Messages in this thread | | | Date | Fri, 24 Nov 2006 16:48:31 -0500 | From | Mathieu Desnoyers <> | Subject | [PATCH] LTTng 0.6.36 for 2.6.18 (now with markers) |
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Hi,
I have, since a few weeks, moved LTTng to the markers infrastructure. I left the ltt-dev users and contributors test the markers and LTTng on various architectures (i386, x86_64, PowerPC, -ppc, ARM, MIPS) before posting it on LKML.
The most important new features since the my post :
- Use DebugFS - Use the "Markers" infrastructure (updated since the last post on LKML). - Dynamically loadable "probes" that connects to the markers. - CPU Hotplug support (this piece seemed necessary for the Xen port I am currently working on) - Use of per-CPU atomic operations even on SMP machines (no lock prefix, no memory barriers) to update the per-cpu counters. An explicit smp_wmb() is used at the one place where the subbuffers are tagged "full" and smp_rmb() is used in the buffer consumer just after it reads this counter indicating that the subbuffer is full.
I am not submitting the probes themselves, as they can be provided as separate kernel modules.
Comments and constructive criticism are, as always, welcome.
The patches follow.
Mathieu
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