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Diffstat (limited to 'Documentation/trace/boottime-trace.rst')
| -rw-r--r-- | Documentation/trace/boottime-trace.rst | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/Documentation/trace/boottime-trace.rst b/Documentation/trace/boottime-trace.rst index 1d10fdebf1b2..dcb390075ca1 100644 --- a/Documentation/trace/boottime-trace.rst +++ b/Documentation/trace/boottime-trace.rst @@ -13,7 +13,7 @@ Boot-time tracing allows users to trace boot-time process including device initialization with full features of ftrace including per-event filter and actions, histograms, kprobe-events and synthetic-events, and trace instances. -Since kernel cmdline is not enough to control these complex features, +Since kernel command line is not enough to control these complex features, this uses bootconfig file to describe tracing feature programming. Options in the Boot Config @@ -21,7 +21,7 @@ Options in the Boot Config Here is the list of available options list for boot time tracing in boot config file [1]_. All options are under "ftrace." or "kernel." -refix. See kernel parameters for the options which starts +prefix. See kernel parameters for the options which starts with "kernel." prefix [2]_. .. [1] See :ref:`Documentation/admin-guide/bootconfig.rst <bootconfig>` @@ -50,7 +50,7 @@ kernel.fgraph_filters = FILTER[, FILTER2...] Add fgraph tracing function filters. kernel.fgraph_notraces = FILTER[, FILTER2...] - Add fgraph non tracing function filters. + Add fgraph non-tracing function filters. Ftrace Per-instance Options @@ -81,10 +81,10 @@ ftrace.[instance.INSTANCE.]tracer = TRACER Set TRACER to current tracer on boot. (e.g. function) ftrace.[instance.INSTANCE.]ftrace.filters - This will take an array of tracing function filter rules + This will take an array of tracing function filter rules. ftrace.[instance.INSTANCE.]ftrace.notraces - This will take an array of NON-tracing function filter rules + This will take an array of NON-tracing function filter rules. Ftrace Per-Event Options @@ -93,7 +93,7 @@ Ftrace Per-Event Options These options are setting per-event options. ftrace.[instance.INSTANCE.]event.GROUP.EVENT.enable - Enables GROUP:EVENT tracing. + Enable GROUP:EVENT tracing. ftrace.[instance.INSTANCE.]event.GROUP.EVENT.filter = FILTER Set FILTER rule to the GROUP:EVENT. @@ -145,10 +145,10 @@ below:: } } -Also, boottime tracing supports "instance" node, which allows us to run +Also, boot-time tracing supports "instance" node, which allows us to run several tracers for different purpose at once. For example, one tracer -is for tracing functions start with "user\_", and others tracing "kernel\_" -functions, you can write boot config as below:: +is for tracing functions starting with "user\_", and others tracing +"kernel\_" functions, you can write boot config as below:: ftrace.instance { foo { |