[2024-feb-29] Sad news: Eric Layton aka Nocturnal Slacker aka vtel57 passed away on Feb 26th, shortly after hospitalization. He was one of our Wiki's most prominent admins. He will be missed.

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howtos:hardware:processor_affinity [2013/01/13 18:09 (UTC)] – [Processor affinity] hazelhowtos:hardware:processor_affinity [2013/01/13 18:12 (UTC)] (current) – [Taskset] hazel
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-Slackware has a tool for setting the processor affinity for a certain task or process. It is called "''taskset''" and is part of the ''util-linux'' package. Run "''man 1 taskset''" if you want to know more about its purpose and commandline syntax.+Slackware has a tool for setting the processor affinity for a certain task or process. It is called "''taskset''" and is part of the ''util-linux'' package. Run "''man 1 taskset''" if you want to know more about its purpose and command line syntax.
  
 <note>The ''taskset'' command is used to set or retrieve the CPU affinity of a running process given its PID, or to launch a new COMMAND with a given CPU affinity.</note> <note>The ''taskset'' command is used to set or retrieve the CPU affinity of a running process given its PID, or to launch a new COMMAND with a given CPU affinity.</note>
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 0xffffffff means all processors (#0 through #31) 0xffffffff means all processors (#0 through #31)
 </code> </code>
-Luckily you can use human-readable numbers instead of a bitmask if you add the "-c" commandline parameter.+Luckily you can use human-readable numbers instead of a bitmask if you add the "-c" command line parameter.
  
 Examples: Examples:
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 </code> Confused by hexadecimal numbers? Then use the human-readable version: <code> </code> Confused by hexadecimal numbers? Then use the human-readable version: <code>
 $ taskset -cp 1 1337 $ taskset -cp 1 1337
-</code> You may notice the strange order of commandline options and arguments; first come all the options and then follow the argument values in pre-defined order... ''man taskset(1)'' is your friend. +</code> You may notice the strange order of command line options and arguments; first come all the options and then follow the argument values in pre-defined order... ''man taskset(1)'' is your friend. 
-  * To start a new process with a fixed CPU affinity, you omit the "-p" switch and append a commandline, like this real-world example of starting a Minecraft server: <code>+  * To start a new process with a fixed CPU affinity, you omit the "-p" switch and append a command line, like this real-world example of starting a Minecraft server: <code>
 $ taskset -c 3 java -Xmx1024M -jar minecraft_server.jar nogui $ taskset -c 3 java -Xmx1024M -jar minecraft_server.jar nogui
 </code> which ties the Java process to the 4th CPU in your computer. The effect of this will be //immediately// obvious. </code> which ties the Java process to the 4th CPU in your computer. The effect of this will be //immediately// obvious.

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