[Mesa-dev] [PATCH 04/15] radv: add debug flags for syncing shaders after every draw call

[Samuel Pitoiset]

To improve GPU hangs detection when shaders are stucked.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset at gmail.com>
---
 src/amd/vulkan/radv_cmd_buffer.c | 15 +++++++++++++++
 src/amd/vulkan/radv_debug.h      |  1 +
 src/amd/vulkan/radv_device.c     |  1 +
 3 files changed, 17 insertions(+)

diff --git a/src/amd/vulkan/radv_cmd_buffer.c b/src/amd/vulkan/radv_cmd_buffer.c
index 22d8adc5c8..edf44dabe1 100644
--- a/src/amd/vulkan/radv_cmd_buffer.c
+++ b/src/amd/vulkan/radv_cmd_buffer.c
@@ -32,6 +32,7 @@
 #include "sid.h"
 #include "gfx9d.h"
 #include "vk_format.h"
+#include "radv_debug.h"
 #include "radv_meta.h"
 
 #include "ac_debug.h"
@@ -367,6 +368,20 @@ void radv_cmd_buffer_trace_emit(struct radv_cmd_buffer *cmd_buffer)
 static void
 radv_cmd_buffer_after_draw(struct radv_cmd_buffer *cmd_buffer)
 {
+	if (cmd_buffer->device->debug_flags & RADV_DEBUG_SYNC_SHADERS) {
+		enum radv_cmd_flush_bits flags;
+
+		/* Force wait for graphics/compute engines to be idle. */
+		flags = RADV_CMD_FLAG_PS_PARTIAL_FLUSH |
+			RADV_CMD_FLAG_CS_PARTIAL_FLUSH;
+
+		si_cs_emit_cache_flush(cmd_buffer->cs, false,
+				       cmd_buffer->device->physical_device->rad_info.chip_class,
+				       NULL, 0,
+				       radv_cmd_buffer_uses_mec(cmd_buffer),
+				       flags);
+	}
+
 	radv_cmd_buffer_trace_emit(cmd_buffer);
 }
 
diff --git a/src/amd/vulkan/radv_debug.h b/src/amd/vulkan/radv_debug.h
index e45c987e6a..5c9cbade47 100644
--- a/src/amd/vulkan/radv_debug.h
+++ b/src/amd/vulkan/radv_debug.h
@@ -40,6 +40,7 @@ enum {
 	RADV_DEBUG_DUMP_SPIRV        = 0x400,
 	RADV_DEBUG_VM_FAULTS         = 0x800,
 	RADV_DEBUG_ZERO_VRAM         = 0x1000,
+	RADV_DEBUG_SYNC_SHADERS      = 0x2000,
 };
 
 enum {
diff --git a/src/amd/vulkan/radv_device.c b/src/amd/vulkan/radv_device.c
index 6b96a3da4a..5101bd7cb2 100644
--- a/src/amd/vulkan/radv_device.c
+++ b/src/amd/vulkan/radv_device.c
@@ -413,6 +413,7 @@ static const struct debug_control radv_debug_options[] = {
 	{"spirv", RADV_DEBUG_DUMP_SPIRV},
 	{"vmfaults", RADV_DEBUG_VM_FAULTS},
 	{"zerovram", RADV_DEBUG_ZERO_VRAM},
+	{"syncshaders", RADV_DEBUG_SYNC_SHADERS},
 	{NULL, 0}
 };
 
-- 
2.14.1