Q: caught causing excessive wakeups. Observed wakeups rate

Hi All,

Running currently El Capitan, but it is irrelevant as have seen similar behavior in the past. The problem is visible in logs as:

Sep 30 16:40:02 <hostname> kernel[0]: process ScreenSaverEngin[5355] caught causing excessive wakeups. Observed wakeups rate (per sec): 213; Maximum permitted wakeups rate (per sec): 150; Observation period: 300 seconds; Task lifetime number of wakeups: 45002

System hangs up or goes into crawling (unusable, i.e. to move mouse one has to wait for minutes).

The system hangs when task observed as causing excessive wakeups is Tuxera or anything related to disk, i.e. dd process.

I've seen multiple processes being reported as causing excessive wakeups and it is reported in similar way as below.

Interestingly even ScreenSaver (stock from Apple) causes the same.

The question is how to disable this "feature" as it seems like it puts that process into semi sleep mode where process doesn't get almost at all of CPU time.

Sep 30 16:40:02 <hostname> kernel[0]: process ScreenSaverEngin[5355] caught causing excessive wakeups. Observed wakeups rate (per sec): 213; Maximum permitted wakeups rate (per sec): 150; Observation period: 300 seconds; Task lifetime number of wakeups: 45002

Sep 30 16:40:02 <hostname> com.apple.xpc.launchd[1] (com.apple.ReportCrash[5360]): Endpoint has been activated through legacy launch(3) APIs. Please switch to XPC or bootstrap_check_in(): com.apple.ReportCrash

Sep 30 16:40:02 <hostname> ReportCrash[5360]: Invoking spindump for pid=5355 wakeups_rate=213 duration=212 because of excessive wakeups

And many more of others in same way.

Sep 30 21:04:36 <hostname> kernel[0]: process VirtualBoxVM[5099] caught causing excessive wakeups. Observed wakeups rate (per sec): 948; Maximum permitted wakeups rate (per sec): 150; Observation period: 300 seconds; Task lifetime number of wakeups: 26005280

Sep 30 21:04:36 <hostname> com.apple.xpc.launchd[1] (com.apple.ReportCrash.Root[5562]): Endpoint has been activated through legacy launch(3) APIs. Please switch to XPC or bootstrap_check_in(): com.apple.ReportCrash.DirectoryService

Sep 30 21:04:36 <hostname> ReportCrash[5562]: Invoking spindump for pid=5099 wakeups_rate=948 duration=48 because of excessive wakeups

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There is no problem with memory, disk space or anything else, it's MacBook Pro mid 2015.

Thank you in advance.

Sep 30 21:11:21 <hostname> kernel[0]: process VirtualBoxVM[5099] caught causing excessive wakeups. Observed wakeups rate (per sec): 1065; Maximum permitted wakeups rate (per sec): 150; Observation period: 300 seconds; Task lifetime number of wakeups: 26396448

Sep 30 21:11:21 <hostname> com.apple.xpc.launchd[1] (com.apple.ReportCrash.Root[5615]): Endpoint has been activated through legacy launch(3) APIs. Please switch to XPC or bootstrap_check_in(): com.apple.ReportCrash.DirectoryService

Sep 30 21:11:21 <hostname> ReportCrash[5615]: Invoking spindump for pid=5099 wakeups_rate=1065 duration=43 because of excessive wakeups

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Sep 30 21:40:30 <hostname> kernel[0]: process VirtualBoxVM[5099] caught causing excessive wakeups. Observed wakeups rate (per sec): 953; Maximum permitted wakeups rate (per sec): 150; Observation period: 300 seconds; Task lifetime number of wakeups: 28059390

Sep 30 21:40:30 <hostname> com.apple.xpc.launchd[1] (com.apple.ReportCrash.Root[5648]): Endpoint has been activated through legacy launch(3) APIs. Please switch to XPC or bootstrap_check_in(): com.apple.ReportCrash.DirectoryService

Sep 30 21:40:30 <hostname> ReportCrash[5648]: Invoking spindump for pid=5099 wakeups_rate=953 duration=48 because of excessive wakeups

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Sep 30 22:49:25 <hostname> kernel[0]: process VirtualBoxVM[5099] caught causing excessive wakeups. Observed wakeups rate (per sec): 944; Maximum permitted wakeups rate (per sec): 150; Observation period: 300 seconds; Task lifetime number of wakeups: 32037993

Sep 30 22:49:25 <hostname> com.apple.xpc.launchd[1] (com.apple.ReportCrash.Root[5664]): Endpoint has been activated through legacy launch(3) APIs. Please switch to XPC or bootstrap_check_in(): com.apple.ReportCrash.DirectoryService

Sep 30 22:49:25 <hostname> ReportCrash[5664]: Invoking spindump for pid=5099 wakeups_rate=944 duration=48 because of excessive wakeups