Hi Genevieve, My target to is merge the traces of two different machines taken on different time or same time .
Actually synchronization was not working on different machine so I tried on same machine. But now I got it correctly I think so :) For different time we need to apply offset so that their beginning matches. I think I need to do this . I tried applying offset on eclipse luna ( I added linux tools in install new software) but I am not getting this option " Apply time offset ". I tried on tracecompass also, where I am getting time offset option but the synchronization view is empty . The window is not showing anything. The tracecompass version is 0.1.0 Is there any other plugin for synchronization ? On Tue, Jan 6, 2015 at 9:58 PM, Geneviève Bastien <[email protected]> wrote: > Hi Divya, > > I'm bringing this discussion back to lttng-dev, as it may benefit others > in the future. > > You now have the right fields to synchronize traces. It uses packets of > type TCP and fields seq, ack_seq and flags to match packets. > > But what are you trying to achieve exactly? The traces you sent me are > taken on the same machine at different times. They can never be > synchronized. Trace synchronization allows you to synchronize traces taken > at the same time on different machines (clocks) so that their events can > have the same reference clock. > > You can apply a time offset to one of the traces so that their beginning > matches (Right-click on the experiment -> Apply time offset... More > documentation on this feature is available in the master code). If that's > what you want. Otherwise, please explain your specific need. > > Geneviève > > > > On 01/06/2015 01:33 AM, Divya Vyas wrote: > > Hi, > > I am attaching the traces . I tried to synchronize the traces of same > machine but still quality is absent . > > I am in urgent need to get these traces synchronized . > > On Tue, Jan 6, 2015 at 11:00 AM, Divya Vyas <[email protected]> wrote: > >> Hi , >> >> I tried again the steps. >> >> net_dev_queue: { cpu_id = 0 }, { skbaddr = 18446612135892807424, len = >> 98, name = "eth0", network_header = ( _nhtype_ip : container = 1 ), >> network_fields = { nhtype_ip = { ihl_version = 0x45, tos = 0, tot_len = 84, >> id = 0x560A, frag_off = 16384, ttl = 64, protocol = 0x1, checksum = 0xFFF4, >> saddr = 0xAA267D8, daddr = 0xAA2678E } }, transport_header = ( _thtype_none >> : container = 0 ), transport_fields = { thtype_none = { } } } >> >> net_dev_queue: { cpu_id = 0 }, { skbaddr = 18446612135892807424, len = >> 98, name = "eth0", network_header = ( _nhtype_ip : container = 1 ), >> network_fields = { nhtype_ip = { ihl_version = 0x45, tos = 0, tot_len = 84, >> id = 0x560A, frag_off = 16384, ttl = 64, protocol = 0x1, checksum = 0xFFF4, >> saddr = 0xAA267D8, daddr = 0xAA2678E } }, transport_header = ( _thtype_none >> : container = 0 ), transport_fields = { thtype_none = { } } } >> >> >> Is this kind of data should be added in the trace log ? >> >> >> >> On Tue, Jan 6, 2015 at 3:21 AM, Divya Vyas <[email protected]> wrote: >> >>> Hi, >>> >>> Can you please help me what kind of extra fields will be added in trace >>> data. Because I think I followed all the steps. >>> >>> The branch I was not able to got ,getting some git error. So I >>> downloaded snapshot from website. >>> On Jan 5, 2015 9:14 PM, "Geneviève Bastien" <[email protected]> >>> wrote: >>> >>>> Hi Divya, >>>> >>>> I looked at your traces and you do not seem to be using the >>>> 'net_data_experimental' special branch to get the extra fields for >>>> synchronization. You have the net_dev_queue and netif_receive_skb events, >>>> but they do not have the required fields to be able to synchronize. See the >>>> section "Obtain synchronizable traces" in >>>> http://help.eclipse.org/luna/index.jsp?topic=%2Forg.eclipse.linuxtools.lttng.help%2Fdoc%2FTrace-synchronization.html >>>> for how to compile with that branch. >>>> >>>> Geneviève >>>> >>>> >>>> On 12/28/2014 12:44 AM, Divya Vyas wrote: >>>> >>>> Hi, >>>> >>>> I am getting Synchronization quality is absent. The workload I am >>>> using is ssh and scp . >>>> >>>> I have attached the traces . Can you please look at it and give em >>>> some advise where I am going wrong? >>>> >>>> Thanks, >>>> Divya >>>> >>>> On Wed, Dec 24, 2014 at 1:54 AM, Geneviève Bastien < >>>> [email protected]> wrote: >>>> >>>>> Hi Divya, >>>>> >>>>> If you followed the instructions in the help, then you have compiled >>>>> LTTng-modules with the right tracepoints enabled on all the machines >>>>> you >>>>> want to synchronize. Which method did you choose? >>>>> >>>>> Make sure you enabled either net_dev_queue/netif_receive_skb or >>>>> inet_sock_local_in/inet_sock_local_out on all machines. Also make sure >>>>> all machines exchange TCP packets during the trace, otherwise there >>>>> will >>>>> be nothing to synchronize them on. >>>>> >>>>> When you say you are not getting anything, what do you mean? Do you >>>>> have >>>>> output in the Synchronization view? If the synchronization was OK, but >>>>> nothing was found, you should get a Synchronization Quality of >>>>> "Absent". >>>>> If the output is empty, either you have long traces and you didn't get >>>>> anything yet (there is no progress bar for the synchronization yet). Or >>>>> you may have gotten an exception. >>>>> >>>>> Can you provide us with your traces so we can take a closer look? >>>>> >>>>> Geneviève >>>>> >>>>> >>>>> On 14-12-23 02:40 PM, Matthew Khouzam wrote: >>>>> > So you have traces with network stuff, I would suggest seeing what >>>>> > events are enabled in your trace. Maybe you are missing some key >>>>> events, >>>>> > maybe the synchronization worked and we're chasing a ghost... >>>>> > >>>>> > I am ccing Genevieve Bastien, and Masoume Jabbarifar, the two people >>>>> who >>>>> > designed and implemented synchronisation. >>>>> > >>>>> > I am not as much an expert as I would like to be in that field. >>>>> > >>>>> > For offsetting though, it's in tracecompass, the next version of the >>>>> > Eclipse LTTng viewer >>>>> > >>>>> > Here is a link to the page. >>>>> > http://projects.eclipse.org/projects/tools.tracecompass >>>>> > >>>>> > On 14-12-23 12:19 AM, Divya Vyas wrote: >>>>> >> Hi, >>>>> >> >>>>> >> Is there any document which describes how to synchronize the traces >>>>> on >>>>> >> same machine as well as different machine ( setting offset also ) . >>>>> >> >>>>> >> I exported the two trace in experiment and clicked on synchronize >>>>> >> traces . But not getting anything. >>>>> >> >>>>> >> I followed this page >>>>> >> >>>>> >> >>>>> http://help.eclipse.org/luna/index.jsp?topic=%2Forg.eclipse.linuxtools.lttng.help%2Fdoc%2FTrace-synchronization.html >>>>> >> >>>>> >> Thanks, >>>>> >> Divya >>>>> >> >>>>> >> >>>>> >> >>>>> >> On Mon, Dec 22, 2014 at 11:24 PM, Matthew Khouzam >>>>> >> <[email protected] <mailto:[email protected] >>>>> >> >>>>> >> wrote: >>>>> >> >>>>> >> Sorry, I was a little hasty in my reply. You can export traces, >>>>> >> but not >>>>> >> experiments yet, this is a feature to expect soon if people >>>>> want it. >>>>> >> >>>>> >> >>>>> >> On 14-12-22 10:17 AM, Matthew Khouzam wrote: >>>>> >> > Michel has hit the nail on the head there. >>>>> >> > >>>>> >> > I would just like to add that one can export an experiment in >>>>> trace >>>>> >> > compass. This means that the two traces are shipped in a zip >>>>> >> with the >>>>> >> > synchronization. You can also apply a constant clock offset if >>>>> >> network >>>>> >> > events are unavailable. If you really really want to make a >>>>> CTF >>>>> >> trace as >>>>> >> > an output, perhaps look at the python bound babeltrace? >>>>> >> > >>>>> >> > BR >>>>> >> > >>>>> >> > Matthew >>>>> >> > >>>>> >> > >>>>> >> > On 14-12-22 08:07 AM, Michel Dagenais wrote: >>>>> >> >> Normally, the two traces are stored separately and they are >>>>> >> "merged" >>>>> >> >> at display time in TraceCompass. If they were taken on the >>>>> same >>>>> >> host, >>>>> >> >> they use the same clock and should be naturally aligned. If >>>>> >> they come >>>>> >> >> from different hosts and you want very fine symchronization, >>>>> >> you need >>>>> >> >> some communication events from which to synchronize the >>>>> traces. TCP >>>>> >> >> packet send and receive events are typically used. If you >>>>> want >>>>> >> to look >>>>> >> >> at two traces simultaneously, it normally implies that the >>>>> two are >>>>> >> >> related, the two nodes communicating through the network. >>>>> >> >> >>>>> >> >> >>>>> >> >>>>> ------------------------------------------------------------------------ >>>>> >> >> >>>>> >> >> Hi, >>>>> >> >> >>>>> >> >> Is there any way to merge the two CTF traces and see them >>>>> >> in one >>>>> >> >> with trace synchronization ? >>>>> >> >> >>>>> >> >> How it is related to trace synchronization using network >>>>> >> events ? >>>>> >> >> >>>>> >> >> >>>>> >> >> Thanks, >>>>> >> >> Divya >>>>> >> >> >>>>> >> >> _______________________________________________ >>>>> >> >> lttng-dev mailing list >>>>> >> >> [email protected] <mailto: >>>>> [email protected]> >>>>> >> >> >>>>> http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev >>>>> >> >> >>>>> >> >> >>>>> >> >> >>>>> >> >> >>>>> >> >> _______________________________________________ >>>>> >> >> lttng-dev mailing list >>>>> >> >> [email protected] <mailto:[email protected]> >>>>> >> >> http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev >>>>> >> > >>>>> >> > _______________________________________________ >>>>> >> > lttng-dev mailing list >>>>> >> > [email protected] <mailto:[email protected]> >>>>> >> > http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev >>>>> >> >>>>> >> >>>>> >> _______________________________________________ >>>>> >> lttng-dev mailing list >>>>> >> [email protected] <mailto:[email protected]> >>>>> >> http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev >>>>> >> >>>>> >> >>>>> >>>>> >>>>> >>>> >>>> >> > >
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