X-Git-Url: https://git.cworth.org/git?a=blobdiff_plain;f=TODO;h=e7f4276772d3fe8f1d3700721d51b157825162e8;hb=refs%2Fheads%2Fframe-timings;hp=36b970916150f7747971b03e06ce4a0c20d61f03;hpb=4d30b9d5c193266f33fbcf2adeb47c80cda4a3cd;p=fips

diff --git a/TODO b/TODO
index 36b9709..e7f4276 100644
--- a/TODO
+++ b/TODO
@@ -1,20 +1,3 @@
-Known bugs
-==========
-undefined symbol: glGenQueries
-
-	The problem here is code in libfips directly calling OpenGL
-	functions like glGenQueries but not linking against any OpenGL
-	library.
-
-	We don't want to link against any OpenGL library so that the
-	application itself can choose which OpenGL to use (and how to
-	link/load it).
-
-	The trick is to instead make these calls indirectly by first
-	calling glXGetProcAddressARB/eglGetProcAddress. There's some
-	proof-of-concept code for this in the stash-egl-lookup-fixups
-	branch, (which needs some cleaning up).
-
 Feature requests (small-scale, near-term changes)
 =================================================
 
@@ -36,10 +19,6 @@ Add Eric's tiny hash table for collecting per-shader statistics
 
 	people.freedesktop.org:~anholt/hash_table
 
-Sort list of shaders in output
-
-Use better units for shader activity (eg. absolute time, relative percentage)
-
 Capture GPU performance counters.
 
 Allow dumping of shader source for investigation
@@ -84,3 +63,17 @@ Explore using perf/LTTng probing instead of LD_PRELOAD wrapper
 
 	This has the advantage of allowing full-system,
 	multi-process data collection.
+
+Things to change while replaying to isolate impact of different pieces
+of the pipeline (list by Eero)
+==============================
+    The interesting "what is a bottleneck" experiments are
+    (from back of 3D pipeline to front):
+    - Disable blend (= disable related dst reads)
+    - Binding 1x1 / NULL texture instead of real ones [1]
+    - Using simple pass-through pixel shader instead of real ones [2]
+    - Use kill / discard pixel shader instead of real ones
+    - Use 0x0 / 1x1 scissor rect
+    - Front+backface cull
+    - Disable draws
+