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diff --git a/RELEASE.md b/RELEASE.md index e63971ef93..af6440acef 100644 --- a/RELEASE.md +++ b/RELEASE.md @@ -1,16 +1,39 @@ # Release 1.5.0 ## Breaking Changes -* Prebuilt binaries are now built against CUDA 9 and cuDNN 7. +* Prebuilt binaries are now built against CUDA 9.0 and cuDNN 7. +* Our Linux binaries are built using ubuntu 16 containers, potentially + introducing glibc incompatibility issues with ubuntu 14. * Starting from 1.6 release, our prebuilt binaries will use AVX instructions. This may break TF on older CPUs. +## Known Bugs +* Using XLA:GPU with CUDA 9 and CUDA 9.1 results in garbage results and/or + `CUDA_ILLEGAL_ADDRESS` failures. + + Google discovered in mid-December 2017 that the PTX-to-SASS compiler in CUDA 9 + and CUDA 9.1 sometimes does not properly compute the carry bit when + decomposing 64-bit address calculations with large offsets (e.g. `load [x + + large_constant]`) into 32-bit arithmetic in SASS. + + As a result, these versions of `ptxas` miscompile most XLA programs which use + more than 4GB of temp memory. This results in garbage results and/or + `CUDA_ERROR_ILLEGAL_ADDRESS` failures. + + A fix in CUDA 9.1.121 is expected in late February 2018. We do not expect a + fix for CUDA 9.0.x. Until the fix is available, the only workaround is to + [downgrade](https://developer.nvidia.com/cuda-toolkit-archive) to CUDA 8.0.x + or disable XLA:GPU. + + TensorFlow will print a warning if you use XLA:GPU with a known-bad version of + CUDA; see e00ba24c4038e7644da417ddc639169b6ea59122. + ## Major Features And Improvements * [Eager execution](https://github.com/tensorflow/tensorflow/tree/r1.5/tensorflow/contrib/eager) preview version is now available. * [TensorFlow Lite](https://github.com/tensorflow/tensorflow/tree/r1.5/tensorflow/contrib/lite) dev preview is now available. -* CUDA 9 and cuDNN 7 support. +* CUDA 9.0 and cuDNN 7 support. * Accelerated Linear Algebra (XLA): * Add `complex64` support to XLA compiler. * `bfloat` support is now added to XLA infrastructure. |