GSoC Project | Basic Support for Trace Compass

[Sebastian Huber]

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.