Import benchmark-tools to main repository.

This has adapted for use with bazel from the original commit
a26e93769ebefd82593a43e22fb13a09717cfa6d.

In particular, the style has been made consistent with internal python style
guidelines, and the packages (including the main entrypoint) have been
refactored in order to allow bazel testing targets.

PiperOrigin-RevId: 283484433

1 files changed, 121 insertions, 0 deletions

diff --git a/benchmarks/suites/density.py b/benchmarks/suites/density.py
new file mode 100644
index 000000000..89d29fb26
--- /dev/null
+++ b/benchmarks/suites/density.py
@@ -0,0 +1,121 @@
+# python3
+# Copyright 2019 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Density tests."""
+
+import re
+import types
+
+from benchmarks import suites
+from benchmarks.harness import container
+from benchmarks.harness import machine
+from benchmarks.suites import helpers
+
+
+# pylint: disable=unused-argument
+def memory_usage(value, **kwargs):
+  """Returns the passed value."""
+  return value
+
+
+def density(target: machine.Machine,
+            workload: str,
+            count: int = 50,
+            wait: float = 0,
+            load_func: types.FunctionType = None,
+            **kwargs):
+  """Calculate the average memory usage per container.
+
+  Args:
+    target: A machine object.
+    workload: The workload to run.
+    count: The number of containers to start.
+    wait: The time to wait after starting.
+    load_func: Callback that is called after count images have been started on
+      the given machine.
+    **kwargs: Additional container options.
+
+  Returns:
+    The average usage in Kb per container.
+  """
+  count = int(count)
+
+  # Drop all caches.
+  helpers.drop_caches(target)
+  before = target.read("/proc/meminfo")
+
+  # Load the workload.
+  image = target.pull(workload)
+
+  with target.container(
+      image=image, count=count, **kwargs).detach() as containers:
+    # Call the optional load function callback if given.
+    if load_func:
+      load_func(target, containers)
+    # Wait 'wait' time before taking a measurement.
+    target.sleep(wait)
+
+    # Drop caches again.
+    helpers.drop_caches(target)
+    after = target.read("/proc/meminfo")
+
+  # Calculate the memory used.
+  available_re = re.compile(r"MemAvailable:\s*(\d+)\skB\n")
+  before_available = available_re.findall(before)
+  after_available = available_re.findall(after)
+  return 1024 * float(int(before_available[0]) -
+                      int(after_available[0])) / float(count)
+
+
+def load_redis(target: machine.Machine, containers: container.Container):
+  """Use redis-benchmark "LPUSH" to load each container with 1G of data.
+
+  Args:
+    target: A machine object.
+    containers: A set of containers.
+  """
+  target.pull("redisbenchmark")
+  for name in containers.get_names():
+    flags = "-d 10000 -t LPUSH"
+    target.container(
+        "redisbenchmark", links={
+            name: name
+        }).run(
+            host=name, flags=flags)
+
+
+@suites.benchmark(metrics=[memory_usage], machines=1)
+def empty(target: machine.Machine, **kwargs) -> float:
+  """Run trivial containers in a density test."""
+  return density(target, workload="sleep", wait=1.0, **kwargs)
+
+
+@suites.benchmark(metrics=[memory_usage], machines=1)
+def node(target: machine.Machine, **kwargs) -> float:
+  """Run node containers in a density test."""
+  return density(target, workload="node", wait=3.0, **kwargs)
+
+
+@suites.benchmark(metrics=[memory_usage], machines=1)
+def ruby(target: machine.Machine, **kwargs) -> float:
+  """Run ruby containers in a density test."""
+  return density(target, workload="ruby", wait=3.0, **kwargs)
+
+
+@suites.benchmark(metrics=[memory_usage], machines=1)
+def redis(target: machine.Machine, **kwargs) -> float:
+  """Run redis containers in a density test."""
+  if "count" not in kwargs:
+    kwargs["count"] = 5
+  return density(
+      target, workload="redis", wait=3.0, load_func=load_redis, **kwargs)