[lkml]   [2009]   [Aug]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [PATCH 0/3] Add walltime support for ring-buffer
    > * KOSAKI Motohiro <> wrote:
    > > It can. but I don't think it is sufficient. On flight recorder
    > > use-case, The tracing run more than one year. And, Administrator
    > > only see last N sec log. (previous logs were overwritten by
    > > ring-buffer go-around)
    > That's definitely something we want to enable ASAP.
    > I'm wondering why a single u64 timestamp is not enough to express
    > the full, absolute range of time elapsed since bootup, in
    > nanoseconds.
    > That would make walltime a matter of pretty-printing only - we'd
    > have to convert the u64 nsec timestamp into a walltime format,
    > right?
    > In fact we could change all the timestamps to be standardized along
    > 'nanoseconds elapsed since 1970' or so - not nanoseconds since the
    > last bootup. That still fits just fine within 64 bits - u64
    > nanoseconds has a scope of 500+ years.

    Ah, you are right. thanks correct me.
    but I think ntp updating time storing is necessary too.

     \ /
      Last update: 2009-08-03 11:35    [W:0.020 / U:12.788 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site