编译和安装

操作步骤

1. 执行以下命令解压安装包。

   cd /path/to/GPTL
   tar xf GPTL-8.1.1.tar.gz
   cd GPTL-8.1.1

2. 执行以下命令修改相关文件。
   1. 修改gptl.c

      vim src/gptl.c

      修改第3070行，将asm volatile ("rdtsc":"=a" (a), "=d" (d));替换为以下内容。

      Description: __asm__ __volatile__ ("rdtsc" : "=a" (lo), "=d" (hi))
      Suggestion: static uint64_t Rdtsc()
      {
      uint64_t count_num;
      Current_Speed = 2400; // Current Speed =2400MHz
      External_Clock = 100; // External Clock = 100MHz
      __asm__ __volatile__ ("mrs %0, cntvct_el0" : "=r" (count_num));
      return count_num * (Current_Speed / External_Clock);
      }

      修改第3083行，将_asm__ __volatile__("rdtsc":"=A" (val): );替换为以下内容。

      Description: __asm__ __volatile__ ("rdtsc" : "=a" (lo), "=d" (hi))
      Suggestion: static uint64_t Rdtsc()
      {
      uint64_t count_num;
      Current_Speed = 2400; // Current Speed =2400MHz
      External_Clock = 100; // External Clock = 100MHz
      __asm__ __volatile__ ("mrs %0, cntvct_el0" : "=r" (count_num));
      return count_num * (Current_Speed / External_Clock);
      }

   2. 修改Makefile。

      vim src/unsupported_utils/cprsummary/Makefile

      将第2行改成CFLAGS = -march=armv8.2-a

      vim src/unsupported_utils/loadbal/Makefile

      将第2行改成CFLAGS = -march=armv8.2-a

   3. 修改libtool。

      vim /path/to/GPTL/GPTL-8.1.1/libtool

      将第330行改为wl=”-Wl,”

      将第11688行改为wl=”-Wl,”

3. 执行以下命令生成makefile。

   ./configure --enable-debug --enable-libunwind --prefix=/path/to/GPTL

4. 执行以下命令编译安装。

   make
   make install

5. 执行以下命令设置环境变量。

   export PATH=/path/to/GPTL/bin:$PATH
   export LD_LIBRARY_PATH=/path/to/GPTL/lib:$LD_LIBRARY_PATH