diff options
Diffstat (limited to 'tools/perf/Documentation/perf-probe.txt')
| -rw-r--r-- | tools/perf/Documentation/perf-probe.txt | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/tools/perf/Documentation/perf-probe.txt b/tools/perf/Documentation/perf-probe.txt index 7a258e953252..39e387042098 100644 --- a/tools/perf/Documentation/perf-probe.txt +++ b/tools/perf/Documentation/perf-probe.txt @@ -151,6 +151,8 @@ Probe points are defined by following syntax. 3) Define event based on source file with lazy pattern [[GROUP:]EVENT=]SRC;PTN [ARG ...] + 4) Pre-defined SDT events or cached event with name + %[PROVIDER:]SDTEVENT 'EVENT' specifies the name of new event, if omitted, it will be set the name of the probed function. You can also specify a group name by 'GROUP', if omitted, set 'probe' is used for kprobe and 'probe_<bin>' is used for uprobe. Note that using existing group name can conflict with other events. Especially, using the group name reserved for kernel modules can hide embedded events in the @@ -158,6 +160,11 @@ modules. 'FUNC' specifies a probed function name, and it may have one of the following options; '+OFFS' is the offset from function entry address in bytes, ':RLN' is the relative-line number from function entry line, and '%return' means that it probes function return. And ';PTN' means lazy matching pattern (see LAZY MATCHING). Note that ';PTN' must be the end of the probe point definition. In addition, '@SRC' specifies a source file which has that function. It is also possible to specify a probe point by the source line number or lazy matching by using 'SRC:ALN' or 'SRC;PTN' syntax, where 'SRC' is the source file path, ':ALN' is the line number and ';PTN' is the lazy matching pattern. 'ARG' specifies the arguments of this probe point, (see PROBE ARGUMENT). +'SDTEVENT' and 'PROVIDER' is the pre-defined event name which is defined by user SDT (Statically Defined Tracing) or the pre-cached probes with event name. +Note that before using the SDT event, the target binary (on which SDT events are defined) must be scanned by linkperf:perf-buildid-cache[1] to make SDT events as cached events. + +For details of the SDT, see below. +https://sourceware.org/gdb/onlinedocs/gdb/Static-Probe-Points.html PROBE ARGUMENT -------------- @@ -237,4 +244,4 @@ Add probes at malloc() function on libc SEE ALSO -------- -linkperf:perf-trace[1], linkperf:perf-record[1] +linkperf:perf-trace[1], linkperf:perf-record[1], linkperf:perf-buildid-cache[1] |