pytorch

33017948 - Port ELU activation to Aten (#29275)

Port ELU activation to Aten (#29275) Summary: VitalyFedyunin, This PR is about port ELU activation to Aten: **Test script:** ``` import torch import torch.nn as nn import time torch.manual_seed(0) def _time(): if torch.cuda.is_available(): torch.cuda.synchronize() return time.time() device = "cpu" m = nn.ELU() if torch.cuda.is_available(): device = "cuda" m = m.cuda() #warm up for n in [100, 10000]: input = torch.randn(128, n, requires_grad=True, device=device) grad_output = torch.ones(128, n, device=device) for i in range(1000): output = m(input) output.backward(grad_output) for n in [100, 10000]: fwd_t = 0 bwd_t = 0 input = torch.randn(128, n, requires_grad=True, device=device) grad_output = torch.ones(128, n, device=device) for i in range(10000): t1 = _time() output = m(input) t2 = _time() output.backward(grad_output) t3 = _time() fwd_t = fwd_t + (t2 -t1) bwd_t = bwd_t + (t3 - t2) fwd_avg = fwd_t / 10000 * 1000 bwd_avg = bwd_t / 10000 * 1000 print("input size(128, %d) forward time is %.2f (ms); backwad avg time is %.2f (ms)." % (n, fwd_avg, bwd_avg)) ``` Test Device: CPU: skx-8180, GPU: Tesla P40. Perfromance: Before: ``` GPU: input size(128, 100) forward time is 0.04 (ms); backwad avg time is 0.09 (ms). input size(128, 10000) forward time is 0.06 (ms); backwad avg time is 0.17 (ms). CPU: OMP_NUM_THREADS=56 input size(128, 100) forward time is 0.28 (ms); backwad avg time is 0.18 (ms). input size(128, 10000) forward time is 23.53 (ms); backwad avg time is 14.46 (ms). OMP_NUM_THREADS=1 input size(128, 100) forward time is 0.16 (ms); backwad avg time is 0.08 (ms). input size(128, 10000) forward time is 15.53 (ms); backwad avg time is 6.60 (ms). ``` After: ``` GPU: input size(128, 100) forward time is 0.05 (ms); backwad avg time is 0.11 (ms). input size(128, 10000) forward time is 0.06 (ms); backwad avg time is 0.17 (ms). CPU: OMP_NUM_THREADS=56 input size(128, 100) forward time is 0.24 (ms); backwad avg time is 0.17 (ms). input size(128, 10000) forward time is 0.73 (ms); backwad avg time is 1.11 (ms). OMP_NUM_THREADS=1 input size(128, 100) forward time is 0.15 (ms); backwad avg time is 0.07 (ms). input size(128, 10000) forward time is 14.40 (ms); backwad avg time is 6.00 (ms). ``` How to set the numbers of thread? using following script: ``` num_threads=$1 script=$2 last_core=`expr $num_threads - 1` echo "using $num_threads OMP threads" echo "bind cores to 0~$last_core" export OMP_NUM_THREADS=$num_threads export KMP_AFFINITY=granularity=fine,compact,1,0 numactl --physcpubind=0-$last_core --membind=0 python $script ``` and run .**/run.sh num_threads test.py**. Pull Request resolved: https://github.com/pytorch/pytorch/pull/29275 Differential Revision: D18587389 Pulled By: VitalyFedyunin fbshipit-source-id: bea8f3f006c6893090f863d047c01886d195437a