linux-zen-server/tools/testing/selftests/ftrace/test.d/00basic/snapshot.tc

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2023-08-30 17:53:23 +02:00
#!/bin/sh
# description: Snapshot and tracing setting
# requires: snapshot
# flags: instance
echo "Set tracing off"
echo 0 > tracing_on
echo "Allocate and take a snapshot"
echo 1 > snapshot
# Since trace buffer is empty, snapshot is also empty, but allocated
grep -q "Snapshot is allocated" snapshot
echo "Ensure keep tracing off"
test `cat tracing_on` -eq 0
echo "Set tracing on"
echo 1 > tracing_on
echo "Take a snapshot again"
echo 1 > snapshot
echo "Ensure keep tracing on"
test `cat tracing_on` -eq 1
exit 0