diff options
| -rw-r--r-- | docs/tracing.txt | 11 | ||||
| -rwxr-xr-x | scripts/tracetool | 9 | ||||
| -rw-r--r-- | trace-events | 3 |
3 files changed, 10 insertions, 13 deletions
diff --git a/docs/tracing.txt b/docs/tracing.txt index 85793cf173..d1d4e8cba2 100644 --- a/docs/tracing.txt +++ b/docs/tracing.txt @@ -12,11 +12,16 @@ for debugging, profiling, and observing execution. ./configure --trace-backend=simple make -2. Run the virtual machine to produce a trace file: +2. Create a file with the events you want to trace: - qemu ... # your normal QEMU invocation + echo bdrv_aio_readv > /tmp/events + echo bdrv_aio_writev >> /tmp/events -3. Pretty-print the binary trace file: +3. Run the virtual machine to produce a trace file: + + qemu -trace events=/tmp/events ... # your normal QEMU invocation + +4. Pretty-print the binary trace file: ./simpletrace.py trace-events trace-* diff --git a/scripts/tracetool b/scripts/tracetool index e2cf11784b..c740080ebb 100755 --- a/scripts/tracetool +++ b/scripts/tracetool @@ -221,15 +221,10 @@ EOF linetoc_simple() { - local name state + local name name=$(get_name "$1") - if has_property "$1" "disable"; then - state="0" - else - state="1" - fi cat <<EOF -{.tp_name = "$name", .state=$state}, +{.tp_name = "$name", .state=0}, EOF simple_event_num=$((simple_event_num + 1)) } diff --git a/trace-events b/trace-events index f08d6d0b41..eb612e83d1 100644 --- a/trace-events +++ b/trace-events @@ -17,9 +17,6 @@ # Example: qemu_malloc(size_t size) "size %zu" # # The "disable" keyword will build without the trace event. -# In case of 'simple' trace backend, it will allow the trace event to be -# compiled, but this would be turned off by default. It can be toggled on via -# the monitor. # # The <name> must be a valid as a C function name. # |