[Bug 71523] [IVB/HSW/BYT-M bisected] lightsmark v2008 performance reduced ~30%

Thu Nov 14 02:37:37 PST 2013

https://bugs.freedesktop.org/show_bug.cgi?id=71523

--- Comment #2 from Eero Tamminen <eero.t.tamminen at intel.com> ---
Looking at other test data from relevant time period:

* Why Lighstmark test is marked on HSW D as "blocked"?

* On HSW ULT & Mobile, performance drop is ~30% between 11-10 and 11-11, on IVB
D & M it's 37%, on BYT, the performance drop between 11-07 and 11-11 is ~45%.

* On HSW D, x11perf "aa10text" regressed during this interval 13% and
"rgb10text" regressed by 68%.  x11perf stuff is CPU bound, but it could be
unrelated as on BYT "aa10text" got 45% increase in its performance.

* There's no performance drop in any other tests on any other tested HW.

> Lightsmark makes a lot of calls to glDrawElements() each frame,

Nope.  It's an old program using glBegin/glEnd...

Stuff that Lighstmarks does in every frame:
   44922 glBindTexture (avg = 27.4 calls in each of 1638 frames)
   42369 glEnable (avg = 25.9 calls in each of 1638 frames)
   42336 glActiveTexture (avg = 25.8 calls in each of 1638 frames)
   30908 glVertex2f (avg = 18.9 calls in each of 1638 frames)
   30908 glMultiTexCoord2f (avg = 18.9 calls in each of 1638 frames)
   22780 glGetUniformLocation (avg = 13.9 calls in each of 1638 frames)
   22000 glMatrixMode (avg = 13.4 calls in each of 1637 frames)
   20253 glDisable (avg = 12.4 calls in each of 1638 frames)
   13310 glGetIntegerv (avg = 8.1 calls in each of 1638 frames)
    9737 glUniform1i (avg = 5.9 calls in each of 1638 frames)
    9582 glBlendFunc (avg = 5.9 calls in each of 1637 frames)
    7727 glEnd (avg = 4.7 calls in each of 1638 frames)
    7727 glBegin (avg = 4.7 calls in each of 1638 frames)
    7586 glUseProgram (avg = 4.6 calls in each of 1638 frames)
    7255 glUniform4f (avg = 4.4 calls in each of 1638 frames)
    6714 glPushMatrix (avg = 4.1 calls in each of 1637 frames)
    6714 glPopMatrix (avg = 4.1 calls in each of 1637 frames)
    6639 glLoadMatrixd (avg = 4.1 calls in each of 1637 frames)
    6534 glDepthMask (avg = 4.0 calls in each of 1638 frames)
    4917 glXMakeContextCurrent (avg = 3.0 calls in each of 1638 frames)
    4837 glClear (avg = 3.0 calls in each of 1637 frames)
    4762 glAlphaFunc (avg = 2.9 calls in each of 1637 frames)
    3954 glTexImage2D (avg = 33.5 calls in each of 118 frames)
    3754 glMultMatrixd (avg = 2.3 calls in each of 1637 frames)
    3274 glLoadIdentity (avg = 2.0 calls in each of 1637 frames)
    3267 glGetBooleanv (avg = 2.0 calls in each of 1638 frames)
    2708 glViewport (avg = 1.7 calls in each of 1638 frames)
    2509 glCallList (avg = 1.5 calls in each of 1637 frames)
    2464 glGetFloatv (avg = 1.5 calls in each of 1637 frames)
    1991 glColor3f (avg = 1.2 calls in each of 1637 frames)
    1922 glUniform3f (avg = 1.2 calls in each of 1637 frames)
    1736 glUniform4fv (avg = 1.1 calls in each of 1635 frames)
    1638 glFlush (avg = 1.0 calls in each of 1638 frames)
    1637 glOrtho (avg = 1.0 calls in each of 1637 frames)
    1637 glColor4f (avg = 1.0 calls in each of 1637 frames)

Stuff that Lighstmark does in some frames:
   60558 glClientActiveTexture (avg = 348.0 calls in each of 174 frames)
   60378 glTexCoordPointer (avg = 347.0 calls in each of 174 frames)
   30787 glVertexPointer (avg = 176.9 calls in each of 174 frames)
   30786 glDrawElements (avg = 176.9 calls in each of 174 frames)
   30441 glNormalPointer (avg = 174.9 calls in each of 174 frames)
   29929 glColorPointer (avg = 173.0 calls in each of 173 frames)
   28877 glCullFace (avg = 166.0 calls in each of 174 frames)
    6702 glTexParameteri (avg = 36.8 calls in each of 182 frames)
    3685 glPixelStorei (avg = 31.2 calls in each of 118 frames)
    2347 glBindFramebufferEXT (avg = 3.5 calls in each of 680 frames)
    1583 glFramebufferTexture2DEXT (avg = 2.3 calls in each of 680 frames)
    1583 glEnableClientState (avg = 9.1 calls in each of 174 frames)
    1569 glGenTextures (avg = 65.4 calls in each of 24 frames)
    1360 glColorMask (avg = 2.0 calls in each of 680 frames)
     933 glGetTexLevelParameteriv (avg = 1.4 calls in each of 684 frames)
     883 glDisableClientState (avg = 5.1 calls in each of 174 frames)
     819 glCheckFramebufferStatusEXT (avg = 1.2 calls in each of 680 frames)
     736 glPolygonOffset (avg = 1.1 calls in each of 680 frames)
     680 glClearDepth (avg = 1.0 calls in each of 680 frames)
     218 glUniformMatrix4fv (avg = 2.2 calls in each of 101 frames)
     177 glColor4ub (avg = 1.0 calls in each of 174 frames)
     167 glClearColor (avg = 2.0 calls in each of 84 frames)
     167 glReadBuffer (avg = 2.0 calls in each of 83 frames)
     167 glDrawBuffer (avg = 2.0 calls in each of 83 frames)
      83 glUniform2f (avg = 1.0 calls in each of 83 frames)
      83 glReadPixels (avg = 1.0 calls in each of 83 frames)

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