[PATCH 0/1] Introduce an instrumented profiler using BpfTrace

[Aaron Lewis]

I am proposing this patch as a simple way of turning BpfTrace into an
instrumented profiler. This approach has come in handy for me more than
once, so I felt like it could be useful for others as well.

I am not entirely sure where something like this should live in the
kernel tree, so I took a chance and put it in
"tools/bpftrace/instrumented_profiler". I am not attached to this
location, so please feel free to recommend a better place for it to live
if this doesn't seem appropriate.

I have included two samples as examples of how a trace can be set up
(`kvm_trace.bt` and `vfio_trace.bt`). The included Python script then
runs over the output of these traces to generate the final profiler
results.  Example output can be seen in the patch itself.

Aaron Lewis (1):
  tools/bpftrace: Add a simple instrumented kernel profiler

 .../aggregate_bpf_results.py                  | 318 ++++++++++++++++++
 .../samples/kvm_trace.bt                      | 197 +++++++++++
 .../samples/vfio_trace.bt                     | 315 +++++++++++++++++
 3 files changed, 830 insertions(+)
 create mode 100644 tools/bpftrace/instrumented_profiler/aggregate_bpf_results.py
 create mode 100644 tools/bpftrace/instrumented_profiler/samples/kvm_trace.bt
 create mode 100644 tools/bpftrace/instrumented_profiler/samples/vfio_trace.bt

-- 
2.55.0.rc0.799.gd6f94ed593-goog