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New 2.6.23 / Server 2008

Better in other Kernels or OS

Notes

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

Process

Process Unit

*Process (unit)*	Linux	Windows
process - nomenclature	task	container, holds at least one thread
process - holds address space, handle table, statistics	Y	Y
parent-child relationship	Y	N

Thread

*Thread*	Linux	Windows
thread model	1×1^'	m×n
preemptive thread scheduling	Y	Y^'
thread	Y (tasks can²⁴	Y
POSIX Threads	Y^'	N Y (add-on)^'

Fiber

*Fiber*	Linux	Windows
fiber (user-space thread)	Y	Y

Process Performance

*Process, Thread, Fiber (performance)*	Linux	Windows
process cheap	Y^'	N^'
process cheap - benchmark	719K cycles¹⁰^'	5,376K cycles¹⁰^'
thread cheap	Y^'	Y^'
fiber cheap	Y^'	Y^'

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Johnathon Weare © Johnny Weare 2007
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