53 lines
1.9 KiB
Python
53 lines
1.9 KiB
Python
#!/usr/bin/python
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# Copyright (C) 2019 The Android Open Source Project
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# This synthetic trace tests legacy rss_stat events on old kernels which
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# do not have the mm_id change and thus we cannot accurately track
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# rss changes when one process changes another's mm struct.
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from os import sys, path
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sys.path.append(path.dirname(path.dirname(path.abspath(__file__))))
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import synth_common
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trace = synth_common.create_trace()
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trace.add_packet(ts=1)
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trace.add_process(10, 0, "process")
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trace.add_ftrace_packet(0)
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# Create a new child process (treated internally as a thread) of kthreadd.
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trace.add_newtask(ts=50, tid=2, new_tid=3, new_comm="kthread_child", flags=0)
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# Add an event on tid 3 which affects its own rss.
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trace.add_rss_stat(ts=90, tid=3, member=0, size=9)
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# Add an event on tid 10 from tid 3. This emlates e.g. background reclaim
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# where kthreadd is cleaning up the mm struct of another process.
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trace.add_rss_stat(ts=91, tid=3, member=0, size=900)
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# Add an event for tid 3 from tid 10. This emulates e.g. direct reclaim
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# where a process reaches into another process' mm struct.
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trace.add_rss_stat(ts=99, tid=10, member=0, size=10)
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# Add an event on tid 10 which affects its own rss.
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trace.add_rss_stat(ts=100, tid=10, member=0, size=1000)
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# Add an event on tid 10 from tid 3.
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trace.add_rss_stat(ts=101, tid=3, member=0, size=900)
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print(trace.trace.SerializeToString())
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