Added support for pypy3 system metrics (#2062)

* Added support for pypy3 system metrics

Co-authored-by: Suryanarayana Peri <suryanarayana.peri@fmr.com>
Signed-off-by: Rahul Kumar <Rahul.Kumar@fmr.com>

* Change in if condition to log warn message for pypy
Co-authored-by: Suryanarayana Peri <suryanarayana.peri@fmr.com>

Signed-off-by: Rahul Kumar <Rahul.Kumar@fmr.com>

* Added logger to else block if pypy
Co-authored-by: Suryanarayana Peri <suryanarayana.peri@fmr.com>

Signed-off-by: Rahul Kumar <Rahul.Kumar@fmr.com>

* Reverting the changes
Co-authored-by: Suryanarayana Peri <suryanarayana.peri@fmr.com>

Signed-off-by: Rahul Kumar <Rahul.Kumar@fmr.com>

* Changes requested by external reviewer
Co-authored-by: Suryanarayana Peri <suryanarayana.peri@fmr.com>

Signed-off-by: Rahul Kumar <Rahul.Kumar@fmr.com>

---------

Signed-off-by: Rahul Kumar <Rahul.Kumar@fmr.com>
Co-authored-by: Suryanarayana Peri <suryanarayana.peri@fmr.com>

CHANGELOG.md

@@ -1394,6 +1394,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `opentelemetry-ext-wsgi` Updates for core library changes
 - `opentelemetry-ext-http-requests` Updates for core library changes
 
+- `Added support for PyPy3` Initial release
+## [#1033](https://github.com/open-telemetryopentelemetry-python-contrib/issues/1033)
+
 ## Version 0.1a0 (2019-09-30)
 
 ### Added

instrumentation/opentelemetry-instrumentation-system-metrics/src/opentelemetry/instrumentation/system_metrics/__init__.py

@@ -77,6 +77,7 @@ API
 
 import gc
 import os
+import logging
 import threading
 from platform import python_implementation
 from typing import Collection, Dict, Iterable, List, Optional
@@ -91,6 +92,9 @@ from opentelemetry.instrumentation.system_metrics.version import __version__
 from opentelemetry.metrics import CallbackOptions, Observation, get_meter
 from opentelemetry.sdk.util import get_dict_as_key
 
+_logger = logging.getLogger(__name__)
+
+
 _DEFAULT_CONFIG = {
     "system.cpu.time": ["idle", "user", "system", "irq"],
     "system.cpu.utilization": ["idle", "user", "system", "irq"],
@@ -352,12 +356,18 @@ class SystemMetricsInstrumentor(BaseInstrumentor):
             )
 
         if "process.runtime.gc_count" in self._config:
-            self._meter.create_observable_counter(
+            if self._python_implementation == "pypy":
-                name=f"process.runtime.{self._python_implementation}.gc_count",
+                _logger.warning(
-                callbacks=[self._get_runtime_gc_count],
+                        "The process.runtime.gc_count metric won't be collected because the interpreter is PyPy"
-                description=f"Runtime {self._python_implementation} GC count",
+                )
-                unit="bytes",
+            else:
-            )
+                self._meter.create_observable_counter(
+                    name=f"process.runtime.{self._python_implementation}.gc_count",
+                    callbacks=[self._get_runtime_gc_count],
+                    description=f"Runtime {self._python_implementation} GC count",
+                    unit="bytes",
+                )
+             
 
         if "process.runtime.thread_count" in self._config:
             self._meter.create_observable_up_down_counter(

instrumentation/opentelemetry-instrumentation-system-metrics/tests/test_system_metrics.py

@@ -16,7 +16,7 @@
 
 from collections import namedtuple
 from platform import python_implementation
-from unittest import mock
+from unittest import mock, skipIf
 
 from opentelemetry.sdk.metrics import MeterProvider
 from opentelemetry.sdk.metrics.export import InMemoryMetricReader
@@ -97,7 +97,6 @@ class TestSystemMetrics(TestBase):
             for scope_metrics in resource_metrics.scope_metrics:
                 for metric in scope_metrics.metrics:
                     metric_names.append(metric.name)
-        self.assertEqual(len(metric_names), 21)
 
         observer_names = [
             "system.cpu.time",
@@ -117,11 +116,16 @@ class TestSystemMetrics(TestBase):
             "system.thread_count",
             f"process.runtime.{self.implementation}.memory",
             f"process.runtime.{self.implementation}.cpu_time",
-            f"process.runtime.{self.implementation}.gc_count",
             f"process.runtime.{self.implementation}.thread_count",
             f"process.runtime.{self.implementation}.context_switches",
             f"process.runtime.{self.implementation}.cpu.utilization",
         ]
+        
+        if self.implementation == "pypy":
+            self.assertEqual(len(metric_names), 20)
+        else:
+            self.assertEqual(len(metric_names), 21)
+        observer_names.append(f"process.runtime.{self.implementation}.gc_count",)
 
         for observer in metric_names:
             self.assertIn(observer, observer_names)
@@ -131,11 +135,13 @@ class TestSystemMetrics(TestBase):
         runtime_config = {
             "process.runtime.memory": ["rss", "vms"],
             "process.runtime.cpu.time": ["user", "system"],
-            "process.runtime.gc_count": None,
             "process.runtime.thread_count": None,
             "process.runtime.cpu.utilization": None,
             "process.runtime.context_switches": ["involuntary", "voluntary"],
         }
+        
+        if self.implementation != "pypy":
+            runtime_config["process.runtime.gc_count"] = None
 
         reader = InMemoryMetricReader()
         meter_provider = MeterProvider(metric_readers=[reader])
@@ -147,17 +153,21 @@ class TestSystemMetrics(TestBase):
             for scope_metrics in resource_metrics.scope_metrics:
                 for metric in scope_metrics.metrics:
                     metric_names.append(metric.name)
-        self.assertEqual(len(metric_names), 6)
 
         observer_names = [
             f"process.runtime.{self.implementation}.memory",
             f"process.runtime.{self.implementation}.cpu_time",
-            f"process.runtime.{self.implementation}.gc_count",
             f"process.runtime.{self.implementation}.thread_count",
             f"process.runtime.{self.implementation}.context_switches",
             f"process.runtime.{self.implementation}.cpu.utilization",
         ]
 
+        if self.implementation == "pypy":
+            self.assertEqual(len(metric_names), 5)
+        else:
+            self.assertEqual(len(metric_names), 6)
+        observer_names.append(f"process.runtime.{self.implementation}.gc_count")
+
         for observer in metric_names:
             self.assertIn(observer, observer_names)
             observer_names.remove(observer)
@@ -781,6 +791,7 @@ class TestSystemMetrics(TestBase):
         )
 
     @mock.patch("gc.get_count")
+    @skipIf(python_implementation().lower() == "pypy", "not supported for pypy")
     def test_runtime_get_count(self, mock_gc_get_count):
         mock_gc_get_count.configure_mock(**{"return_value": (1, 2, 3)})
 

tox.ini

@@ -194,7 +194,7 @@ envlist =
 
     ; opentelemetry-instrumentation-system-metrics
     py3{6,7,8,9,10,11}-test-instrumentation-system-metrics
-    ; instrumentation-system-metrics intentionally excluded from pypy3
+    pypy3-test-instrumentation-system-metrics
 
     ; opentelemetry-instrumentation-tornado
     py3{7,8,9,10,11}-test-instrumentation-tornado