From 26a93cb38077810d17dfb701c58eebbf2515fe25 Mon Sep 17 00:00:00 2001
From: TYLER CARAZA-HARTER <tharter@cs544-tharter.cs.wisc.edu>
Date: Fri, 14 Feb 2025 13:55:06 -0600
Subject: [PATCH] lec 2 demo
---
lec/11-threads/code/lec2.ipynb | 173 +++++++++++++++++++++++++++++++++
1 file changed, 173 insertions(+)
create mode 100644 lec/11-threads/code/lec2.ipynb
diff --git a/lec/11-threads/code/lec2.ipynb b/lec/11-threads/code/lec2.ipynb
new file mode 100644
index 0000000..1abbbac
--- /dev/null
+++ b/lec/11-threads/code/lec2.ipynb
@@ -0,0 +1,173 @@
+{
+ "cells": [
+ {
+ "cell_type": "code",
+ "execution_count": 1,
+ "id": "de014d74-4685-4f16-85fd-f571fd5a91db",
+ "metadata": {},
+ "outputs": [],
+ "source": [
+ "import threading"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "execution_count": 2,
+ "id": "af3da760-5f6e-40c7-94cd-b505abe59012",
+ "metadata": {},
+ "outputs": [
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "text": [
+ "hello from thread ID:hello from main thread, with ID: 589\n",
+ " 602\n"
+ ]
+ }
+ ],
+ "source": [
+ "def task():\n",
+ " print(\"hello from thread ID:\", threading.get_native_id())\n",
+ "\n",
+ "#task()\n",
+ "t = threading.Thread(target=task)\n",
+ "t.start()\n",
+ "print(\"hello from main thread, with ID:\", threading.get_native_id())"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "execution_count": 3,
+ "id": "3dd19fcb-2c4a-4b26-b72f-3b87bd8e5bb5",
+ "metadata": {},
+ "outputs": [
+ {
+ "data": {
+ "text/plain": [
+ "1000000"
+ ]
+ },
+ "execution_count": 3,
+ "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",
+ "t = threading.Thread(target=task, args=[1_000_000])\n",
+ "t.start()\n",
+ "t.join() # wait until the thread is done before we continue\n",
+ "total"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "execution_count": 4,
+ "id": "de6ce736-5bdf-42b9-b98c-afee738b8f94",
+ "metadata": {},
+ "outputs": [
+ {
+ "data": {
+ "text/plain": [
+ "1000000"
+ ]
+ },
+ "execution_count": 4,
+ "metadata": {},
+ "output_type": "execute_result"
+ }
+ ],
+ "source": [
+ "total"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "execution_count": 9,
+ "id": "b735264e-f27a-4d27-ba5f-4d6a1f53543e",
+ "metadata": {},
+ "outputs": [
+ {
+ "data": {
+ "text/plain": [
+ "1100428"
+ ]
+ },
+ "execution_count": 9,
+ "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",
+ "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": 11,
+ "id": "c3d4a396-1793-4504-b2ff-fb8b81ae48d5",
+ "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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