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From: Sean Nyekjaer <sean@geanix.com>
To: Lorenzo Bianconi <lorenzo@kernel.org>
Cc: linux-iio <linux-iio@vger.kernel.org>,
	Jonathan Cameron <Jonathan.Cameron@huawei.com>
Subject: Re: IIO timestamp get skewed when suspending (st_lsm6dsx)
Date: Wed, 3 Jun 2020 12:37:59 +0200	[thread overview]
Message-ID: <d3288925-0891-8c72-b0e7-2b71ff50e1d3@geanix.com> (raw)
In-Reply-To: <20200603102841.GC544784@lore-desk.lan>

>>
>> Hmm, suspend again for 15s.
>>
>> https://gist.github.com/sknsean/911ae4ae2e74ebe1e7eca1405c645ff1
>>
>> [  105.520634] PM: suspend exit
>> [  105.540206] ts_ref 1591097307780181385, ts 2861700000, sample_time
>> 1591097310641881385
>>
>> [  105.548416] ktime_get_real_ns: 1591097322928175385
>>
>> CLOCK_REALTIME isn't ready in the resume function. I think we need to link
>> it to CLOCK_BOOTTIME (Which ticking under suspend) instead.
> 
> With latest patch it seems to me the time reported is now monotonic so it seems
> correct. What is the clocktype you set? you can check it in:
> /sys/bus/iio/devices/iio:device<x>/current_timestamp_clock

default: realtime

In the dump above the ktime_get_real_ns(first fifo dump after suspend) - 
  ts_ref + ts is = 12,286294 sec...

/Sean

  reply	other threads:[~2020-06-03 10:38 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-28 18:01 IIO timestamp get skewed when suspending (st_lsm6dsx) Sean Nyekjaer
2020-05-28 21:07 ` Lorenzo Bianconi
2020-05-29  7:32   ` Sean Nyekjaer
2020-05-29  7:44     ` Lorenzo Bianconi
2020-05-29  8:33       ` Sean Nyekjaer
2020-05-29  8:50         ` Lorenzo Bianconi
2020-05-29 11:19           ` Sean Nyekjaer
2020-05-29 12:16             ` Lorenzo Bianconi
2020-05-29 12:29               ` Sean Nyekjaer
2020-06-02 11:48               ` Sean Nyekjaer
2020-06-02 13:39                 ` Sean Nyekjaer
2020-06-02 18:02                   ` Sean Nyekjaer
2020-06-03  8:06                     ` Lorenzo Bianconi
2020-06-03 10:05                       ` Sean Nyekjaer
2020-06-03 10:28                         ` Lorenzo Bianconi
2020-06-03 10:37                           ` Sean Nyekjaer [this message]
2020-06-03 10:51                             ` Lorenzo Bianconi
2020-06-03 11:29                               ` Sean Nyekjaer
2020-06-03 12:12                                 ` Lorenzo Bianconi
2020-06-03 12:49                                   ` Sean Nyekjaer
2020-06-03 12:56                                     ` Lorenzo Bianconi
2020-06-03 13:15                                       ` Sean Nyekjaer
2020-06-03 13:40                                         ` Lorenzo Bianconi
2020-06-03 14:10                                           ` Sean Nyekjaer
2020-06-08 12:20                                             ` Sean Nyekjaer
2020-06-08 14:09                                               ` Thomas Gleixner
2020-07-10 12:10   ` Sean Nyekjaer
2020-07-10 13:20     ` Lorenzo Bianconi

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