Maybe I'm wrong but in the manual it says that : "...For a short-running
program like this, we can use the --time-unit=B option to specify that we
want the time unit to instead be the number of bytes allocated/deallocated
on the heap and stack(s)...."
Which means the time unit is the number of bytes allocated/deallacated on
the head __and__ stack.
On Tue, Jun 21, 2011 at 3:56 PM, Eric Schwarz <[email protected]>wrote:
> **
> Hi all
>
>
> Sorry for posting this question again. However, it is rather important for
> my diploma thesis.
>
> What does the x-axis represent exactly when '--time-unit=B' is used
> together with 'massif' and 'ms_print'?
>
> Or is this rather a question related to 'valgrind-developers' mailing list?
>
> Please see for the intention of my question the previous post below.
>
>
> Many thanks
> Eric
>
> -------- Original-Nachricht -------- Betreff: [Valgrind-users] Massif:
> --time-unit=B Datum: Mon, 06 Jun 2011 19:18:12 +0200 Von: Eric Schwarz
> <[email protected]> <[email protected]> An:
> [email protected]
>
> Hi all
>
>
> When using 'massif' it is recommended for short programs to use
> '--time-unit=B' option since o/w no or hardly any output is shown using
> ms_print for visualisation [1].
>
> My question is now regarding the units of the x-axis.
>
> As far as I have understood represents the unit the cumulated number of
> bytes allocated and freed when option '--time-unit=B' is used.
>
> Snapshots are taken for allocations and de-allocations, but also
> in-between of them.
>
> Since the value of the y-axis (Each vertical bar represents a snapshot,
> i.e. a measurement of the memory usage at a certain point in time. [1])
> and the value of the x-axis, which represents the cumulated number of
> bytes allocated and freed, have a dependency to each other, how is it
> possible that a parallel line to the x-axis is drawn in the graph [1]
> since actually only a change in the heap usage should generate a forward
> move on the x-axis.
>
> Hope my problem was described somehow comprehensible.
>
>
> Many thanks for your contributions
> Eric
>
> [1]...http://valgrind.org/docs/manual/ms-manual.html
>
>
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