Re: [hwloc-users] Puzzled by the number of cores on i5-7500

2018-01-25 Thread Olivier Cessenat 
I assume you need other people to answer as well, but here is what I get:

$ sysctl -a | grep ^hw
hw.ncpu: 4
hw.byteorder: 1234
hw.memsize: 8589934592
hw.activecpu: 4
hw.physicalcpu: 4
hw.physicalcpu_max: 4
hw.logicalcpu: 4
hw.logicalcpu_max: 4
hw.cputype: 7
hw.cpusubtype: 8
hw.cpu64bit_capable: 1
hw.cpufamily: 260141638
hw.cacheconfig: 4 1 1 4 0 0 0 0 0 0
hw.cachesize: 8589934592 32768 262144 6291456 0 0 0 0 0 0
hw.pagesize: 4096
hw.pagesize32: 4096
hw.busfrequency: 1
hw.busfrequency_min: 1
hw.busfrequency_max: 1
hw.cpufrequency: 34
hw.cpufrequency_min: 34
hw.cpufrequency_max: 34
hw.cachelinesize: 64
hw.l1icachesize: 32768
hw.l1dcachesize: 32768
hw.l2cachesize: 262144
hw.l3cachesize: 6291456
hw.tbfrequency: 10
hw.packages: 1
hw.optional.floatingpoint: 1
hw.optional.mmx: 1
hw.optional.sse: 1
hw.optional.sse2: 1
hw.optional.sse3: 1
hw.optional.supplementalsse3: 1
hw.optional.sse4_1: 1
hw.optional.sse4_2: 1
hw.optional.x86_64: 1
hw.optional.aes: 1
hw.optional.avx1_0: 1
hw.optional.rdrand: 1
hw.optional.f16c: 1
hw.optional.enfstrg: 1
hw.optional.fma: 1
hw.optional.avx2_0: 1
hw.optional.bmi1: 1
hw.optional.bmi2: 1
hw.optional.rtm: 1
hw.optional.hle: 1
hw.optional.adx: 1
hw.optional.mpx: 0
hw.optional.sgx: 0
hw.optional.avx512f: 0
hw.optional.avx512cd: 0
hw.optional.avx512dq: 0
hw.optional.avx512bw: 0
hw.optional.avx512vl: 0
hw.optional.avx512ifma: 0
hw.optional.avx512vbmi: 0
hw.targettype: Mac

$ sysctl -a | grep ^machdep.cpu
machdep.cpu.max_basic: 22
machdep.cpu.max_ext: 2147483656
machdep.cpu.vendor: GenuineIntel
machdep.cpu.brand_string: Intel(R) Core(TM) i5-7500 CPU @ 3.40GHz
machdep.cpu.family: 6
machdep.cpu.model: 158
machdep.cpu.extmodel: 9
machdep.cpu.extfamily: 0
machdep.cpu.stepping: 9
machdep.cpu.feature_bits: 9221960262849657855
machdep.cpu.leaf7_feature_bits: 43806655
machdep.cpu.extfeature_bits: 1241984796928
machdep.cpu.signature: 591593
machdep.cpu.brand: 0
machdep.cpu.features: FPU VME DE PSE TSC MSR PAE MCE CX8 APIC SEP MTRR PGE MCA 
CMOV PAT PSE36 CLFSH DS ACPI MMX FXSR SSE SSE2 SS HTT TM PBE SSE3 PCLMULQDQ 
DTES64 MON DSCPL VMX SMX EST TM2 SSSE3 FMA CX16 TPR PDCM SSE4.1 SSE4.2 x2APIC 
MOVBE POPCNT AES PCID XSAVE OSXSAVE SEGLIM64 TSCTMR AVX1.0 RDRAND F16C
machdep.cpu.leaf7_features: SMEP ERMS RDWRFSGS TSC_THREAD_OFFSET BMI1 HLE AVX2 
BMI2 INVPCID RTM SMAP RDSEED ADX IPT SGX FPU_CSDS MPX CLFSOPT
machdep.cpu.extfeatures: SYSCALL XD 1GBPAGE EM64T LAHF LZCNT PREFETCHW RDTSCP 
TSCI
machdep.cpu.logical_per_package: 16
machdep.cpu.cores_per_package: 8
machdep.cpu.microcode_version: 88
machdep.cpu.processor_flag: 1
machdep.cpu.mwait.linesize_min: 64
machdep.cpu.mwait.linesize_max: 64
machdep.cpu.mwait.extensions: 3
machdep.cpu.mwait.sub_Cstates: 1319200
machdep.cpu.thermal.sensor: 1
machdep.cpu.thermal.dynamic_acceleration: 1
machdep.cpu.thermal.invariant_APIC_timer: 1
machdep.cpu.thermal.thresholds: 2
machdep.cpu.thermal.ACNT_MCNT: 1
machdep.cpu.thermal.core_power_limits: 1
machdep.cpu.thermal.fine_grain_clock_mod: 1
machdep.cpu.thermal.package_thermal_intr: 1
machdep.cpu.thermal.hardware_feedback: 0
machdep.cpu.thermal.energy_policy: 1
machdep.cpu.xsave.extended_state: 31 832 1088 0
machdep.cpu.xsave.extended_state1: 15 832 256 0
machdep.cpu.arch_perf.version: 4
machdep.cpu.arch_perf.number: 8
machdep.cpu.arch_perf.width: 48
machdep.cpu.arch_perf.events_number: 7
machdep.cpu.arch_perf.events: 0
machdep.cpu.arch_perf.fixed_number: 3
machdep.cpu.arch_perf.fixed_width: 48
machdep.cpu.cache.linesize: 64
machdep.cpu.cache.L2_associativity: 4
machdep.cpu.cache.size: 256
machdep.cpu.tlb.inst.large: 8
machdep.cpu.tlb.data.small: 64
machdep.cpu.tlb.data.small_level1: 128
machdep.cpu.address_bits.physical: 39
machdep.cpu.address_bits.virtual: 48
machdep.cpu.core_count: 4
machdep.cpu.thread_count: 4
machdep.cpu.tsc_ccc.numerator: 284
machdep.cpu.tsc_ccc.denominator: 2

$ lstopo -
Machine (8192MB total) + NUMANode L#0 (P#0 8192MB) + L3 L#0 (6144KB)
  Core L#0
L2 L#0 (256KB) + L1d L#0 (32KB) + L1i L#0 (32KB) + PU L#0 (P#0)
L2 L#1 (256KB) + L1d L#1 (32KB) + L1i L#1 (32KB) + PU L#1 (P#1)
  Core L#1
L2 L#2 (256KB) + L1d L#2 (32KB) + L1i L#2 (32KB) + PU L#2 (P#2)
L2 L#3 (256KB) + L1d L#3 (32KB) + L1i L#3 (32KB) + PU L#3 (P#3)



> Le 25 janv. 2018 à 19:18, Brice Goglin  a écrit :
> 
> lstopo -

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Re: [hwloc-users] Puzzled by the number of cores on i5-7500

2018-01-25 Thread Brice Goglin 
It looks like our Mac OS X backend doesn't properly handle processors
that support hyperthreading without actually having hyperthreads enabled
in hardware. Your processor has 4-core without HT but it's based on a
processor with up to 8 cores and 16 threads. Our current code uses the
latter and therefore wrongly assume you have HT cores, hence reporting 2
HT cores instead of 4 noHT cores.

I guess we would also be wrong if some cores or HT are disabled in
software in Mac OS X.


Anybody reading this from a Mac, could you send the output of these
commands on your machine?
sysctl -a | grep ^hw
sysctl -a | grep ^machdep.cpu
lstopo -

Brice



>
>
> Le 25/01/2018 à 07:14, Olivier Cessenat a écrit :
>> Hello,
>>
>> I’m puzzled by the report from lstopo about the number of physical
>> cores on an iMac with
>> I5-7500. It is specified by Intel as a quad core processor and lstopo
>> reports only 2 cores:
>> lstopo
>> <<
>> Machine (8192MB total) + NUMANode L#0 (P#0 8192MB) + L3 L#0 (6144KB)
>>   Core L#0
>>     L2 L#0 (256KB) + L1d L#0 (32KB) + L1i L#0 (32KB) + PU L#0 (P#0)
>>     L2 L#1 (256KB) + L1d L#1 (32KB) + L1i L#1 (32KB) + PU L#1 (P#1)
>>   Core L#1
>>     L2 L#2 (256KB) + L1d L#2 (32KB) + L1i L#2 (32KB) + PU L#2 (P#2)
>>     L2 L#3 (256KB) + L1d L#3 (32KB) + L1i L#3 (32KB) + PU L#3 (P#3)
>> >>
>> When running system_profiler SPHardwareDataType
>> I obtain:
>> <<
>> Hardware:
>>
>>     Hardware Overview:
>>
>>       Model Name: iMac
>>       Model Identifier: iMac18,3
>>       Processor Name: Intel Core i5
>>       Processor Speed: 3,4 GHz
>>       Number of Processors: 1
>>       Total Number of Cores: 4
>>       L2 Cache (per Core): 256 KB
>>       L3 Cache: 6 MB
>>       Memory: 8 GB
>>       Boot ROM Version: IM183.0151.B00
>>       SMC Version (system): 2.41f1
>>       Serial Number (system): DGKV7HJCJ1GN
>>       Hardware UUID: 3FDAD77B-F4E8-50AB-B0FF-AA5C41CA35FA
>> >>
>>
>> Is there a trick ?
>>
>> Thanks for you help,
>>
>> Olivier Cessenat
>>
>>
>>
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>

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