> 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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