* Diego Dompe ([email protected]) wrote: > Hi Mathieu, > > Thanks for the help. Here is my list of details: > > - Clocks: the spec doesn't explain properly that timestamps are an offset > from the base time of the clock they refer to. Since I was using 64bit > timestamps I somehow assumed that I was using absolute timestamps from the > epoch (although the spec doesn't says it either).
Not sure if it was there when you wrote your comment, but the CTF spec currently has: "The "offset_s" and "offset" fields indicate the offset from POSIX.1 Epoch, 1970-01-01 00:00:00 +0000 (UTC), to the zero of value of the clock." > - I saw that the lttng-generated traces for metadata are always a multiple > of 4k in size (at least the ones I generate for either kernel or user > space). I can't find where in the spec it mentions requirements regarding > metadata packet padding. I was generating metadata packets that ended up > right after my TSDL and eclipse wasn't happy about it (although I didn't > try babeltrace). Also I found that the lttng-generated traces have a > "empty" metadata packet after the metadata containing the TSDL, I didn't > find either any documentation regarding this. Babeltrace had a limitation on not accepting packets smaller than 4kB (page size actually), but it is now fixed. Thanks, Mathieu > > Regards, > > Diego > > On Thu, Jul 5, 2012 at 8:20 AM, Mathieu Desnoyers < > [email protected]> wrote: > > > * Diego Dompe ([email protected]) wrote: > > > Hi, > > > > > > I'm developing a custom tracer for an embedded product that will generate > > > CTF format. I was able to generate generic traces that can be interpreted > > > properly with babeltrace (but not with eclipse, I already file a bug for > > > that), but I found the CTF specification lacking in some aspects (I had > > to > > > peek into lttng-generated CTF traces to figure out some details). I was > > > wondering what is the proper mailing list to clear my questions and > > provide > > > feedback on the CTF specification for improvement in the areas where the > > > documentation is not detailed yet. I don't see any CTF-specific mailing > > > list, it's OK to discuss it here? Or maybe directly with a developer(s)? > > > > Hi Diego, > > > > Yes, this mailing list would be the proper place, along maybe with > > adding the MCA tiwg mailing list in CC, which I'm doing here. > > > > Thanks, > > > > Mathieu > > > > -- > > Mathieu Desnoyers > > Operating System Efficiency R&D Consultant > > EfficiOS Inc. > > http://www.efficios.com > > -- Mathieu Desnoyers EfficiOS Inc. http://www.efficios.com _______________________________________________ lttng-dev mailing list [email protected] http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
