> > > Have you tried benchmarking process to process context switch times to see
> > > if the results are similar?

I put a quartet of histograms here:

  http://www.cs.utah.edu/~regehr/freebsd_ctx_quantum.eps
  http://www.cs.utah.edu/~regehr/freebsd_ctx_yield.eps

that demonstrate, basically, what Terry said: on FreeBSD 4.5 context
switches between Linuxthreads cost the same as between processes.

John



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