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-rw-r--r--tools/perf/Documentation/perf-probe.txt14
1 files changed, 14 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-probe.txt b/tools/perf/Documentation/perf-probe.txt
index 165c2b1d4317..d7e4869905f1 100644
--- a/tools/perf/Documentation/perf-probe.txt
+++ b/tools/perf/Documentation/perf-probe.txt
@@ -130,6 +130,11 @@ OPTIONS
--max-probes=NUM::
Set the maximum number of probe points for an event. Default is 128.
+--target-ns=PID:
+ Obtain mount namespace information from the target pid. This is
+ used when creating a uprobe for a process that resides in a
+ different mount namespace from the perf(1) utility.
+
-x::
--exec=PATH::
Specify path to the executable or shared library file for user
@@ -264,6 +269,15 @@ Add probes at malloc() function on libc
./perf probe -x /lib/libc.so.6 malloc or ./perf probe /lib/libc.so.6 malloc
+Add a uprobe to a target process running in a different mount namespace
+
+ ./perf probe --target-ns <target pid> -x /lib64/libc.so.6 malloc
+
+Add a USDT probe to a target process running in a different mount namespace
+
+ ./perf probe --target-ns <target pid> -x /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.121-0.b13.el7_3.x86_64/jre/lib/amd64/server/libjvm.so %sdt_hotspot:thread__sleep__end
+
+
SEE ALSO
--------
linkperf:perf-trace[1], linkperf:perf-record[1], linkperf:perf-buildid-cache[1]