6-CURRENT unbelievably slow?

[Scott Long]

Joe Marcus Clarke wrote:
> I've been using -CURRENT for a long time now (from early 5.X up to 6.X),
> and even with WITNESS and INVARIANTS things didn't seem this slow.  I
> have a P4 2.4 GHz machine with 2 GB of RAM running a very recent
> 6-CURRENT:
> 
> FreeBSD fugu.marcuscom.com 6.0-CURRENT FreeBSD 6.0-CURRENT #11: Wed Nov
> 10 01:03:33 EST 2004
> gnome at fugu.marcuscom.com:/space2/obj/usr/src/sys/FUGU  i386
> 
> (The version prior to this from October 14 was fine), and it takes
> around _8 hours_ to do a make world (this is my GNOME Tinderbox
> machine).  The disk on which the build is taking place is an SATA-150
> drive, and the system drive is a U320 SCSI disk on an mpt controller.
> There is nothing else happening on this system while it builds, and the
> build is happening normally (i.e. not through NFS, nullfs, etc.).
> 
> Attached are my dmesg and my kernel config.  Nothing has changed
> configuration or hardware wise between when performance was good
> (October 14 build) and now (November 10 build).  I have userland malloc
> debugging disabled with /etc/malloc.conf -> ajH.
> 
> Any help would be most appreciated since I'd like to kick out a new
> batch of GNOME packages.  Thanks.
> 

Nothing has happened recently that I would suspect.  The only reasonable
idea I can come up with is the recent HZ change.  Can you try backing
that down to 100?

Scott