From dad9e2a5cfb0f1f49279a6d2746454dd32f6eb85 Mon Sep 17 00:00:00 2001 From: Wilson Fung Date: Mon, 18 Jun 2012 21:59:31 -0800 Subject: Fixed GDDR5 parameters in Fermi config: - Increased burst length to 8 and changed address mapping to reflect 16 banks as suggested by Jungrae. - Decreased the DRAM clock to 924MHz from 1848MHz. - Corrected CAS Latency and Write Latency in the timing constraints. - Added a new option 'dram_data_command_freq_ratio' to configure the frequency ratio between the DRAM data bus and command bus. [git-p4: depot-paths = "//depot/gpgpu_sim_research/fermi/distribution/": change = 13138] --- configs/Fermi/gpgpusim.config | 11 +++++++---- configs/QuadroFX5800/gpgpusim.config | 1 + 2 files changed, 8 insertions(+), 4 deletions(-) (limited to 'configs') diff --git a/configs/Fermi/gpgpusim.config b/configs/Fermi/gpgpusim.config index 1a63db1..1122bbe 100644 --- a/configs/Fermi/gpgpusim.config +++ b/configs/Fermi/gpgpusim.config @@ -12,7 +12,7 @@ #-gpgpu_clock_domains ::: # In Fermi, each pipeline has 16 execution units, so the Core clock needs to be divided # by 2. (GPGPU-Sim simulates a warp (32 threads) in a single cycle). 1400/2 = 700 --gpgpu_clock_domains 700.0:1400.0:700.0:1848.0 +-gpgpu_clock_domains 700.0:1400.0:700.0:924.0 # shader core pipeline config -gpgpu_shader_registers 32768 @@ -75,14 +75,17 @@ # for Fermi, bus width is 384bits, this is 8 bytes (4 bytes at each DRAM chip) per memory partition -gpgpu_n_mem_per_ctrlr 2 -gpgpu_dram_buswidth 4 --gpgpu_dram_burst_length 4 +-gpgpu_dram_burst_length 8 +-dram_data_command_freq_ratio 4 # GDDR5 is QDR -gpgpu_mem_address_mask 1 --gpgpu_mem_addr_mapping dramid@8;00000000.00000000.00000000.00000000.0000RRRR.RRRRRRRR.RRBBBCCC.CCCSSSSS +-gpgpu_mem_addr_mapping dramid@8;00000000.00000000.00000000.00000000.0000RRRR.RRRRRRRR.BBBBCCCC.CCSSSSSS # GDDR5 timing from hynix H5GQ1H24AFR # to disable bank groups, set nbkgrp to 1 and tCCDL and tRTPL to 0 # {nbk:tCCD:tRRD:tRCD:tRAS:tRP:tRC:CL:WL:tCDLR:tWR:nbkgrp:tCCDL:tRTPL} --gpgpu_dram_timing_opt 16:2:5:12:28:12:35:10:7:6:12:4:3:2 +# -gpgpu_dram_timing_opt nbk=16:CCD=2:RRD=6:RCD=12:RAS=28:RP=12:RC=40:CL=12: +# WL=4:CDLR=5:WR=12:nbkgrp=4:CCDL=3:RTPL=2 +-gpgpu_dram_timing_opt 16:2:6:12:28:12:40:12:4:5:12:4:3:2 # GDDR3 #-gpgpu_dram_timing_opt 8:2:8:12:25:10:35:10:7:6:11 diff --git a/configs/QuadroFX5800/gpgpusim.config b/configs/QuadroFX5800/gpgpusim.config index ad1b022..47d3a64 100644 --- a/configs/QuadroFX5800/gpgpusim.config +++ b/configs/QuadroFX5800/gpgpusim.config @@ -49,6 +49,7 @@ -gpgpu_n_mem_per_ctrlr 2 -gpgpu_dram_buswidth 4 -gpgpu_dram_burst_length 4 +-dram_data_command_freq_ratio 2 # GDDR3 is DDR -gpgpu_mem_address_mask 1 -gpgpu_mem_addr_mapping dramid@8;00000000.00000000.00000000.00000000.0000RRRR.RRRRRRRR.RRBBBCCC.CCCSSSSS # GDDR3 timing from Samsung K4J52324QH-HC12 @ 800MHz -- cgit v1.3