I have a P4 system, which >>appears<< to be HT capable. However, the BIOS
(newest from vendor) does not give the option of turning HT on. Without
support from the BIOS, can HT be forced? Or am I mis-reading the info below,
and my CPU really is not HT capable.
BTW, I tested with 2.6.10-1.741_FC3smp, and tried "acpismp=force" (as
described below).
Thanks,
--rick
-----------------
With dmesg, I get:
CPU: After generic identify, caps: bfebfbff 00000000 00000000 00000000
CPU: After vendor identify, caps: bfebfbff 00000000 00000000 00000000
CPU: Trace cache: 12K uops, L1 D cache: 8K
CPU: L2 cache: 512K
CPU: Hyper-Threading is disabled
CPU: After all inits, caps: bfebf3ff 00000000 00000000 00000080
Intel machine check architecture supported.
Intel machine check reporting enabled on CPU#0.
CPU0: Intel P4/Xeon Extended MCE MSRs (12) available
CPU0: Thermal monitoring enabled
Enabling fast FPU save and restore... done.
Enabling unmasked SIMD FPU exception support... done.
Checking 'hlt' instruction... OK.
CPU0: Intel(R) Pentium(R) 4 CPU 2.66GHz stepping 09
per-CPU timeslice cutoff: 1463.05 usecs.
task migration cache decay timeout: 2 msecs.
Total of 1 processors activated (5259.26 BogoMIPS).
/proc/cpuinfo says:
processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 2
model name : Intel(R) Pentium(R) 4 CPU 2.66GHz
stepping : 9
cpu MHz : 2660.819
cache size : 512 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov
patpse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe cid xtpr
^^
bogomips : 5259.26
and dmidecode says:
Handle 0x0005
DMI type 4, 35 bytes.
Processor Information
Socket Designation: XU1 PROCESSOR
Type: Central Processor
Family: Pentium 4
Manufacturer: Intel
ID: 29 0F 00 00 FF FB EB BF
Signature: Type 0, Family F, Model 2, Stepping 9
Flags:
FPU (Floating-point unit on-chip)
VME (Virtual mode extension)
DE (Debugging extension)
PSE (Page size extension)
TSC (Time stamp counter)
MSR (Model specific registers)
PAE (Physical address extension)
MCE (Machine check exception)
CX8 (CMPXCHG8 instruction supported)
APIC (On-chip APIC hardware supported)
SEP (Fast system call)
MTRR (Memory type range registers)
PGE (Page global enable)
MCA (Machine check architecture)
CMOV (Conditional move instruction supported)
PAT (Page attribute table)
PSE-36 (36-bit page size extension)
CLFSH (CLFLUSH instruction supported)
DS (Debug store)
ACPI (ACPI supported)
MMX (MMX technology supported)
FXSR (Fast floating-point save and restore)
SSE (Streaming SIMD extensions)
SSE2 (Streaming SIMD extensions 2)
SS (Self-snoop)
>>> HTT (Hyper-threading technology)
TM (Thermal monitor supported)
SBF (Signal break on FERR)
Version: Intel(R) Pentium(R) 4 CPU 2.66GHz
Voltage: 1.5 V
External Clock: 533 MHz
Max Speed: 3200 MHz
Current Speed: 2666 MHz
Status: Populated, Enabled
Upgrade: Socket 478
L1 Cache Handle: 0x0006
L2 Cache Handle: 0x0007
L3 Cache Handle: Not Provided
Serial Number: Not Specified
Asset Tag: Not Specified
Part Number: Not Specified
Googling came up with references to using acpismp=force, but they seemed to be
in context of 2.4.* and 2.5.* kernels; didn't see anything wrt 2.6.*.
