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<div class="moz-cite-prefix">On 15/04/2020 14:29, Utkarsh Rai wrote:<br>
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<blockquote type="cite"
cite="mid:CACR9YrCJdUQWhmJ1-ftRkYKuomnpP2vt-HsyLyt9REzX2SrU8g@mail.gmail.com">
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<div dir="ltr" class="gmail_attr">On Wed, Apr 15, 2020 at 5:35
PM Sebastian Huber <<a
href="mailto:sebastian.huber@embedded-brains.de"
target="_blank" moz-do-not-send="true">sebastian.huber@embedded-brains.de</a>>
wrote:<br>
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0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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<p>On 15/04/2020 14:02, Utkarsh Rai wrote:<br>
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<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">> + status =
clock_gettime( CLOCK_MONOTONIC, &end_time );<br>
> + rtems_test_assert( status == 0 );<br>
> +<br>
> + rtems_test_assert(
(end_time.tv_sec-init_time.tv_sec) == 0 );<br>
<br>
Is end_time.tv_sec - init_time.tv_sec == 0 under all
circumstances?<br>
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<div>My idea was to check for a 1ns delay with a
reasonable amount of overhead, hence I checked
for end_time.tv_sec - init_time.tv_sec == 0.</div>
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Exists there a value of init_time for which end_time.tv_sec
!= init_time.tv_sec and still 1ns elapsed?<br>
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<div>Sorry, maybe I am confused in my concept, kidly help me
out. I want to produce a 1ns delay, so I make a call to
clock_nanosleep with flag value as 0 (to sleep for specified
time) and the delay being 1ns. I recorded the time before the
sleep call and after the sleep call. Now, I want to check if
the delay produced was actually 1ns with a reasonable
overhead, my assumption for an unreasonable overhead was that
if I specify a delay of 1ns </div>
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Up to here everything is fine.<br>
<blockquote type="cite"
cite="mid:CACR9YrCJdUQWhmJ1-ftRkYKuomnpP2vt-HsyLyt9REzX2SrU8g@mail.gmail.com">
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<div>and I get a delay in seconds, it would be an error. <br>
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Think about this once more.<br>
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