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<div class="moz-cite-prefix">On 02/14/2017 03:18 PM, Jean Bez wrote:<br>
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<div>Hi,</div>
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<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">Are you
actually performing any read or write operations to a file
in<br>
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the application you are linking with Darshan? DXT only
traces reads and<br>
writes, so if you are just opening a file (for instance),
it shouldn't<br>
produce any DXT data.<br>
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<div>Yes, but after looking at the application I was testing
it used some functions (fwrite for instance) that were not
traced by Darshan DxT, although they appeared on the
default Darshan report. So I looked at the souce-code and
those calls is not handled yet.</div>
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Hi Jean,<br>
<br>
Is this a feature that you would be interested in? If so, you can
add a feature request on gitlab
<a class="moz-txt-link-freetext" href="https://xgitlab.cels.anl.gov/darshan/darshan/issues">https://xgitlab.cels.anl.gov/darshan/darshan/issues</a> (you will
probably need to sign up for an account first) to have the dxt
module include stdio functions, to make sure we don't lose track of
the idea.<br>
<br>
thanks,<br>
-Phil<br>
<br>
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cite="mid:CANFsQ5XM-sakdJvSST3erQxe0=nuM5Ox1MR4fg-obUYX3Aq3FQ@mail.gmail.com"
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<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">If your
application is doing reads/writes, there should be DXT
data if<br>
you enabled it properly. Did you run 'export
DXT_ENABLE_IO_TRACE='? Note<br>
that you need to include the trailing equal sign, even if
you aren't<br>
setting a value for the amount of memory to use. For
example: </blockquote>
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<br>
'export DXT_ENABLE_IO_TRACE=' will give you the default
4MiB buffer per<br>
process for tracing<br>
'export DXT_ENABLE_IO_TRACE=8' will instead allocate 8MiB
buffers per<br>
process<br>
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<div>Yes, I set the variable via the MPICH -env option and
now it worked ok for the MPI-IO requests.</div>
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<div>Thanks!</div>
<div>Jean</div>
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<br>
Thanks,<br>
--Shane<br>
<br>
On 02/13/2017 11:03 AM, Jean Bez wrote:<br>
> Hi!<br>
><br>
> I was just trying to use the new DXT module and
although I have set<br>
> the environment variable (DXT_ENABLE_IO_TRACE) to
activate it, when I<br>
> attempt to parse the .darshan file with the
darshan-dxt-parser I<br>
> always get the message:<br>
><br>
> "no DXT module data available for this Darshan log."<br>
><br>
> Is there something else we need to do to enable DXT?<br>
><br>
> Thanks!<br>
><br>
> Best regards,<br>
> Jean<br>
><br>
><br>
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