CPU(s):64 = the number of logical cores = “Thread(s) per core” × “Core(s) per socket” × “Socket(s)” = 1 * 32 * 2
One socket is one physical CPU package (which occupies one socket on the motherboard);
each socket hosts a number of physical cores, and each core can run one or more threads.
In this case, you have two sockets, each containing a 32-core AMD EPYC 7452 CPU, and since that not supports hyper-threading, each core just run a thread.
syscall: SYSCALL (Fast System Call) and SYSRET (Return From Fast System Call) nx：执行禁用 # NX 位（不执行）是 CPU 中使用的一项技术，用于分隔内存区域，以供处理器指令（代码）存储或数据存储使用 mmxext: AMD MMX extensions fxsr_opt: FXSAVE/FXRSTOR optimizations pdpe1gb: One GB pages (allows hugepagesz=1G) rdtscp: Read Time-Stamp Counter and Processor ID lm: Long Mode (x86-64: amd64, also known as Intel 64, i.e. 64-bit capable)
constant_tsc：TSC(Time Stamp Counter) 以恒定速率滴答 art: Always-Running Timer rep_good：rep 微码运行良好 nopl: The NOPL (0F 1F) instructions # NOPL is long-sized bytes "do nothing" operation nonstop_tsc: TSC does not stop in C states extd_apicid: has extended APICID (8 bits) (Advanced Programmable Interrupt Controller) aperfmperf: APERFMPERF # On x86 hardware, APERF and MPERF are MSR registers that can provide feedback on current CPU frequency. eagerfpu: Non lazy FPU restore
Intel-defined CPU features, CPUID level 0x00000001 (ecx)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
pni: SSE-3 (“2004年,新内核Prescott New Instructions”) pclmulqdq: 执行四字指令的无进位乘法 - GCM 的加速器） monitor: Monitor/Mwait support (Intel SSE3 supplements) ssse3：补充 SSE-3 fma：融合乘加 cx16: CMPXCHG16B # double-width compare-and-swap (DWCAS) implemented by instructions such as x86 CMPXCHG16B sse4_1：SSE-4.1 sse4_2：SSE-4.2 x2apic: x2APIC movbe：交换字节指令后移动数据 popcnt：返回设置为1指令的位数的计数（汉明权，即位计数） aes/aes-ni：高级加密标准（新指令） xsave：保存处理器扩展状态：还提供 XGETBY、XRSTOR、XSETBY avx：高级矢量扩展 f16c：16 位 fp 转换 (CVT16) rdrand：从硬件随机数生成器指令中读取随机数
More extended AMD flags: CPUID level 0x80000001, ecx
