Intel G41 graphics are slow while memory runs in dual channel mode.

Oliver Fromme olli at
Fri Dec 17 17:42:28 UTC 2010

Gary Jennejohn wrote:
 > I doubt this has anything to do with dual-channel memory.  More likely
 > is that you're trying to use 4GiB with i386, which can cause all kinds
 > of problems.
 > You have two options, as fas as I can tell
 > 1) run amd64, which can use the full 4GiB of memory
 > 2) set hm.physmem to 3G (or maybe a little more) in /boot/loader.conf

Are you sure that the second option has any effect?
I also run i386 on two different boxes that have 4 GB RAM,
and hw.physmem is set to 3.something automatically:

olli at hexagon:~> sysctl hw.physmem; uname -rsm
hw.physmem: 3474989056
FreeBSD 8.1-STABLE-20100908 i386

olli at atom:~> sysctl hw.physmem; uname -rsm
hw.physmem: 3740434432
FreeBSD 8.1-PRERELEASE-20100620 i386

I haven't touched hw.physmem on these machines myself.
Both boards have 2 x 2GB DIMMs.  The former is an ASUS
M4A88TD-V EVO/USB3, the latter is an ASRock A330GC.

Best regards

Oliver Fromme, secnetix GmbH & Co. KG, Marktplatz 29, 85567 Grafing b. M.
Handelsregister: Registergericht Muenchen, HRA 74606,  Geschäftsfuehrung:
secnetix Verwaltungsgesellsch. mbH, Handelsregister: Registergericht Mün-
chen, HRB 125758,  Geschäftsführer: Maik Bachmann, Olaf Erb, Ralf Gebhart

FreeBSD-Dienstleistungen, -Produkte und mehr:

"C++ is over-complicated nonsense. And Bjorn Shoestrap's book
a danger to public health. I tried reading it once, I was in
recovery for months."
        -- Cliff Sarginson

More information about the freebsd-x11 mailing list