On Mon, Mar 21, 2016 at 09:26:43AM +0100, Borislav Petkov wrote: > On Mon, Mar 21, 2016 at 11:46:19AM +0800, Huang Rui wrote: > > I quickly applied this patch on tip/master with on a fam15h machine. > > The issue is still existed, only one core can be detected. > > Huh, what? > > So that 6386 has 16 cores, according to wikipedia, that must be 8 > compute units. Correct? >
Yes, there are two sockets in this platform. 32 cores and 16 compute units. > Are you saying, you have only one core in /proc/cpuinfo? > > Can you send full dmesg please? > Apology to bring a surprise. Our test machine didn't configure the CONFIG_SMP just now because it was to reproduce another build issue before... So an incorrect "only one" core is detected, sorry. Please ignore previous result. I will do more testing on other platforms. Now I re-build system, please see the correct message: ray@hr-ub:~/tip$ cat /sys/devices/system/cpu/cpu2/topology/thread_siblings_list 2-3 ray@hr-ub:~/tip$ cat /sys/devices/system/cpu/cpu2/topology/core_siblings_list 0-15 processor : 31 vendor_id : AuthenticAMD cpu family : 21 model : 2 model name : AMD Opteron(tm) Processor 6386 SE stepping : 0 microcode : 0x6000822 cpu MHz : 1400.000 cache size : 2048 KB physical id : 1 siblings : 16 core id : 7 cpu cores : 8 apicid : 79 initial apicid : 47 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 mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl nonstop_tsc extd_apicid amd_dcm aperfmperf eagerfpu pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 popcnt aes xsave avx f16c lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs xop skinit wdt lwp fma4 tce nodeid_msr tbm topoext perfctr_core perfctr_nb cpb hw_pstate vmmcall bmi1 arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold bugs : fxsave_leak sysret_ss_attrs bogomips : 5585.90 TLB size : 1536 4K pages clflush size : 64 cache_alignment : 64 address sizes : 48 bits physical, 48 bits virtual power management: ts ttp tm 100mhzsteps hwpstate cpb eff_freq_ro Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian CPU(s): 32 On-line CPU(s) list: 0-31 Thread(s) per core: 2 Core(s) per socket: 8 Socket(s): 2 NUMA node(s): 4 Vendor ID: AuthenticAMD CPU family: 21 Model: 2 Stepping: 0 CPU MHz: 1400.000 BogoMIPS: 5585.90 Virtualization: AMD-V L1d cache: 16K L1i cache: 64K L2 cache: 2048K L3 cache: 6144K NUMA node0 CPU(s): 0-7 NUMA node1 CPU(s): 8-15 NUMA node2 CPU(s): 16-23 NUMA node3 CPU(s): 24-31 Thanks, Rui
