Toru Nishimura wrote:

> > I was going to try profiling the same kernel on a 5000/240 and 5900-260
> > to try to get a handle on where to start looking for the fork/exec
> > slowness, but I'm having problems getting a profiled kernel built and
> > running.  With the trailing patches I at least get a kernel built, but
> > it barely starts and get's an interesting error on the way through:
> >
> >	[ ... kernel panics try to access address 0xf ... ]
> >
> > #define        MCOUNT_ENTER    s = _splhigh()
> > #define        MCOUNT_EXIT     _splx(s) 
> 
> If the profiler expects to disable and restore interrupts for short
> period of time, toggling MIPS_SR_INT_IE bit of status register is a
> handy way.

I'd still need to remember the status on the way in.  Maybe something
like

	#define MCOUNT_ENTER	s = _disable_intr()
	#define MCOUNT_EXIT	if (s) { _enable_intr() }

where _disable_intr clears MIPS_SR_INT_IE and returns its status and
_enable_intr sets MIPS_SR_INT_IE would be quicker?

Simon.