On 2020.03.27 12:20, tu...@posteo.de wrote:
Hi,
still not 100% sure, whether I configured the kernel correctlu:
Running an AMD RYZEN 5 3600...
lscpu displays:
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
Address sizes: 43 bits physical, 48 bits virtual
CPU(s): 6
On-line CPU(s) list: 0-5
Thread(s) per core: 1 <<<<<<
Core(s) per socket: 6
Socket(s): 1
Vendor ID: AuthenticAMD
CPU family: 23
Model: 113
Model name: AMD Ryzen 5 3600 6-Core Processor
Stepping: 0
...
The accoring part of lshw shows:
*-cpu
description: CPU
product: AMD Ryzen 5 3600 6-Core Processor
vendor: Advanced Micro Devices [AMD]
physical id: 15
bus info: cpu@0
version: AMD Ryzen 5 3600 6-Core Processor
serial: Unknown
slot: AM4
size: 3649MHz
capacity: 4200MHz
width: 64 bits
clock: 100MHz
capabilities: x86-64 fpu fpu_exception wp vme de pse tsc
msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr
sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp constant_tsc
rep_good nopl nonstop_tsc cpuid extd_apicid aperfmperf pni pclmulqdq
monitor ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c
rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a
misalignsse 3dnowprefetch osvw ibs skinit wdt tce topoext
perfctr_core perfctr_nb bpext perfctr_llc mwaitx cpb cat_l3 cdp_l3
hw_pstate sme ssbd mba sev ibpb stibp vmmcall fsgsbase bmi1 avx2 smep
bmi2 cqm rdt_a rdseed adx smap clflushopt clwb sha_ni xsaveopt xsavec
xgetbv1 xsaves cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local
clzero irperf xsaveerptr rdpru wbnoinvd arat npt lbrv svm_lock
nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter
pfthreshold avic v_vmsave_vmload vgif umip rdpid overflow_recov
succor smca cpufreq
configuration: cores=6 enabledcores=6 threads=12
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
I set (beside other things) these kernel configurations:
Processor type and features --->
[*] Symmetric multi-processing support
[*] AMD ACPI2Platform devices support
[*] Supported processor vendors --->
[*] Support AMD processors
[*] SMT (Hyperthreading) scheduler support
[*] Multi-core scheduler support
Preemption Model (Preemptible Kernel (Low-Latency Desktop))
--->
[*] Machine Check / overheating reporting
[*] AMD MCE features
Performance monitoring --->
<*> AMD Processor Power Reporting Mechanism
[*] AMD microcode loading support
Power management and ACPI options --->
CPU Frequency scaling --->
<*> AMD Opteron/Athlon64 PowerNow!
<*> AMD frequency sensitivity feedback powersave bias
Device Drivers --->
[*] IOMMU Hardware Support --->
[*] AMD IOMMU support
<*> AMD IOMMU Version 2 driver
htop shows six cores.
Does my CPU hyperthread?
Cheers
Meino
I have a Ryzen 5 2600 and an MSI B350 Tomahawk, and I show 12 threads
in htop. I'll look in my own BIOS next reboot, but dmidecode shows me:
Processor Information
Socket Designation: AM4
Type: Central Processor
Family: Zen
Manufacturer: Advanced Micro Devices, Inc.
ID: 82 0F 80 00 FF FB 8B 17
Signature: Family 23, Model 8, Stepping 2
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)
MMX (MMX technology supported)
FXSR (FXSAVE and FXSTOR instructions supported)
SSE (Streaming SIMD extensions)
SSE2 (Streaming SIMD extensions 2)
HTT (Multi-threading)
Version: AMD Ryzen 5 2600 Six-Core Processor
Voltage: 1.1 V
External Clock: 100 MHz
Max Speed: 3900 MHz
Current Speed: 3400 MHz
Status: Populated, Enabled
Upgrade: Socket AM4
L1 Cache Handle: 0x0011
L2 Cache Handle: 0x0012
L3 Cache Handle: 0x0013
Serial Number: Unknown
Asset Tag: Unknown
Part Number: Unknown
Core Count: 6
Core Enabled: 6
Thread Count: 12
Characteristics:
64-bit capable
Multi-Core
Hardware Thread
Execute Protection
Enhanced Virtualization
Power/Performance Control
which does suggest there might be a BIOS setting involved.
Jack
