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Intel Hyper-Threading Technology


JoshCliffeJones
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Hello all!

 

My system has 2 x Intel Xeon E5-2418L processors that are 4 cores each with hyper threading to give each CPU a total of 8 threads per CPU.

 

Now, while these seem to work brilliantly, I wanted to ask if anyone out there can tell me why it appears that Xpenology doesn't seem to "see" the hyper threaded cores? If i open up HTOP in an SSH window, it shows 8 cores total which im assuming at this point are the 2 x 4 cores of each CPU.

 

Running "more /proc/cpuinfo" outputs what you see below showing the correct CPU, but only showing 4 cores.

 

processor : 0

vendor_id : GenuineIntel

cpu family : 6

model : 45

model name : Intel® Xeon® CPU E5-2418L 0 @ 2.00GHz

stepping : 7

microcode : 0x710

cpu MHz : 1200.000

cache size : 10240 KB

physical id : 0

siblings : 4

core id : 0

cpu cores : 4

apicid : 0

initial apicid : 0

fpu : yes

fpu_exception : yes

cpuid level : 13

wp : yes

flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx lahf_lm ida arat epb xsaveopt pln pts dtherm tpr_shadow vnmi flexpriority ept vpid

bogomips : 4000.31

clflush size : 64

cache_alignment : 64

address sizes : 46 bits physical, 48 bits virtual

power management:

 

 

Any help would be appreciated. :smile:

 

Kind Regards,

Josh

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Afaik Xpenology is limited to 4 cores

 

 

Posted via MyXpenology

 

Im not sure that is the case as i can see 8 cores total, 4 cores from each of the CPU's. Though i should be seeing double the total threads.

 

It may be something along the lines of a config file somewhere as i believe the most powerful appliance that Synology do is the RS18016xs+ https://www.synology.com/en-us/products/RS18016xs+ that has the Intel Xeon E3-1230 V2 CPU which is a quad core with hyper-threading to give it 8 threads total. http://ark.intel.com/products/65732/Intel-Xeon-Processor-E3-1230-v2-8M-Cache-3_30-GHz

 

Though i may be wrong! Hence why i thought i would see if anyone else knows. :smile:

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Xpenology can only see 8 cores. I have a 2630lv3 with hypertheading turned off so I use the real cores only.

 

Are you sure its not just a visual limitation in GUI? What does it show, with HT turned on, when you type cat /proc/cpuinfo into console?

 

I run mine inside ESXI vm with 4 cores set for this VM and it only shows 2 the website, but it still shows all 4 from console. So, it looks like a static preset value for some cpu that is used on real Syno boxes.

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