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howtos:hardware:processor_affinity [2013/01/13 18:10 (UTC)]
hazel [Taskset]
howtos:hardware:processor_affinity [2013/01/13 18:12 (UTC)] (current)
hazel [Taskset]
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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 command line, 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

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