This is excellent. We'll give it a try. Thank you, Amit Margalit IBM XIV - Storage Reinvented XIV-NAS Development Team Tel. 03-689-7774 Fax. 03-689-7230
From: Michel Dagenais <[email protected]> To: Amit Margalit/Israel/IBM@IBMIL Cc: [email protected] Date: 04/29/2013 04:32 AM Subject: Re: [lttng-dev] Is there a way to make LTTng use the same subbuffers for multiple processes? > Our system is a 12-core x86 (6-core + HT). If I take 4 subbuffers of 1MB, this means 4MB per > process. As the number of processes rises, this becomes prohibitive. > For example, we may need to support > 500 sub-processes ==> 500 * 4MB = 2GB - > which is a bit too much. Is there a way to tell LTTng to share the sub-buffers with forked processes? 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. http://lttng.org/lttng-tools-220-rc1 - Add UST per UID buffers support
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