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GPU Torch Benchmark
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| -- Max Jaderberg 4/9/13 | |
| -- GPU Effectiveness test | |
| require 'torch' | |
| require 'sys' | |
| require 'nn' | |
| require 'xlua' | |
| cmd = torch.CmdLine() | |
| cmd:text() | |
| cmd:text('GPU Benchmark. Max Jaderberg.') | |
| cmd:text() | |
| cmd:text('Options:') | |
| cmd:option('-size', 24, 'size of images') | |
| cmd:option('-N', 1000, 'number of images') | |
| cmd:option('-threads', 2, 'number of threads') | |
| cmd:text() | |
| opt = cmd:parse(arg or {}) | |
| torch.setnumthreads(opt.threads) | |
| torch.setdefaulttensortype("torch.FloatTensor") | |
| -- Input size | |
| sz = opt.size | |
| finalsize = (sz - 4)/2 --for a 5x5 filter | |
| Ntest = opt.N | |
| -- Test input | |
| x = torch.rand(Ntest, 3, sz, sz) | |
| -- Simple network | |
| model = nn.Sequential() | |
| model:add(nn.SpatialConvolution(3, 64, 5, 5)) | |
| model:add(nn.Tanh()) | |
| model:add(nn.SpatialLPPooling(64, 2, 2, 2, 2, 2)) | |
| model:add(nn.Reshape(64*finalsize*finalsize)) | |
| model:add(nn.Linear(64*finalsize*finalsize, 128)) | |
| model:add(nn.Tanh()) | |
| model:add(nn.Linear(128, 2)) | |
| model:add(nn.Tanh()) | |
| criterion = nn.MSECriterion() | |
| -- Test ouput | |
| y = torch.rand(Ntest, 2) | |
| -- Test routine | |
| local runtest = function() | |
| print('==> Type is '..x:type()) | |
| for i = 1,x:size(1) do | |
| xlua.progress(i, x:size(1)) | |
| local yp = model:forward(x[i]) | |
| local err = criterion:forward(yp, y[i]) | |
| local df_do = criterion:backward(yp, y[i]) | |
| model:backward(x[i], df_do) | |
| end | |
| end | |
| -- CPU TEST | |
| cputime0 = sys.clock() | |
| runtest() | |
| cputime1 = sys.clock() | |
| cputime = cputime1 - cputime0 | |
| print('CPU Time: '.. (cputime*1000) .. 'ms') | |
| -- GPU TEST | |
| require 'cunn' | |
| x = x:cuda() | |
| y = y:cuda() | |
| model:cuda() | |
| criterion:cuda() | |
| gputime0 = sys.clock() | |
| runtest() | |
| gputime1 = sys.clock() | |
| gputime = gputime1 - gputime0 | |
| print('GPU Time: '.. (gputime*1000) .. 'ms') | |
| print('------------------') | |
| print('GPU speedup: '..cputime/gputime..'x') | |
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