Re: [dpdk-dev] [PKTGEN] fixing weird termio issues that complicate debugging

[Stephen Hemminger <stephen@networkplumber.org>]

On Thu, 21 Jan 2016 15:03:37 +0000
"Wiles, Keith" <keith.wiles@intel.com> wrote:

> On 1/21/16, 2:46 AM, "Panu Matilainen" <pmatilai@redhat.com> wrote:
> 
> >On 01/20/2016 06:26 PM, Wiles, Keith wrote:
> >> On 1/20/16, 12:32 AM, "dev on behalf of Matthew Hall" <dev-bounces@dpdk.org on behalf of mhall@mhcomputing.net> wrote:
> >>
> >>> Hello,
> >>>
> >>> Since the pktgen code is reindented I am finding time to read through it
> >>> and experiment and see if I can get it working.
> >>>
> >>> I have issues with the init process of pktgen. It is difficult to debug
> >>> it because the init code does a lot of very scary stuff to the terminal
> >>> control / TTY device at inconvenient times in an inconvenient order, and
> >>> in the process damages the debug output and damages the screen of your
> >>> GDB without doing weird things to run GDB on a different TTY.
> >>>
> >>> Of course I am willing to contribute patches and not just complain, but
> >>> first I need some help to follow what is going on.
> >>>
> >>> Here is the problematic call-flow with some explanation what went wrong
> >>> trying it on some community machines outside of its original environment:
> >>>
> >>> 1) it calls printf("\n%s %s\n", wr_copyright_msg(), wr_powered_by());
> >>> which dumps tons of weird boilerplate of licenses, copyrights, code
> >>> creator, etc.
> >>>
> >>> It is open source and everybody that matters already knows who coded it,
> >>> so is this stuff really that important? This gets in the way when you
> >>> are trying to work on it and I just have to comment it out.
> >>
> >> One problem is a number of people wanted to steal the code and use in
> >> a paid application, so the copyright is some what a requirement.
> >
> >In that case, why is it under a BSD'ish license instead of something 
> >like GPL that's designed to prevent it in the first place? Might be too 
> >late to change it by now, just wondering.
> 
> DPDK is BSD, so you can not use a GPL application with DPDK (I think) anyway I can try to speed you the screens, but does it really matter as these are only at startup and I normally leave pktgen running for long periods of time. The extra time at the start does not seem to be a big issue, right?
> 
> >
> >> As you may know I do a lot of debugging on Pktgen and I feel they are
> >> a nuisance. I can try to see if we can clean up these messages, but
> >> do not hold your breath on getting them to be removed.
> >
> >It would make a world of difference if it just printed the copyright etc 
> >in a couple of lines during startup, instead of taking over the entire 
> >screen for several seconds.
> >
> >This is a whole lot like those anti-piracy ad campaigns on DVDs which 
> >you cant skip, so all the *legitimate* users are forced to suffer 
> >through them but all the bad guys just rip it out of their copies. DRM 
> >that ends up hurting the legitimate users the most is never a good idea.
> >
> >	- Panu -
> >
> >
> >
> 
> 
> Regards,
> Keith

I would rip out the whole tty control and theming nonsense and then
just print one line copyright on startup.