From mboxrd@z Thu Jan 1 00:00:00 1970 From: jonathan.r.julien@gmail.com (Jonathan Rajotte) Date: Thu, 26 May 2016 14:02:57 -0400 Subject: [lttng-dev] scale numbers for LTTNG In-Reply-To: References: Message-ID: Hi Vijay, Could you share with us a test program or details on how you evaluated those limitation ? Thanks On Thu, May 26, 2016 at 8:23 AM, Vijay Anand wrote: > Could anyone please let us know how do we go about this ? > > Regards, > Vijay > > On Tue, May 24, 2016 at 11:31 AM, Vijay Anand > wrote: > >> Hello Folks, >> >> We have been evaluating LTTNG for use in our production systems for user >> space tracing. We have evaluated most of the features supported by LTTNG >> and very much see a value add LTTNG brings into our debugging >> infrastructure. >> >> - Our current requirement is to trace Userspace programs running on >> linux. >> - Each of the linux processes define their own tracepoint providers. >> - We would like to trace event histories of each process >> independently. >> - We could potentially have 1000s of such processes running >> simultaneously. >> - We concluded on using a session/channel to trace one tracepoint >> provider corresponding to a unique process. >> - But I understand we could also create one system wide session >> and use channels to trace each of the providers. Either of the approaches >> seems to work for us. >> - But upon evaluating I see that we could create only 25 active >> process-sessions and not traces from all the processes are logged. >> - Please note I have tried increasing the buffer size and the >> number of buffers. This doesn't help. >> - Each of the process trace 52 events at and interval of 1 second >> each. >> - I have evaluated this with lttng in session,live and snapshot modes >> and I have not been getting favourable. >> >> Could you folks share the scale numbers that LTTNG supports, especially >> when it comes to tracing user space programs ? >> >> Regards, >> Vijay >> ​​ >> > > > _______________________________________________ > lttng-dev mailing list > lttng-dev at lists.lttng.org > https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev > > -- Jonathan Rajotte Julien -------------- next part -------------- An HTML attachment was scrubbed... URL: