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Java Mission Control shows incorrect number of cores #10

Open REASY opened 5 years ago

REASY commented 5 years ago

The output from sudo lshw shows that there are two CPUs with 24 cores each, in total 48 physical cores (full link to the output]:

     *-cpu:0
          description: CPU
          product: Intel(R) Xeon(R) Platinum 8175M CPU @ 2.50GHz
          vendor: Intel Corp.
          physical id: 4
          bus info: cpu@0
          version: Intel(R) Xeon(R) Platinum 8175M CPU @ 2.50GHz
          slot: CPU 0
          size: 2500MHz
          capacity: 3500MHz
          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 ss ht syscall nx pdpe1gb rdtscp constant_tsc arch_perfmon rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq monitor ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch invpcid_single kaiser fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx avx512f rdseed adx smap clflushopt clwb avx512cd xsaveopt xsavec xgetbv1 ida arat
          configuration: cores=24 enabledcores=24 threads=48
     *-cpu:1
          description: CPU
          product: Intel(R) Xeon(R) Platinum 8175M CPU @ 2.50GHz
          vendor: Intel Corp.
          physical id: 5
          bus info: cpu@1
          version: Intel(R) Xeon(R) Platinum 8175M CPU @ 2.50GHz
          slot: CPU 1
          size: 2500MHz
          capacity: 3500MHz
          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 ss ht syscall nx pdpe1gb rdtscp constant_tsc arch_perfmon rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq monitor ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch invpcid_single kaiser fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx avx512f rdseed adx smap clflushopt clwb avx512cd xsaveopt xsavec xgetbv1 ida arat
          configuration: cores=24 enabledcores=24 threads=48

But in Oracle® Java Mission Control 5.5.2 (M5.5.2-3, 174165) I can see 32 cores image

Link to the JFR recording: https://drive.google.com/open?id=1-RPSymnJeHBgApdUL6Xrr_e-9OATfXK9

thegreystone commented 5 years ago

Hi there! This should be reported on OpenJDK hotspot/jfr!