diff options
Diffstat (limited to 'src/gpgpu-sim/addrdec.cc')
| -rw-r--r-- | src/gpgpu-sim/addrdec.cc | 54 |
1 files changed, 51 insertions, 3 deletions
diff --git a/src/gpgpu-sim/addrdec.cc b/src/gpgpu-sim/addrdec.cc index cfd90ec..ca88ec9 100644 --- a/src/gpgpu-sim/addrdec.cc +++ b/src/gpgpu-sim/addrdec.cc @@ -111,11 +111,14 @@ void linear_to_raw_address_translation::addrdec_tlx(new_addr_type addr, addrdec_ //Do nothing break; case BITWISE_PERMUTATION: + { assert(!gap); tlx->chip = (tlx->chip) ^ (tlx->row & (m_n_channel-1)); assert(tlx->chip < m_n_channel); break; + } case IPOLY: + { /* * Set Indexing function from "Pseudo-randomly interleaved memory." * Rau, B. R et al. @@ -132,7 +135,7 @@ void linear_to_raw_address_translation::addrdec_tlx(new_addr_type addr, addrdec_ chip[0] = a[13]^a[12]^a[11]^a[10]^a[9]^a[6]^a[5]^a[3]^a[0]^chip[0]; chip[1] = a[14]^a[13]^a[12]^a[11]^a[10]^a[7]^a[6]^a[4]^a[1]^chip[1]; chip[2] = a[14]^a[10]^a[9]^a[8]^a[7]^a[6]^a[3]^a[2]^a[0]^chip[2]; - chip[3] = a[11]^a[10]^a[9]^a[8]^a[7]^a[4]^a[3]^a[1]^chip[3]; + chip[3] = a[11]^a[10]^a[9]^a[8]^a[7]^a[4]^a[3]^a[1]^chip[3]; chip[4] = a[12]^a[11]^a[10]^a[9]^a[8]^a[5]^a[4]^a[2]^chip[4]; tlx->chip = chip.to_ulong(); @@ -143,8 +146,49 @@ void linear_to_raw_address_translation::addrdec_tlx(new_addr_type addr, addrdec_ } assert(tlx->chip < m_n_channel); break; + } + case PAE: + { + //Page Address Entropy + //random selected bits from the page and bank bits + //similar to + //Liu, Yuxi, et al. "Get Out of the Valley: Power-Efficient Address Mapping for GPUs." ISCA 2018 + std::bitset<64> a(tlx->row); + std::bitset<5> chip(tlx->chip); + std::bitset<4> b(tlx->bk); + chip[0] = a[13]^a[10]^a[9]^a[5]^a[0]^b[3]^b[0]^chip[0]; + chip[1] = a[12]^a[11]^a[6]^a[1]^b[3]^b[2]^b[1]^chip[1]; + chip[2] = a[14]^a[9]^a[8]^a[7]^a[2]^b[1]^chip[2]; + chip[3] = a[11]^a[10]^a[8]^a[3]^b[2]^b[3]^chip[3]; + chip[4] = a[12]^a[9]^a[8]^a[5]^a[4]^b[1]^b[0]^chip[4]; + tlx->chip = chip.to_ulong(); + assert(tlx->chip < m_n_channel); + break; + } + case RANDOM: + { + new_addr_type chip_address = (addr>>ADDR_CHIP_S); + tr1_hash_map<new_addr_type,unsigned>::const_iterator got = address_random_interleaving.find (chip_address); + if ( got == address_random_interleaving.end() ) { + unsigned new_chip_id = rand() % (m_n_channel*m_n_sub_partition_in_channel); + address_random_interleaving[chip_address] = new_chip_id; + tlx->chip = new_chip_id/m_n_sub_partition_in_channel; + tlx->sub_partition = new_chip_id; + } + else { + unsigned new_chip_id = got->second; + tlx->chip = new_chip_id/m_n_sub_partition_in_channel; + tlx->sub_partition = new_chip_id; + } + + assert(tlx->chip < m_n_channel); + assert(tlx->sub_partition < m_n_channel*m_n_sub_partition_in_channel); + return; + break; + } case CUSTOM: /* No custom set function implemented */ + //Do you custom index here break; default: assert("\nUndefined set index function.\n" && 0); @@ -152,9 +196,9 @@ void linear_to_raw_address_translation::addrdec_tlx(new_addr_type addr, addrdec_ } // combine the chip address and the lower bits of DRAM bank address to form the subpartition ID - unsigned sub_partition_addr_mask = m_n_sub_partition_in_channel - 1; + unsigned sub_partition_addr_mask = m_n_sub_partition_in_channel - 1; tlx->sub_partition = tlx->chip * m_n_sub_partition_in_channel - + (tlx->bk & sub_partition_addr_mask); + + (tlx->bk & sub_partition_addr_mask); } void linear_to_raw_address_translation::addrdec_parseoption(const char *option) @@ -373,6 +417,10 @@ void linear_to_raw_address_translation::init(unsigned int n_channel, unsigned in if (run_test) { sweep_test(); } + + if(memory_partition_indexing == RANDOM) + srand (1); + } #include "../tr1_hash_map.h" |