develooper Front page | perl.perl5.porters | Postings from May 2004

Re: [perl #29873] seg fault w/v5.8.4 on IBM RS/6k when populating large hash

Thread Previous
From:
H.Merijn Brand
Date:
May 26, 2004 01:49
Subject:
Re: [perl #29873] seg fault w/v5.8.4 on IBM RS/6k when populating large hash
Message ID:
20040526104629.6EFF.H.M.BRAND@hccnet.nl
On Wed 26 May 2004 02:41, "al.danial@ngc.com (via RT)" <perlbug-followup@perl.org> wrote:
> # New Ticket Created by  al.danial@ngc.com 
> # Please include the string:  [perl #29873]
> # in the subject line of all future correspondence about this issue. 
> # <URL: http://rt.perl.org:80/rt3/Ticket/Display.html?id=29873 >
> 
> 
> This is a bug report for perl from al.danial@ngc.com,
> generated with the help of perlbug 1.35 running under perl v5.8.4.
> 
> 
> -----------------------------------------------------------------
> This program causes a seg fault on an IBM RS/6000 with AIX 4.3.3.
> 
>     #!/usr/local/perl-5.8.4/bin/perl -w
>     my $upper_limit;
>     $upper_limit = 275000;  # works
>     $upper_limit = 300000;  # fails
>     my %data = ();
>     foreach my $set (qw( A B C )) {
>         foreach my $id (1..$upper_limit) {
>             $data{$set}{$id} = [ rand, rand, rand, rand, rand, rand, rand, ];
>         }
>     }

That fully depends on your system configuration. On my system, the first limit
also causes problems on both recent and older perl's:

i2:/tmp 103 > perl test.pl
Out of memory!
Exit 1
i2:/tmp 104 >

i2:/tmp 104 > perl5.6.1 test.pl
Out of memory!
Exit 1
i2:/tmp 105 >

No seg faults though. Mahor difference between my perl's and yours is that
myine are built with vac, and your's are built with gcc.

> The failure happens with Perl version 5.6.1 on the IBM as well.
> 
> The workstation has 8 GB of memory so I don't think it is because
> the code is using too much space.  The above program works fine
> on Linux, Sun, and SGI workstations using Perl 5.8.0.
> 
> 
> [Please do not change anything below this line]
> -----------------------------------------------------------------
> ---
> Flags:
>     category=core
>     severity=high
> ---
> Site configuration information for perl v5.8.4:
> 
> Configured by adanial at Thu May 20 11:47:39 PDT 2004.
> 
> Summary of my perl5 (revision 5 version 8 subversion 4) configuration:
>   Platform:
>     osname=aix, osvers=4.3.3.0, archname=aix
>     uname='aix mohr 3 4 00041bcf4c00 '
>     config_args='-Dprefix=/usr/local/perl-5.8.4 -Dcc=gcc -de'
>     hint=recommended, useposix=true, d_sigaction=define
>     usethreads=undef use5005threads=undef useithreads=undef usemultiplicity=undef
>     useperlio=define d_sfio=undef uselargefiles=define usesocks=undef
>     use64bitint=undef use64bitall=undef uselongdouble=undef
>     usemymalloc=n, bincompat5005=undef
>   Compiler:
>     cc='gcc', ccflags ='-D_ALL_SOURCE -D_ANSI_C_SOURCE -D_POSIX_SOURCE -DUSE_NATIVE_DLOPEN -fno-strict-aliasing -I/usr/local/include -D_LARGE_FILES',
>     optimize='-O',
>     cppflags='-D_ALL_SOURCE -D_ANSI_C_SOURCE -D_POSIX_SOURCE -DUSE_NATIVE_DLOPEN -fno-strict-aliasing -I/usr/local/include'
>     ccversion='', gccversion='3.3.3', gccosandvers='aix4.3.3.0'
>     intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=4321
>     d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=8
>     ivtype='long', ivsize=4, nvtype='double', nvsize=8, Off_t='off_t', lseeksize=8
>     alignbytes=8, prototype=define
>   Linker and Libraries:
>     ld='gcc', ldflags =' -Wl,-brtl -L/usr/local/lib -Wl,-b32'
>     libpth=/usr/local/lib /lib /usr/lib /usr/ccs/lib
>     libs=-lbind -lnsl -lgdbm -ldbm -ldb -ldl -lld -lm -lcrypt -lc -lbsd
>     perllibs=-lbind -lnsl -ldl -lld -lm -lcrypt -lc -lbsd
>     libc=/lib/libc.a, so=a, useshrplib=false, libperl=libperl.a
>     gnulibc_version=''
>   Dynamic Linking:
>     dlsrc=dl_aix.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Xlinker -bE:/usr/local/perl-5.8.4/lib/5.8.4/aix/CORE/perl.exp'
>     cccdlflags=' ', lddlflags='  -Wl,-bhalt:4 -Wl,-bM:SRE -Wl,-bI:$(PERL_INC)/perl.exp -Wl,-bE:$(BASEEXT).exp -Wl,-bnoentry -lc -L/usr/local/lib'
> 
> Locally applied patches:
>     
> 
> ---
> @INC for perl v5.8.4:
>     /usr/local/perl-5.8.4/lib/5.8.4/aix
>     /usr/local/perl-5.8.4/lib/5.8.4
>     /usr/local/perl-5.8.4/lib/site_perl/5.8.4/aix
>     /usr/local/perl-5.8.4/lib/site_perl/5.8.4
>     /usr/local/perl-5.8.4/lib/site_perl
>     .
> 
> ---
> Environment for perl v5.8.4:
>     HOME=/home/adanial
>     LANG=en_US
>     LANGUAGE (unset)
>     LC__FASTMSG=true
>     LD_LIBRARY_PATH=/opt/platform/lsf/4.2/aix4/lib:/usr/local/kmatplot-0.2.2/lib
>     LIBPATH=/usr/lib::/opt/matlab53/extern/lib/ibm_rs
>     LOGDIR (unset)
>     PATH=/opt/platform/lsf/4.2/aix4/bin:/opt/platform/lsf/4.2/aix4/etc:/opt/IDEAS7/ideas/ms7/bin:/home/adanial/bin:/bin:/usr/bin:/usr/ccs/bin:/usr/ucb:/usr/bin/X11:/usr/dt/bin:/usr/local/bin:.:/opt/sysnoise/5.5/bin:/opt/matlab53/bin:/opt/langtools/bin:/opt/linux/IBMJava2-13/bin
>     PERL_BADLANG (unset)
>     SHELL=/bin/bash
> 

-- 
H.Merijn Brand        Amsterdam Perl Mongers (http://amsterdam.pm.org/)
using perl-5.6.1, 5.8.3, & 5.9.x, and 809 on  HP-UX 10.20 & 11.00, 11i,
   AIX 4.3, SuSE 9.0, and Win2k.           http://www.cmve.net/~merijn/
http://archives.develooper.com/daily-build@perl.org/   perl-qa@perl.org
send smoke reports to: smokers-reports@perl.org, QA: http://qa.perl.org



Thread Previous


nntp.perl.org: Perl Programming lists via nntp and http.
Comments to Ask Bjørn Hansen at ask@perl.org | Group listing | About