mem-tracker-test.cc

Go to the documentation of this file.

// Copyright 2013 Cloudera Inc.
//
// 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.

#include <string>
#include <gtest/gtest.h>

#include "runtime/mem-tracker.h"
#include "util/metrics.h"

#include "common/names.h"

namespace impala {

TEST(MemTestTest, SingleTrackerNoLimit) {
  MemTracker t;
  EXPECT_FALSE(t.has_limit());
  t.Consume(10);
  EXPECT_EQ(t.consumption(), 10);
  t.Consume(10);
  EXPECT_EQ(t.consumption(), 20);
  t.Release(15);
  EXPECT_EQ(t.consumption(), 5);
  EXPECT_FALSE(t.LimitExceeded());
}

TEST(MemTestTest, SingleTrackerWithLimit) {
  MemTracker t(11);
  EXPECT_TRUE(t.has_limit());
  t.Consume(10);
  EXPECT_EQ(t.consumption(), 10);
  EXPECT_FALSE(t.LimitExceeded());
  t.Consume(10);
  EXPECT_EQ(t.consumption(), 20);
  EXPECT_TRUE(t.LimitExceeded());
  t.Release(15);
  EXPECT_EQ(t.consumption(), 5);
  EXPECT_FALSE(t.LimitExceeded());
}

TEST(MemTestTest, ConsumptionMetric) {
  UIntGauge metric("test", TUnit::BYTES, 0);
  EXPECT_EQ(metric.value(), 0);

  MemTracker t(&metric, 100, -1, "");
  EXPECT_TRUE(t.has_limit());
  EXPECT_EQ(t.consumption(), 0);

  // Consume()/Release() arguments have no effect
  t.Consume(150);
  EXPECT_EQ(t.consumption(), 0);
  EXPECT_EQ(t.peak_consumption(), 0);
  EXPECT_FALSE(t.LimitExceeded());
  t.Release(5);
  EXPECT_EQ(t.consumption(), 0);
  EXPECT_EQ(t.peak_consumption(), 0);
  EXPECT_FALSE(t.LimitExceeded());

  metric.Increment(10);
  // consumption_ is only updated with consumption_metric_ after calls to
  // Consume()/Release()
  t.Consume(0);
  EXPECT_EQ(t.consumption(), 10);
  EXPECT_EQ(t.peak_consumption(), 10);
  metric.Increment(-5);
  t.Consume(0);
  EXPECT_EQ(t.consumption(), 5);
  EXPECT_EQ(t.peak_consumption(), 10);
  EXPECT_FALSE(t.LimitExceeded());
  metric.Increment(150);
  t.Consume(0);
  EXPECT_EQ(t.consumption(), 155);
  EXPECT_EQ(t.peak_consumption(), 155);
  EXPECT_TRUE(t.LimitExceeded());
  metric.Increment(-150);
  t.Consume(0);
  EXPECT_EQ(t.consumption(), 5);
  EXPECT_EQ(t.peak_consumption(), 155);
  EXPECT_FALSE(t.LimitExceeded());
}

TEST(MemTestTest, TrackerHierarchy) {
  MemTracker p(100);
  MemTracker c1(80, -1, "", &p);
  MemTracker c2(50, -1, "", &p);

  // everything below limits
  c1.Consume(60);
  EXPECT_EQ(c1.consumption(), 60);
  EXPECT_FALSE(c1.LimitExceeded());
  EXPECT_FALSE(c1.AnyLimitExceeded());
  EXPECT_EQ(c2.consumption(), 0);
  EXPECT_FALSE(c2.LimitExceeded());
  EXPECT_FALSE(c2.AnyLimitExceeded());
  EXPECT_EQ(p.consumption(), 60);
  EXPECT_FALSE(p.LimitExceeded());
  EXPECT_FALSE(p.AnyLimitExceeded());

  // p goes over limit
  c2.Consume(50);
  EXPECT_EQ(c1.consumption(), 60);
  EXPECT_FALSE(c1.LimitExceeded());
  EXPECT_TRUE(c1.AnyLimitExceeded());
  EXPECT_EQ(c2.consumption(), 50);
  EXPECT_FALSE(c2.LimitExceeded());
  EXPECT_TRUE(c2.AnyLimitExceeded());
  EXPECT_EQ(p.consumption(), 110);
  EXPECT_TRUE(p.LimitExceeded());

  // c2 goes over limit, p drops below limit
  c1.Release(20);
  c2.Consume(10);
  EXPECT_EQ(c1.consumption(), 40);
  EXPECT_FALSE(c1.LimitExceeded());
  EXPECT_FALSE(c1.AnyLimitExceeded());
  EXPECT_EQ(c2.consumption(), 60);
  EXPECT_TRUE(c2.LimitExceeded());
  EXPECT_TRUE(c2.AnyLimitExceeded());
  EXPECT_EQ(p.consumption(), 100);
  EXPECT_FALSE(p.LimitExceeded());
}

class GcFunctionHelper {
 public:
  static const int NUM_RELEASE_BYTES = 1;

  GcFunctionHelper(MemTracker* tracker) : tracker_(tracker) { }

  void GcFunc() { tracker_->Release(NUM_RELEASE_BYTES); }

 private:
  MemTracker* tracker_;
};

TEST(MemTestTest, GcFunctions) {
  MemTracker t(10);
  ASSERT_TRUE(t.has_limit());

  t.Consume(9);
  EXPECT_FALSE(t.LimitExceeded());

  // Test TryConsume()
  EXPECT_FALSE(t.TryConsume(2));
  EXPECT_EQ(t.consumption(), 9);
  EXPECT_FALSE(t.LimitExceeded());

  // Attach GcFunction that releases 1 byte
  GcFunctionHelper gc_func_helper(&t);
  t.AddGcFunction(boost::bind(&GcFunctionHelper::GcFunc, &gc_func_helper));
  EXPECT_TRUE(t.TryConsume(2));
  EXPECT_EQ(t.consumption(), 10);
  EXPECT_FALSE(t.LimitExceeded());

  // GcFunction will be called even though TryConsume() fails
  EXPECT_FALSE(t.TryConsume(2));
  EXPECT_EQ(t.consumption(), 9);
  EXPECT_FALSE(t.LimitExceeded());

  // GcFunction won't be called
  EXPECT_TRUE(t.TryConsume(1));
  EXPECT_EQ(t.consumption(), 10);
  EXPECT_FALSE(t.LimitExceeded());

  // Test LimitExceeded()
  t.Consume(1);
  EXPECT_EQ(t.consumption(), 11);
  EXPECT_FALSE(t.LimitExceeded());
  EXPECT_EQ(t.consumption(), 10);

  // Add more GcFunctions, test that we only call them until the limit is no longer
  // exceeded
  GcFunctionHelper gc_func_helper2(&t);
  t.AddGcFunction(boost::bind(&GcFunctionHelper::GcFunc, &gc_func_helper2));
  GcFunctionHelper gc_func_helper3(&t);
  t.AddGcFunction(boost::bind(&GcFunctionHelper::GcFunc, &gc_func_helper3));
  t.Consume(1);
  EXPECT_EQ(t.consumption(), 11);
  EXPECT_FALSE(t.LimitExceeded());
  EXPECT_EQ(t.consumption(), 10);
}

}

int main(int argc, char **argv) {
  ::testing::InitGoogleTest(&argc, argv);
  return RUN_ALL_TESTS();
}