Re: [Kcachegrind-callgrind] meaning of "lr" in Source Code View

[Josef W. <Jos...@gm...>]

Am 28.08.2015 um 12:11 schrieb Simon Brandner:
> When I open a callgrind trace and go the the "Source Code" view, it
> shows a column labelled "lr".
> I have not found any documentation about this value. The numbers seem
> to be very similar to the cycle estimate "CEst" which can be manually
> selected in the View options.

This is "Ir", not "lr".
Usually, KCachegrind should know about this, and use "Instruction Fetch"
as description instead. It is the number of x86 instructions executed.

If you do not use the cache simulator in Callgrind, this actually is the
same as "CEst" = Cycle Estimation = Approximation of time used. This
approximation assumes that time used is proportional to the number of
instructions executed, as there is no other information available without
cache simulation switched on.

Cheers,
Josef

> 
> Can you explain the difference between these two values?
> 
> I am using the 0.7.2kde version on Centos 7.
> 
> Thank you!
> 
> Regards,
> 
> Simon
> 
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