PAGE_SIZE THREAD_SIZE STACKSIZE

如何查看Linux中的内存分布大小及线程大小及堆栈大小

1. PAGE_SIZE

   系统运行时，不能修改，如果要修改需要编译修改，执行make menuconfig

   <root@SYS-OPS-TOOLS /># getconf PAGESIZE
   4096

2. THREAD_SIZE

   不能手动修改，由PAGE_SIZE决定，具体代码地址如下

   https://elixir.bootlin.com/linux/v5.14.14/source/arch/x86/include/asm/page_64_types.h#L16

3. STACKSIZE

   ulimit是针对每个用户而设置的参数，用户级别的

   <root@SYS-OPS-TOOLS /># ulimit -s
   8192
   <root@SYS-OPS-TOOLS /># ulimit -a
   core file size          (blocks, -c) 0
   data seg size           (kbytes, -d) unlimited
   scheduling priority             (-e) 0
   file size               (blocks, -f) unlimited
   pending signals                 (-i) 15063
   max locked memory       (kbytes, -l) 64
   max memory size         (kbytes, -m) unlimited
   open files                      (-n) 1000000
   pipe size            (512 bytes, -p) 8
   POSIX message queues     (bytes, -q) 819200
   real-time priority              (-r) 0
   stack size              (kbytes, -s) 8192
   cpu time               (seconds, -t) unlimited
   max user processes              (-u) 15063
   virtual memory          (kbytes, -v) unlimited
   file locks                      (-x) unlimited