From: compudj@krystal.dyndns.org (Mathieu Desnoyers)
Subject: [ltt-dev] lttng for nommu cpus
Date: Sun, 14 Dec 2008 17:27:45 -0500 [thread overview]
Message-ID: <20081214222745.GA26498@Krystal> (raw)
In-Reply-To: <2c918050812141120l2153f1a8oe9be5419c4ed116c@mail.gmail.com>
* andy (rootstrap at googlemail.com) wrote:
> Hi
>
> I try to investigate performance issues on a cpu (blackfin) that does
> not have mmu.
> I have ported a lttng patch, but unfortunately it does not work, as
> relayfs is not supported
> on mmu-less cpus.
> A Call to allocte buffers in relayfs lead to vmap(), which is not
> supported on mmu-less
> systems
>
> Is there any flavor of lttng that has been reported to work on mmu-less system?
> Any links?
>
The latest LTTng versions implement a ltt-relay-alloc module which is a
fork from the original relay. It does not depend on vmap'd memory at
all, so it should be fine with mmu-less cpus.
I'd be interested to merge your blackfin patches when they are ready.
Mathieu
> Thank you,
> Andy
>
> _______________________________________________
> ltt-dev mailing list
> ltt-dev at lists.casi.polymtl.ca
> http://lists.casi.polymtl.ca/cgi-bin/mailman/listinfo/ltt-dev
>
--
Mathieu Desnoyers
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68
prev parent reply other threads:[~2008-12-14 22:27 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-14 19:20 andy
2008-12-14 22:27 ` Mathieu Desnoyers [this message]
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