[mercury-users] Using valgrind --tool=cachegrind with Mercury programs

[Julien Fischer]

Hi Quan,

On Thu, 20 Nov 2008, Quan Phan wrote:

> Hi everybody,
>
> I tried cachegrind on a normal naive reverse program that works on lists of
> integers.
> When the list is long enough, I got the following segmentation violation
> error. If a list has less than ~350 elements it works fine (the GC
> warning is still but no seg faults).

Is this with some form of RBMM enabled?  Could you post the program?

> I used rotd 18/11/2008 and the latest valgrind 3.3.1
> (but 'valgrind --version' showed 3.2.0-Debian).

What order do they occur in your PATH?

> Do you know a way I can try to get around it?

Does valgrind --tool=memcheck tell you anything more useful?

Cheers,
Julien.

...

> valgrind --tool=cachegrind ./nrev
> ==5772== Cachegrind, a cache and branch-prediction profiler.
> ==5772== Copyright (C) 2002-2007, and GNU GPL'd, by Nicholas Nethercote
> et al.
> ==5772== Using LibVEX rev 1854, a library for dynamic binary
> translation.
> ==5772== Copyright (C) 2004-2007, and GNU GPL'd, by OpenWorks LLP.
> ==5772== Using valgrind-3.3.1, a dynamic binary instrumentation
> framework.
> ==5772== Copyright (C) 2000-2007, and GNU GPL'd, by Julian Seward et al.
> ==5772== For more details, rerun with: -v
> ==5772==
> --5772-- warning: Pentium 4 with 12 KB micro-op instruction trace cache
> --5772--          Simulating a 16 KB I-cache with 32 B lines
> --5772-- DWARF2 CFI reader: unhandled CFI instruction 0:50
> --5772-- DWARF2 CFI reader: unhandled CFI instruction 0:50
> GC Warning: Too close to address space limit: blacklisting ineffective
>
> *** Mercury runtime: caught segmentation violation ***
> PC at signal: 73668433 (4641751)
> address involved: 0x1c
> This may have been caused by a stack overflow, due to unbounded
> recursion.
> exiting from signal handler
> ==5772==
> ==5772== I   refs:      25,557,038
> ==5772== I1  misses:         3,567
> ==5772== L2i misses:         2,062
> ==5772== I1  miss rate:       0.01%
> ==5772== L2i miss rate:       0.00%
> ==5772==
> ==5772== D   refs:      13,571,679  (6,649,729 rd   + 6,921,950 wr)
> ==5772== D1  misses:       396,339  (  102,415 rd   +   293,924 wr)
> ==5772== L2d misses:       349,595  (   60,706 rd   +   288,889 wr)
> ==5772== D1  miss rate:        2.9% (      1.5%     +       4.2%  )
> ==5772== L2d miss rate:        2.5% (      0.9%     +       4.1%  )
> ==5772==
> ==5772== L2 refs:          399,906  (  105,982 rd   +   293,924 wr)
> ==5772== L2 misses:        351,657  (   62,768 rd   +   288,889 wr)
> ==5772== L2 miss rate:         0.8% (      0.1%     +       4.1%  )
>
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