Re: Introduction of long term scheduling

From: M. Warner Losh <imp_at_BSDIMP.COM>
Date: Sat, 06 Jan 2007 17:18:46 -0700 (MST)

In message: <>
            Ashley Yakeley <ashley_at_SEMANTIC.ORG> writes:
: On Jan 6, 2007, at 08:35, M. Warner Losh wrote:
: > So for the foreseeable future,
: > timestamps in OSes will be a count of seconds and a fractional second
: > part. That's not going to change anytime soon even with faster
: > machines, more memory, etc. Too many transaction processing
: > applications demand maximum speed.
: That's sensible for a simple timestamp, but trying to squeeze in a
: leap-second table probably isn't such a good idea.

Unfortunately, the kernel has to have a notion of time stepping around
a leap-second if it implements ntp. There's no way around that that
isn't horribly expensive or difficult to code. The reasons for the
kernel's need to know have been enumerated elsewhere...

Received on Sat Jan 06 2007 - 16:20:17 PST

This archive was generated by hypermail 2.3.0 : Sat Sep 04 2010 - 09:44:55 PDT