21 lines
844 B
Plaintext
21 lines
844 B
Plaintext
Demonstrations of naptime, the Linux bpftrace/eBPF version.
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Tracing application sleeps via the nanosleep(2) syscall:
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# ./naptime.bt
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Attaching 2 probes...
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Tracing sleeps. Hit Ctrl-C to end.
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TIME PCOMM PPID COMM PID SECONDS
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15:50:00 1 systemd 1319 mysqld 1.000
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15:50:01 4388 bash 25250 sleep 5.000
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15:50:01 1 systemd 1319 mysqld 1.000
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15:50:01 1 systemd 1180 cron 60.000
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15:50:01 1 systemd 1180 cron 60.000
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15:50:02 1 systemd 1319 mysqld 1.000
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[...]
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The output shows mysqld performing a one second sleep every second (likely
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a daemon thread), a sleep(1) command sleeping for five seconds and called
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by bash, and cron threads sleeping for 60 seconds.
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