From mboxrd@z Thu Jan 1 00:00:00 1970 From: vjanandr85@gmail.com (Vijay Anand) Date: Tue, 24 May 2016 11:31:02 +0530 Subject: [lttng-dev] scale numbers for LTTNG Message-ID: 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 ​​ -------------- next part -------------- An HTML attachment was scrubbed... URL: