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nepouziva nahodou darwin klasicky FBSD planovac? na ten bolo uz vela kydov, co sa tyka hlavne vykonu pri SMP a tak. Ze je sice stabilny, ale hlavne pri SMP straca vykon a velmi rastie overhead.




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jakub
 jakub      18.09.2007 - 17:31:33 , level: 1, UP   NEW
nie, nepouziva scheduler z freebsd

Darwin is built around XNU, a hybrid kernel that combines the Mach 3 microkernel, various elements of FreeBSD 5 (including the process model, network stack, and virtual file system), and an object-oriented device driver API called I/O Kit.[1]

Some of the benefits of this choice of kernel are the Mach-O binary format, which allows a single executable file (including the kernel itself) to support multiple CPU architectures, and the mature support for symmetric multiprocessing in Mach.

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maniac
 maniac      18.09.2007 - 16:52:27 , level: 1, UP   NEW
no fasa, tak to je potom to core2 duo v tych intel masinach na dve veci :(

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paket
 paket      18.09.2007 - 23:31:02 , level: 2, UP   NEW
neboj, smp bezi v pohode, logic je ukazkovy priklad

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maniac
 maniac      19.09.2007 - 08:50:08 , level: 3, UP   NEW
co je logic plz?

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paket
 paket      19.09.2007 - 16:44:05 , level: 4, UP   NEW
Digital Audio Workstation
http://www.apple.com/logicstudio/

má najlepšie fungujúci audio multiprocessing aký som doteraz videl (v rámci reálnych možností)
pekne rozkladá výkon medzi procesormi/jadrami

Darwin Mach kernel má vlastný SMP a BSD vrstva je v kerneli preto, lebo prepínanie kontextov pri systémových volaniach je náročná (nevýhoda mikrokernelu)