| Re: [tracecompass-dev] Question about VM tracing with LTTng and Virtual Machine Analysis inside TraceCompass |
[Resending, with the proper account.. Sorry!] On Tue, 2021-02-16 at 13:30 -0500, Jonathan Rajotte-Julien wrote: > On Tue, Feb 16, 2021 at 04:38:14PM +0000, tracecompass developer > discussions wrote: > > > > - In the section "LTTng-modules addons kernel module with dynamic > > tracepoints", when compiling the modules, we get the following > > errors: > > > > I see "old_lttng" in the directory hierarchy of these log. What > version > are we > talking about here? > We're using the latest available LTTng release (either from openSUSE packages or installed from sources). > > Is there a more updated version of those repositories that we can > > use, or is the process for doing a VM analysis different from what > > is > > described in those two sections of TraceCompass documentation? > > AFAIK you can use any lttng-modules > 2.9 here. > > "" > As of LTTng-modules 2.9, the net_dev_queue and net_if_receive_skb > tracepoints contain all the necessary data to synchronize the traces. > "" > Ah, ok, so does that paragraph mean that if one uses 2.9+, everything is there already? That would be cool! > Kernel tracer (LTTng-modules): > https://github.com/lttng/lttng-modules/releases/tag/v2.12.4 > > Userspace tracer (LTTng-ust): > https://github.com/lttng/lttng-ust/releases/tag/v2.12.0 > > LTTng-tools: > https://github.com/lttng/lttng-tools/releases/tag/v2.12.2 > Yep, that's exactly what we're using. If we do not need anything special for trace synchronization, this will leave us with only the "addons_vm" part to take care of: https://archive.eclipse.org/tracecompass.incubator/doc/org.eclipse.tracecompass.incubator.virtual.machine.analysis.doc.user/Virtual-Machine-Analysis-User-Documentation.html Or is that also not necessary? Thanks a lot and Regards -- Dario Faggioli, Ph.D http://about.me/dario.faggioli Virtualization Software Engineer SUSE Labs, SUSE https://www.suse.com/ ------------------------------------------------------------------- <<This happens because _I_ choose it to happen!>> (Raistlin Majere)
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