On Dienstag, 29. September 2020 12:19:24 CEST LEPAREUR Loic wrote:
> Le 21/09/2020 à 17:04, Milian Wolff a écrit :
> > On Donnerstag, 17. September 2020 15:32:04 CEST John Reiser wrote:
> >> On 2020-09-17 LEPAREUR Loic wrote:
> >>> Several years ago, I developed a
o runtime-attach heaptrack after you finished your
initialization phase to only record the main computational loop. The overhead
should be minimal or actually close to zero when your main loop isn't
allocating anything.
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De
0041db10 to a symbol works fine, the shared library
> (74a6c1b1) is a bit troublesome though (disabled
> randomize_va_space and using eu-addr2line).
You have to take the memory mapping of the library into account and subtract
that offset from the address.
Any
n!
And finally, with heaptrack it is also not yet easily doable to get a diff
between two time stamps. Also a feature I've long thought about implementing,
but never got around to...
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at you can do (afaik) is use vgdb to trigger snapshots of massif
files.
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Milian Wolff
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of the 2x.
Depending on what you are trying to achive, I suggest looking into a sampling
profiler like perf. If you let it run for a really long time, the data file
will be enormous, so I suggest you do some kind of live analysis (perf top).
Bye
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Milian Wolff
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On Monday, June 27, 2016 6:08:42 PM CEST Ana Rey wrote:
> Hi
>
> Is there a tool (like cg-merge) which can merge multiple callgrind
> output files into one
Not that I know of, but you can open multiple ones into KCacheGrind in one
session and visualize the combined results.
Bye
es --call-graph dwarf
Visualize it then with either a FlameGraph, ur directly with perf report.
HTH
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Milian Wolff
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to spent more time on making it
configurable if there's interest.
What do you think?
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Valgrind
specifically define the construction order by calling foo somewhere in your
code.
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=RelWithDebInfo -DCMAKE_INSTALL_PREFIX=something ..
make
make install
bye, HTH
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Or attach to a running process:
heaptrack -p $(pidof yourapp)
# ...
^C
heaptrack_print heaptrack.yourapp.$$.gz | less
The source code is tiny, and hopefully easy to read and hack. Patches welcome!
Cheers, happy profiling
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Milian Wolff
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be trivial. No clue
about ms_print though.
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totally agree that
having markers in massif output would be an excellent addition! VTune also
supports something like that for its runtime performance analysis.
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/the-standard
[2]: http://preshing.com/20130930/double-checked-locking-is-fixed-in-cpp11/
HTH
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guess.
Rather, try the thread sanitizer.
http://clang.llvm.org/docs/ThreadSanitizer.html
Cheers
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Compiled the above with g++ -g -O0 -Wall
Is it b/c this is referencing a non-existing stack space? If I change the code
to read
int* billy = new int[2];
Valgrind can find the error...
Cheers
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Cheers
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)
Generally, do you have serious reasons to doubt that your app will work the
same, no matter the size of the input? Otherwise your app might be just fine,
if it works for smaller input sizes.
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program in C:
Note: for the time being, you could just use suppression files, pass e.g.
the --gen-suppression=yes option to memcheck. See man valgrind for more
information.
bye
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/forum.php?thread_name=CCDD9C8988907D4EA7F00EC35DA7C6CC2FE0039B%40CICW-VMXCHG1.computrition.comforum_name=valgrind-users
you got two suggestions: Massif-Visualizer or MassifG
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or was there a
reason for this?
Thanks, bye
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The output message mentioned
maybe try -O0 to turn off optimizations? Or -gfull ?
good luck
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On Monday, 6. September 2010 20:27:39 Dallman, John wrote:
Use --num-callers=25, or any other number. This is in valgrind --help,
but isn't specific to memcheck.
took some time but I finally made use of it and it helped like a charm.
Thanks!
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Milian Wolff
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as
it doesn't show me the real caller that triggered the delete.
Bye
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doesn't show any problems in valgrind for me:
http://mwolff.pastebin.com/JxCgvtK9
:(
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for us, I'll just ignore it for now :) I hoped someone
would see a glaring error or something, well thanks anyways.
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-positive? Or is stat / utimes
really wrong here? Note that we haven't had any problems so far (at least
none from which we know).
Bye
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Wolff
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On Friday, 16. July 2010 00:57:37 Josef Weidendorfer wrote:
Hi Milian,
On Thursday 15 July 2010, Milian Wolff wrote:
Would the callgrind data allow grouping by thread in KCacheGrind's
evaluation? Isn't something like
myMethod()'X
indicating the thread number with the X?
Short
, it could become much easier to find user noticable lags.
What do you think?
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?
That segfaults even earlier and gives a totally useless backtrace without any
debug info...
Hints?
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On Thursday 15 April 2010 13:55:16 Alexander Potapenko wrote:
On Thu, Apr 15, 2010 at 3:45 PM, Milian Wolff m...@milianw.de wrote:
Hey all!
When I try to profile the whole startup of KDevelop using callgrind, I
and at least one of the other developers, get a reproducible segfault
, I love it!
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