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-rw-r--r--libdrm/intel/intel_bufmgr_gem.c70
1 files changed, 55 insertions, 15 deletions
diff --git a/libdrm/intel/intel_bufmgr_gem.c b/libdrm/intel/intel_bufmgr_gem.c
index 9605cc7c..c94f82e2 100644
--- a/libdrm/intel/intel_bufmgr_gem.c
+++ b/libdrm/intel/intel_bufmgr_gem.c
@@ -163,6 +163,12 @@ struct _drm_intel_bo_gem {
static void drm_intel_gem_bo_reference_locked(drm_intel_bo *bo);
+static unsigned int
+drm_intel_gem_estimate_batch_space(drm_intel_bo **bo_array, int count);
+
+static unsigned int
+drm_intel_gem_compute_batch_space(drm_intel_bo **bo_array, int count);
+
static int
logbase2(int n)
{
@@ -915,6 +921,14 @@ drm_intel_gem_bo_exec(drm_intel_bo *bo, int used,
ret = ioctl(bufmgr_gem->fd, DRM_IOCTL_I915_GEM_EXECBUFFER, &execbuf);
} while (ret != 0 && errno == EAGAIN);
+ if (ret != 0 && errno == ENOMEM) {
+ fprintf(stderr, "Execbuffer fails to pin. Estimate: %u. Actual: %u. Available: %u\n",
+ drm_intel_gem_estimate_batch_space(bufmgr_gem->exec_bos,
+ bufmgr_gem->exec_count),
+ drm_intel_gem_compute_batch_space(bufmgr_gem->exec_bos,
+ bufmgr_gem->exec_count),
+ bufmgr_gem->gtt_size);
+ }
drm_intel_update_buffer_offsets (bufmgr_gem);
if (bufmgr_gem->bufmgr.debug)
@@ -1102,6 +1116,43 @@ drm_intel_gem_bo_clear_aperture_space_flag(drm_intel_bo *bo)
}
/**
+ * Return a conservative estimate for the amount of aperture required
+ * for a collection of buffers. This may double-count some buffers.
+ */
+static unsigned int
+drm_intel_gem_estimate_batch_space(drm_intel_bo **bo_array, int count)
+{
+ int i;
+ unsigned int total = 0;
+
+ for (i = 0; i < count; i++) {
+ drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *)bo_array[i];
+ if (bo_gem != NULL)
+ total += bo_gem->reloc_tree_size;
+ }
+ return total;
+}
+
+/**
+ * Return the amount of aperture needed for a collection of buffers.
+ * This avoids double counting any buffers, at the cost of looking
+ * at every buffer in the set.
+ */
+static unsigned int
+drm_intel_gem_compute_batch_space(drm_intel_bo **bo_array, int count)
+{
+ int i;
+ unsigned int total = 0;
+
+ for (i = 0; i < count; i++)
+ total += drm_intel_gem_bo_get_aperture_space(bo_array[i]);
+
+ for (i = 0; i < count; i++)
+ drm_intel_gem_bo_clear_aperture_space_flag(bo_array[i]);
+ return total;
+}
+
+/**
* Return -1 if the batchbuffer should be flushed before attempting to
* emit rendering referencing the buffers pointed to by bo_array.
*
@@ -1123,24 +1174,13 @@ drm_intel_gem_check_aperture_space(drm_intel_bo **bo_array, int count)
drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *)bo_array[0]->bufmgr;
unsigned int total = 0;
unsigned int threshold = bufmgr_gem->gtt_size * 3 / 4;
- int i;
- for (i = 0; i < count; i++) {
- drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *)bo_array[i];
- if (bo_gem != NULL)
- total += bo_gem->reloc_tree_size;
- }
+ total = drm_intel_gem_estimate_batch_space(bo_array, count);
+
+ if (total > threshold)
+ total = drm_intel_gem_compute_batch_space(bo_array, count);
if (total > threshold) {
- total = 0;
- for (i = 0; i < count; i++)
- total += drm_intel_gem_bo_get_aperture_space(bo_array[i]);
-
- for (i = 0; i < count; i++)
- drm_intel_gem_bo_clear_aperture_space_flag(bo_array[i]);
- }
-
- if (total > bufmgr_gem->gtt_size * 3 / 4) {
DBG("check_space: overflowed available aperture, %dkb vs %dkb\n",
total / 1024, (int)bufmgr_gem->gtt_size / 1024);
return -1;