[Mesa-dev] V3 On disk shader cache for i965 (Now with real world results!)

[Timothy Arceri]

On Wed, 2016-07-13 at 23:51 +0300, Grazvydas Ignotas wrote:
> On Wed, Jul 13, 2016 at 2:56 AM, Timothy Arceri
> <timothy.arceri at collabora.com> wrote:
> > On Sat, 2016-07-09 at 20:21 +0300, Grazvydas Ignotas wrote:
> > > 
> > > I think I still have some more:
> > > - running 32bit program after 64bit version of the same thing (or
> > > vice
> > > versa) leads to segfaults and assert hits. Probably easiest to
> > > build
> > > 32bit and 64bit apitrace and play some traces.
> > > - a trace from comment 2 of bug 96624 doesn't seem to render on
> > > cache.
> > 
> > I can't seem to reproduce this. I created some traces using the 32-
> > bit
> > and 64-bit versions of The Talos Principle but they seems to run
> > with
> > no issues. I've pushed updates to the shader-cache branch maybe I
> > fixed
> > something.
> 
> Still crashes here. What I do:
> 1. build 64bit and 32bit versions of apitrace
> 2. get the trace from bug 96425
> 3. rm -rf ~/.cache/mesa/
> 4. MESA_GLSL_CACHE_ENABLE=1 build64/glretrace -b Talos_flicker2.trace
> 5. MESA_GLSL_CACHE_ENABLE=1 build32/glretrace -b Talos_flicker2.trace

ok so I'd used a different commit to build the 32bit and 64bit builds
which caused the shader-cache to fallback and recompile the shader so I
didn't hit the errors, whoops.

Anyway I've pushed a fix to the shader-cache branch.

Thanks,
Tim

> 
> Program received signal SIGSEGV, Segmentation fault.
> 0xf751b8cb in read_atomic_buffers (prog=<optimized out>,
> metadata=0xffffba34) at glsl/shader_cache.cpp:405
> 405                *stage_buff_list[j] = &prog->AtomicBuffers[i];
> (gdb) bt
> #0  0xf751b8cb in read_atomic_buffers (prog=<optimized out>,
> metadata=0xffffba34) at glsl/shader_cache.cpp:405
> #1  shader_cache_read_program_metadata (ctx=0xf6d18020,
> prog=0x88ac610) at glsl/shader_cache.cpp:1283
> #2  0xf748eeaf in link_shaders (ctx=0xf6d18020, prog=0x88ac610,
> is_cache_fallback=false) at glsl/linker.cpp:4541
> #3  0xf73d289c in _mesa_glsl_link_shader (ctx=0xf6d18020,
> prog=0x88ac610, is_cache_fallback=false)
>     at program/ir_to_mesa.cpp:3073
> #4  0xf72c682a in _mesa_link_program (ctx=0xf6d18020,
> shProg=0x88ac610) at main/shaderapi.c:1099
> #5  0xf72c7e47 in _mesa_LinkProgram (programObj=14) at
> main/shaderapi.c:1603
> #6  0x08264000 in _get_glLinkProgram(unsigned int) ()
> #7  0x0810ef17 in retrace_glLinkProgram(trace::Call&) ()
> 
> Gražvydas
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