<font size=2 face="sans-serif">If I understand correctly, filtering is
done at the client application side.</font>
<br>
<br><font size=2 face="sans-serif">This means that filtering could theoretically
lower the performance of the running application which has to check, for
each event, whether it should be sent to the daemon or not.</font>
<br>
<br><font size=2 face="sans-serif">Naturally, if you filter some events,
the chances of losing events due to congestion at the daemon are lower.</font>
<br>
<br><font size=2 color=#000080 face="sans-serif">Amit Margalit</font>
<br><font size=2 color=#808000 face="sans-serif">IBM XIV </font><font size=2 face="sans-serif">-
<i>Storage Reinvented</i></font>
<br><font size=2 face="sans-serif">XIV-NAS Development Team</font>
<br><font size=2 face="sans-serif">Tel. 03</font><font size=2 face="Arial">-689-7774</font>
<br><font size=2 face="Arial">Fax. 03-689-7230</font>
<br>
<br>
<br>
<br><font size=1 color=#5f5f5f face="sans-serif">From:
</font><font size=1 face="sans-serif">Ilya Mirsky <ilya.mirsky@gmail.com></font>
<br><font size=1 color=#5f5f5f face="sans-serif">To:
</font><font size=1 face="sans-serif">lttng-dev@lists.lttng.org</font>
<br><font size=1 color=#5f5f5f face="sans-serif">Date:
</font><font size=1 face="sans-serif">03/19/2014 02:47 PM</font>
<br><font size=1 color=#5f5f5f face="sans-serif">Subject:
</font><font size=1 face="sans-serif">[lttng-dev]
Performance impact using the "filter" option</font>
<br>
<hr noshade>
<br>
<br>
<br><font size=3>Hi all,</font>
<br>
<br><font size=3>It's a simple question, but I couldn't find the answer
in the documentation.</font>
<br><font size=3>Figured out I'll ask here before looking this in the code.</font>
<br>
<br><font size=3>Should I expect LTTng's overhead to be lower when filtering
some of the trace points,</font>
<br><font size=3>or is the main overhead is due to the trace point call
and not the recording itself?</font>
<br><font size=3>In practice I see no noticeable difference in performance, </font>
<br><font size=3>while I was hoping to get at least some improvement...</font>
<br>
<br><font size=3>Thanks,</font>
<br><font size=3>Ilya</font>
<br>
<br>
<br>
<br><tt><font size=2>_______________________________________________<br>
lttng-dev mailing list<br>
lttng-dev@lists.lttng.org<br>
</font></tt><a href="http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev"><tt><font size=2>http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev</font></tt></a><tt><font size=2><br>
</font></tt>
<br>