* [ltt-dev] gettimeofday vs clock_gettime
@ 2010-05-21 7:26 Nils Carlson
2010-05-21 12:19 ` Mathieu Desnoyers
2010-05-21 15:52 ` Pierre-Marc Fournier
0 siblings, 2 replies; 3+ messages in thread
From: Nils Carlson @ 2010-05-21 7:26 UTC (permalink / raw)
Is there any reason UST uses gettimeofday and not clock_gettime with the
monotonic clock?
I'm guessing this has been asked before, but the mailing list doesn't
really lend itself to searching and there is no FAQ as far as I can tell.
/Nils
^ permalink raw reply [flat|nested] 3+ messages in thread
* [ltt-dev] gettimeofday vs clock_gettime
2010-05-21 7:26 [ltt-dev] gettimeofday vs clock_gettime Nils Carlson
@ 2010-05-21 12:19 ` Mathieu Desnoyers
2010-05-21 15:52 ` Pierre-Marc Fournier
1 sibling, 0 replies; 3+ messages in thread
From: Mathieu Desnoyers @ 2010-05-21 12:19 UTC (permalink / raw)
* Nils Carlson (nils.carlson at ludd.ltu.se) wrote:
> Is there any reason UST uses gettimeofday and not clock_gettime with the
> monotonic clock?
Given that clock_gettime is available as a vDSO too, I see no reason not
to use it instead of gettimeofday. It's clearly closer to the intent.
Eventually, we'd like to create a TRACE_CLOCK version of clock_gettime
that would return the same time base as LTTng.
Thanks,
Mathieu
>
> I'm guessing this has been asked before, but the mailing list doesn't
> really lend itself to searching and there is no FAQ as far as I can tell.
>
> /Nils
>
>
>
> _______________________________________________
> ltt-dev mailing list
> ltt-dev at lists.casi.polymtl.ca
> http://lists.casi.polymtl.ca/cgi-bin/mailman/listinfo/ltt-dev
>
--
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com
^ permalink raw reply [flat|nested] 3+ messages in thread
* [ltt-dev] gettimeofday vs clock_gettime
2010-05-21 7:26 [ltt-dev] gettimeofday vs clock_gettime Nils Carlson
2010-05-21 12:19 ` Mathieu Desnoyers
@ 2010-05-21 15:52 ` Pierre-Marc Fournier
1 sibling, 0 replies; 3+ messages in thread
From: Pierre-Marc Fournier @ 2010-05-21 15:52 UTC (permalink / raw)
Nils Carlson wrote:
> Is there any reason UST uses gettimeofday and not clock_gettime with the
> monotonic clock?
The only reason is braindeadness. ;-) Can you provide a patch to fix this?
pmf
^ permalink raw reply [flat|nested] 3+ messages in thread
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2010-05-21 7:26 [ltt-dev] gettimeofday vs clock_gettime Nils Carlson
2010-05-21 12:19 ` Mathieu Desnoyers
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