GSoC Project | Basic Support for Trace Compass

[Ravindra Kumar Meena]

Hi Sebastian,

I followed https://diamon.org/ctf/ and tried to code. I forked the
rtems-tools and made a commit.
https://github.com/rmeena840/rtems-tools/commit/e1917f5afeba051e4e87285eed9e36b2591dc643

Please have a look and let me know if I am going in the right direction.


I would like to ask one thing that at 5.1 of https://diamon.org/ctf/  it is
mentioned that "trace.packet.header" is required. Since, It was not there I
was getting error at:

trace {
    /* ... */
    packet.header := struct event_packet_header;
};

Is there any need requirement of file or library?


On Mon, May 20, 2019 at 11:23 AM Sebastian Huber <
sebastian.huber at embedded-brains.de> wrote:

> On 20/05/2019 07:46, Ravindra Kumar Meena wrote:
> > On Thu, May 16, 2019 at 2:54 PM Sebastian Huber
> > <sebastian.huber at embedded-brains.de
> > <mailto:sebastian.huber at embedded-brains.de>> wrote:
> >
> >     On 16/05/2019 11:05, Ravindra Kumar Meena wrote:
> >
> >     The record data format is described in
> >     cpukit/include/rtems/recorddata.h. If you think this documentation is
> >     insufficient, unclear and needs to be improved, then please do
> >     this as
> >     part of the project.
> >
> >
> > I can see there is a fixed set of 512 system reserved and 512
> > user-defined events. The total size of the record i item is 32 bits
> > out of which 10 bits are allocated to the event and 22 bits are
> > allocated to timestamps. The record item is defined in two formats 32
> > and 64 bits.
>
> Yes, the target depends if the data member is 32-bits or 64-bits. The
> reason for this is that we need enough space to store pointers.
>
> >
> >     With the Qemu simulation you set up during the project proposal,
> >     you are
> >     able to get a TCP stream of record items from the Qemu target to your
> >     host. You also have an example client which sorts this stream,
> >     determines the timestamps and prints the items.
> >
> >
> > The stream print function is defined at
> > rtems-tools/misc/record/record-main.c inside function "static void
> > print_item( FILE *f, const client_item *item )".  This function prints
> > the TCP stram.
>
> Yes.
>
> >
> >     Your job is now to convert the record item stream into a CTF stream.
> >
> >
> > In order to convert to CTF, we need to know the structure of it. I
> > followed this page https://diamon.org/ctf/. The CTF stream packet has
> > three major parts header, context, concatenated events(header,
> > stream-specific context, event-specific context, payload).
>
> Yes.
>
> >
> > *I would like to point out one thing that I recently pulled the
> > rtems-libbsd and tried to build it again. The build fails due to
> > recent commits made in the master branch(after the commits "Update due
> > to API changes").*
>
> If you update rtems-libbsd, then also update rtems and build the BSP
> again, then build the libbsd.
>
> > *
> > *
> > Thanks
> >
> >
> >
> >     --
> >     Sebastian Huber, embedded brains GmbH
> >
> >     Address : Dornierstr. 4, D-82178 Puchheim, Germany
> >     Phone   : +49 89 189 47 41-16
> >     Fax     : +49 89 189 47 41-09
> >     E-Mail  : sebastian.huber at embedded-brains.de
> >     <mailto:sebastian.huber at embedded-brains.de>
> >     PGP     : Public key available on request.
> >
> >     Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.
> >
> >
> >
> > --
> > *Ravindra Kumar Meena*,
> > B. Tech. Computer Science and Engineering,
> > Indian Institute of Technology (Indian School of Mines)
> > <https://www.iitism.ac.in/>, Dhanbad
>
> --
> Sebastian Huber, embedded brains GmbH
>
> Address : Dornierstr. 4, D-82178 Puchheim, Germany
> Phone   : +49 89 189 47 41-16
> Fax     : +49 89 189 47 41-09
> E-Mail  : sebastian.huber at embedded-brains.de
> PGP     : Public key available on request.
>
> Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.
>
>

-- 
*Ravindra Kumar Meena*,
B. Tech. Computer Science and Engineering,
Indian Institute of Technology (Indian School of Mines)
<https://www.iitism.ac.in/>, Dhanbad
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