80 lines
3.2 KiB
Python
80 lines
3.2 KiB
Python
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# Copyright 2013 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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import sys
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from metrics import Metric
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class MemoryMetric(Metric):
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"""MemoryMetric gathers memory statistics from the browser object."""
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def __init__(self, browser):
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super(MemoryMetric, self).__init__()
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self._browser = browser
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self._memory_stats = None
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self._start_commit_charge = None
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def Start(self, page=None, tab=None):
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"""Record the initial value of 'SystemCommitCharge'."""
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self._start_commit_charge = self._browser.memory_stats['SystemCommitCharge']
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def Stop(self, page=None, tab=None):
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"""Fetch the browser memory stats."""
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assert self._start_commit_charge, 'Must call Start() first'
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self._memory_stats = self._browser.memory_stats
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def AddResults(self, tab, results):
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"""Add summary results to the results object."""
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assert self._memory_stats, 'Must call Stop() first'
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if not self._memory_stats['Browser']:
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return
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metric = 'resident_set_size'
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if sys.platform == 'win32':
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metric = 'working_set'
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def AddSummariesForProcessTypes(process_types_memory, process_type_trace):
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"""Add all summaries to the results for a given set of process types.
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Args:
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process_types_memory: A list of process types, e.g. Browser, 'Renderer'
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process_type_trace: The name of this set of process types in the output
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"""
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def AddSummary(value_name_memory, value_name_trace):
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"""Add a summary to the results for a given statistic.
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Args:
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value_name_memory: Name of some statistic, e.g. VM, WorkingSetSize
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value_name_trace: Name of this statistic to be used in the output
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"""
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if len(process_types_memory) > 1 and value_name_memory.endswith('Peak'):
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return
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values = []
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for process_type_memory in process_types_memory:
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stats = self._memory_stats[process_type_memory]
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if value_name_memory in stats:
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values.append(stats[value_name_memory])
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if values:
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results.AddSummary(value_name_trace + process_type_trace,
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'bytes', sum(values), data_type='unimportant')
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AddSummary('VM', 'vm_final_size_')
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AddSummary('WorkingSetSize', 'vm_%s_final_size_' % metric)
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AddSummary('PrivateDirty', 'vm_private_dirty_final_')
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AddSummary('ProportionalSetSize', 'vm_proportional_set_size_final_')
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AddSummary('VMPeak', 'vm_peak_size_')
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AddSummary('WorkingSetSizePeak', '%s_peak_size_' % metric)
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AddSummariesForProcessTypes(['Browser'], 'browser')
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AddSummariesForProcessTypes(['Renderer'], 'renderer')
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AddSummariesForProcessTypes(['Gpu'], 'gpu')
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AddSummariesForProcessTypes(['Browser', 'Renderer', 'Gpu'], 'total')
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end_commit_charge = self._memory_stats['SystemCommitCharge']
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commit_charge_difference = end_commit_charge - self._start_commit_charge
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results.AddSummary('commit_charge', 'kb', commit_charge_difference,
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data_type='unimportant')
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results.AddSummary('processes', 'count', self._memory_stats['ProcessCount'],
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data_type='unimportant')
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