perf script timestamp

Hi guys,
I just try to use perf script, and get some thing like below:

            java 15893 [015] 96380.588871: timer_cancel: timer=0xffff8804379d6698
            java 15721 [010] 96380.588872: timer_cancel: timer=0xffff8800be3d6698
            java 15893 [015] 96380.588875: timer_expire_entry: timer=0xffff8804379d6698 function=delayed_work_timer_fn now=4391194790
            java 15721 [010] 96380.588876: timer_expire_entry: timer=0xffff8800be3d6698 function=delayed_work_timer_fn now=4391194790

I want to know exactly about the time units of the events, such as 96380.588871, and 96380.588872. The number befor "." is second or millisecond? and Is the number after "." nanoseconds or microseconds? I'm a little confused about the documation for ktime_t, please help me out!

Best,
Chen

2013-04-24

times are <seconds>.<microseconds>

David