cvs commit: src/sys/kern init_sysent.c kern_device.c lwkt_msgport.c makesyscalls.sh syscalls.c

[Matthew Dillon]

dillon      2003/07/24 16:52:38 PDT

  Modified files:
    sys/kern             init_sysent.c kern_device.c 
                         lwkt_msgport.c makesyscalls.sh syscalls.c 
  Log:
  Syscall messaging work 2: Continue with the implementation of sendsys(),
  using int 0x81.  This entry point will be responsible for sending system
  call messages or waiting for messages / port activity.
  
  With this commit system call messages can be run through 0x81 but at the
  moment they will always run synchronously. Here's the core interface
  code for IA32:
  
      static __inline int
      sendsys(void *port, void *msg, int msgsize)
      {
  	int error;
  	__asm __volatile("int $0x81" : "=a"(error) :
  			"a"(port), "c"(msg), "d"(msgsize) : "memory");
  	return(error);
      }
  
  Performance verses a direct system call is currently excellent considering
  that this is my initial attempt.
  
  		600MHzC3	1.2GHzP3x2(SMP)
  
  getuid()	1300 ns		 909 ns
  getuid_msg()	1700 ns		1077 ns
  
  Revision  Changes    Path
  1.5       +0 -0      src/sys/kern/init_sysent.c
  1.3       +2 -2      src/sys/kern/kern_device.c
  1.3       +11 -4     src/sys/kern/lwkt_msgport.c
  1.6       +4 -0      src/sys/kern/makesyscalls.sh
  1.5       +0 -0      src/sys/kern/syscalls.c