[ntp:questions] Which version of Linux works best?

Uwe Klein uwe_klein_habertwedt at t-online.de
Fri Mar 12 11:26:18 UTC 2010


David Woolley wrote:
> That's 1000 machine cycles, not 1000 instructions.  On modern systems, 
> I'm not sure that 1000 cycles isn't a typical time for a system call on 
> modern, high level language progammed, bloatware.  (I seem to remember 
> hand coding an ISR in assembler to a budget of 100 instructions (for 
> 68000) and it not being that easy.)

100 68k instructions will take  from 1000 to 5000 clk cycles on the basic 68k.
cache, pipelines and superscalar execution started to have increasing impact
with 68030 and 68040 ( in exchange killing deterministic reaction times for good )


uwe





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