Messages in this thread | | | Date | Thu, 20 Oct 2005 12:09:42 -0400 (EDT) | From | Steven Rostedt <> | Subject | Re: Ktimer / -rt9 (+custom) monotonic_clock going backwards. |
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On Thu, 20 Oct 2005, Ingo Molnar wrote: > > * Steven Rostedt <rostedt@goodmis.org> wrote: > > > > I just switched cycle_t to u64 and hackbench no longer makes the time go > > > backwards. > > > > > > John, would this cause any problems to keep cycle_t at s64? > > > > I mean at u64. > > ugh. There's both cycles_t and cycle_t. We should unify the two and it > should be 64-bit. The faster systems get, the sooner the 32-bit counter > overflows. 64-bit systems are keeping 32-bit compatibility for quite > some time to come. So with an 8GHz CPU the 32-bit cycle_t would wrap in > like 500 msecs, way too fast to rely on ... (even with a 4GHz CPUs it's > only one second.) > > i've made cycle_t u64 and have uploaded -rt14. >
Ingo,
I'm disappointed in you, I expected you to upload 2.6.14-rc5-rt1
;-)
-- Steve
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