Re: [9fans] duppage

[cinap_lenrek@felloff.net]

i get consistent results with iostats for building pc64.
(on amd64)

  166      192   104916        0        0 /bin/rc
    4       90   343308        0        0 /bin/awk
   37       51    51280        0        0 /bin/echo
   17       43   103786        0        0 /bin/sed
    3       17    51567        0        0 /bin/ls
    3       12    34624        0        0 /bin/grep
   13       24    40114        0        0 /bin/cp
    1        6    19112        0        0 /bin/pwd
    4       15    40658        0        0 /bin/xd
  128      192   263785        0        0 /bin/6c
    5       34   113149        0        0 /bin/6l
    4       27    89551        0        0 /bin/6a
    1       10    33360        0        0 /bin/mkdir
    2        9    22016        0        0 /bin/dd
    4       18    55085        0        0 /bin/strip
    1       17    62301        0        0 /bin/mkpaqfs
    4       14    33797        0        0 /bin/rm
    2        3      121        0        0 /bin/membername
    2       15    46432        0        0 /bin/tr
    1       19    72544        0        0 /bin/ar
    1        4    10992        0        0 /bin/cat
    2       24    86580        0        0 /bin/hoc
    4       26    86433        0        0 /bin/file
    4       13    33439        0        0 /bin/aux/data2s
    1        7    23488        0        0 /bin/date
    1       14    49502        0        0 /bin/size
    1       25    94969        0        0 /bin/mk

i made a small test trying running echo 1,2,3 and 4 times
and i get exactly one additional read per exec (which
is the read of the file header) all the other pages
are cached.

with MCACHE mount, it is exactly the same amount of
reads no matter how often i run it. :)

but thats not loaded. is your machine starved of memory?

my guess would be that the cached pages getting uncached
and reused in your case. i remember fixing some bugs
in imagereclaim that could potentially cause this.

but thats all speculation...

theres a statistics struct there that you can peek on
from acid -k and see how often imagereclaim runs between
your test passes.

--
cinap