Hi! Yesterday evening, Julien and I were actively finishing the vDSO work that is needed to have synchronized timestamps between the kernel LTTng and UST on x86. It should be ready very soon. Keep posted for a new release. :)
By the way, in the initial implementation, only 64-bit processes on 64-bit x86 systems with synchronized TSCs will benefit from the vDSO speed. All other x86 setups will fallback on a system call, which will still work, albeit being a bit slower. Thanks, Mathieu * Alexandre Montplaisir ([email protected]) wrote: > Hi folks, > > I've received this bug report about kernel/UST trace synchronization. > Anyone knows what's the status on this? > > Thanks, > Alexandre > > > On 10-11-26 03:24 AM, Florent Boudet wrote: >> Hello, >> >> I am sorry to contact you directly instead of filling a bug, but it >> seems the option is disabled on the launchpad project... >> >> I have recorded userspace traces at the same time as kernel traces, and >> opened both with LTTv. >> Timestamp for userspace traces and timestamp for kernel traces have >> different origins, which make it difficult to analyze. >> I am not sure about the cause, this might be related to a GMT/localtime >> issue... >> >> Regards, >> Florent Boudet > > > _______________________________________________ > ltt-dev mailing list > [email protected] > http://lists.casi.polymtl.ca/cgi-bin/mailman/listinfo/ltt-dev > -- Mathieu Desnoyers Operating System Efficiency R&D Consultant EfficiOS Inc. http://www.efficios.com _______________________________________________ ltt-dev mailing list [email protected] http://lists.casi.polymtl.ca/cgi-bin/mailman/listinfo/ltt-dev
