| 1 |
On Wed, Jun 10, 2009 at 3:13 PM, Greg<journey@×××××××××××××××.net> wrote: |
| 2 |
> I've been having trouble determining if my processor has hyper-threading. I'm thinking that it does. I know that it isn't |
| 3 |
> a dual-core. |
| 4 |
> |
| 5 |
> If it is a hyper-thread processor, I can't seem to figure out exactly how to enable the hyper-thread under linux. |
| 6 |
> |
| 7 |
> First, here's the CPU info from /proc/cpuinfo |
| 8 |
> |
| 9 |
> processor : 0 |
| 10 |
> vendor_id : AuthenticAMD |
| 11 |
> cpu family : 15 |
| 12 |
> model : 95 |
| 13 |
> model name : AMD Athlon(tm) 64 Processor 3800+ |
| 14 |
> stepping : 2 |
| 15 |
> cpu MHz : 1000.000 |
| 16 |
> cache size : 512 KB |
| 17 |
> fpu : yes |
| 18 |
> fpu_exception : yes |
| 19 |
> cpuid level : 1 |
| 20 |
> wp : yes |
| 21 |
> flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx mmxext fxsr_opt rdtscp lm 3dnowext 3dnow up rep_good pni cx16 lahf_lm svm extapic cr8_legacy |
| 22 |
> bogomips : 2009.87 |
| 23 |
> TLB size : 1024 4K pages |
| 24 |
> clflush size : 64 |
| 25 |
> cache_alignment : 64 |
| 26 |
> address sizes : 40 bits physical, 48 bits virtual |
| 27 |
> power management: ts fid vid ttp tm stc |
| 28 |
> |
| 29 |
> |
| 30 |
> I have the gentoo genkernel sources version 2.6.28-r5 currently installed. |
| 31 |
> The > processor section looks like this: |
| 32 |
> . . [*] Tickless System (Dynamic Ticks) . . |
| 33 |
> . . [*] High Resolution Timer Support . . |
| 34 |
> . . [*] Symmetric multi-processing support . . |
| 35 |
> . . [*] Enable MPS table . . |
| 36 |
> . . Subarchitecture Type (PC-compatible) ---> . . |
| 37 |
> . . [ ] Paravirtualized guest support ---> . . |
| 38 |
> . . [ ] Memtest . . |
| 39 |
> . . Processor family (Opteron/Athlon64/Hammer/K8) ---> . . |
| 40 |
> . . [ ] Supported processor vendors ---> . . |
| 41 |
> . . [*] Enable DMI scanning . . |
| 42 |
> . . [*] GART IOMMU support . . |
| 43 |
> . . [*] IBM Calgary IOMMU support . . |
| 44 |
> . . [*] Should Calgary be enabled by default? . . |
| 45 |
> . . [*] AMD IOMMU support . . |
| 46 |
> . . (32) Maximum number of CPUs (2-512) . . |
| 47 |
> . . [*] SMT (Hyperthreading) scheduler support . . |
| 48 |
> . . [*] Multi-core scheduler support . . |
| 49 |
> . . Preemption Model (Preemptible Kernel (Low-Latency Desktop)) ---> . . |
| 50 |
> . . [ ] Preemptible RCU . . |
| 51 |
> . . [*] Machine Check Exception . . |
| 52 |
> . . [*] Intel MCE features . . |
| 53 |
> . . [*] AMD MCE features . . |
| 54 |
> . . < > Dell laptop support . . |
| 55 |
> . . <M> /dev/cpu/microcode - microcode support . . |
| 56 |
> . . [*] Intel microcode patch loading support . . |
| 57 |
> . . [*] AMD microcode patch loading support . . |
| 58 |
> . . <*> /dev/cpu/*/msr - Model-specific register support . . |
| 59 |
> . . <*> /dev/cpu/*/cpuid - CPU information support . . |
| 60 |
> . . [ ] Numa Memory Allocation and Scheduler Support (EXPERIMENTAL) . . |
| 61 |
> . . Memory model (Sparse Memory) ---> . . |
| 62 |
> . . [*] Sparse Memory virtual memmap . . |
| 63 |
> . . *** Memory hotplug is currently incompatible with Software Suspend *** . . |
| 64 |
> . . [*] Add LRU list to track non-evictable pages . . |
| 65 |
> . . [ ] Check for low memory corruption . . |
| 66 |
> . . [*] Reserve low 64K of RAM on AMI/Phoenix BIOSen . . |
| 67 |
> . . [*] MTRR (Memory Type Range Register) support . . |
| 68 |
> . . [*] MTRR cleanup support . . |
| 69 |
> . . (0) MTRR cleanup enable value (0-1) . . |
| 70 |
> . . (1) MTRR cleanup spare reg num (0-7) . . |
| 71 |
> . . [ ] x86 PAT support . . |
| 72 |
> . . [ ] EFI runtime service support . . |
| 73 |
> . . [*] Enable seccomp to safely compute untrusted bytecode . . |
| 74 |
> . . Timer frequency (300 HZ) ---> . . |
| 75 |
> . . [*] kexec system call . . |
| 76 |
> . . [ ] kernel crash dumps . . |
| 77 |
> . . (0x200000) Physical address where the kernel is loaded . . |
| 78 |
> . . [ ] Build a relocatable kernel (EXPERIMENTAL) . . |
| 79 |
> . . -*- Support for hot-pluggable CPUs . . |
| 80 |
> . . [*] Compat VDSO support . . |
| 81 |
> . . [ ] Built-in kernel command line . . |
| 82 |
> . ......................... |
| 83 |
> |
| 84 |
> I'm sure there are things that should be left out of my kernel as my AMD probably doesn't support them or need them, but I |
| 85 |
> have left various things enabled where I wasn't sure. |
| 86 |
> |
| 87 |
> Any suggestions or thoughts are welcome. Like I said, I'm pretty sure it should have hyperthreading, but it doesn't show |
| 88 |
> it in the current configuration and all searches have yielded unhelpful results. |
| 89 |
|
| 90 |
AMD chips don't have hyperthreading, just hypertransport which is |
| 91 |
something completely different. If it did you'd see a processor 1 in |
| 92 |
cpuinfo. |
| 93 |
|
| 94 |
Wil |
Archives