> On Jul 15, 2016, at 12:38 , James Orr <james....@wustl.edu> wrote: > > Hi all. > > I'm a relatively novice Valgrind user. I've used it in the past to ensure > that my code has no memory leaks, but that's about it. Now I suspect that > there is a memory stomp on an environment variable somewhere in my fairly > complex multi-threaded program that spawns different processes and makes > external library calls. For the first time I'm wanting to use some of > Valgrind's more advanced functions. I'm getting an error running what I > expected was a fairly simple command. > > $ valgrind ./[multi-threaded/multi-process-spawing program] [args] > runs fine and reveals 1 memory leak. > > $ valgrind --trace-children=yes ./[multi-threaded/multi-process-spawing > program] [args] > This traces everything that your process spawns, which in the case below means all three programs: * chrt * taskset * BuntingFEA(Small|Big)
You probably don’t want that. If you can arrange for it you want to remove the "—trace-children=yes" and replace the BuntingFEA(Small|Big) with a wrapper script that does something like: !#/bin/bash exec valgrind (valgrind params here) BuntingFEA(Small|Big) $* That way you don’t waste any resources on valgrinding chrt and taskset. I do exactly this for a similar situation, but I did it to avoid valgrinding an "xterm/tail -f logfile.txt” chain. — Trey > Doesn't spawn the new tasks and has some errors... > > > ==14590== Memcheck, a memory error detector > ==14590== Copyright (C) 2002-2012, and GNU GPL'd, by Julian Seward et al. > ==14590== Using Valgrind-3.8.1 and LibVEX; rerun with -h for copyright info > ==14590== Command: ./clustering_launcher BeamContinuumModelTSR1Short > ==14590== > Taskset is schedulable: BeamContinuumModelTSR1Short > Forking and execv-ing task BuntingFEASmall > Forking and execv-ing task BuntingFEABig > All tasks started > ==14591== Memcheck, a memory error detector > ==14591== Copyright (C) 2002-2012, and GNU GPL'd, by Julian Seward et al. > ==14591== Using Valgrind-3.8.1 and LibVEX; rerun with -h for copyright info > ==14591== Command: /usr/bin/chrt -r 97 taskset -c 1-7 ./BuntingFEASmall 1 7 > 97 0 976562 0 976562 0 0 10 RT_GOMP_CLUSTERING_BARRIER BuntingFEASmall > beamContinuumModel.txt beamContinuumParams.txt > ==14591== > ==14592== Memcheck, a memory error detector > ==14592== Copyright (C) 2002-2012, and GNU GPL'd, by Julian Seward et al. > ==14592== Using Valgrind-3.8.1 and LibVEX; rerun with -h for copyright info > ==14592== Command: /usr/bin/chrt -r 96 taskset -c 10-10 ./BuntingFEABig 10 10 > 96 0 976562 0 976562 0 0 10 RT_GOMP_CLUSTERING_BARRIER BuntingFEABig > beamContinuumModel.txt beamContinuumParams.txt > ==14592== > ==14591== Memcheck, a memory error detector > ==14591== Copyright (C) 2002-2012, and GNU GPL'd, by Julian Seward et al. > ==14591== Using Valgrind-3.8.1 and LibVEX; rerun with -h for copyright info > ==14591== Command: /bin/taskset -c 1-7 ./BuntingFEASmall 1 7 97 0 976562 0 > 976562 0 0 10 RT_GOMP_CLUSTERING_BARRIER BuntingFEASmall > beamContinuumModel.txt beamContinuumParams.txt > ==14591== > ==14592== Memcheck, a memory error detector > ==14592== Copyright (C) 2002-2012, and GNU GPL'd, by Julian Seward et al. > ==14592== Using Valgrind-3.8.1 and LibVEX; rerun with -h for copyright info > ==14592== Command: /bin/taskset -c 10-10 ./BuntingFEABig 10 10 96 0 976562 0 > 976562 0 0 10 RT_GOMP_CLUSTERING_BARRIER BuntingFEABig beamContinuumModel.txt > beamContinuumParams.txt > ==14592== > valgrind: failed to start tool 'memcheck' for platform 'x86-linux': No such > file or directory > valgrind: failed to start tool 'memcheck' for platform 'x86-linux': No such > file or directory > > > Can someone please tell me what I'm doing wrong? > > Thanks, > > James > ------------------------------------------------------------------------------ > What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic > patterns at an interface-level. Reveals which users, apps, and protocols are > consuming the most bandwidth. Provides multi-vendor support for NetFlow, > J-Flow, sFlow and other flows. Make informed decisions using capacity planning > reports.http://sdm.link/zohodev2dev_______________________________________________ > Valgrind-users mailing list > Valgrind-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/valgrind-users
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------------------------------------------------------------------------------ What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic patterns at an interface-level. Reveals which users, apps, and protocols are consuming the most bandwidth. Provides multi-vendor support for NetFlow, J-Flow, sFlow and other flows. Make informed decisions using capacity planning reports.http://sdm.link/zohodev2dev
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