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author | Benoit Steiner <benoit.steiner.goog@gmail.com> | 2016-04-14 21:25:06 -0700 |
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committer | Benoit Steiner <benoit.steiner.goog@gmail.com> | 2016-04-14 21:25:06 -0700 |
commit | a62e9246562970f384f316c66d17c6ed4bd2a55a (patch) | |
tree | a03410839d3852c7194720518232809fe195f98d | |
parent | 18e6f67426139e1bba34c49ed0935b7cc1e1f379 (diff) |
Added ability to access the cache sizes from the tensor devices
3 files changed, 39 insertions, 0 deletions
diff --git a/Eigen/src/Core/products/GeneralBlockPanelKernel.h b/Eigen/src/Core/products/GeneralBlockPanelKernel.h index 54e118395..267ac1de9 100644 --- a/Eigen/src/Core/products/GeneralBlockPanelKernel.h +++ b/Eigen/src/Core/products/GeneralBlockPanelKernel.h @@ -2224,6 +2224,16 @@ inline std::ptrdiff_t l2CacheSize() return l2; } +/** \returns the currently set level 3 cpu cache size (in bytes) used to estimate the ideal blocking size paramete\ +rs. +* \sa setCpuCacheSize */ +inline std::ptrdiff_t l3CacheSize() +{ + std::ptrdiff_t l1, l2, l3; + internal::manage_caching_sizes(GetAction, &l1, &l2, &l3); + return l3; +} + /** Set the cpu L1 and L2 cache sizes (in bytes). * These values are use to adjust the size of the blocks * for the algorithms working per blocks. diff --git a/unsupported/Eigen/CXX11/src/Tensor/TensorDeviceDefault.h b/unsupported/Eigen/CXX11/src/Tensor/TensorDeviceDefault.h index 267f6f8e3..9d141395b 100644 --- a/unsupported/Eigen/CXX11/src/Tensor/TensorDeviceDefault.h +++ b/unsupported/Eigen/CXX11/src/Tensor/TensorDeviceDefault.h @@ -44,6 +44,26 @@ struct DefaultDevice { #endif } + EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE size_t firstLevelCacheSize() const { +#ifndef __CUDA_ARCH__ + // Running on the host CPU + return l1CacheSize(); +#else + // Running on a CUDA device, return the amount of shared memory available. + return 48*1024; +#endif + } + + EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE size_t lastLevelCacheSize() const { +#ifndef __CUDA_ARCH__ + // Running single threaded on the host CPU + return l3CacheSize(); +#else + // Running on a CUDA device + return firstLevelCacheSize(); +#endif + } + EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE int majorDeviceVersion() const { #ifndef __CUDA_ARCH__ // Running single threaded on the host CPU diff --git a/unsupported/Eigen/CXX11/src/Tensor/TensorDeviceThreadPool.h b/unsupported/Eigen/CXX11/src/Tensor/TensorDeviceThreadPool.h index 6da16985f..41918eb19 100644 --- a/unsupported/Eigen/CXX11/src/Tensor/TensorDeviceThreadPool.h +++ b/unsupported/Eigen/CXX11/src/Tensor/TensorDeviceThreadPool.h @@ -128,6 +128,15 @@ struct ThreadPoolDevice { return num_threads_; } + EIGEN_STRONG_INLINE size_t firstLevelCacheSize() const { + return l1CacheSize(); + } + + EIGEN_STRONG_INLINE size_t lastLevelCacheSize() const { + // The l3 cache size is shared between all the cores. + return l3CacheSize() / num_threads_; + } + EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE int majorDeviceVersion() const { // Should return an enum that encodes the ISA supported by the CPU return 1; |