diff options
| author | Tim Rogers <[email protected]> | 2019-05-13 19:42:43 -0400 |
|---|---|---|
| committer | GitHub <[email protected]> | 2019-05-13 19:42:43 -0400 |
| commit | cbb929b6f15f63f0b104e2acac7a17f02c0208fe (patch) | |
| tree | ed2bf825d27848c818a9293075cf9b9d73a26864 /src/gpgpu-sim/addrdec.cc | |
| parent | f507979bcf0f14d1e5843c9b08613d6b0a4bb7a2 (diff) | |
| parent | 059dabc1af44b8eb60f0cacc8d5c2d06f1e85a00 (diff) | |
Merge pull request #118 from mkhairy/dev
Integrating Mahmoud's changes that improve simulation speed by 2-3x.
Also includes a change that mitigates memory channel conflicts by using a random hashing function.
Diffstat (limited to 'src/gpgpu-sim/addrdec.cc')
| -rw-r--r-- | src/gpgpu-sim/addrdec.cc | 29 |
1 files changed, 27 insertions, 2 deletions
diff --git a/src/gpgpu-sim/addrdec.cc b/src/gpgpu-sim/addrdec.cc index 8651869..ca88ec9 100644 --- a/src/gpgpu-sim/addrdec.cc +++ b/src/gpgpu-sim/addrdec.cc @@ -165,6 +165,27 @@ void linear_to_raw_address_translation::addrdec_tlx(new_addr_type addr, addrdec_ 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 @@ -175,9 +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) @@ -396,6 +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" |