Re: [PATCH RT 00/02] SLOB optimizations

[George Anzinger <george@mvista.com>]

> that's just the profiling interrupt hitting them. You should not analyze 
> irq-safe code with a non-NMI profiling interrupt.
>
> CLI/STI is extremely fast. (In fact in the -rt tree i'm using them 
> within mutexes instead of preempt_enable()/preempt_disable(), because 
> they are faster and generate less register side-effect.)
Hm... I rather thought that the cli would cause a rather large hit on 
the pipeline and certainly on OOE.  Is your observation based on any 
particular instruction stream?  Sti, on the otherhand should be fast...
--
George Anzinger   george@mvista.com
HRT (High-res-timers):  http://sourceforge.net/projects/high-res-timers/
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