Re: more on gdb server

[Quality Quorum <qqi at world dot std dot com>]

On 18 Jul 2001, J.T. Conklin wrote:

> > > I know HP were once playing with ideas that would have eliminated any 
> > > copying because they were finding memory read/write performance using 
> > > ptrace (or what ever) lacking.
> > 
> > I would suppose they had something truly unusual - debuggin is going with 
> > the pace of human reaction to debugging events and I can hardly imagine
> > that network performance over local loop interface would be a factor here.
> 
> Remember that GDB may be issuing many low level commands for each high
> level (CLI) command.  For example, a single step or next command may
> issue several step instruction, fetch registers, and store registers
> commands.  On some large programs, some interactive commands are
> beyond the interactive threshold (something like .3 seconds?  I can't
> remember the commonly quoted figure), this additional overhead would
> only make it worse.
> 
> Also note that oftentimes it's not a human driving the debugging
> session, but user defined functions that grovel through data
> structures, call inferior functions, etc.

I still have hard time to beleive that there is an issue here.

>         --jtc

Thanks,

Aleksey