tools/testing/selftests/ftrace/test.d/00basic/snapshot.tc

   1 #!/bin/sh
   2 # description: Snapshot and tracing setting
   3 # requires: snapshot
   4 # flags: instance
   5
   6 echo "Set tracing off"
   7 echo 0 > tracing_on
   8
   9 echo "Allocate and take a snapshot"
  10 echo 1 > snapshot
  11
  12 # Since trace buffer is empty, snapshot is also empty, but allocated
  13 grep -q "Snapshot is allocated" snapshot
  14
  15 echo "Ensure keep tracing off"
  16 test `cat tracing_on` -eq 0
  17
  18 echo "Set tracing on"
  19 echo 1 > tracing_on
  20
  21 echo "Take a snapshot again"
  22 echo 1 > snapshot
  23
  24 echo "Ensure keep tracing on"
  25 test `cat tracing_on` -eq 1
  26
  27 exit 0