4 files changed, 15 insertions, 2 deletions
diff --git a/src/mesa/drivers/dri/common/xmlpool/t_options.h b/src/mesa/drivers/dri/common/xmlpool/t_options.h
index 1e7eced06bd..7b441c68f2d 100644
--- a/src/mesa/drivers/dri/common/xmlpool/t_options.h
+++ b/src/mesa/drivers/dri/common/xmlpool/t_options.h
@@ -75,6 +75,11 @@ DRI_CONF_OPT_BEGIN(always_flush_cache,bool,def) \
         DRI_CONF_DESC(en,gettext("Enable flushing GPU caches with each draw call")) \
 DRI_CONF_OPT_END
 
+#define DRI_CONF_DISABLE_THROTTLING(def) \
+DRI_CONF_OPT_BEGIN(disable_throttling,bool,def) \
+	DRI_CONF_DESC(en,gettext("Disable throttling on first batch after flush")) \
+DRI_CONF_OPT_END
+
 #define DRI_CONF_FORCE_GLSL_EXTENSIONS_WARN(def) \
 DRI_CONF_OPT_BEGIN(force_glsl_extensions_warn,bool,def) \
         DRI_CONF_DESC(en,gettext("Force GLSL extension default behavior to 'warn'")) \
diff --git a/src/mesa/drivers/dri/intel/intel_context.c b/src/mesa/drivers/dri/intel/intel_context.c
index 2df70b75b47..bf4045eb3b6 100644
--- a/src/mesa/drivers/dri/intel/intel_context.c
+++ b/src/mesa/drivers/dri/intel/intel_context.c
@@ -440,7 +440,8 @@ intel_prepare_render(struct intel_context *intel)
     * so we just us the first batch we emitted after the last swap.
     */
    if (intel->need_throttle && intel->first_post_swapbuffers_batch) {
-      drm_intel_bo_wait_rendering(intel->first_post_swapbuffers_batch);
+      if (!intel->disable_throttling)
+         drm_intel_bo_wait_rendering(intel->first_post_swapbuffers_batch);
       drm_intel_bo_unreference(intel->first_post_swapbuffers_batch);
       intel->first_post_swapbuffers_batch = NULL;
       intel->need_throttle = false;
@@ -841,6 +842,11 @@ intelInitContext(struct intel_context *intel,
       intel->always_flush_cache = 1;
    }
 
+   if (driQueryOptionb(&intel->optionCache, "disable_throttling")) {
+      fprintf(stderr, "disabling flush throttling\n");
+      intel->disable_throttling = 1;
+   }
+
    return true;
 }
 
diff --git a/src/mesa/drivers/dri/intel/intel_context.h b/src/mesa/drivers/dri/intel/intel_context.h
index 2df15d4f3df..59cf1979f0e 100644
--- a/src/mesa/drivers/dri/intel/intel_context.h
+++ b/src/mesa/drivers/dri/intel/intel_context.h
@@ -285,6 +285,7 @@ struct intel_context
    bool no_rast;
    bool always_flush_batch;
    bool always_flush_cache;
+   bool disable_throttling;
 
    /* State for intelvb.c and inteltris.c.
     */
diff --git a/src/mesa/drivers/dri/intel/intel_screen.c b/src/mesa/drivers/dri/intel/intel_screen.c
index 32e92594c08..3ca10c8e534 100644
--- a/src/mesa/drivers/dri/intel/intel_screen.c
+++ b/src/mesa/drivers/dri/intel/intel_screen.c
@@ -80,6 +80,7 @@ PUBLIC const char __driConfigOptions[] =
      DRI_CONF_NO_RAST(false)
      DRI_CONF_ALWAYS_FLUSH_BATCH(false)
      DRI_CONF_ALWAYS_FLUSH_CACHE(false)
+     DRI_CONF_DISABLE_THROTTLING(false)
      DRI_CONF_FORCE_GLSL_EXTENSIONS_WARN(false)
      DRI_CONF_DISABLE_GLSL_LINE_CONTINUATIONS(false)
      DRI_CONF_DISABLE_BLEND_FUNC_EXTENDED(false)
@@ -94,7 +95,7 @@ PUBLIC const char __driConfigOptions[] =
    DRI_CONF_SECTION_END
 DRI_CONF_END;
 
-const GLuint __driNConfigOptions = 16;
+const GLuint __driNConfigOptions = 17;
 
 #include "intel_batchbuffer.h"
 #include "intel_buffers.h"