GPU Programming.ipynb

{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "!pip install numba<br>\n",
    "!conda install cudatoolkits"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [],
   "source": [
    "import numpy as np\n",
    "from timeit import default_timer as timer"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [],
   "source": [
    "def VectorAdd(a, b, c):\n",
    "    for i in range(a.size):\n",
    "        c[i] = a[i] + b[i]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "C = [2. 2. 2. ... 2. 2. 2.]\n",
      " This took 8.751310 seconds\n"
     ]
    }
   ],
   "source": [
    "N = 32000000 # Number of elements per array\n",
    "A = np.ones(N, dtype=np.float32)\n",
    "B = np.ones(N, dtype=np.float32)\n",
    "C = np.zeros(N, dtype=np.float32)\n",
    "\n",
    "start = timer()\n",
    "\n",
    "VectorAdd(A, B, C)\n",
    "vectoradd_time = timer() - start\n",
    "\n",
    "print(\"C = \" + str(C))\n",
    "print(\" This took %f seconds\" % vectoradd_time)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [],
   "source": [
    "from numba import vectorize,cuda\n",
    "\n",
    "@vectorize([\"float32(float32, float32)\"], target='cpu') # cuda for Nvidea drivers\n",
    "def VectorAdd_GPU(a, b):\n",
    "    return a + b"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "C = [2. 2. 2. ... 2. 2. 2.]\n",
      " This took 0.046694 seconds\n"
     ]
    }
   ],
   "source": [
    "N = 32000000 # Number of elements per array\n",
    "A = np.ones(N, dtype=np.float32)\n",
    "B = np.ones(N, dtype=np.float32)\n",
    "C = np.zeros(N, dtype=np.float32)\n",
    "\n",
    "start = timer()\n",
    "\n",
    "C = VectorAdd_GPU(A, B)\n",
    "vectoradd_time = timer() - start\n",
    "\n",
    "print(\"C = \" + str(C))\n",
    "print(\" This took %f seconds\" % vectoradd_time)"
   ]
  }
 ],
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