Dual core AMD64 4400+ X2 works fine on Abit AV8

[Alexander Konovalenko]

Recently I have upgraded my "old" AMD64 3000+ 1.8Ghz (running 5.4-STABLE 
amd64) to dual core AMD64 4400+ X2 2.2Ghz.

 So far everything works fine, I have not measured performance yet, but 
roughly one 4400+ core is 20% better than 3000+ from FFT-like floating point 
computations (double precision).
 I am used to run micromagnetic simulations (OOMMF), computationally intensive 
tasks consuming about 100Mb memory in my case. There is no much performance 
benefit in upgrade from 3000+ to 4400+, however 1Mb cache for each core, 
comparing with 512K cache, is pretty noticeable, especially when I run 2 
tasks at the same time.


What I did:

1) BIOS upgrade of my Abit AV8 matherboard to the latest v2.4 
(http://www.abit.com.tw/cpu_support/amd-athlonX2-t.htm), despite the 
instructions I did not do CMOS reset

2) recompiled and installed 5.4-STABLE kernel with "options SMP", then I 
tested it with old single core CPU

3) cpu replacement


dmesg:

CPU: AMD Athlon(tm) 64 X2 Dual Core Processor 4400+ (2247.42-MHz K8-class CPU)
  Origin = "AuthenticAMD"  Id = 0x20f32  Stepping = 2
Features=0x178bfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,C
MOV,PAT,PSE36,CLFLUSH,MMX,FXSR,SSE,SSE2,HTT>
  Features2=0x1<SSE3>
  AMD Features=0xe2500800<SYSCALL,NX,MMX+,<b25>,LM,3DNow+,3DNow>
  Hyperthreading: 2 logical CPUs
real memory  = 1073676288 (1023 MB)
avail memory = 1025105920 (977 MB)
ACPI APIC Table: <VIAK8T AWRDACPI>
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
 cpu0 (BSP): APIC ID:  0
 cpu1 (AP): APIC ID:  1
.....



/Alexander Konovalenko

+46-8-5537-8142 (office)
+46-7-3752-2116
http://daemon.nanophys.kth.se/~kono

Royal Institute of Technology (KTH)
Nanostructure Physics Department, Albanova
Roslagstullsbacken 21
10691 Stockholm
Sweden