This is xnu-12377.1.9. See this file in:
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<array>
<dict>
<key>Enums</key>
<dict>
<key>EsyncSpace</key>
<dict>
<key>0</key>
<string>Test</string>
<key>1</key>
<string>Exclaves Queue</string>
<key>2</key>
<string>Exclaves Thread</string>
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<key>Name</key>
<string>Epoch Sync</string>
<key>Children</key>
<array>
<dict>
<key>Name</key>
<string>Epoch Sync Wait Stale</string>
<key>Type</key>
<string>Impulse</string>
<key>KTraceCode</key>
<string>0x12c0000</string>
<key>EventsMatchedBy</key>
<string>Thread</string>
<key>ArgNames</key>
<dict>
<key>Arg1</key>
<string>Id</string>
<key>Arg2</key>
<string>Epoch</string>
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<key>Labels</key>
<dict>
<key>ID</key>
<dict>
<key>Value</key>
<dict>
<key>Arg</key>
<integer>1</integer>
<key>BitRange</key>
<array>
<integer>0</integer>
<integer>55</integer>
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<key>EsyncSpace</key>
<dict>
<key>Value</key>
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<key>Arg</key>
<integer>1</integer>
<key>BitRange</key>
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<integer>56</integer>
<integer>63</integer>
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<key>Format</key>
<string>EsyncSpace</string>
</dict>
</dict>
</dict>
<dict>
<key>Name</key>
<string>Epoch Sync Wait</string>
<key>Type</key>
<string>Interval</string>
<key>KTraceCodeBegin</key>
<string>0x12c0005</string>
<key>KTraceCodeEnd</key>
<string>0x12c0006</string>
<key>EventsMatchedBy</key>
<string>Thread</string>
<key>ArgNamesBegin</key>
<dict>
<key>Arg1</key>
<string>ID</string>
<key>Arg2</key>
<string>Epoch</string>
<key>Arg3</key>
<string>Owner</string>
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<key>ArgValueTypesBegin</key>
<dict>
<key>Arg3</key>
<string>ThreadName</string>
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<key>Labels</key>
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<key>ID</key>
<dict>
<key>Value</key>
<dict>
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<true/>
<key>Arg</key>
<integer>1</integer>
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<key>EsyncSpace</key>
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<key>Value</key>
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<true/>
<key>Arg</key>
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<key>Format</key>
<string>EsyncSpace</string>
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<key>ArgNamesEnd</key>
<dict>
<key>Arg1</key>
<string>Wait Result</string>
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<key>ArgValueLabelsEnd</key>
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<key>Arg1</key>
<dict>
<key>-1</key>
<string>Waiting</string>
<key>0x0</key>
<string>Awakened</string>
<key>0x1</key>
<string>Timed Out</string>
<key>0x2</key>
<string>Interrupted</string>
<key>0x3</key>
<string>Restart</string>
<key>0xa</key>
<string>Not Waiting</string>
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</dict>
</dict>
<dict>
<key>Name</key>
<string>Epoch Sync Wake - No Waiters</string>
<key>Type</key>
<string>Impulse</string>
<key>KTraceCode</key>
<string>0x12c0008</string>
<key>EventsMatchedBy</key>
<string>Thread</string>
<key>ArgNames</key>
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<key>Arg1</key>
<string>ID</string>
<key>Arg2</key>
<string>Epoch</string>
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<key>Labels</key>
<dict>
<key>ID</key>
<dict>
<key>Value</key>
<dict>
<key>Arg</key>
<integer>1</integer>
<key>BitRange</key>
<array>
<integer>0</integer>
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<key>EsyncSpace</key>
<dict>
<key>Value</key>
<dict>
<key>Arg</key>
<integer>1</integer>
<key>BitRange</key>
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<integer>63</integer>
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<key>Format</key>
<string>EsyncSpace</string>
</dict>
</dict>
</dict>
<dict>
<key>Name</key>
<string>Epoch Sync Wake One</string>
<key>Type</key>
<string>Impulse</string>
<key>KTraceCode</key>
<string>0x12c000c</string>
<key>EventsMatchedBy</key>
<string>Thread</string>
<key>ArgNames</key>
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<key>Arg1</key>
<string>ID</string>
<key>Arg2</key>
<string>Epoch</string>
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<key>Labels</key>
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<key>ID</key>
<dict>
<key>Value</key>
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<key>Arg</key>
<integer>1</integer>
<key>BitRange</key>
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<integer>55</integer>
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<key>EsyncSpace</key>
<dict>
<key>Value</key>
<dict>
<key>Arg</key>
<integer>1</integer>
<key>BitRange</key>
<array>
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<integer>63</integer>
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<key>Format</key>
<string>EsyncSpace</string>
</dict>
</dict>
</dict>
<dict>
<key>Name</key>
<string>Epoch Sync Wake All</string>
<key>Type</key>
<string>Impulse</string>
<key>KTraceCode</key>
<string>0x12c0010</string>
<key>EventsMatchedBy</key>
<string>Thread</string>
<key>ArgNames</key>
<dict>
<key>Arg1</key>
<string>ID</string>
<key>Arg2</key>
<string>Epoch</string>
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<key>Labels</key>
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<key>ID</key>
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<key>Value</key>
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<key>Arg</key>
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<key>EsyncSpace</key>
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<key>Value</key>
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<key>Arg</key>
<integer>1</integer>
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<key>Format</key>
<string>EsyncSpace</string>
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</dict>
</dict>
<dict>
<key>Name</key>
<string>Epoch Sync Wake With Owner</string>
<key>Type</key>
<string>Impulse</string>
<key>KTraceCode</key>
<string>0x12c0014</string>
<key>EventsMatchedBy</key>
<string>Thread</string>
<key>ArgNames</key>
<dict>
<key>Arg1</key>
<string>ID</string>
<key>Arg2</key>
<string>Epoch</string>
<key>Arg3</key>
<string>Owner</string>
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<key>Labels</key>
<dict>
<key>ID</key>
<dict>
<key>Value</key>
<dict>
<key>Arg</key>
<integer>1</integer>
<key>BitRange</key>
<array>
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<key>EsyncSpace</key>
<dict>
<key>Value</key>
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<key>Arg</key>
<integer>1</integer>
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<key>Format</key>
<string>EsyncSpace</string>
</dict>
</dict>
<key>ArgValueTypes</key>
<dict>
<key>Arg3</key>
<string>ThreadName</string>
</dict>
</dict>
<dict>
<key>Name</key>
<string>Epoch Sync Wake Thread</string>
<key>Type</key>
<string>Impulse</string>
<key>KTraceCode</key>
<string>0x12c0018</string>
<key>EventsMatchedBy</key>
<string>Thread</string>
<key>ArgNames</key>
<dict>
<key>Arg1</key>
<string>ID</string>
<key>Arg2</key>
<string>Epoch</string>
<key>Arg3</key>
<string>Thread</string>
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<key>Labels</key>
<dict>
<key>ID</key>
<dict>
<key>Value</key>
<dict>
<key>Arg</key>
<integer>1</integer>
<key>BitRange</key>
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</dict>
<key>EsyncSpace</key>
<dict>
<key>Value</key>
<dict>
<key>Arg</key>
<integer>1</integer>
<key>BitRange</key>
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<key>Format</key>
<string>EsyncSpace</string>
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<key>ArgValueTypes</key>
<dict>
<key>Arg3</key>
<string>ThreadName</string>
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