Hello,
I've recently been told that the siblings field in /proc/cpuinfo should
have a count of 2 when hyperthreading is enabled in the bios of a
machine and should drop to 1 when hyperthreading is disabled in the bios
of a machine. I have a vendor who is using this algorithm to decide
whether they should divide by 2 on the number of processors showing in
/proc/cpuinfo to obtain the real count of physical processors in the
machine. I've noticed on my Dell 2-cpu Xeon, that siblings field does
not change when you enable/disable the hyperthreading feature in the
bios (only the number of processors seen in /proc/cpuinfo). My question
I guess is this a bug in the bios of my Dell box(should siblings count
drop to 1 when hyperthreading is disabled?). I would think a better
approach for the vendor would be to look at the physical ID field in
/proc/cpuinfo since I've noticed that each real physical cpu has a
different ID.
Please CC me on answers since I'm not on the list. Thanks for any
insight you provide.
Rich Wohlstadter
Genome Sequencing Center
Washington University of Saint Louis
[email protected]
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
