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14 lines
1.4 KiB
Text
Executable file
14 lines
1.4 KiB
Text
Executable file
$WW,1$ZenithOS does master-slave multicore instead of SMP. $FG,2$Core0$FG$ is the master. The master core's applications explicitly assign computational jobs to other cores and the ZenithOS scheduler does not move tasks between cores.
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There are multicore safe locks for file access and heap allocations, however, so ZenithOS is symmetrical in some sense. See $LK,"::/Demo/MultiCore/LoadTest.CC"$.
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Only tasks on $FG,2$Core0$FG$ can have windows, but other cores can help render them.
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Each core has an executive $LK,"Seth Task",A="FF:::/Doc/Glossary.DD,Seth Tasks"$ which is the father of all tasks on that core. $LK,"Zenith",A="FF:::/Doc/Glossary.DD,Zenith Task"$ is the $LK,"Seth Task",A="FF:::/Doc/Glossary.DD,Seth Tasks"$ on $FG,2$Core0$FG$.
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You give a job to a $LK,"Seth Task",A="FF:::/Doc/Glossary.DD,Seth Tasks"$ with $LK,"JobQueue",A="MN:JobQueue"$() and get the result with $LK,"JobResGet",A="MN:JobResGet"$(). You spawn a task on any core with $LK,"Spawn",A="MN:Spawn"$().
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Note: You must use the $FG,2$LOCK$FG$ asm prefix when changing shared structures in a multicore environment. The $LK,"LBts",A="MN:LBts"$(), $LK,"LBtr",A="MN:LBtr"$() and $LK,"LBtc",A="MN:LBtc"$() insts have $FG,2$LOCK$FG$ prefixes. The compiler has a $FG,2$lock{}$FG$ feature but it doesn't work well. See $LK,"::/Demo/MultiCore/Lock.CC"$.
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See $LK,"::/Demo/Graphics/Transform.CC"$.
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See $LK,"::/Kernel/MultiProc.CC"$.
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