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From: Gregor Boirie <gregor.boirie@parrot.com>
To: <linux-iio@vger.kernel.org>
Subject: using monotonic clok for timstamping
Date: Wed, 3 Feb 2016 11:55:32 +0100	[thread overview]
Message-ID: <56B1DCA4.9050903@parrot.com> (raw)

Dear  all,

Our application relies on precise and monotonic timestamping of IMU 
samples (and other sensors).
I am wondering what reasons / use cases led to the choice of realtime 
clock to implement
iio_get_time_ns (not to mention time gaps that may be seen after wake up 
from sleep states).

As a dirty hack, I simply rewrote iio_get_time_ns on our platform. But I 
suspect it would be usefull as
a long term solution, to give userland the ability to choose a 
particular posix clock (realtime, monotonic,
etc...) on a per device and / or driver basis through a sysfs attribute 
for example.

I'd be glad to hear your suggestions. Best regards,
Grégor.

             reply	other threads:[~2016-02-03 11:00 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-02-03 10:55 Gregor Boirie [this message]
2016-02-03 11:22 ` Lars-Peter Clausen
2016-02-06 18:33   ` Jonathan Cameron
2016-02-08  9:55     ` Lars-Peter Clausen
2016-02-08 17:15       ` Jonathan Cameron
2016-02-09 11:06         ` Gregor Boirie
2016-02-09 14:19           ` Gregor Boirie
2016-02-09 20:49             ` Jonathan Cameron
2016-02-09 20:52           ` Lars-Peter Clausen
2016-02-09 21:02             ` Jonathan Cameron
2016-02-10  9:46             ` Gregor Boirie

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