Microkernel Performance: FreeBSD versus Darwin

[Christoph Hellwig]

On Sun, Sep 05, 2004 at 07:31:54PM -0400, Robert Watson wrote:
> 
> On Sat, 4 Sep 2004, Paul Smith wrote:
> 
> > Theoretically the microkernel of Darwin should create overheads harming
> > the performance.  Has anybody seen an actual study comparing the
> > performance of Darwin and FreeBSD? 
> 
> FYI, Darwin doesn't use a microkernel.  It includes code elements from
> Mach, which did use a microkernel, but those elements are integrated into
> the same address space as the remainder of the kernel (file system,
> network stack, etc).  I'm not sure I've seen any performance studies,
> regardless.

http://www-106.ibm.com/developerworks/linux/library/l-ydlg5.html?ca=dgr-mw05LinxOnG5

has some microbenchmarks for darwin vs linux