summaryrefslogtreecommitdiff
path: root/tools/perf/Documentation/perf-trace.txt
diff options
context:
space:
mode:
Diffstat (limited to 'tools/perf/Documentation/perf-trace.txt')
-rw-r--r--tools/perf/Documentation/perf-trace.txt31
1 files changed, 27 insertions, 4 deletions
diff --git a/tools/perf/Documentation/perf-trace.txt b/tools/perf/Documentation/perf-trace.txt
index daccd2c..7b0497f 100644
--- a/tools/perf/Documentation/perf-trace.txt
+++ b/tools/perf/Documentation/perf-trace.txt
@@ -9,6 +9,7 @@ SYNOPSIS
--------
[verse]
'perf trace'
+'perf trace record'
DESCRIPTION
-----------
@@ -16,9 +17,14 @@ This command will show the events associated with the target, initially
syscalls, but other system events like pagefaults, task lifetime events,
scheduling events, etc.
-Initially this is a live mode only tool, but eventually will work with
-perf.data files like the other tools, allowing a detached 'record' from
-analysis phases.
+This is a live mode tool in addition to working with perf.data files like
+the other perf tools. Files can be generated using the 'perf record' command
+but the session needs to include the raw_syscalls events (-e 'raw_syscalls:*').
+Alernatively, the 'perf trace record' can be used as a shortcut to
+automatically include the raw_syscalls events when writing events to a file.
+
+The following options apply to perf trace; options to perf trace record are
+found in the perf record man page.
OPTIONS
-------
@@ -59,7 +65,9 @@ OPTIONS
-m::
--mmap-pages=::
- Number of mmap data pages. Must be a power of two.
+ Number of mmap data pages (must be a power of two) or size
+ specification with appended unit character - B/K/M/G. The
+ size is rounded up to have nearest pages power of two value.
-C::
--cpu::
@@ -78,6 +86,21 @@ the thread executes on the designated CPUs. Default is to monitor all CPUs.
--input
Process events from a given perf data file.
+-T
+--time
+ Print full timestamp rather time relative to first sample.
+
+--comm::
+ Show process COMM right beside its ID, on by default, disable with --no-comm.
+
+--summary::
+ Show a summary of syscalls by thread with min, max, and average times (in
+ msec) and relative stddev.
+
+--tool_stats::
+ Show tool stats such as number of times fd->pathname was discovered thru
+ hooking the open syscall return + vfs_getname or via reading /proc/pid/fd, etc.
+
SEE ALSO
--------
linkperf:perf-record[1], linkperf:perf-script[1]