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Changes after the lecture on Friday September 15th 2023

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Francesc Verdugo
2023-09-15 16:39:05 +02:00
parent 01c69ff310
commit f6a3a677b2
3 changed files with 565 additions and 57 deletions
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33
notebooks/julia_distributed.ipynb
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@@ -614,6 +614,27 @@
"take!(chnl)"
]
},
{
"cell_type": "markdown",
"id": "ff0da45d",
"metadata": {},
"source": [
"### This will not work!\n",
"\n",
"You really need remote channels to communicate different processes. Standard Channels would not work. For instance, the following code would block at the `take!`. Worker 4 will receive a different copy of the channel and will put values in it. The channel defined in the main process will remain empty and this will make the take! to block. \n",
"\n",
"```julia\n",
"chnl = Channel{Int}()\n",
"@spawnat 4 begin\n",
" for i in 1:5\n",
" put!(chnl,i)\n",
" end\n",
" close(chnl)\n",
"end\n",
"take!(chnl)\n",
"```"
]
},
{
"cell_type": "markdown",
"id": "1b3f8dcc",
@@ -769,7 +790,7 @@
"source": [
"\n",
"<div class=\"alert alert-block alert-success\">\n",
"<b>Question (Q1):</b> How many integers are transferred between master and worker? Including both directions. \n",
"<b>Question (NB3-Q1):</b> How many integers are transferred between master and worker? Including both directions. \n",
"</div>\n",
"\n",
"\n",
@@ -803,7 +824,7 @@
"metadata": {},
"source": [
"<div class=\"alert alert-block alert-success\">\n",
"<b>Question (Q2):</b> How many integers are transferred between master and worker? Including both directions. \n",
"<b>Question (NB3-Q2):</b> How many integers are transferred between master and worker? Including both directions. \n",
"</div>\n",
"\n",
"\n",
@@ -838,7 +859,7 @@
"source": [
"\n",
"<div class=\"alert alert-block alert-success\">\n",
"<b>Question (Q3):</b> Which value will be the value of `x` ? \n",
"<b>Question (NB3-Q3):</b> Which value will be the value of `x` ? \n",
"</div>\n"
]
},
@@ -862,7 +883,7 @@
"metadata": {},
"source": [
"<div class=\"alert alert-block alert-success\">\n",
"<b>Question (Q4):</b> Which value will be the value of `x` ? \n",
"<b>Question (NB3-Q4):</b> Which value will be the value of `x` ? \n",
"</div>\n",
"\n",
"Which value will be the value of `x` ?"
@@ -1309,7 +1330,7 @@
],
"metadata": {
"kernelspec": {
"display_name": "Julia 1.9.3",
"display_name": "Julia 1.9.0",
"language": "julia",
"name": "julia-1.9"
},
@@ -1317,7 +1338,7 @@
"file_extension": ".jl",
"mimetype": "application/julia",
"name": "julia",
"version": "1.9.3"
"version": "1.9.0"
}
},
"nbformat": 4,