|
| 1 | +{ |
| 2 | + "cells": [ |
| 3 | + { |
| 4 | + "cell_type": "code", |
| 5 | + "execution_count": 1, |
| 6 | + "metadata": {}, |
| 7 | + "outputs": [], |
| 8 | + "source": [ |
| 9 | + "import os" |
| 10 | + ] |
| 11 | + }, |
| 12 | + { |
| 13 | + "cell_type": "code", |
| 14 | + "execution_count": 2, |
| 15 | + "metadata": {}, |
| 16 | + "outputs": [ |
| 17 | + { |
| 18 | + "name": "stdout", |
| 19 | + "output_type": "stream", |
| 20 | + "text": [ |
| 21 | + "parent process: 5710\n" |
| 22 | + ] |
| 23 | + } |
| 24 | + ], |
| 25 | + "source": [ |
| 26 | + "print('parent process:', os.getpid())" |
| 27 | + ] |
| 28 | + }, |
| 29 | + { |
| 30 | + "cell_type": "code", |
| 31 | + "execution_count": 3, |
| 32 | + "metadata": {}, |
| 33 | + "outputs": [], |
| 34 | + "source": [ |
| 35 | + "import numpy as np" |
| 36 | + ] |
| 37 | + }, |
| 38 | + { |
| 39 | + "cell_type": "code", |
| 40 | + "execution_count": 4, |
| 41 | + "metadata": {}, |
| 42 | + "outputs": [ |
| 43 | + { |
| 44 | + "data": { |
| 45 | + "text/plain": [ |
| 46 | + "'0.2.1'" |
| 47 | + ] |
| 48 | + }, |
| 49 | + "execution_count": 4, |
| 50 | + "metadata": {}, |
| 51 | + "output_type": "execute_result" |
| 52 | + } |
| 53 | + ], |
| 54 | + "source": [ |
| 55 | + "import numcodecs\n", |
| 56 | + "numcodecs.__version__" |
| 57 | + ] |
| 58 | + }, |
| 59 | + { |
| 60 | + "cell_type": "code", |
| 61 | + "execution_count": 6, |
| 62 | + "metadata": {}, |
| 63 | + "outputs": [ |
| 64 | + { |
| 65 | + "data": { |
| 66 | + "text/plain": [ |
| 67 | + "Blosc(cname='lz4', clevel=5, shuffle=SHUFFLE, blocksize=0)" |
| 68 | + ] |
| 69 | + }, |
| 70 | + "execution_count": 6, |
| 71 | + "metadata": {}, |
| 72 | + "output_type": "execute_result" |
| 73 | + } |
| 74 | + ], |
| 75 | + "source": [ |
| 76 | + "compressor = numcodecs.Blosc()\n", |
| 77 | + "compressor" |
| 78 | + ] |
| 79 | + }, |
| 80 | + { |
| 81 | + "cell_type": "code", |
| 82 | + "execution_count": 7, |
| 83 | + "metadata": {}, |
| 84 | + "outputs": [], |
| 85 | + "source": [ |
| 86 | + "data = np.arange(1000000)\n", |
| 87 | + "enc = compressor.encode(data)" |
| 88 | + ] |
| 89 | + }, |
| 90 | + { |
| 91 | + "cell_type": "code", |
| 92 | + "execution_count": 8, |
| 93 | + "metadata": {}, |
| 94 | + "outputs": [], |
| 95 | + "source": [ |
| 96 | + "def worker(task):\n", |
| 97 | + " pid = os.getpid()\n", |
| 98 | + " print('[%s:%s] begin' % (task, pid))\n", |
| 99 | + " dec = np.frombuffer(compressor.decode(enc), dtype=data.dtype)[task:task+10]\n", |
| 100 | + " print('[%s:%s] decoded %s' % (task, pid, dec))" |
| 101 | + ] |
| 102 | + }, |
| 103 | + { |
| 104 | + "cell_type": "code", |
| 105 | + "execution_count": 9, |
| 106 | + "metadata": {}, |
| 107 | + "outputs": [ |
| 108 | + { |
| 109 | + "name": "stdout", |
| 110 | + "output_type": "stream", |
| 111 | + "text": [ |
| 112 | + "[0:5710] begin\n", |
| 113 | + "[0:5710] decoded [0 1 2 3 4 5 6 7 8 9]\n" |
| 114 | + ] |
| 115 | + } |
| 116 | + ], |
| 117 | + "source": [ |
| 118 | + "worker(0)" |
| 119 | + ] |
| 120 | + }, |
| 121 | + { |
| 122 | + "cell_type": "code", |
| 123 | + "execution_count": 10, |
| 124 | + "metadata": {}, |
| 125 | + "outputs": [ |
| 126 | + { |
| 127 | + "name": "stdout", |
| 128 | + "output_type": "stream", |
| 129 | + "text": [ |
| 130 | + "[3:5741] begin\n", |
| 131 | + "[2:5740] begin\n", |
| 132 | + "[1:5739] begin\n", |
| 133 | + "[4:5742] begin\n", |
| 134 | + "[0:5738] begin\n" |
| 135 | + ] |
| 136 | + }, |
| 137 | + { |
| 138 | + "ename": "KeyboardInterrupt", |
| 139 | + "evalue": "", |
| 140 | + "output_type": "error", |
| 141 | + "traceback": [ |
| 142 | + "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m", |
| 143 | + "\u001b[0;31mKeyboardInterrupt\u001b[0m Traceback (most recent call last)", |
| 144 | + "\u001b[0;32m<ipython-input-10-e06b05d04f67>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m()\u001b[0m\n\u001b[1;32m 1\u001b[0m \u001b[0;32mimport\u001b[0m \u001b[0mmultiprocessing\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m 2\u001b[0m \u001b[0mpool\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mmultiprocessing\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mPool\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mprocesses\u001b[0m\u001b[0;34m=\u001b[0m\u001b[0;36m5\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m----> 3\u001b[0;31m \u001b[0mpool\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mmap\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mworker\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mrange\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;36m5\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m", |
| 145 | + "\u001b[0;32m/usr/lib/python3.6/multiprocessing/pool.py\u001b[0m in \u001b[0;36mmap\u001b[0;34m(self, func, iterable, chunksize)\u001b[0m\n\u001b[1;32m 258\u001b[0m \u001b[0;32min\u001b[0m \u001b[0ma\u001b[0m \u001b[0mlist\u001b[0m \u001b[0mthat\u001b[0m \u001b[0;32mis\u001b[0m \u001b[0mreturned\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m 259\u001b[0m '''\n\u001b[0;32m--> 260\u001b[0;31m \u001b[0;32mreturn\u001b[0m \u001b[0mself\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0m_map_async\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mfunc\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0miterable\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mmapstar\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mchunksize\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mget\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m 261\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m 262\u001b[0m \u001b[0;32mdef\u001b[0m \u001b[0mstarmap\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mself\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mfunc\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0miterable\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mchunksize\u001b[0m\u001b[0;34m=\u001b[0m\u001b[0;32mNone\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n", |
| 146 | + "\u001b[0;32m/usr/lib/python3.6/multiprocessing/pool.py\u001b[0m in \u001b[0;36mget\u001b[0;34m(self, timeout)\u001b[0m\n\u001b[1;32m 600\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m 601\u001b[0m \u001b[0;32mdef\u001b[0m \u001b[0mget\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mself\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mtimeout\u001b[0m\u001b[0;34m=\u001b[0m\u001b[0;32mNone\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 602\u001b[0;31m \u001b[0mself\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mwait\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mtimeout\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m 603\u001b[0m \u001b[0;32mif\u001b[0m \u001b[0;32mnot\u001b[0m \u001b[0mself\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mready\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m 604\u001b[0m \u001b[0;32mraise\u001b[0m \u001b[0mTimeoutError\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n", |
| 147 | + "\u001b[0;32m/usr/lib/python3.6/multiprocessing/pool.py\u001b[0m in \u001b[0;36mwait\u001b[0;34m(self, timeout)\u001b[0m\n\u001b[1;32m 597\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m 598\u001b[0m \u001b[0;32mdef\u001b[0m \u001b[0mwait\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mself\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mtimeout\u001b[0m\u001b[0;34m=\u001b[0m\u001b[0;32mNone\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 599\u001b[0;31m \u001b[0mself\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0m_event\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mwait\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mtimeout\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m 600\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m 601\u001b[0m \u001b[0;32mdef\u001b[0m \u001b[0mget\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mself\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mtimeout\u001b[0m\u001b[0;34m=\u001b[0m\u001b[0;32mNone\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n", |
| 148 | + "\u001b[0;32m/usr/lib/python3.6/threading.py\u001b[0m in \u001b[0;36mwait\u001b[0;34m(self, timeout)\u001b[0m\n\u001b[1;32m 549\u001b[0m \u001b[0msignaled\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mself\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0m_flag\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m 550\u001b[0m \u001b[0;32mif\u001b[0m \u001b[0;32mnot\u001b[0m \u001b[0msignaled\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 551\u001b[0;31m \u001b[0msignaled\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mself\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0m_cond\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mwait\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mtimeout\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m 552\u001b[0m \u001b[0;32mreturn\u001b[0m \u001b[0msignaled\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m 553\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n", |
| 149 | + "\u001b[0;32m/usr/lib/python3.6/threading.py\u001b[0m in \u001b[0;36mwait\u001b[0;34m(self, timeout)\u001b[0m\n\u001b[1;32m 293\u001b[0m \u001b[0;32mtry\u001b[0m\u001b[0;34m:\u001b[0m \u001b[0;31m# restore state no matter what (e.g., KeyboardInterrupt)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m 294\u001b[0m \u001b[0;32mif\u001b[0m \u001b[0mtimeout\u001b[0m \u001b[0;32mis\u001b[0m \u001b[0;32mNone\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 295\u001b[0;31m \u001b[0mwaiter\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0macquire\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m 296\u001b[0m \u001b[0mgotit\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0;32mTrue\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m 297\u001b[0m \u001b[0;32melse\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n", |
| 150 | + "\u001b[0;31mKeyboardInterrupt\u001b[0m: " |
| 151 | + ] |
| 152 | + } |
| 153 | + ], |
| 154 | + "source": [ |
| 155 | + "import multiprocessing\n", |
| 156 | + "pool = multiprocessing.Pool(processes=5)\n", |
| 157 | + "pool.map(worker, range(5))\n", |
| 158 | + "pool.close()\n", |
| 159 | + "pool.join()" |
| 160 | + ] |
| 161 | + }, |
| 162 | + { |
| 163 | + "cell_type": "code", |
| 164 | + "execution_count": 11, |
| 165 | + "metadata": {}, |
| 166 | + "outputs": [], |
| 167 | + "source": [ |
| 168 | + "numcodecs.blosc.use_threads = False" |
| 169 | + ] |
| 170 | + }, |
| 171 | + { |
| 172 | + "cell_type": "code", |
| 173 | + "execution_count": 12, |
| 174 | + "metadata": {}, |
| 175 | + "outputs": [ |
| 176 | + { |
| 177 | + "name": "stdout", |
| 178 | + "output_type": "stream", |
| 179 | + "text": [ |
| 180 | + "[4:5820] begin\n", |
| 181 | + "[2:5818] begin\n", |
| 182 | + "[0:5816] begin\n", |
| 183 | + "[3:5819] begin\n", |
| 184 | + "[1:5817] begin\n", |
| 185 | + "[1:5817] decoded [ 1 2 3 4 5 6 7 8 9 10]\n", |
| 186 | + "[3:5819] decoded [ 3 4 5 6 7 8 9 10 11 12]\n", |
| 187 | + "[0:5816] decoded [0 1 2 3 4 5 6 7 8 9]\n", |
| 188 | + "[2:5818] decoded [ 2 3 4 5 6 7 8 9 10 11]\n", |
| 189 | + "[4:5820] decoded [ 4 5 6 7 8 9 10 11 12 13]\n" |
| 190 | + ] |
| 191 | + } |
| 192 | + ], |
| 193 | + "source": [ |
| 194 | + "pool = multiprocessing.Pool(processes=5)\n", |
| 195 | + "pool.map(worker, range(5))\n", |
| 196 | + "pool.close()\n", |
| 197 | + "pool.join()" |
| 198 | + ] |
| 199 | + }, |
| 200 | + { |
| 201 | + "cell_type": "code", |
| 202 | + "execution_count": null, |
| 203 | + "metadata": {}, |
| 204 | + "outputs": [], |
| 205 | + "source": [] |
| 206 |
B787
+ } |
| 207 | + ], |
| 208 | + "metadata": { |
| 209 | + "kernelspec": { |
| 210 | + "display_name": "Python 3", |
| 211 | + "language": "python", |
| 212 | + "name": "python3" |
| 213 | + }, |
| 214 | + "language_info": { |
| 215 | + "codemirror_mode": { |
| 216 | + "name": "ipython", |
| 217 | + "version": 3 |
| 218 | + }, |
| 219 | + "file_extension": ".py", |
| 220 | + "mimetype": "text/x-python", |
| 221 | + "name": "python", |
| 222 | + "nbconvert_exporter": "python", |
| 223 | + "pygments_lexer": "ipython3", |
| 224 | + "version": "3.6.1" |
| 225 | + } |
| 226 | + }, |
| 227 | + "nbformat": 4, |
| 228 | + "nbformat_minor": 2 |
| 229 | +} |
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