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109 lines
5.0 KiB
C++
109 lines
5.0 KiB
C++
// Copyright (c) 2011 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// This file contains macros to simplify histogram reporting from the disk
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// cache. The main issue is that we want to have separate histograms for each
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// type of cache (regular vs. media, etc), without adding the complexity of
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// keeping track of a potentially large number of histogram objects that have to
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// survive the backend object that created them.
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#ifndef NET_DISK_CACHE_BLOCKFILE_HISTOGRAM_MACROS_H_
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#define NET_DISK_CACHE_BLOCKFILE_HISTOGRAM_MACROS_H_
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#include "base/metrics/histogram.h"
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// -----------------------------------------------------------------------------
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// These histograms follow the definition of UMA_HISTOGRAMN_XXX except that
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// the counter is not cached locally.
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#define CACHE_HISTOGRAM_CUSTOM_COUNTS(name, sample, min, max, bucket_count) \
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do { \
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base::HistogramBase* counter = base::Histogram::FactoryGet( \
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name, min, max, bucket_count, \
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base::Histogram::kUmaTargetedHistogramFlag); \
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counter->Add(sample); \
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} while (0)
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#define CACHE_HISTOGRAM_COUNTS(name, sample) CACHE_HISTOGRAM_CUSTOM_COUNTS( \
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name, sample, 1, 1000000, 50)
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#define CACHE_HISTOGRAM_COUNTS_10000(name, sample) \
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CACHE_HISTOGRAM_CUSTOM_COUNTS(name, sample, 1, 10000, 50)
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#define CACHE_HISTOGRAM_COUNTS_50000(name, sample) \
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CACHE_HISTOGRAM_CUSTOM_COUNTS(name, sample, 1, 50000000, 50)
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#define CACHE_HISTOGRAM_CUSTOM_TIMES(name, sample, min, max, bucket_count) \
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do { \
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base::HistogramBase* counter = base::Histogram::FactoryTimeGet( \
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name, min, max, bucket_count, \
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base::Histogram::kUmaTargetedHistogramFlag); \
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counter->AddTime(sample); \
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} while (0)
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#define CACHE_HISTOGRAM_TIMES(name, sample) CACHE_HISTOGRAM_CUSTOM_TIMES( \
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name, sample, base::TimeDelta::FromMilliseconds(1), \
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base::TimeDelta::FromSeconds(10), 50)
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#define CACHE_HISTOGRAM_ENUMERATION(name, sample, boundary_value) do { \
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base::HistogramBase* counter = base::LinearHistogram::FactoryGet( \
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name, 1, boundary_value, boundary_value + 1, \
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base::Histogram::kUmaTargetedHistogramFlag); \
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counter->Add(sample); \
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} while (0)
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#define CACHE_HISTOGRAM_PERCENTAGE(name, under_one_hundred) \
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CACHE_HISTOGRAM_ENUMERATION(name, under_one_hundred, 101)
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// -----------------------------------------------------------------------------
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// HISTOGRAM_HOURS will collect time related data with a granularity of hours
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// and normal values of a few months.
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#define CACHE_HISTOGRAM_HOURS CACHE_HISTOGRAM_COUNTS_10000
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// HISTOGRAM_AGE will collect time elapsed since |initial_time|, with a
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// granularity of hours and normal values of a few months.
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#define CACHE_HISTOGRAM_AGE(name, initial_time) \
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CACHE_HISTOGRAM_COUNTS_10000(name, \
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(base::Time::Now() - initial_time).InHours())
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// HISTOGRAM_AGE_MS will collect time elapsed since |initial_time|, with the
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// normal resolution of the UMA_HISTOGRAM_TIMES.
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#define CACHE_HISTOGRAM_AGE_MS(name, initial_time)\
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CACHE_HISTOGRAM_TIMES(name, base::TimeTicks::Now() - initial_time)
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#define CACHE_HISTOGRAM_CACHE_ERROR(name, sample) \
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CACHE_HISTOGRAM_ENUMERATION(name, sample, 50)
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// Generates a UMA histogram of the given type, generating the proper name for
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// it (asking backend_->HistogramName), and adding the provided sample.
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// For example, to generate a regualar UMA_HISTOGRAM_COUNTS, this macro would
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// be used as:
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// CACHE_UMA(COUNTS, "MyName", 0, 20);
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// CACHE_UMA(COUNTS, "MyExperiment", 530, 55);
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// which roughly translates to:
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// UMA_HISTOGRAM_COUNTS_1M("DiskCache.2.MyName", 20); // "2" is the CacheType.
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// UMA_HISTOGRAM_COUNTS_1M("DiskCache.2.MyExperiment_530", 55);
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//
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#define CACHE_UMA(type, name, experiment, sample) \
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{ \
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const std::string my_name = \
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CACHE_UMA_BACKEND_IMPL_OBJ->HistogramName(name, experiment); \
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switch (CACHE_UMA_BACKEND_IMPL_OBJ->cache_type()) { \
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default: \
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NOTREACHED(); \
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FALLTHROUGH; \
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case net::DISK_CACHE: \
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case net::MEDIA_CACHE: \
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case net::APP_CACHE: \
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case net::SHADER_CACHE: \
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case net::PNACL_CACHE: \
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CACHE_HISTOGRAM_##type(my_name.data(), sample); \
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break; \
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} \
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}
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#endif // NET_DISK_CACHE_BLOCKFILE_HISTOGRAM_MACROS_H_
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