Re: [PATCH 0/11] LTTng-core (basic tracing infrastructure) 0.5.108




Paul Mundt wrote:
subjective, LTT proved that this was a problem regarding general
code-level intrusiveness when the number of tracepoints in relatively
close locality started piling up based on what people considered
arbitrarily useful, and LTTng doesn't appear to do anything to address
this.

"LTT proved that ..." what are you talking about? Have you noticed
the posting earlier regarding the fact that the ltt tracepoints did
not change over a 5 year span? **five** years ... Where do you get
this claim that ltt trace points "started piling up"? Have a look
at figure 2 of this article and let me know exactly which of those
tracepoints are actually a problem to you:
http://www.usenix.org/events/usenix2000/general/full_papers/yaghmour/yaghmour_html/index.html

Karim
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/



Relevant Pages

  • Re: [PATCH 0/11] LTTng-core (basic tracing infrastructure) 0.5.108
    ... code-level intrusiveness when the number of tracepoints in relatively ... close locality started piling up based on what people considered ... and LTTng doesn't appear to do anything to address ... "LTT proved that ..." ...
    (Linux-Kernel)
  • Re: [patch 4/4] KVM-trace port to tracepoints
    ... Currently what I have in LTTng includes this output channel. ... Tracepoints in kernel code to instrument the kernel. ... format the data so it's meaningful to userspace (e.g. extracts the pid ... - The LTTng serializer is connected on those markers. ...
    (Linux-Kernel)
  • Re: [PATCH 0/11] LTTng-core (basic tracing infrastructure) 0.5.108
    ... is in any way going to put your LTT project in a better light? ... tracepoints grow significantly. ... are running on precompiled vendor kernels. ...
    (Linux-Kernel)
  • Re: [PATCH 0/11] LTTng-core (basic tracing infrastructure) 0.5.108
    ... infrastructure is not actually what the LTT patches are doing. ... each trace entry includes: ... has static tracepoints too, in addition to the 20,000-40,000 mcount ... all this in SystemTap;-) If we add any static points to the kernel then ...
    (Linux-Kernel)
  • LTTng 0.55 for 2.6.27.6, tracepoint updates
    ... LTTng 0.55 now requires tracepoints to be declared (in ... documentation in Documentation/tracepoint.txt is updated accordingly, ... This removes the static declaration per-tracepoint which will make them ... I will post updates to tracepoints and markers ported to 2.6.28-rc soon. ...
    (Linux-Kernel)

Loading