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Architecture

OS

Development

Source Code

Boot

CPU

Hardware

Graphics

Process

Scheduler

Real-Time

Power

Memory

Clock

Interrupts

I/O

Synchronization

Filesystem

Device

Network

Sound

Virtualization

Security

New 2.6.23 / Server 2008

Better in other Kernels or OS

Notes

Kernel Comparison: Linux (2.6.22) versus Windows (Vista)

Development

Kernel Development

*Development (kernel)*	Linux	Windows
development model	open source	closed source
development cycle time -major release	35 months^'³⁰	63 months^'³¹
development cycle time -minor release	3 months^'³⁰	31 months^'³¹
development cycle time -patch release	ongoing	ongoing
development process - simple	Y	N
modularity - high	Y	N

OS/Kernel Release

*OS⁴²/Kernel Release*	Linux	Windows
OS⁴² / kernel releases synchronised (generally)	N	Y
kernel release used unpatched in OS⁴² (generally)	N	Y

Driver Development

*Development (drivers)*	Linux	Windows
development model	open source closed source (few binary drivers)	closed source
driver authors (in general)	community manufacturer (source or binary)	manufacturer
constant kernel ABI⁵	N	Y
drivers in kernel source tree⁵, ⁹	Y N (few binary drivers⁹)	N
binary driver testing (as part of release)	N Y (few)	Y

Kernel Compiler

*Kernel Compiler*	Linux	Windows
compiler	gcc^'	closed
compiler - additional	-^'	closed SEH/VEH
compiler version	3.2-4.3^'	closed
compiler - alternative	Intel icc (not recommended)	-

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