From 02043a2f9a10213cafb8723aaf1b893f78b929e6 Mon Sep 17 00:00:00 2001
From: ganesh-k13 <ganesh3597@gmail.com>
Date: Sun, 24 Jul 2022 12:40:31 +0530
Subject: [PATCH] ENH: Added `show_runtime`

1. Information is derived with the help of `threadpoolctl` library.
2. In case `threadpoolctl` is not installed, a message is displayed
   with help on how to install it.
3. SIMD related information is derived from `__cpu_features__`,
   `__cpu_baseline__` and `__cpu_dispatch__`
---
 numpy/__init__.py            |  1 +
 numpy/distutils/misc_util.py | 78 ++++++++++++++++++++++++++++++++++++
 2 files changed, 79 insertions(+)

diff --git a/numpy/__init__.py b/numpy/__init__.py
index 66b8e3eca2c7..3000f3eaa6cb 100644
--- a/numpy/__init__.py
+++ b/numpy/__init__.py
@@ -122,6 +122,7 @@
 else:
     try:
         from numpy.__config__ import show as show_config
+        from numpy.__config__ import runtime as show_runtime
     except ImportError as e:
         msg = """Error importing numpy: you should not try to import numpy from
         its source directory; please exit the numpy source tree, and relaunch
diff --git a/numpy/distutils/misc_util.py b/numpy/distutils/misc_util.py
index b3916a2c8c7a..dd5ec256937c 100644
--- a/numpy/distutils/misc_util.py
+++ b/numpy/distutils/misc_util.py
@@ -2452,6 +2452,84 @@ def show():
                 print("    found = %s" % (','.join(features_found)))
                 print("    not found = %s" % (','.join(features_not_found)))
 
+            def runtime():
+                """
+                Print information about various resources in the system
+                including available intrinsic support and BLAS/LAPACK library
+                in use
+
+                See Also
+                --------
+                show_config : Show libraries in the system on which
+                              NumPy was built.
+
+                Notes
+                -----
+                1. Information is derived with the help of `threadpoolctl`
+                   library.
+                2. In case `threadpoolctl` is not installed, a message is
+                   displayed with help on how to install it.
+                3. SIMD related information is derived from `__cpu_features__`,
+                   `__cpu_baseline__` and `__cpu_dispatch__`
+
+                Examples
+                -----
+                >>> import numpy as np
+                >>> np.show_runtime()
+                [{'simd_extensions': {'baseline': ['SSE', 'SSE2', 'SSE3'],
+                                      'found': ['SSSE3',
+                                                'SSE41',
+                                                'POPCNT',
+                                                'SSE42',
+                                                'AVX',
+                                                'F16C',
+                                                'FMA3',
+                                                'AVX2'],
+                                      'not_found': ['AVX512F',
+                                                    'AVX512CD',
+                                                    'AVX512_KNL',
+                                                    'AVX512_KNM',
+                                                    'AVX512_SKX',
+                                                    'AVX512_CLX',
+                                                    'AVX512_CNL',
+                                                    'AVX512_ICL']}},
+                 {'architecture': 'Zen',
+                  'filepath': '/usr/lib/x86_64-linux-gnu/openblas-pthread/libopenblasp-r0.3.20.so',
+                  'internal_api': 'openblas',
+                  'num_threads': 12,
+                  'prefix': 'libopenblas',
+                  'threading_layer': 'pthreads',
+                  'user_api': 'blas',
+                  'version': '0.3.20'}]
+                """
+                from numpy.core._multiarray_umath import (
+                    __cpu_features__, __cpu_baseline__, __cpu_dispatch__
+                )
+                from pprint import pprint
+
+                config_found = []
+                features_found, features_not_found = [], []
+                for feature in __cpu_dispatch__:
+                    if __cpu_features__[feature]:
+                        features_found.append(feature)
+                    else:
+                        features_not_found.append(feature)
+                config_found.append({
+                    "simd_extensions": {
+                        "baseline": __cpu_baseline__,
+                        "found": features_found,
+                        "not_found": features_not_found
+                    }
+                })
+                try:
+                    from threadpoolctl import threadpool_info
+                    config_found.extend(threadpool_info())
+                except ImportError:
+                    print("WARNING: `threadpoolctl` not found in system!"
+                          " Install it by `pip install threadpoolctl`."
+                          " Once installed, try `np.show_config` again"
+                          " for more detailed build information")
+                pprint(config_found)
                     '''))
 
     return target