KernelGen - GPU Technology Conference

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Conclusions.1 KernelGen project implemented a full compiler prototype to produce parallel GPU kernelsfrom unmodified CPU source code2 C and Fortran languages support is widely tested, focusing mostly on Fortran3 Performance of GPU kernels generated by KernelGen is 0.5x-4x in comparison to newestcommercial PGI OpenACC compiler4 KernelGen eases porting of applications on GPU by means of supporting many featuresmissing in OpenACC5 GPU-directed execution model allows seamless transition between CPU-MPI and GPU-MPIversions of application6 KernelGen is based on freeware and mostly open-source technologies70 / 75
How to test?.. Note you will need SM_20 or newer NVIDIA GPU and CUDA 5.0 driver installedCompile KernelGen for your target system, as described in guideUse KernelGen to compile a program with computational loops:$ source ~/rpmbuild/CHROOT/opt/kernelgen/usr/bin/kernelgen-vars.sh$ kernelgen-gfortran test.f90 -o testDeploy the code on GPU and check out the verbose reports about launched GPU kernels:$ kernelgen_runmode=1 ./test Compare performance and result to the original CPU version:$ ./test Encountered an issue? Please file it into our public bug tracker71 / 75
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Simple example: Fortran.Compile the
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Simple example: C.Compile the Fortr
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OpenACC: no external calls.OpenACC
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KernelGen: and external static libr
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KernelGen: smart pointers tracking.
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KernelGen: smart pointers tracking.
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Other nice features..Comfortable ac
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Parallelizing Fortran array-wise co
Page 20 and 21: OpenACC: no pointer arithmetics.Com
Page 24 and 25: absolute speedup against PGI versio
Page 26 and 27: Performance factors: compute grid.2
Page 28 and 29: Performance factors: code optimizat
Page 30 and 31: Performance factors: code generatio
Page 32 and 33: absolute speedup against CPU versio
Page 34 and 35: Parallelism detection.KernelGen ana
Page 36 and 37: Cooperation with MPI..KernelGen nat
Page 38 and 39: KernelGen compiler pipeline.KernelG
Page 40 and 41: GPU-directed execution.GPUidleseria
Page 42 and 43: KernelGen execution workflow.Scenar
Page 62 and 63: Code generation brief walk-through.
Page 72 and 73: Testing COSMO and WRF.KernelGen is
Page 74 and 75: Collaboration proposal.KernelGen te
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KernelGen - GPU Technology Conference

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