Ubuntu - 如何判断 CPU 应用程序当前正在使用 AVX 还是 SSE？

Question

我当前运行 BOINC 跨多个具有 GPU 的服务器。

服务器运行 GPU 和 CPU BOINC 应用程序。

由于 AVX 和 SSE 在 CPU 应用程序中使用时会降低 CPU 频率，我必须选择 CPU/GPU 我运行一起使用，因为一些 GPU 应用程序会出现瓶颈（运行完成时间较慢），而其他应用程序则不会。

目前一些 CPU 应用被命名，以便清楚地看到它们是否使用 AVX，但大多数没有。

因此，有没有我可以运行的任何命令，以及一些查看方式，以查看当前运行ning 中是否有任何 CPU 应用正在使用 AVX 或 SSE（任何版本）？

另请注意，我是否应该以相同的方式对待任何 FMA 的使用（例如，它是否会因 CPU 温度升高而减慢 CPU 频率）？

谢谢

Answer 1

您可以使用 perf top 查看实时执行的 AVX 和 SSE 指令数以及可执行文件和共享库名称：

perf top -e fp_arith_inst_retired.128b_packed_single -e fp_arith_inst_retired.128b_packed_double -e fp_arith_inst_retired.256b_packed_single -e fp_arith_inst_retired.256b_packed_double

计数器描述（来自 Intel Coffee Lake CPU 上的 perf list 输出）：

floating point:
  fp_arith_inst_retired.128b_packed_double          
       [Number of SSE/AVX computational 128-bit packed double precision floating-point instructions retired. Each count represents 2 computations. Applies to SSE* and AVX*
        packed double precision floating-point instructions: ADD SUB MUL DIV MIN MAX SQRT DPP FM(N)ADD/SUB. DPP and FM(N)ADD/SUB instructions count twice as they perform
        multiple calculations per element]
  fp_arith_inst_retired.128b_packed_single          
       [Number of SSE/AVX computational 128-bit packed single precision floating-point instructions retired. Each count represents 4 computations. Applies to SSE* and AVX*
        packed single precision floating-point instructions: ADD SUB MUL DIV MIN MAX RCP RSQRT SQRT DPP FM(N)ADD/SUB. DPP and FM(N)ADD/SUB instructions count twice as they
        perform multiple calculations per element]
  fp_arith_inst_retired.256b_packed_double          
       [Number of SSE/AVX computational 256-bit packed double precision floating-point instructions retired. Each count represents 4 computations. Applies to SSE* and AVX*
        packed double precision floating-point instructions: ADD SUB MUL DIV MIN MAX SQRT DPP FM(N)ADD/SUB. DPP and FM(N)ADD/SUB instructions count twice as they perform
        multiple calculations per element]
  fp_arith_inst_retired.256b_packed_single          
       [Number of SSE/AVX computational 256-bit packed single precision floating-point instructions retired. Each count represents 8 computations. Applies to SSE* and AVX*
        packed single precision floating-point instructions: ADD SUB MUL DIV MIN MAX RCP RSQRT SQRT DPP FM(N)ADD/SUB. DPP and FM(N)ADD/SUB instructions count twice as they
        perform multiple calculations per element]
  fp_arith_inst_retired.scalar_double               
       [Number of SSE/AVX computational scalar double precision floating-point instructions retired. Each count represents 1 computation. Applies to SSE* and AVX* scalar double
        precision floating-point instructions: ADD SUB MUL DIV MIN MAX SQRT FM(N)ADD/SUB. FM(N)ADD/SUB instructions count twice as they perform multiple calculations per element]
  fp_arith_inst_retired.scalar_single               
       [Number of SSE/AVX computational scalar single precision floating-point instructions retired. Each count represents 1 computation. Applies to SSE* and AVX* scalar single
        precision floating-point instructions: ADD SUB MUL DIV MIN MAX RCP RSQRT SQRT FM(N)ADD/SUB. FM(N)ADD/SUB instructions count twice as they perform multiple calculations
        per element]
  fp_assist.any                                     
       [Cycles with any input/output SSE or FP assist]

Ubuntu - 如何判断 CPU 应用程序当前正在使用 AVX 还是 SSE？

Ubuntu - how to tell if AVX or SSE, is current being used by CPU app?

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