Le 21/01/2017 à 18:01, Rebecca N. Palmer a écrit : > I have a first attempt at "enable/disable 2.0 at run time" written, > but haven't yet tested it.
OK. I have both an Haswell and Skylake machine at hand if this can help in testing. > On 21/01/17 16:08, Bruno Pagani wrote: >> Le 21/01/2017 à 16:55, Rebecca N. Palmer a écrit : >> >>> On 21/01/17 15:40, Bruno Pagani wrote: >>>> Le 21/01/2017 à 16:20, Rebecca N. Palmer a écrit : >>>> >>>>>> is there any downside in compiling with >>>>>> OpenCL 2.0 support, >>>>> Yes - on older (Ivybridge/Haswell - no emitUntypedReadA64Instruction) >>>>> hardware, a 2.0-enabled beignet won't work, at all. >>>> >>>> That’s what I’ve feared but after trying it here I haven’t encountered >>>> more issues than with a non-2.0-enabled beignet. >>> >>> Trying it on what hardware? There might be hardware (all of gen8 if >>> this assert(0) is the only failure point) where a 2.0 build doesn't >>> crash outright but also doesn't have working 2.0. >> >> Haswell (HD4600). > > Weird - are you sure darktable loads OpenCL by default? Not in the default configuration, but does in mine. It also sucessfully executed some tasks using OpenCL. > For me (Ivybridge M GT2), everything that does immediately crashes with > > clinfo: > /home/rnpalmer/Debian/builds/stackbuild/beignet/backend/src/backend/gen_context.cpp:2259: > virtual void gbe::GenContext::emitUntypedReadA64Instruction(const > gbe::SelectionInstruction&): Assertion `0' failed. > Aborted > > and that assert(0) only gets replaced by a real implementation in gen8 > and above, not in Haswell (gen75). I’ll try again tomorrow and join the opencl debug log of darktable if needed. Bruno
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