commit 9c6fcdfe4549c8184f6c990505da3db6a9c95f94
author Jason Ekstrand <jason.ekstrand@intel.com> Tue Mar 14 20:48:47 2017 -0700
committer Andres Gomez <agomez@igalia.com> Wed Mar 29 19:12:57 2017 +0300
tree 7ae4a1d2b8ae2c47ed52559aeb1ef253713720cc
parent 6e2fb0cbcf5da43357741ddab7fa501ae8236ae3

anv/GetQueryPoolResults: Actually implement the spec

The Vulkan spec is fairly clear about when we should and should not
write query pool results.  We're also supposed to return VK_NOT_READY if
VK_QUERY_RESULT_PARTIAL_BIT is not set and we come across any queries
which are not yet finished.  This fixes rendering corruptions on The
Talos Principle where geometry flickers in and out due to bogus query
results being returned by the driver.  These issues are most noticable
on Sky Lake GT4 2hen running on "ultra" settings.

Reviewed-By: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=100182
Cc: "17.0 13.0" <mesa-stable@lists.freedesktop.org>
(cherry picked from commit 08df015b9de8ccb16ce6db93890910f8a02be4c6)
[Andres Gomez: use anv_query.c instead of genX_query.c]
Signed-off-by: Andres Gomez <agomez@igalia.com>

Conflicts:
	src/intel/vulkan/genX_query.c

src/intel/vulkan/anv_query.c

diff --git a/src/intel/vulkan/anv_query.c b/src/intel/vulkan/anv_query.c
index ac7f652..0cfd9e9 100644
--- a/src/intel/vulkan/anv_query.c
+++ b/src/intel/vulkan/anv_query.c
@@ -136,32 +136,52 @@
                            MIN2(size, pool->bo.size - offset));
    }
 
+   VkResult status = VK_SUCCESS;
    for (uint32_t i = 0; i < queryCount; i++) {
-      switch (pool->type) {
-      case VK_QUERY_TYPE_OCCLUSION: {
-         result = slot[firstQuery + i].end - slot[firstQuery + i].begin;
-         break;
-      }
-      case VK_QUERY_TYPE_PIPELINE_STATISTICS:
-         unreachable("pipeline stats not supported");
-      case VK_QUERY_TYPE_TIMESTAMP: {
-         result = slot[firstQuery + i].begin;
-         break;
-      }
-      default:
-         unreachable("invalid pool type");
+      bool available = slot[firstQuery + i].available;
+
+      /* From the Vulkan 1.0.42 spec:
+       *
+       *    "If VK_QUERY_RESULT_WAIT_BIT and VK_QUERY_RESULT_PARTIAL_BIT are
+       *    both not set then no result values are written to pData for
+       *    queries that are in the unavailable state at the time of the call,
+       *    and vkGetQueryPoolResults returns VK_NOT_READY. However,
+       *    availability state is still written to pData for those queries if
+       *    VK_QUERY_RESULT_WITH_AVAILABILITY_BIT is set."
+       */
+      bool write_results = available || (flags & VK_QUERY_RESULT_PARTIAL_BIT);
+
+      if (write_results) {
+         switch (pool->type) {
+         case VK_QUERY_TYPE_OCCLUSION: {
+            result = slot[firstQuery + i].end - slot[firstQuery + i].begin;
+            break;
+         }
+         case VK_QUERY_TYPE_PIPELINE_STATISTICS:
+            unreachable("pipeline stats not supported");
+         case VK_QUERY_TYPE_TIMESTAMP: {
+            result = slot[firstQuery + i].begin;
+            break;
+         }
+         default:
+            unreachable("invalid pool type");
+         }
+      } else {
+         status = VK_NOT_READY;
       }
 
       if (flags & VK_QUERY_RESULT_64_BIT) {
          uint64_t *dst = pData;
-         dst[0] = result;
+         if (write_results)
+            dst[0] = result;
          if (flags & VK_QUERY_RESULT_WITH_AVAILABILITY_BIT)
             dst[1] = slot[firstQuery + i].available;
       } else {
          uint32_t *dst = pData;
          if (result > UINT32_MAX)
             result = UINT32_MAX;
-         dst[0] = result;
+         if (write_results)
+            dst[0] = result;
          if (flags & VK_QUERY_RESULT_WITH_AVAILABILITY_BIT)
             dst[1] = slot[firstQuery + i].available;
       }
@@ -171,5 +191,5 @@
          break;
    }
 
-   return VK_SUCCESS;
+   return status;
 }