Re: Terminally slow (75 seconds) on some steps

Andrew Cagney
2003-07-18T21:56:29Z

> On Thu, 17 Jul 2003 12:34:42 -0400 Andrew Cagney <ac131313@redhat.com> wrote:
>
>
>> Is this a threaded program on GNU/Linux? 5.3 contained a major
>> performance improvement for threaded debugging.
>
>
> Threads are only planned. There is a lot of locks, but only one thread.
>
>
>> Also, something from April '02 is seriously old. Try either 5.3, or a
>> 6.0 snap (see http://www.gnu.org/software/gdb/download/)
>
>
> I have here Cvs HEAD and it gives 68->11 seconds improvement. It still
> isn't the same as outside debugger, but it's usable, especially because
> single-stepping is faster too.

11 seconds per step? Still painfully slow :-(

What exactly is the system your using? Can you capture
strace/ktrace/truss output for GDB doing a stepi?

By `locks' you mean? If the program is using lots of signals then,
again, its going to get slow - they have to go through GDB.

enjoy,
Andrew