diff options
Diffstat (limited to 'Documentation/trace/ftrace.txt')
| -rw-r--r-- | Documentation/trace/ftrace.txt | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/Documentation/trace/ftrace.txt b/Documentation/trace/ftrace.txt index bfe8c29b1f1d..ea2d35d64d26 100644 --- a/Documentation/trace/ftrace.txt +++ b/Documentation/trace/ftrace.txt @@ -735,7 +735,7 @@ Here are the available options: function as well as the function being traced. print-parent: - bash-4000 [01] 1477.606694: simple_strtoul <-strict_strtoul + bash-4000 [01] 1477.606694: simple_strtoul <-kstrtoul noprint-parent: bash-4000 [01] 1477.606694: simple_strtoul @@ -759,7 +759,7 @@ Here are the available options: latency-format option is enabled. bash 4000 1 0 00000000 00010a95 [58127d26] 1720.415ms \ - (+0.000ms): simple_strtoul (strict_strtoul) + (+0.000ms): simple_strtoul (kstrtoul) raw - This will display raw numbers. This option is best for use with user applications that can translate the raw @@ -2430,6 +2430,19 @@ The following commands are supported: echo '!schedule:disable_event:sched:sched_switch' > \ set_ftrace_filter +- dump + When the function is hit, it will dump the contents of the ftrace + ring buffer to the console. This is useful if you need to debug + something, and want to dump the trace when a certain function + is hit. Perhaps its a function that is called before a tripple + fault happens and does not allow you to get a regular dump. + +- cpudump + When the function is hit, it will dump the contents of the ftrace + ring buffer for the current CPU to the console. Unlike the "dump" + command, it only prints out the contents of the ring buffer for the + CPU that executed the function that triggered the dump. + trace_pipe ---------- |