Reading debug/tracing info
From: Vladimir Murzin <hidden>
Date: 2011-08-21 05:22:55
On 8/20/11, esmaeil mirzaee [off-list ref] wrote:
Hi On Sat, Aug 20, 2011 at 12:10 PM, Prateek Sharma [off-list ref] wrote:quoted
On Sat, Aug 20, 2011 at 3:20 PM, Prateek Sharma [off-list ref] wrote:quoted
Hello all, I am learning how to add static trace points via trace_events. I am seeing the trace using 'cat /sys/kernel/debug/tracing/trace' .I am new and I try to learn trace. Can you give me how can use trace?quoted
quoted
Naturally the tracing buffer size is limited. My question is, what is the recommended way of reading trace data? Ive looked at perf record/report, but so far, i have only managed to get aggregated statistics, or complete dumps. What i need is just a way to collect all the trace output to one file. Basically i am using the trace events as a souped up printk (since i need to collect large amounts of traces). Do i need to use LTTng/viewer or something for this task? Thanks!I've already found the solution to this, turns out there is trace_pipe as well. Sorry! _______________________________________________ Kernelnewbies mailing list Kernelnewbies at kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies_______________________________________________ Kernelnewbies mailing list Kernelnewbies at kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Hi Esmaeil! Some good starting points for you: [1] Documentation/ftrace.txt [2] http://lwn.net/Articles/322666/ [3] http://lwn.net/Articles/365835/ [4] http://lwn.net/Articles/366796/ [5] http://lwn.net/Articles/370423/