Re: [PATCH 11/12] readahead: nfsd support

[Wu Fengguang <wfg@mail.ustc.edu.cn>]

On Sat, Dec 17, 2005 at 11:05:22AM +1100, Greg Banks wrote:
> On Fri, Dec 16, 2005 at 09:07:49PM +0800, Wu Fengguang wrote:
> > ------------------------------------------------------------------------
> > Here is some test output(8 nfsd; local mount with tcp,rsize=8192):
> 
> What are the numbers when you use a more realistic rsize like 32768? 

Here they are.  The normal data are now much better, and come close to that of
the serialized ones.

NORMAL

readahead_ratio = 8, ra_max = 1024kb (old logic)
48.36s real  2.22s system  1.51s user  7209+4110 cs  diff $NFSFILE $NFSFILE2
readahead_ratio = 70, ra_max = 1024kb (new logic)
30.04s real  2.46s system  1.33s user  5420+2492 cs  diff $NFSFILE $NFSFILE2

readahead_ratio = 8, ra_max = 1024kb
92.99s real  10.32s system  3.23s user  145004+1826 cs  diff -r $NFSDIR $NFSDIR2 > /dev/null
readahead_ratio = 70, ra_max = 1024kb
90.96s real  10.68s system  3.22s user  144414+2520 cs  diff -r $NFSDIR $NFSDIR2 > /dev/null

SERIALIZED

readahead_ratio = 8, ra_max = 1024kb
47.58s real  2.10s system  1.27s user  7933+1357 cs  diff $NFSFILE $NFSFILE2
readahead_ratio = 70, ra_max = 1024kb
29.46s real  2.41s system  1.38s user  5590+2613 cs  diff $NFSFILE $NFSFILE2

readahead_ratio = 8, ra_max = 1024kb
93.02s real  10.67s system  3.25s user  144850+2286 cs  diff -r $NFSDIR $NFSDIR2 > /dev/null
readahead_ratio = 70, ra_max = 1024kb
91.15s real  11.04s system  3.31s user  144432+2814 cs  diff -r $NFSDIR $NFSDIR2 > /dev/null

Regards,
Wu
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