User time and system time

[Peter Dalgaard BSA]

Douglas Bates <bates@stat.wisc.edu> writes:

>  [1]   1.09 288.05 289.00   0.00   0.00
> 
> I can't really believe that it took only 1 second of user time and 288 
> seconds of system time.  It didn't even do garbage collection in R (I
> had gcinfo(T) set) and it wasn't swapping.

Does sound a bit extreme...

Could you be experiencing either libc code implemented as syscalls or
an effect of Linux's (mis?)feature of overcommitted memory (i.e. you
do a malloc, but all you really get is a bunch of virtual pages that
has to get cleaned when you access them the first time.

(Just talking through the top of my head, in case you didn't notice
that...) 

-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard@biostat.ku.dk)             FAX: (+45) 35327907

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