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Re: User-space tracing on ARM
- From: fche at redhat dot com (Frank Ch. Eigler)
- To: "Turgis, Frederic" <f-turgis at ti dot com>
- Cc: "systemtap at sourceware dot org" <systemtap at sourceware dot org>
- Date: Wed, 20 Apr 2011 10:47:36 -0400
- Subject: Re: User-space tracing on ARM
- References: <13872098A06B02418CF379A158C0F146016133AA5B@dnce02.ent.ti.com>
Hi, Fred -
> [...] Is anyone probing user-space on ARM with systemtap ? I asked
> the question in the context of Linaro organization and I did not get
> anwers :-(
Due to the unfortunate lack of a utrace | uprobes port for ARM,
systemtap's support for userspace on your platform is still very
limited.
The medium-term way forward would appear to be porting the proposed
ibm uprobes lkml patches to ARM, and waiting/helping till systemtap is
able to make use of those.
> - how does systemtap compare to other tools for user-space ?
> [...]
For joint kernel+userspace dynamic+static tracing+probing, systemtap
has been the only available alternative. For different subsets of
functionality, with different performance/portability tradeoffs, the
other tools may suit well. Perhaps we should add a few more
rows/columns to the (increasingly misnamed) comparison page [1].
[1] http://sourceware.org/systemtap/wiki/SystemtapDtraceComparison
- FChE