bug#20843: 24.5; Profiler error: "Invalid sampling interval"

[Ken Brown]

On 6/18/2015 4:57 AM, Eli Zaretskii wrote:
> > From: Sebastien Vauban <sva-news@mygooglest.com>
> > Date: Thu, 18 Jun 2015 10:37:02 +0200
> >
> > When trying to start the profiler under Cygwin Emacs 24.5, I get this:
> >
> > --8<---------------cut here---------------start------------->8---
> > Debugger entered--Lisp error: (error "Invalid sampling interval")
> >    profiler-cpu-start(1000000)
> >    profiler-start(cpu)
> >    call-interactively(profiler-start record nil)
>
> Can you step with GDB into setup_cpu_timer, and see what goes wrong
> there?  I suspect this portions:
[...]

No, the problem is that Cygwin's setitimer supports only ITIMER_REAL, so 
the call to setitimer(ITIMER_PROF,...) in profiler.c:315 fails.

Ken