* [PATCH] LTTng 0.6.36 for 2.6.18 (now with markers)
@ 2006-11-24 22:06 Mathieu Desnoyers
2006-11-27 16:57 ` Christoph Hellwig
0 siblings, 1 reply; 2+ messages in thread
From: Mathieu Desnoyers @ 2006-11-24 22:06 UTC (permalink / raw)
To: linux-kernel, Christoph Hellwig, Andrew Morton, Ingo Molnar,
Greg Kroah-Hartman, Thomas Gleixner, Tom Zanussi, Karim Yaghmour,
Paul Mundt, Jes Sorensen, Richard J Moore, Martin J. Bligh,
Michel Dagenais, Douglas Niehaus, ltt-dev, systemtap
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
OpenPGP public key: http://krystal.dyndns.org:8080/key/compudj.gpg
Key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH] LTTng 0.6.36 for 2.6.18 (now with markers)
2006-11-24 22:06 [PATCH] LTTng 0.6.36 for 2.6.18 (now with markers) Mathieu Desnoyers
@ 2006-11-27 16:57 ` Christoph Hellwig
0 siblings, 0 replies; 2+ messages in thread
From: Christoph Hellwig @ 2006-11-27 16:57 UTC (permalink / raw)
To: Mathieu Desnoyers
Cc: linux-kernel, Christoph Hellwig, Andrew Morton, Ingo Molnar,
Greg Kroah-Hartman, Thomas Gleixner, Tom Zanussi, Karim Yaghmour,
Paul Mundt, Jes Sorensen, Richard J Moore, Martin J. Bligh,
Michel Dagenais, Douglas Niehaus, ltt-dev, systemtap
You're mail suject lines are really bad, they make it totally impossible
to figure out what each patch is about on the mail view folder.
IT should be simply:
Subject: [PATCH n/m] lttng: description
^ permalink raw reply [flat|nested] 2+ messages in thread
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2006-11-24 22:06 [PATCH] LTTng 0.6.36 for 2.6.18 (now with markers) Mathieu Desnoyers
2006-11-27 16:57 ` Christoph Hellwig
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