On Wednesday 16 June 2010, Satya V. Gupta wrote: > I made the suggested change (bumped up the Stack size to 512 pages instead > of the 16) and continue to have another problem.
If it really is a problem with the tools stack size, instead of increasing to 512 pages, you can also run with "--demangle=no". This will not call into the C++ symbol demangler, which is the only part that needs large stack sizes. > I have only 256MB RAM in my device and when I bumped up the stack to 512 > pages as suggested, all processes go to sleep. The change in stack size > obviously changed the behavior of Valgrind. > > The original problem I had was that VG_(strcmp) in callgrind caused a > SIGSEGV. The reason it was suggested that I bump up the stack size was that > Boost libraries use very long names. > > In my mind, I am better off limiting the size of the two strings that are > offered to VG_(strcmp) to some MAX_STRING_SIZE instead of increasing the > stack size. However, I do not know what is a reasonable value for > MAX_STRING_SIZE? Does anyone have a suggestion on what size I should use > here? Does your code run with "--tool=none" on that device at all? Do you run with cache simulator on or off (off is better for memory usage)? Instead of playing around with strings used only once, you are better off restricting the number of cost counters in Callgrind: e.g. you could switch on instrumentation only when running the interesting parts of your code, see the macro CALLGRIND_START_INSTRUMENTATION defined in callgrind.h (to be used in the *client code*). Josef > > Thanks > > SVG > > -----Original Message----- > From: bart.vanass...@gmail.com [mailto:bart.vanass...@gmail.com] On Behalf > Of Bart Van Assche > Sent: Sunday, June 13, 2010 6:06 AM > To: Satya V. Gupta > Cc: valgrind-users@lists.sourceforge.net > Subject: Re: [Valgrind-users] Running Valgrind on ELF/ python/ boost based > executables > > On Sun, Jun 13, 2010 at 11:47 AM, Satya V. Gupta <guptasa...@netzero.net> > wrote: > > I have a supervisory process that is kicked off by an ELF executable > > which in turn invokes some ELF/ python script/ executables based child > processes. > > I wish to run valgrind with --tool=callgrind and be able to inject > > valgrind into all processes. So far I have tried to run the > > supervisory process with --trace-children=yes and of course > --tool=callgrind switches. > > > > Any ELF based executable process stays up but valgrind receives a > > SIGSEGV from all the others. It leaves behind an identical call stack > > strace with a bunch of exception handlers that pass through the main > > python executable and a bunch of boost libraries. > > > > Does anyone have recommendations on how to run python/ boost based > > executable? > > Instead of asking the same question twice, you should try the suggestion > that was posted in reply to your message on the valgrind-developers mailing > list (see also > http://sourceforge.net/mailarchive/forum.php?thread_name=201006122144.03178. > jseward%40acm.org&forum_name=valgrind-developers). > > Bart. > > > > > ____________________________________________________________ > Get Free Email with Video Mail & Video Chat! > http://www.netzero.net/freeemail?refcd=NZTAGOUT1FREM0210 > > ------------------------------------------------------------------------------ > ThinkGeek and WIRED's GeekDad team up for the Ultimate > GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE to the > lucky parental unit. See the prize list and enter to win: > http://p.sf.net/sfu/thinkgeek-promo > _______________________________________________ > Valgrind-users mailing list > Valgrind-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/valgrind-users > ------------------------------------------------------------------------------ ThinkGeek and WIRED's GeekDad team up for the Ultimate GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE to the lucky parental unit. See the prize list and enter to win: http://p.sf.net/sfu/thinkgeek-promo _______________________________________________ Valgrind-users mailing list Valgrind-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/valgrind-users
