<font size=2 face="sans-serif">This is excellent. We'll give it a try.
Thank you,</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">Michel Dagenais <michel.dagenais@polymtl.ca></font>
<br><font size=1 color=#5f5f5f face="sans-serif">To:
</font><font size=1 face="sans-serif">Amit Margalit/Israel/IBM@IBMIL</font>
<br><font size=1 color=#5f5f5f face="sans-serif">Cc:
</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">04/29/2013 04:32 AM</font>
<br><font size=1 color=#5f5f5f face="sans-serif">Subject:
</font><font size=1 face="sans-serif">Re: [lttng-dev]
Is there a way to make LTTng use the same subbuffers for multiple processes?</font>
<br>
<hr noshade>
<br>
<br>
<br><font size=3><br>
> </font><font size=2 face="sans-serif">Our system is a 12-core x86
(6-core + HT). If I take 4 subbuffers of 1MB, this means 4MB per<br>
> process. As the number of processes rises, this becomes prohibitive.</font><font size=3>
<br>
> </font><font size=2 face="sans-serif">For example, we may need to
support > 500 sub-processes ==> 500 * 4MB = 2GB - <br>
> which is a bit too much.</font><font size=3> </font><font size=2 face="sans-serif">Is
there a way to tell LTTng to share the sub-buffers with forked processes?</font><font size=3>
<br>
<br>
This is the number one feature listed in the changelog for lttng-tools
and UST for version 2.2. The first release candidate is out so you can
try the feature, and the final 2.2 version should not be too far away.<br>
<br>
</font><a href="http://lttng.org/lttng-tools-220-rc1"><font size=3>http://lttng.org/lttng-tools-220-rc1</font></a><font size=3><br>
- Add UST per UID buffers support<br>
</font>
<br>