AI/rocm-systems
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Cód Saincheisteanna Iarratais Tarraingthe Gníomhartha Pacáistí Tionscadail Scaoileann Vicí Gníomhaíocht
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82cbe3f30674e35d22db598fefe74f2482f0940e
rocm-systems/source/docs/python.md
T
Jonathan R. Madsen 9618ddefba Causal profiling (#229) 
* Addition of basic structure

* Reworked categories

* More causal integration additions

* Causal implementation

* Update examples

* delete virtual_speedup files

* Update perfetto submodule to v31.0

* Update dyninst submodule

* Update timemory submodule

* ElfUtils build for libdw

* OMNITRACE_LIKELY and OMNITRACE_UNLIKELY

* Update common lib join

* Examples updates for causal profiling

* config updates with causal options

- OMNITRACE_CAUSAL_FIXED_LINE
- OMNITRACE_CAUSAL_FIXED_SPEEDUP
- OMNITRACE_CAUSAL_FILE
- OMNITRACE_CAUSAL_BINARY_SCOPE
- OMNITRACE_CAUSAL_SOURCE_SCOPE
- version info in banner
- support increments in parse_numeric_range
- fix occasional deadlock in first call to get_config

* PTL general task group

* Always include PID in debug/verbose messages

* Add blocking/unblocking gotchas to runtime init bundle

* CausalState

* thread_data updates

- generic component_bundle_cache

* Improve handling of causal in category_region

* components updates

- backtrace_causal component
- backtrace::get_data member func
- decrease ignore_depth in backtrace::sample(int)
- handle "omnitrace_main" in backtrace::filter_and_patch(...)
- tweak internal thread state scope for pthread_mutex_gotcha wrappers

* simplify tracing get_instrumentation_bundles usage

* sampling updates

- include backtrace_causal component
- disable backtrace_metrics if using causal and not using perfetto
- disable backtrace and backtrace_timestamp when using causal
- post_process_causal

* causal updates

- more checks in blocking_gotcha and unblocking_gotcha start/stop
- miscellaneous overhaul of data
- experiment update

* Remove virtual speedup

* libomnitrace code_object

* causal-profiling test

* libomnitrace library.cpp updates

- handle causal profiling
- fini_bundle

* Disable causal profiling by default

* Updated causal code and example

- example: three execution variants: cpu + rng, cpu, rng
- example: three instrumentation variants: none, omni, coz
- fix blocking gotcha credit
- rework perform_experiment_impl
- get_eligible_address_ranges
- compute_eligible_lines
- support fixed lines/speedups/functions
- update selected_entry to support function mode
- fix causal::delay
- experiment updates

* omnitrace_progress / omnitrace_user_progress

- with accompanying omnitrace_annotated_progress / omnitrace_user_annotated_progress

* Update timemory submodule

* CausalMode

- mode indicated whether causal predictions source be at line-level or function-level

* code_object, config, runtime, sampling, thread_data

- code_object: address_range
- code_object: basic::line_info serialize(), name(), hash()
- config updates
- two signals for causal sampling
- thread_data init fixes

* pthread updates

- pthread_create_gotcha processes delays
- pthread_mutex_gotcha does not wrap pthread_join in causal mode

* backtrace_causal update

- dynamic delay period stats

* main wrapper uses basename of argv[0]

* update elfio submodule

* perf support (currently unused)

* Fix experiment JSON serialization

- static_vector.hpp (unused)

* causal executable + config options updates

- omnitrace-causal exe simplifies running multiple causal configs
- changed the causal config option names

* Support both throughput and latency points

* process-causal-json.py script

- will be used later for testing

* stable_vector

* Rework thread_data

* Improve omnitrace-causal exe

- better verbosity handling
- correct diagnosis of status for child process
- execvpe when only one iteration (debugging)

* Update timemory submodule

* exe --version

- omnitrace, omnitrace-avail, and omnitrace-sample all support --version on command-line

* OMNITRACE_INTERNAL_API + OMNITRACE_{LIKELY,UNLIKELY}

* omnitrace-causal cmake format

* omnitrace config update

- OMNITRACE_CAUSAL_FILE_CLOBBER

* custom exception

- wraps STL exception and gets stacktrace during construction

* exit_gotcha supports _Exit

* use global construct_on_init + max threads

- add some safety when exceeding max # of threads

* update code_object binary filter

- exclude dyninst and tbbmalloc library

* containers: c_array, static_vector, stable_vector

- moved utility::c_array to container::c_array
- created static_vector: std::vector bound to std::array
- created stable_vector: vector with stable references

* grow thread_data when new thread created

* causal updates

- data: improve compute_eligible_lines to ignore lambdas
- data: use new thread_data
- delay: use new thread_data
- experiment: properly support latency points
- experiment: support file clobber
- experiment: ensure non-zero experiment time
- progress_point: use new thread_data
- backtrace_causal: use new thread_data

* Update causal-profiling tests

* fix omnitrace-causal backslash escaping

* process-causal-json script

* restructure causal implementation

- update verbose messages for omnitrace-causal diagnose_status
- migrated causal implementation in sampling.cpp to causal/sampling.cpp
- OMNITRACE_USE_CAUSAL does not require OMNITRACE_USE_SAMPLING
- added Mode::Causal
- causal sampling uses same signals as regular sampling
- moved tracing::thread_init to implementation file
- combined tracing::thread_init and tracing::thread_init_sampling
- added causal/components folder
- pthread_create_gotcha::wrapper_config
- omnitrace_preload checks OMNITRACE_USE_CAUSAL
  - updates mode accordingly

* update timemory submodule

* update timemory submodule

* causal example updates

- causal for lulesh

* perf code + utility - helpers

- relocated causal perf code
- placement new when generating unique ptr trait for potentially allocating during sampling
- additions to utility header
- removed previously added helpers.hpp

* update timemory submodule

* Default env variables for omnitrace-causal

- activate OMNITRACE_USE_KOKKOSP, etc.

* update stable_vector and static_vector

- static vector can use atomic for size tracking for thread-safe situations

* update causal example header

- CAUSAL_PROGRESS_NAMED
- use CAUSAL_ prefix for some macros

* Tweak lulesh example

- use CAUSAL_PROGRESS instead of CAUSAL_BEGIN and CAUSAL_END

* omnitrace-sample support for causal mode

- set OMNITRACE_USE_SAMPLING to off when OMNITRACE_MODE=causal

* refactor and cleanup code_object

- scope filter
- fixes to address_range

* overhaul causal data + causal config options

- full support for function and line mode
- support static vector of instruction pointers
- improve line info mapping resolution
- remove thread-locality from miscellanous functions where unnecessary
- causal options for {binary,source,function,fileline} exclusion

* causal experiment, sampling, and backtrace updates

- is_selected + unwind address array
- experiment warning about progress points
- increased buffer size for backtrace_casual sampler
- backtrace_causal only stores IP addresses instead of full unwind info

* category_region updates

- minor refactor
- local_category_region::mark

* Update causal tests

* Bump version to 1.8.0

* omnitrace-causal args + CLOBBER -> RESET

- renamed OMNITRACE_CAUSAL_FILE_CLOBBER to OMNITRACE_CAUSAL_FILE_RESET
- updated omnitrace-causal exe to support recently added configuration options
- other miscellaneous tweaks to data.cpp, experiment.cpp, and sampling.cpp

* Refactor causal and code_object

- code_object.hpp and code_object.cpp moved into binary folder
- causal components namespaced into omnitrace::causal::component
- moved sample_data out of backtrace_causal and into own file
- renamed backtrace_causal to causal::component::backtrace

* preload omnitrace_init + OMNITRACE_DEBUG_MARK

- env OMNITRACE_DEBUG_MARK
- fix omnitrace_init call when LD_PRELOAD-ing omnitrace

* Fix fileline support + line-info output names + experiment log

- line-info log files are prefixed with experiment name
- don't print experiment duration when E2E
- account for fileline scope in analysis

* KokkosP: OMNITRACE_KOKKOSP_NAME_LENGTH_MAX

- config option to limit the name of kokkos tool callbacks
- remove [kokkos] from KokkosP names

* Update causal example

- minor tweaks to decrease probability of overlapping regions in binary

* omnitrace-causal update

- prefix N / Ntot in environment printout

* Miscellaneous updates

- causal::finish_experimenting()
- OMNITRACE_CAUSAL_RANDOM_SEED
- KokkosP causal updates
  - exclude some callbacks, make some callbacks unique, etc.
- address_range::operator+=(address_range)
- combine contiguous ranges in binary/analysis.cpp when file, func, line is same and address range is contiguous
- bfd_line_info reads inline info
- wait for perform_experiment_impl to complete
- causal::delay updates
  - delay::process checks if experiment is active
  - uses threading::get_id()
- experiment scales duration up for larger speedup experiments
- line info samples includes excluded lines
- sampler uses CLOCK_REALTIME
- blocking_gotcha updates
  - is no longer fully static
  - adds audit routine which sets the postblock value to zero if try/timed routine fails
- category::host was added to causal_throughput_categories_t
- pthread_create_gotcha sets new threads local parent delay
  - was using internal value, now uses sequent value

* Causal improvements to KokkosP

* Updates to experiment time scaling

- use stats instead of just max

* binary/link_map.{hpp,cpp}

* update process-causal-json.py

* Folded fileline scope into source scope

* Update documentation

- Add documentation for causal profiling
- Replace 'Omnitrace' with 'OmniTrace' everywhere

* Update causal-helpers.cmake + omnitrace-testing.cmake

- split tests/CMakeLists.txt partially into omnitrace-testing.cmake

* omnitrace/causal.h

- OMNITRACE_CAUSAL_PROGRESS
- OMNITRACE_CAUSAL_PROGRESS_NAMED
- OMNITRACE_CAUSAL_BEGIN
- OMNITRACE_CAUSAL_END

* selected_entry + remove default filters for lambdas and operator()

- selected entry stores range and binary load address

* update process-causal-json.py

* format examples/lulesh/CMakeLists.txt

* causal-helpers find_package(Threads)

* OMNITRACE_KOKKOSP_KERNEL_LOGGER

- was OMNITRACE_KOKKOS_KERNEL_LOGGER

* quiet find of coz-profiler

* Fix rocm_smi exception handling

* Update timemory submodule (binutils)

- fix binutls compile error on some systems
- bump binutils to v2.40

* Fix miscellaneous tests

* OMNITRACE_KOKKOSP_PREFIX

* revert rocm_smi handling

* ElfUtils updates

- default to download version 0.188
- add -Wno-error=null-dereference due to GCC 12 compiler error

* Update causal example

* Remove OMNITRACE_VERBOSE from global workflow envs

* Reliable causal test

* disable compilation of causal perf files

* Remove set_current_selection with unwind stack

* update timemory submodule

* fix for segfault on bionic

- locking in TLS dtor was causing segfault

* remove experiment::is_selected(unwind_stack_t)

* update default init of selected_entry

* Fix for when IP is not offset by load address

* Update CMakeLists.txt

* Miscellaneous updates

- OMNITRACE_WARNING_OR_CI_THROW
- OMNITRACE_REQUIRE
- OMNITRACE_PREFER
- fixed issues with no ASLR
-  added load address variable and ipaddr() func to basic/bfd line info
- removed get_basic() from dwarf_line_info
- TIMEMORY_PREFER -> OMNITRACE_PREFER
- removed previously added binary_address and range variables from selected_entry

* Removed superfluous CausalState

* Additional causal tests (lulesh + kokkos)

* filter, prefer, analysis ASLR handling

- removed default filter on cold functions
- fixed OMNITRACE_PREFER
- fixed analysis ASLR handling

* Tweak line-info output

* Removed some superfluous code

- causal/delay
- causal/selected_entry

* Exclude main.cold in function mode

* Update validate-perfetto-proto.py

- account for occasional http errors

* Add sampling test disabling tmp files

* argparser for process-causal-json

- support validation
- support filtering

* Avoid pthread_{lock,unlock} in sampling offload

- use homemade atomic_mutex/atomic_lock since contention will be low and using pthread tools might trigger our wrappers

* Rename process-causal-json.py

- validate-causal-json.py

* rework omnitrace_add_causal_test

- capable of performing validation
- added validation tests

* Fix kokkosp_begin_deep_copy + causal

* Tweak address range in bfd_line_info::read_pc

* Tweak analysis and data IP handling

- look for gaps

* Disable scaling experiment time by speedup

* Revert change in max threads during CI

* binary updates

- significant overhaul of binary analysis implementation
- removed "basic_line_info" and "bfd_line_info" in lieu of "symbol" class
  - symbol class has basic BFD info + vector of inlines + vector of dwarf info

* Updated causal to use new binary analysis

- Fix symbol.cpp includes

* Updated formatting target

- include *.cmake files

* Updated causal tests

- causal tests should be stable now

* Update timemory and dyninst submodules

- TPLs are stripped + built w/o debug info

* Increase tolerance for causal validation speedups

- higher speedups have more variance (increased to +/- 5 from 3)

* Support causal output for MPI

- i.e. tag with MPI rank

* omnitrace-causal launcher argument

* improve experiment sampling output

* causal data updates

- call compute lines once
- fixed filtered cached binary info
- debugging info when experiment fails to start

* Tweaked causal validation tests

* dwarf_entry ranges

* CI updates

- increase max threads to 64

* Tweak causal E2E validation tests

- more threads
- shorter thread runtime
- more iterations

* Fix shadowed variable

* fix symbol read_bfd last PC calculation

* fix maybe-uninitialized warning

* omnitrace-causal launcher update

- only inject "omnitrace-causal --" once
- throw error if no matches found

* Update causal profiling docs for launcher

* fix address range boundaries
2023-01-24 18:53:23 -06:00

298 línte
14 KiB
Markdown
Amh An milleán Stair

# Python Support
```eval_rst
.. toctree::
:glob:
:maxdepth: 3
```
[OmniTrace](https://github.com/AMDResearch/omnitrace) supports profiling Python code at the source-level and/or the script-level.
Python support is enabled via the `OMNITRACE_USE_PYTHON` and the `OMNITRACE_PYTHON_VERSIONS="<MAJOR>.<MINOR>` CMake options.
Alternatively, to build multiple python versions, use `OMNITRACE_PYTHON_VERSIONS="<MAJOR>.<MINOR>;[<MAJOR>.<MINOR>]"`,
and `OMNITRACE_PYTHON_ROOT_DIRS="/path/to/version;[/path/to/version]"` instead of `OMNITRACE_PYTHON_VERSION`.
When building multiple Python versions, the length of the `OMNITRACE_PYTHON_VERSIONS` and `OMNITRACE_PYTHON_ROOT_DIRS` lists must
be the same size.
> ***When using omnitrace for Python, the Python interpreter major and minor version (e.g. 3.7) must match the interpreter major and minor version***
> ***used when compiling the Python bindings, i.e. when building omnitrace, a `libpyomnitrace.<IMPL>-<VERSION>-<ARCH>-<OS>-<ABI>.so` will be generated***
> ***where `IMPL` is the Python implementation, `VERSION` is the major and minor version, `ARCH` is the architecture,***
> ***`OS` is the operating system, and `ABI` is the application binary interface; Example: `libpyomnitrace.cpython-38-x86_64-linux-gnu.so`.***
## Getting Started
The omnitrace Python package is installed in `lib/pythonX.Y/site-packages/omnitrace`. In order to ensure the Python interpreter can find the omnitrace package,
add this path to the `PYTHONPATH` environment variable, e.g.:
```bash
export PYTHONPATH=/opt/omnitrace/lib/python3.8/site-packages:${PYTHONPATH}
```
If using either the `share/omnitrace/setup-env.sh` script or the modulefile in `share/modulefiles/omnitrace`, prefixing the `PYTHONPATH`
environment variable is automatically handled.
## Running OmniTrace on a Python Script
OmniTrace provides an `omnitrace-python` helper bash script which effectively handles ensuring `PYTHONPATH` is properly set and the correct python interpreter is used.
Thus the following are effectively equivalent:
```bash
omnitrace-python --help
export PYTHONPATH=/opt/omnitrace/lib/python3.8/site-packages:${PYTHONPATH}
python3.8 -m omnitrace --help
```
> ***`omnitrace-python` / `python -m omnitrace` uses the same command-line syntax as the `omnitrace` executable (i.e. `omnitrace-python <OMNITRACE_ARGS> -- <SCRIPT> <SCRIPT_ARGS>`) and has similar options.***
### Command Line Options
Use `omnitrace-python --help` to view the available options:
```console
usage: omnitrace [-h] [-v VERBOSITY] [-b] [-c FILE] [-s FILE] [-F [BOOL]] [--label [{args,file,line} [{args,file,line} ...]]] [-I FUNC [FUNC ...]] [-E FUNC [FUNC ...]] [-R FUNC [FUNC ...]] [-MI FILE [FILE ...]] [-ME FILE [FILE ...]] [-MR FILE [FILE ...]] [--trace-c [BOOL]]
optional arguments:
-h, --help show this help message and exit
-v VERBOSITY, --verbosity VERBOSITY
Logging verbosity
-b, --builtin Put 'profile' in the builtins. Use '@profile' to decorate a single function, or 'with profile:' to profile a single section of code.
-c FILE, --config FILE
OmniTrace configuration file
-s FILE, --setup FILE
Code to execute before the code to profile
-F [BOOL], --full-filepath [BOOL]
Encode the full function filename (instead of basename)
--label [{args,file,line} [{args,file,line} ...]]
Encode the function arguments, filename, and/or line number into the profiling function label
-I FUNC [FUNC ...], --function-include FUNC [FUNC ...]
Include any entries with these function names
-E FUNC [FUNC ...], --function-exclude FUNC [FUNC ...]
Filter out any entries with these function names
-R FUNC [FUNC ...], --function-restrict FUNC [FUNC ...]
Select only entries with these function names
-MI FILE [FILE ...], --module-include FILE [FILE ...]
Include any entries from these files
-ME FILE [FILE ...], --module-exclude FILE [FILE ...]
Filter out any entries from these files
-MR FILE [FILE ...], --module-restrict FILE [FILE ...]
Select only entries from these files
--trace-c [BOOL] Enable profiling C functions
usage: python3 -m omnitrace <OMNITRACE_ARGS> -- <SCRIPT> <SCRIPT_ARGS>
```
> ***The `--trace-c` option does not incorporate omnitrace's dynamic instrumentation support, rather it just enables profiling the underlying C function call within the Python interpreter.***
### Selective Instrumentation
Similar to the `omnitrace` executable, command-line options exist for restricting, including, and excluded the desired functions and modules, e.g. `--function-exclude "^__init__$"`.
Alternatively, adding `@profile` decorator to the primary function of interest in combination with the `-b` / `--builtin` option will narrow the scope of the
instrumentation to these function(s) and their children.
Consider the following Python code (`example.py`):
```python
import sys
def fib(n):
return n if n < 2 else (fib(n - 1) + fib(n - 2))
def inefficient(n):
a = 0
for i in range(n):
a += i
for j in range(n):
a += j
return a
def run(n):
return fib(n) + inefficient(n)
if __name__ == "__main__":
run(20)
```
Using `omnitrace-python ./example.py` with `OMNITRACE_USE_TIMEMORY=ON` and `OMNITRACE_TIMEMORY_COMPONENTS=trip_count` would produce:
```console
|-------------------------------------------------------------------------------------------|
| COUNTS NUMBER OF INVOCATIONS |
|-------------------------------------------------------------------------------------------|
| LABEL | COUNT | DEPTH | METRIC | SUM |
|---------------------------------------------------|--------|--------|------------|--------|
| |0>>> run | 1 | 0 | trip_count | 1 |
| |0>>> |_fib | 1 | 1 | trip_count | 1 |
| |0>>> |_fib | 2 | 2 | trip_count | 2 |
| |0>>> |_fib | 4 | 3 | trip_count | 4 |
| |0>>> |_fib | 8 | 4 | trip_count | 8 |
| |0>>> |_fib | 16 | 5 | trip_count | 16 |
| |0>>> |_fib | 32 | 6 | trip_count | 32 |
| |0>>> |_fib | 64 | 7 | trip_count | 64 |
| |0>>> |_fib | 128 | 8 | trip_count | 128 |
| |0>>> |_fib | 256 | 9 | trip_count | 256 |
| |0>>> |_fib | 512 | 10 | trip_count | 512 |
| |0>>> |_fib | 1024 | 11 | trip_count | 1024 |
| |0>>> |_fib | 2026 | 12 | trip_count | 2026 |
| |0>>> |_fib | 3632 | 13 | trip_count | 3632 |
| |0>>> |_fib | 5020 | 14 | trip_count | 5020 |
| |0>>> |_fib | 4760 | 15 | trip_count | 4760 |
| |0>>> |_fib | 2942 | 16 | trip_count | 2942 |
| |0>>> |_fib | 1152 | 17 | trip_count | 1152 |
| |0>>> |_fib | 274 | 18 | trip_count | 274 |
| |0>>> |_fib | 36 | 19 | trip_count | 36 |
| |0>>> |_fib | 2 | 20 | trip_count | 2 |
| |0>>> |_inefficient | 1 | 1 | trip_count | 1 |
|-------------------------------------------------------------------------------------------|
```
If the `inefficient` function were decorated with `@profile`:
```python
@profile
def inefficient(n):
# ...
```
And executed with `omnitrace-python -b -- ./example.py`, omnitrace would produce:
```console
|-----------------------------------------------------------|
| COUNTS NUMBER OF INVOCATIONS |
|-----------------------------------------------------------|
| LABEL | COUNT | DEPTH | METRIC | SUM |
|-------------------|--------|--------|------------|--------|
| |0>>> inefficient | 1 | 0 | trip_count | 1 |
|-----------------------------------------------------------|
```
## OmniTrace Python Source Instrumentation
Starting from the unmodified `example.py` script above, we start by importing the `omnitrace` module:
```python
import sys
import omnitrace # import omnitrace
def fib(n):
# ... etc. ...
```
Then, we can add `@omnitrace.profile()` to the `run` function:
```python
@omnitrace.profile()
def run(n):
# ...
```
Or we can use `omnitrace.profile()` as a context-manager around `run(20)`:
```python
if __name__ == "__main__":
with omnitrace.profile():
run(20)
```
The results for both of the source-level instrumentation modes are identical to the original `omnitrace-python ./example.py` results:
```console
|-------------------------------------------------------------------------------------------|
| COUNTS NUMBER OF INVOCATIONS |
|-------------------------------------------------------------------------------------------|
| LABEL | COUNT | DEPTH | METRIC | SUM |
|---------------------------------------------------|--------|--------|------------|--------|
| |0>>> run | 1 | 0 | trip_count | 1 |
| |0>>> |_fib | 1 | 1 | trip_count | 1 |
| |0>>> |_fib | 2 | 2 | trip_count | 2 |
| |0>>> |_fib | 4 | 3 | trip_count | 4 |
| |0>>> |_fib | 8 | 4 | trip_count | 8 |
| |0>>> |_fib | 16 | 5 | trip_count | 16 |
| |0>>> |_fib | 32 | 6 | trip_count | 32 |
| |0>>> |_fib | 64 | 7 | trip_count | 64 |
| |0>>> |_fib | 128 | 8 | trip_count | 128 |
| |0>>> |_fib | 256 | 9 | trip_count | 256 |
| |0>>> |_fib | 512 | 10 | trip_count | 512 |
| |0>>> |_fib | 1024 | 11 | trip_count | 1024 |
| |0>>> |_fib | 2026 | 12 | trip_count | 2026 |
| |0>>> |_fib | 3632 | 13 | trip_count | 3632 |
| |0>>> |_fib | 5020 | 14 | trip_count | 5020 |
| |0>>> |_fib | 4760 | 15 | trip_count | 4760 |
| |0>>> |_fib | 2942 | 16 | trip_count | 2942 |
| |0>>> |_fib | 1152 | 17 | trip_count | 1152 |
| |0>>> |_fib | 274 | 18 | trip_count | 274 |
| |0>>> |_fib | 36 | 19 | trip_count | 36 |
| |0>>> |_fib | 2 | 20 | trip_count | 2 |
| |0>>> |_inefficient | 1 | 1 | trip_count | 1 |
|-------------------------------------------------------------------------------------------|
```
> ***When `omnitrace-python` is used without built-ins, the profiling results will likely be cluttered by***
> ***numerous functions called during the importing of more complex modules, e.g. `import numpy`.***
### OmniTrace Python Source Instrumentation Configuration
Within the Python source code, the profiler can be configured by directly modifying the `omnitrace.profiler.config` data fields.
```python
import sys
def fib(n):
return n if n < 2 else (fib(n - 1) + fib(n - 2))
def inefficient(n):
a = 0
for i in range(n):
a += i
for j in range(n):
a += j
return a
def run(n):
return fib(n) + inefficient(n)
if __name__ == "__main__":
from omnitrace.profiler import config
from omnitrace import profile
config.include_args = True
config.include_filename = False
config.include_line = False
config.restrict_functions += ["fib", "run"]
with profile():
run(5)
```
Executing this script would produce:
```console
|------------------------------------------------------------------|
| COUNTS NUMBER OF INVOCATIONS |
|------------------------------------------------------------------|
| LABEL | COUNT | DEPTH | METRIC | SUM |
|--------------------------|--------|--------|------------|--------|
| |0>>> run(n=5) | 1 | 0 | trip_count | 1 |
| |0>>> |_fib(n=5) | 1 | 1 | trip_count | 1 |
| |0>>> |_fib(n=4) | 1 | 2 | trip_count | 1 |
| |0>>> |_fib(n=3) | 1 | 3 | trip_count | 1 |
| |0>>> |_fib(n=2) | 1 | 4 | trip_count | 1 |
| |0>>> |_fib(n=1) | 1 | 5 | trip_count | 1 |
| |0>>> |_fib(n=0) | 1 | 5 | trip_count | 1 |
| |0>>> |_fib(n=1) | 1 | 4 | trip_count | 1 |
| |0>>> |_fib(n=2) | 1 | 3 | trip_count | 1 |
| |0>>> |_fib(n=1) | 1 | 4 | trip_count | 1 |
| |0>>> |_fib(n=0) | 1 | 4 | trip_count | 1 |
| |0>>> |_fib(n=3) | 1 | 2 | trip_count | 1 |
| |0>>> |_fib(n=2) | 1 | 3 | trip_count | 1 |
| |0>>> |_fib(n=1) | 1 | 4 | trip_count | 1 |
| |0>>> |_fib(n=0) | 1 | 4 | trip_count | 1 |
| |0>>> |_fib(n=1) | 1 | 3 | trip_count | 1 |
|------------------------------------------------------------------|
```
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