[ZZ]lttctl usage

wangch05

Please specify a trace name.
Please specify an operation.
Please use the following arguments :
-n name       Name of the trace.
-b            Create trace channels and start tracing (no daemon).
-c            Create trace channels.
-m mode       Normal, flight recorder or hybrid mode.
              Mode values : normal (default), flight or hybrid.
-r            Destroy trace channels.
-R            Stop tracing and destroy trace channels.
-s            Start tracing.
-q            Stop tracing.
-d            Create trace, spawn a lttd daemon, start tracing.
              (optionally, you can set LTT_DAEMON
              env. var.)
-f            Stop tracing, dump flight recorder trace, destroy channels
              (for hybrid traces)
-t            Trace root path. (ex. /root/traces/example_trace)
-T            Type of trace (ex. relay)
-l            LTT channels root path. (ex. /mnt/debugfs/ltt)
-Z            Size of the low data rate subbuffers (will be rounded to next page size)
-X            Number of low data rate subbuffers
-V            Size of the medium data rate subbuffers (will be rounded to next page size)
-B            Number of medium data rate subbuffers
-z            Size of the high data rate subbuffers (will be rounded to next page size)
-x            Number of high data rate subbuffers
-a            Append to trace
-N            Number of lttd threads

First execute after system boot:
# modprobe ltt-statedump
# modprobe ltt-control
# ltt-armall


本文来自ChinaUnix博客，如果查看原文请点：http://blog.chinaunix.net/u2/86775/showart_1732822.html