<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><div>Hi,</div><div> </div><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></blockquote><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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></blockquote><div><br></div><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><div><br></div><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><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<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></blockquote><div><br></div><div>Yes, I set the variable via the MPICH -env option and now it worked ok for the MPI-IO requests.</div><div><br></div><div>Thanks!</div><div>Jean</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<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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</blockquote></div><br></div></div>