx-visuals-depth,Crash
@@ -142,12 +141,6 @@ spec@!opengl 1.1@polygon-mode-offset@config 0: Expected blue pixel in center,Fai
 spec@!opengl 1.1@polygon-mode-offset@config 1: Expected blue pixel in center,Fail
 spec@!opengl 1.1@polygon-mode-offset@config 2: Expected blue pixel in center,Fail
 spec@!opengl 1.1@polygon-mode-offset@config 6: Expected blue pixel in center,Fail
-spec@!opengl 1.1@read-front,Fail
-spec@!opengl 1.1@read-front clear-front-first,Fail
-spec@!opengl 1.1@read-front clear-front-first samples=2,Fail
-spec@!opengl 1.1@read-front clear-front-first samples=4,Fail
-spec@!opengl 1.1@read-front samples=2,Fail
-spec@!opengl 1.1@read-front samples=4,Fail
 spec@!opengl 1.1@texwrap 1d bordercolor,Fail
 spec@!opengl 1.1@texwrap 1d bordercolor@GL_RGBA8- border color only,Fail
 spec@!opengl 1.1@texwrap 1d proj bordercolor,Fail

src/gallium/drivers/virgl/ci/virpipe-gl-flakes.txt

@@ -52,4 +52,3 @@ spec@nv_primitive_restart@primitive-restart-draw-mode-quads
 shaders@glsl-uniform-interstage-limits@subdivide 5- statechanges
 spec@arb_framebuffer_no_attachments@arb_framebuffer_no_attachments-atomic@glScissor
 spec@arb_framebuffer_no_attachments@arb_framebuffer_no_attachments-atomic@glViewport
-glx@glx-copy-sub-buffer.*

src/intel/ci/iris-kbl-flakes.txt

@@ -3,9 +3,6 @@ spec@amd_performance_monitor@measure
 spec@amd_performance_monitor@measure@change counters while active
 spec@amd_performance_monitor@measure@counters in range
 
-glx@glx-copy-sub-buffer samples=2
-glx@glx-copy-sub-buffer samples=16
-
 #X Error of failed request:  BadValue (integer parameter out of range for operation)
 #  Major opcode of failed request:  148 ()
 #  Minor opcode of failed request:  4
@@ -14,8 +11,6 @@ glx@glx-copy-sub-buffer samples=16
 #  Current serial number in output stream:  45
 glx@glx-multi-context-ib-1
 
-glx@glx-swap-copy
-
 # The following two case are xfails, but sometimes pass.
 spec@egl_chromium_sync_control@conformance
 # piglit: error: SBC did not change after second SwapBuffers: 0

src/panfrost/ci/panfrost-g52-flakes.txt

@@ -1,6 +1,5 @@
 glx@glx_arb_sync_control@waitformsc
 glx@glx_arb_sync_control@swapbuffersmsc-divisor-zero
-glx@glx-copy-sub-buffer samples=2
 glx@glx-multithread-texture
 glx@glx-multithread-shader-compile
 spec@arb_draw_buffers@fbo-mrt-new-bind