Hi all,
My linux kernel did'nt detect my L2 cache on any of my two cpu ( this is an smp box ) here is the /proc/cpuinfo:
Therse processor are perfect Steping match SL3FJ( therse old katmai processor have 512k l2 cache ).
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 7
model name : Pentium III (Katmai)
stepping : 3
cpu MHz : 549.070
cache size : 32 KB
[...]
processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 7
model name : Pentium III (Katmai)
stepping : 3
cpu MHz : 549.070
cache size : 32 KB
And I get nothing in my dmesg about l2 cache ( 'dmesg | grep L2' give nothing )
I'm on an plain vanilla kernel ( 2.4.18 taken at kernel.org ) with xfs-1.1 patch.
At boot my bios say that my L2 of my two cpu are ok.
my dmesg will be online at http://paxl.no-ip.org/~paxl/dmesg.txt if somone mind.
Another fuzzy thing .. compiling my kernel normaly ( -j 1 ) take 30min and when I make it with -j 2/8/16 it take 25min, I think this is due to my L2 cache problem but that not normal, if somone have an idea.. I should be realy interested.
Another little detail that could help you, my mother board is an AMI MegaRUM II(that a dual p2/p3 mobo).
I hope somone will have an solution.
Thank you for your time
Xavier LaRue
On Monday 16 December 2002 19:30, Xavier LaRue wrote:
Hi Xavier,
> My linux kernel did'nt detect my L2 cache on any of my two cpu ( this is an
> smp box ) here is the /proc/cpuinfo: Therse processor are perfect Steping
> match SL3FJ( therse old katmai processor have 512k l2 cache ).
> And I get nothing in my dmesg about l2 cache ( 'dmesg | grep L2' give
> nothing ) I'm on an plain vanilla kernel ( 2.4.18 taken at kernel.org )
> with xfs-1.1 patch. At boot my bios say that my L2 of my two cpu are ok.
This is fixed in 2.4.21-pre1. You have to upgrade or play with this patch:
http://linux.bkbits.net:8080/linux-2.4/[email protected]?nav=index.html|ChangeSet@-3w
I am afraid this will not apply clean ontop of 2.4.18.
ciao, Marc
On Mon, 16 Dec 2002, Xavier LaRue wrote:
> my dmesg will be online at http://paxl.no-ip.org/~paxl/dmesg.txt if somone mind.
>
>
> Another fuzzy thing .. compiling my kernel normaly ( -j 1 ) take 30min
> and when I make it with -j 2/8/16 it take 25min, I think this is due to
> my L2 cache problem but that not normal, if somone have an idea.. I
> should be realy interested.
sounds like you've got your l2 turned off in the bios to me.
Mike
On Mon, Dec 16, 2002 at 01:56:09PM -0500, Mike Dresser wrote:
> > my dmesg will be online at http://paxl.no-ip.org/~paxl/dmesg.txt if somone mind.
> > Another fuzzy thing .. compiling my kernel normaly ( -j 1 ) take 30min
> > and when I make it with -j 2/8/16 it take 25min, I think this is due to
> > my L2 cache problem but that not normal, if somone have an idea.. I
> > should be realy interested.
> sounds like you've got your l2 turned off in the bios to me.
2.4 right up until .21pre1 has a bug in the cache sizing routine.
It should be fixed now.
Dave
--
| Dave Jones. http://www.codemonkey.org.uk
| SuSE Labs
On Mon, 16 Dec 2002 13:56:09 -0500 (EST)
Mike Dresser <[email protected]> wrote:
> On Mon, 16 Dec 2002, Xavier LaRue wrote:
>
> > my dmesg will be online at http://paxl.no-ip.org/~paxl/dmesg.txt if somone mind.
> >
> >
> > Another fuzzy thing .. compiling my kernel normaly ( -j 1 ) take 30min
> > and when I make it with -j 2/8/16 it take 25min, I think this is due to
> > my L2 cache problem but that not normal, if somone have an idea.. I
> > should be realy interested.
>
> sounds like you've got your l2 turned off in the bios to me.
There is no option in my bios to enable or disable L2 cache..
And at boot I get this
DSP Microcode OK ...... L2 512KB OK
AS#1 Microcode OK ...... L2 512KB OK
So I assume that the bios enable it, do there is a way to Force the kernel to use it even if he can't detect it ??
Thank you for your time and answer :)
Xavier LaRue