From bbd7c733ba4bdbce0f67ff41791e6ea9ea94e3bd Mon Sep 17 00:00:00 2001
From: TYLER CARAZA-HARTER <tharter@cs544-tharter.cs.wisc.edu>
Date: Fri, 14 Feb 2025 10:08:07 -0600
Subject: [PATCH] lec 1 demo
---
lec/11-threads/code/lec1.ipynb | 163 +++++++++++++++++++++++++++++++++
1 file changed, 163 insertions(+)
create mode 100644 lec/11-threads/code/lec1.ipynb
diff --git a/lec/11-threads/code/lec1.ipynb b/lec/11-threads/code/lec1.ipynb
new file mode 100644
index 0000000..ee90ef9
--- /dev/null
+++ b/lec/11-threads/code/lec1.ipynb
@@ -0,0 +1,163 @@
+{
+ "cells": [
+ {
+ "cell_type": "code",
+ "execution_count": 14,
+ "id": "3b8d1ed9-9568-473e-bfa2-3b08f9e4587f",
+ "metadata": {},
+ "outputs": [
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "text": [
+ "hi from thread ID:hi from main thread, ID: 65\n",
+ " 125\n"
+ ]
+ }
+ ],
+ "source": [
+ "import threading\n",
+ "import time\n",
+ "\n",
+ "def task():\n",
+ " print(\"hi from thread ID:\", threading.get_native_id())\n",
+ "\n",
+ "t = threading.Thread(target=task)\n",
+ "t.start()\n",
+ "print(\"hi from main thread, ID:\", threading.get_native_id())"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "execution_count": 28,
+ "id": "651dc205-4fdc-4054-be28-b19e2e798017",
+ "metadata": {},
+ "outputs": [
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "text": [
+ "1000000\n"
+ ]
+ }
+ ],
+ "source": [
+ "total = 0\n",
+ "\n",
+ "def task(count):\n",
+ " global total\n",
+ " for i in range(count):\n",
+ " total += 1\n",
+ "\n",
+ "t = threading.Thread(target=task, args=[1_000_000])\n",
+ "t.start()\n",
+ "t.join() # wait until it exits\n",
+ "print(total)"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "execution_count": 23,
+ "id": "5eb4a3e1-decf-4352-b61c-b10e53aec763",
+ "metadata": {},
+ "outputs": [
+ {
+ "data": {
+ "text/plain": [
+ "1000"
+ ]
+ },
+ "execution_count": 23,
+ "metadata": {},
+ "output_type": "execute_result"
+ }
+ ],
+ "source": [
+ "total"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "execution_count": 33,
+ "id": "ceeb7904-ff2c-424c-bf7c-724d1b285e3b",
+ "metadata": {},
+ "outputs": [
+ {
+ "data": {
+ "text/plain": [
+ "1084635"
+ ]
+ },
+ "execution_count": 33,
+ "metadata": {},
+ "output_type": "execute_result"
+ }
+ ],
+ "source": [
+ "total = 0\n",
+ "\n",
+ "def task(count):\n",
+ " global total\n",
+ " for i in range(count):\n",
+ " total += 1\n",
+ "\n",
+ "t1 = threading.Thread(target=task, args=[1_000_000])\n",
+ "t1.start()\n",
+ "\n",
+ "t2 = threading.Thread(target=task, args=[1_000_000])\n",
+ "t2.start()\n",
+ "\n",
+ "t1.join()\n",
+ "t2.join()\n",
+ "\n",
+ "total"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "execution_count": 36,
+ "id": "48a5226c-6d63-4062-a2be-f7dd890c4dc1",
+ "metadata": {},
+ "outputs": [
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "text": [
+ " 0 RESUME 0\n",
+ "\n",
+ " 1 LOAD_NAME 0 (total)\n",
+ " LOAD_CONST 0 (1)\n",
+ " BINARY_OP 13 (+=)\n",
+ " STORE_NAME 0 (total)\n",
+ " RETURN_CONST 1 (None)\n"
+ ]
+ }
+ ],
+ "source": [
+ "import dis\n",
+ "dis.dis(\"total += 1\")"
+ ]
+ }
+ ],
+ "metadata": {
+ "kernelspec": {
+ "display_name": "Python 3.13-nogil",
+ "language": "python",
+ "name": "python3.13-nogil"
+ },
+ "language_info": {
+ "codemirror_mode": {
+ "name": "ipython",
+ "version": 3
+ },
+ "file_extension": ".py",
+ "mimetype": "text/x-python",
+ "name": "python",
+ "nbconvert_exporter": "python",
+ "pygments_lexer": "ipython3",
+ "version": "3.13.2"
+ }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}
--
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