Sampling process 538 for 3 seconds with 1 millisecond of run time between samples Sampling completed, processing symbols... Analysis of sampling cfprefsd (pid 538) every 1 millisecond Process: cfprefsd [538] Path: /usr/sbin/cfprefsd Load Address: 0x10506e000 Identifier: cfprefsd Version: 1451 Code Type: X86-64 Parent Process: launchd [1] Date/Time: 2018-02-08 13:06:20.819 -0800 Launch Time: 2018-02-07 20:55:28.148 -0800 OS Version: Mac OS X 10.13.3 (17D47) Report Version: 7 Analysis Tool: /usr/bin/sample ---- Call graph: 2728 Thread_4524 DispatchQueue_11: com.apple.root.default-qos.overcommit (concurrent) + 2728 _dispatch_sig_thread (in libdispatch.dylib) + 53 [0x7fff7e94cc58] + 2728 _dispatch_sigsuspend (in libdispatch.dylib) + 21 [0x7fff7e94cc6d] + 2728 __sigsuspend_nocancel (in libsystem_kernel.dylib) + 10 [0x7fff7eaca2fa] 2728 Thread_576925 + 2728 start_wqthread (in libsystem_pthread.dylib) + 13 [0x7fff7ec04c4d] + 2728 _pthread_wqthread (in libsystem_pthread.dylib) + 1035 [0x7fff7ec0506a] + 2728 __workq_kernreturn (in libsystem_kernel.dylib) + 10 [0x7fff7eaca562] 2728 Thread_577231 2728 start_wqthread (in libsystem_pthread.dylib) + 13 [0x7fff7ec04c4d] 2728 _pthread_wqthread (in libsystem_pthread.dylib) + 1035 [0x7fff7ec0506a] 2728 __workq_kernreturn (in libsystem_kernel.dylib) + 10 [0x7fff7eaca562] Total number in stack (recursive counted multiple, when >=5): Sort by top of stack, same collapsed (when >= 5): __workq_kernreturn (in libsystem_kernel.dylib) 5456 __sigsuspend_nocancel (in libsystem_kernel.dylib) 2728 Binary Images: 0x10506e000 - 0x10506eff7 +cfprefsd (1451) /usr/sbin/cfprefsd 0x10c4fb000 - 0x10c54598f dyld (519.2.2) <6695F30B-4E88-3C0B-9867-7D738C44A3E6> /usr/lib/dyld 0x7fff56f43000 - 0x7fff573dcfff com.apple.CoreFoundation (6.9 - 1451) <739D6558-3DF3-3181-AA07-BBE3882D3B7F> /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation 0x7fff7c1e4000 - 0x7fff7c217fff libclosured.dylib (519.2.2) <48051216-5647-3643-B979-B77D0FD20011> /usr/lib/closure/libclosured.dylib 0x7fff7c38e000 - 0x7fff7c38fff3 libDiagnosticMessagesClient.dylib (104) <9712E980-76EE-3A89-AEA6-DF4BAF5C0574> /usr/lib/libDiagnosticMessagesClient.dylib 0x7fff7c6f6000 - 0x7fff7c6f7ff3 libSystem.B.dylib (1252) <47329E26-DC23-3EBA-9461-37755368327D> /usr/lib/libSystem.B.dylib 0x7fff7c9ac000 - 0x7fff7ca02fff libc++.1.dylib (400.9) /usr/lib/libc++.1.dylib 0x7fff7ca03000 - 0x7fff7ca27ff7 libc++abi.dylib (400.7) <217656D5-BC40-37FF-B322-91CB2AAD4F34> /usr/lib/libc++abi.dylib 0x7fff7d4d5000 - 0x7fff7d6fcffb libicucore.A.dylib (59152.0.1) /usr/lib/libicucore.A.dylib 0x7fff7dd79000 - 0x7fff7e16a3b7 libobjc.A.dylib (723) <37A7D77E-952C-3F5D-970B-3CDE349B2322> /usr/lib/libobjc.A.dylib 0x7fff7e761000 - 0x7fff7e773ffb libz.1.dylib (70) <48C67CFC-940D-3857-8DAD-857774605352> /usr/lib/libz.1.dylib 0x7fff7e811000 - 0x7fff7e815ff7 libcache.dylib (80) <354F3B7D-404E-3398-9EBF-65CA2CE65211> /usr/lib/system/libcache.dylib 0x7fff7e816000 - 0x7fff7e820ff3 libcommonCrypto.dylib (60118.30.2) <674286D3-7744-36A3-9AAA-49DFCD97A986> /usr/lib/system/libcommonCrypto.dylib 0x7fff7e821000 - 0x7fff7e828fff libcompiler_rt.dylib (62) <4487CFBA-A5D7-3282-9E6B-94CAD7BE507E> /usr/lib/system/libcompiler_rt.dylib 0x7fff7e829000 - 0x7fff7e831ffb libcopyfile.dylib (146.30.2) <2C7C67D7-562B-3FFA-973D-BACF4C10E1EC> /usr/lib/system/libcopyfile.dylib 0x7fff7e832000 - 0x7fff7e8b7fff libcorecrypto.dylib (562.30.10) <8A53EFE1-AFCA-3676-BEE1-FA5ED9F0E222> /usr/lib/system/libcorecrypto.dylib 0x7fff7e93f000 - 0x7fff7e978ff7 libdispatch.dylib (913.30.4) <7D0E3183-282B-3FEE-A734-2C0ADC092084> /usr/lib/system/libdispatch.dylib 0x7fff7e979000 - 0x7fff7e996ff7 libdyld.dylib (519.2.2) /usr/lib/system/libdyld.dylib 0x7fff7e997000 - 0x7fff7e997ffb libkeymgr.dylib (28) <6D84A96F-C65B-38EC-BDB5-21FD2C97E7B2> /usr/lib/system/libkeymgr.dylib 0x7fff7e9a5000 - 0x7fff7e9a5ff7 liblaunch.dylib (1205.30.29) /usr/lib/system/liblaunch.dylib 0x7fff7e9a6000 - 0x7fff7e9aaffb libmacho.dylib (900.0.1) <756F2553-07B6-3B42-ACEA-2F0F1A5E8D0F> /usr/lib/system/libmacho.dylib 0x7fff7e9ab000 - 0x7fff7e9adff3 libquarantine.dylib (86) <6AC8773F-3817-3D82-99C2-01BABB9C3CBB> /usr/lib/system/libquarantine.dylib 0x7fff7e9ae000 - 0x7fff7e9afff3 libremovefile.dylib (45) <912FA211-DD8C-3C92-8424-21B89F8B10FD> /usr/lib/system/libremovefile.dylib 0x7fff7e9b0000 - 0x7fff7e9c7fff libsystem_asl.dylib (356.1.1) <94972913-9DF0-3C78-847C-43E58919E3DA> /usr/lib/system/libsystem_asl.dylib 0x7fff7e9c8000 - 0x7fff7e9c8fff libsystem_blocks.dylib (67) /usr/lib/system/libsystem_blocks.dylib 0x7fff7e9c9000 - 0x7fff7ea52ff7 libsystem_c.dylib (1244.30.3) /usr/lib/system/libsystem_c.dylib 0x7fff7ea53000 - 0x7fff7ea56ffb libsystem_configuration.dylib (963.30.1) <0F8D0B76-4F7D-34EC-AB6C-50F9465809DA> /usr/lib/system/libsystem_configuration.dylib 0x7fff7ea57000 - 0x7fff7ea5affb libsystem_coreservices.dylib (51) <21A488D0-2D07-344E-8631-CC8B2A246F35> /usr/lib/system/libsystem_coreservices.dylib 0x7fff7ea5b000 - 0x7fff7ea5cfff libsystem_darwin.dylib (1244.30.3) <2F750CB1-BC26-3FA3-AE59-553EE30D451B> /usr/lib/system/libsystem_darwin.dylib 0x7fff7ea5d000 - 0x7fff7ea63ff7 libsystem_dnssd.dylib (878.30.4) /usr/lib/system/libsystem_dnssd.dylib 0x7fff7ea64000 - 0x7fff7eaadff7 libsystem_info.dylib (517.30.1) <7D79E167-4B5C-3833-81EE-3AF3FB53616D> /usr/lib/system/libsystem_info.dylib 0x7fff7eaae000 - 0x7fff7ead3ff7 libsystem_kernel.dylib (4570.41.2) <5155A4C3-825B-3178-AC51-0D2D2F2A6618> /usr/lib/system/libsystem_kernel.dylib 0x7fff7ead4000 - 0x7fff7eb1ffcb libsystem_m.dylib (3146) /usr/lib/system/libsystem_m.dylib 0x7fff7eb20000 - 0x7fff7eb3ffff libsystem_malloc.dylib (140.40.1) <36B22C99-D772-3039-9A4C-AA31389965E1> /usr/lib/system/libsystem_malloc.dylib 0x7fff7eb40000 - 0x7fff7ebe4ff3 libsystem_network.dylib (1229.30.11) <40BAD301-8744-3AD8-A688-E7925C587B00> /usr/lib/system/libsystem_network.dylib 0x7fff7ebe5000 - 0x7fff7ebefffb libsystem_networkextension.dylib (767.40.1) /usr/lib/system/libsystem_networkextension.dylib 0x7fff7ebf0000 - 0x7fff7ebf9ff3 libsystem_notify.dylib (172) <98EA3D62-7C86-30DE-8261-D020D2F1EFF3> /usr/lib/system/libsystem_notify.dylib 0x7fff7ebfa000 - 0x7fff7ec01ff7 libsystem_platform.dylib (161.20.1) /usr/lib/system/libsystem_platform.dylib 0x7fff7ec02000 - 0x7fff7ec0dfff libsystem_pthread.dylib (301.30.1) /usr/lib/system/libsystem_pthread.dylib 0x7fff7ec0e000 - 0x7fff7ec11ff3 libsystem_sandbox.dylib (765.40.2) <922D3D15-AB4C-3F1A-A94F-39214AF1ADB3> /usr/lib/system/libsystem_sandbox.dylib 0x7fff7ec12000 - 0x7fff7ec13ff3 libsystem_secinit.dylib (30) /usr/lib/system/libsystem_secinit.dylib 0x7fff7ec14000 - 0x7fff7ec1bff7 libsystem_symptoms.dylib (820.30.7) /usr/lib/system/libsystem_symptoms.dylib 0x7fff7ec1c000 - 0x7fff7ec2fff7 libsystem_trace.dylib (829.30.14) <69EBF017-D40F-30D7-9B0B-BFC862D761A5> /usr/lib/system/libsystem_trace.dylib 0x7fff7ec31000 - 0x7fff7ec36ff7 libunwind.dylib (35.3) <6D4FCD49-D2A9-3233-95C7-A7635CE265F2> /usr/lib/system/libunwind.dylib 0x7fff7ec37000 - 0x7fff7ec63ff7 libxpc.dylib (1205.30.29) /usr/lib/system/libxpc.dylib Sample analysis of process 538 written to file /dev/stdout