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+# OProfile
+
+```markdown
+operf -g -p <pid>
+  -g ...... caputre call-graph information
+
+opreport [opt] FILE
+     ...... show time spent per binary image
+  -l ...... show time spent per symbol
+  -c ...... show callgraph information (see below)
+  -a ...... add column with time spent accumulated over child nodes
+
+ophelp
+     ...... show supported hw/sw events
+```