Robert Milkowski <[EMAIL PROTECTED]> wrote:
> Hello opensolaris-code,
>
> U3+patches (Generic_125100-10) - I know, I know - but I belive it is
> also the case on snv.
>
> # lofiadm
> Block Device File
> /dev/lofi/1 /home/milek/sol-nv-b69-x86-dvd.iso
>
> # mount -v | grep lofi
> /dev/lofi/1 on /mnt type hsfs
> read-only/setuid/devices/noglobal/maplcase/rr/traildot/dev=24c0001 on Mon Aug
> 6 18:06:55 2007
>
>
> # cd /mnt/Solaris_11/Tools/
> # ./setup_install_server /se3310/jumpstart/os/snv-b69-x86
>
> I can see one 'du' process consuming entire CPU.
>
> # dtrace -n fbt:::entry'{self->vt=vtimestamp;}' -n
> fbt:::return'/self->vt/[EMAIL PROTECTED](vtimestamp-self->vt);self->vt=0;}'
> -n tick-5s'{printa(@);exit(0);}'
>
> [...]
> strncmp 9034200
> hwblkclr 9044100
> page_next_scan_large 22107700
> kcage_walk_cage 35919800
> generic_idle_cpu 62118000
> page_numtopp_nolock 90173700
> disp_getwork 121844000
> hs_findhash 3012048500
>
> #
> # dtrace -n profile-97'[EMAIL PROTECTED],stack()]=count();}'
>
> [...]
> 1
> hsfs`hs_findhash+0x2c
> hsfs`hs_makenode+0x54
> hsfs`process_dirblock+0x3d0
> hsfs`hs_dirlook+0x224
> genunix`fop_lookup+0x28
> genunix`lookuppnvp+0x344
> genunix`lookuppnat+0x120
> genunix`lookupnameat+0x5c
> genunix`chdir+0x24
> unix`syscall_trap32+0xcc
> 46
...
> Looks like something in hsfs module is not efficient...
If you like to run tests, please start with a halfway recent hsfs, e.g.:
ftp://ftp.berlios.de/pub/schily/kernel/hsfs/
It seems that you have some ideas why hsfs is slow but you did not name them
explicitely. Could you give us more information?
I know that an important reason for a slow hsfs is the number of seeks
on the medium which will now show up in your tests.....
Last week we had already a discussion on that hsfs needs to do more
caching for meta data to avoid seeks on the medium.
Jörg
--
EMail:[EMAIL PROTECTED] (home) Jörg Schilling D-13353 Berlin
[EMAIL PROTECTED] (uni)
[EMAIL PROTECTED] (work) Blog: http://schily.blogspot.com/
URL: http://cdrecord.berlios.de/old/private/ ftp://ftp.berlios.de/pub/schily
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