diff options
Diffstat (limited to 'src/gpgpu-sim/shader.cc')
| -rw-r--r-- | src/gpgpu-sim/shader.cc | 68 |
1 files changed, 40 insertions, 28 deletions
diff --git a/src/gpgpu-sim/shader.cc b/src/gpgpu-sim/shader.cc index c7738c0..16bc770 100644 --- a/src/gpgpu-sim/shader.cc +++ b/src/gpgpu-sim/shader.cc @@ -3082,36 +3082,48 @@ unsigned int shader_core_config::max_cta(const kernel_info_t &k) const { abort(); } - if (adaptive_volta_cache_config && !k.volta_cache_config_set) { - // For Volta, we assign the remaining shared memory to L1 cache - // For more info, see - // https://docs.nvidia.com/cuda/cuda-c-programming-guide/index.html#shared-memory-7-x - unsigned total_shmed = kernel_info->smem * result; - assert(total_shmed >= 0 && total_shmed <= gpgpu_shmem_size); - assert(gpgpu_shmem_size == 98304); // Volta has 96 KB shared - assert(m_L1D_config.get_nset() == 4); // Volta L1 has four sets - if (total_shmed < gpgpu_shmem_size) { - if (total_shmed == 0) - m_L1D_config.set_assoc(256); // L1 is 128KB ans shd=0 - else if (total_shmed > 0 && total_shmed <= 8192) - m_L1D_config.set_assoc(240); // L1 is 120KB ans shd=8KB - else if (total_shmed > 8192 && total_shmed <= 16384) - m_L1D_config.set_assoc(224); // L1 is 112KB ans shd=16KB - else if (total_shmed > 16384 && total_shmed <= 32768) - m_L1D_config.set_assoc(192); // L1 is 96KB ans shd=32KB - else if (total_shmed > 32768 && total_shmed <= 65536) - m_L1D_config.set_assoc(128); // L1 is 64KB ans shd=64KB - else if (total_shmed > 65536 && total_shmed <= gpgpu_shmem_size) - m_L1D_config.set_assoc(64); // L1 is 32KB and shd=96KB - else - assert(0); + if(adaptive_cache_config && !k.cache_config_set) { + //For more info about adaptive cache, see https://docs.nvidia.com/cuda/cuda-c-programming-guide/index.html#shared-memory-7-x + unsigned total_shmed = kernel_info->smem * result; + assert(total_shmed >=0 && total_shmed <= gpgpu_shmem_size); + //assert(gpgpu_shmem_size == 98304); //Volta has 96 KB shared + //assert(m_L1D_config.get_nset() == 4); //Volta L1 has four sets + if(total_shmed < gpgpu_shmem_size){ + switch (adaptive_cache_config) { + case FIXED: + break; + case VOLTA: { + //For Volta, we assign the remaining shared memory to L1 cache + //For more info about adaptive cache, see https://docs.nvidia.com/cuda/cuda-c-programming-guide/index.html#shared-memory-7-x + assert(gpgpu_shmem_size == 98304); //Volta has 96 KB shared - printf("GPGPU-Sim: Reconfigure L1 cache in Volta Archi to %uKB\n", - m_L1D_config.get_total_size_inKB()); - } + //To Do: make it flexible and not tuned to 9KB share memory + unsigned max_assoc = m_L1D_config.get_max_assoc(); + if(total_shmed == 0) + m_L1D_config.set_assoc(max_assoc); //L1 is 128KB and shd=0 + else if(total_shmed > 0 && total_shmed <= 8192) + m_L1D_config.set_assoc(0.9375 * max_assoc); //L1 is 120KB and shd=8KB + else if(total_shmed > 8192 && total_shmed <= 16384) + m_L1D_config.set_assoc(0.875 * max_assoc); //L1 is 112KB and shd=16KB + else if(total_shmed > 16384 && total_shmed <= 32768) + m_L1D_config.set_assoc(0.75 * max_assoc); //L1 is 96KB and shd=32KB + else if(total_shmed > 32768 && total_shmed <= 65536) + m_L1D_config.set_assoc(0.5 * max_assoc); //L1 is 64KB and shd=64KB + else if(total_shmed > 65536 && total_shmed <= gpgpu_shmem_size) + m_L1D_config.set_assoc(0.25 * max_assoc); //L1 is 32KB and shd=96KB + else + assert(0); + break; + } + default: + assert(0); + } - k.volta_cache_config_set = true; - } + printf ("GPGPU-Sim: Reconfigure L1 cache to %uKB\n", m_L1D_config.get_total_size_inKB()); + } + + k.cache_config_set = true; + } return result; } |