How come openSUSE 11.3 is treating my processor as a single core now? On 11.2 it saw all 4 cores and the hyperthreading made it seem like I had 8 (obviously) but now it’s only showing 1 core.
Is this normal?
For the record I have a Toshiba A505-6034 with an Intel Core i7
Telume wrote:
>
> How come openSUSE 11.3 is treating my processor as a single core now?
> On 11.2 it saw all 4 cores and the hyperthreading made it seem like I
> had 8 (obviously) but now it’s only showing 1 core.
>
> Is this normal?
No. If this is a vanilla 11.3 install, I would open a bugreport.
–
Per Jessen, Zürich (21.2°C)
http://en.opensuse.org/User:Pjessen
I had a similar problem with my AMD Phenom II 955. Only three cores were recognized by both openSUSE 11.2 and 11.3. I went in the BIOS and disabled both virtualization (which I don’t use) and power saving features (C1E and Cool’N’Quiet). This has fixed the problem for me. I haven’t done any further tests to isolate precisely which BIOS option fixed it, but I would recommend you also try disabling all such advanced features, and if it fixes the problem you can enable them one by one to find out which is the culprit.
When I was searching for solutions I also found people who fixed similar problems by removing a USB hub, or by disabling USB 2.0 (i.e. running at USB 1.1 speeds, which is 12 Mbit/s).
Quantumboredom wrote:
>
> I had a similar problem with my AMD Phenom II 955. Only three cores
> were recognized by both openSUSE 11.2 and 11.3. I went in the BIOS and
> disabled both virtualization (which I don’t use) and power saving
> features (C1E and Cool’N’Quiet). This has fixed the problem for me. I
> haven’t done any further tests to isolate precisely which BIOS option
> fixed it, but I would recommend you also try disabling all such
> advanced features, and if it fixes the problem you can enable them one
> by one to find out which is the culprit.
>
> When I was searching for solutions I also found people who fixed
> similar problems by removing a USB hub, or by disabling USB 2.0 (i.e.
> running at USB 1.1 speeds, which is 12 Mbit/s).
Just my opinion - cpu cores not being properly identified is pretty
critical, and not an issue of peripheral hardware. It would be better
to search for the root cause rather than attempt to circumnavigate the
problem.
Or least don’t do so without reporting it. Reporting the proiblem will
help getting the problem solved for others too, thereby increasing the
quality for everyone.
–
Per Jessen, Zürich (26.3°C)
http://en.opensuse.org/User:Pjessen
On 2010-07-16 00:56 GMT Telume wrote:
>
> How come openSUSE 11.3 is treating my processor as a single core now?
> On 11.2 it saw all 4 cores and the hyperthreading made it seem like I
> had 8 (obviously) but now it’s only showing 1 core.
>
> Is this normal?
What kernel boot options are you using?
If you do not know, execute:
grep “Kernel command line” /var/log/boot.msg
–
Cheers / Saludos,
Carlos E. R.
(from 11.2 x86_64 “Emerald” GM (Minas Tirith))
How can you guys tell how many cores it recognizes anyway, curiosity… ???
-cheers
I opened the system monitor and it tells me how many cores/threads I have
openSUSE 11.2 recognized that I had 4 cores with 2 threads each (hence “8 cores”)
OpenSUSE 11.3 only recognizes it as one, STRANGELY I still seem to be getting the boosts. I’m just going to stick to 11.2 if this is the case.
And I’m not using anything except for the default boot options.
I should probably point out my set up to give you guys a better idea
Toshiba Satellite A505-6034
Intel Core i7 Q720 1.6 GHz
nVidia GeForce 330M
4GB RAM (not sure what type)
openSUSE 11.3 x86_64
On 2010-07-16 11:20 GMT Per Jessen wrote:
> Quantumboredom wrote:
> > When I was searching for solutions I also found people who fixed
> > similar problems by removing a USB hub, or by disabling USB 2.0
> > (i.e. running at USB 1.1 speeds, which is 12 Mbit/s).
>
> Just my opinion - cpu cores not being properly identified is pretty
> critical, and not an issue of peripheral hardware. It would be better
> to search for the root cause rather than attempt to circumnavigate the
> problem.
Wild guess: that hardware might disable acpi, and that in turn disables
cores.
> Or least don’t do so without reporting it. Reporting the proiblem will
> help getting the problem solved for others too, thereby increasing the
> quality for everyone.
Absolutely.
–
Cheers / Saludos,
Carlos E. R.
(from 11.2 x86_64 “Emerald” GM (Minas Tirith))
subcook69420 wrote:
>
> How can you guys tell how many cores it recognizes anyway,
> curiosity… ???
>
cat /proc/cpuinfo
That’ll tell you about cpus, cores, and hyperthreading.
You can also run ‘top’ and hit ‘1’ to see the chugging away.
–
Per Jessen, Zürich (29.4°C)
http://en.opensuse.org/User:Pjessen
Carlos E. R. wrote:
> What kernel boot options are you using?
>
> If you do not know, execute:
>
> grep “Kernel command line” /var/log/boot.msg
cat /proc/cmdline
–
Per Jessen, Zürich (29.5°C)
http://en.opensuse.org/User:Pjessen
Telume wrote:
>
> I opened the system monitor and it tells me how many cores/threads I
> have
>
> openSUSE 11.2 recognized that I had 4 cores with 2 threads each (hence
> “8 cores”)
>
> OpenSUSE 11.3 only recognizes it as one, STRANGELY I still seem to be
> getting the boosts. I’m just going to stick to 11.2 if this is the
> case.
I don’t know the system monitor, could you perhaps post output
from “cat /proc/cpuinfo | grep processor” ?
–
Per Jessen, Zürich (30.0°C)
http://en.opensuse.org/User:Pjessen