max # of threads

Discussion in 'Perl Misc' started by gmlvsk2@gmail.com, Oct 31, 2006.

  1. Guest

    i use ver 5.8.8 on linux.
    2 gig of memory
    Running this example perl dies after 295 threads.
    JVM lets me create tens of thousands.
    Is perl so limited when it comes to threads?

    test script---------------------------
    use strict;
    use threads;

    for(my $i=0; ; $i++){
    threads->new(\&f1);
    print "$i\n";
    }

    sub f1{
    sleep 100;
    }

    output ----------------------------------
    291
    292
    293
    294
    295
    Thread creation failed: pthread_create returned 12 at tmp.pl line 5.
    296
    Thread creation failed: pthread_create returned 12 at tmp.pl line 5.
    297
    Thread creation failed: pthread_create returned 12 at tmp.pl line 5.
    298
    Thread creation failed: pthread_create returned 12 at tmp.pl line 5.
    299

    ....
    Thread creation failed: pthread_create returned 12 at tmp.pl line 5.
    383
    Out of memory!
    Segmentation fault
     
    , Oct 31, 2006
    #1
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  2. Guest

    wrote:
    > i use ver 5.8.8 on linux.
    > 2 gig of memory


    what architecture and version of linux?

    > Running this example perl dies after 295 threads.


    Hmmm. I get 1232 with the 5.8.8 on a machine with 2 gig of memory before
    it does with a out of memory error. God knows why I would want to, but I
    can.

    This is perl, v5.8.8 built for i686-linux-thread-multi

    2.4.21-15.0.3.ELsmp #1 SMP Tue Jun 29 18:04:47 EDT 2004 i686 unknown
    unknown GNU/Linux

    > JVM lets me create tens of thousands.


    So, if you need tens of thousands of threads, use Java.

    > Is perl so limited when it comes to threads?


    Apparently. I've never viewed the creation of threads as a worthy goal
    in and of itself, so it doesn't seem like much of a limitation to me.

    Xho

    --
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    Usenet Newsgroup Service $9.95/Month 30GB
     
    , Oct 31, 2006
    #2
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  3. Guest

    Here is some more info

    Linux 2.6.15-1.2054_FC5smp #1 SMP Tue Mar 14 16:05:46 EST 2006 i686
    i686 i386 GNU/Linux

    Summary of my perl5 (revision 5 version 8 subversion 8) configuration:
    Platform:
    osname=linux, osvers=2.6.9-22.18.bz155725.elsmp,
    archname=i386-linux-thread-multi
    uname='linux hs20-bc1-6.build.redhat.com 2.6.9-22.18.bz155725.elsmp
    #1 smp thu nov 17 15:34:08 est 2005 i686 i686 i386 gnulinux '
    config_args='-des -Doptimize=-O2 -g -pipe -Wall
    -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector
    --param=ssp-buffer-size=4 -m32 -march=i386 -mtune=generic
    -fasynchronous-unwind-tables -Dversion=5.8.8 -Dmyhostname=localhost
    -Dperladmin=root@localhost -Dcc=gcc -Dcf_by=Red Hat, Inc.
    -Dinstallprefix=/usr -Dprefix=/usr -Darchname=i386-linux
    -Dvendorprefix=/usr -Dsiteprefix=/usr -Duseshrplib -Dusethreads
    -Duseithreads -Duselargefiles -Dd_dosuid -Dd_semctl_semun -Di_db
    -Ui_ndbm -Di_gdbm -Di_shadow -Di_syslog -Dman3ext=3pm -Duseperlio
    -Dinstallusrbinperl=n -Ubincompat5005 -Uversiononly
    -Dpager=/usr/bin/less -isr -Dd_gethostent_r_proto
    -Ud_endhostent_r_proto -Ud_sethostent_r_proto -Ud_endprotoent_r_proto
    -Ud_setprotoent_r_proto -Ud_endservent_r_proto -Ud_setservent_r_proto
    -Dinc_version_list=5.8.7 5.8.6 5.8.5 5.8.4 5.8.3 -Dscriptdir=/usr/bin'
    hint=recommended, useposix=true, d_sigaction=define
    usethreads=define use5005threads=undef useithreads=define
    usemultiplicity=define
    useperlio=define d_sfio=undef uselargefiles=define usesocks=undef
    use64bitint=undef use64bitall=undef uselongdouble=undef
    usemymalloc=n, bincompat5005=undef
    Compiler:
    cc='gcc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -fno-strict-aliasing
    -pipe -Wdeclaration-after-statement -I/usr/local/include
    -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -I/usr/include/gdbm',
    optimize='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions
    -fstack-protector --param=ssp-buffer-size=4 -m32 -march=i386
    -mtune=generic -fasynchronous-unwind-tables',
    cppflags='-D_REENTRANT -D_GNU_SOURCE -fno-strict-aliasing -pipe
    -Wdeclaration-after-statement -I/usr/local/include -I/usr/include/gdbm'
    ccversion='', gccversion='4.1.0 20060228 (Red Hat 4.1.0-1)',
    gccosandvers=''
    intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=1234
    d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=12
    ivtype='long', ivsize=4, nvtype='double', nvsize=8, Off_t='off_t',
    lseeksize=8
    alignbytes=4, prototype=define
    Linker and Libraries:
    ld='gcc', ldflags =' -L/usr/local/lib'
    libpth=/usr/local/lib /lib /usr/lib
    libs=-lresolv -lnsl -lgdbm -ldb -ldl -lm -lcrypt -lutil -lpthread
    -lc
    perllibs=-lresolv -lnsl -ldl -lm -lcrypt -lutil -lpthread -lc
    libc=/lib/libc-2.3.90.so, so=so, useshrplib=true,
    libperl=libperl.so
    gnulibc_version='2.3.90'
    Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E
    -Wl,-rpath,/usr/lib/perl5/5.8.8/i386-linux-thread-multi/CORE'
    cccdlflags='-fPIC', lddlflags='-shared -L/usr/local/lib'


    Characteristics of this binary (from libperl):
    Compile-time options: MULTIPLICITY PERL_IMPLICIT_CONTEXT
    PERL_MALLOC_WRAP USE_ITHREADS USE_LARGE_FILES
    USE_PERLIO USE_REENTRANT_API
    Built under linux
    Compiled at Mar 1 2006 18:29:53
    @INC:
    /usr/lib/perl5/site_perl/5.8.8/i386-linux-thread-multi
    /usr/lib/perl5/site_perl/5.8.7/i386-linux-thread-multi
    /usr/lib/perl5/site_perl/5.8.6/i386-linux-thread-multi
    /usr/lib/perl5/site_perl/5.8.5/i386-linux-thread-multi
    /usr/lib/perl5/site_perl/5.8.4/i386-linux-thread-multi
    /usr/lib/perl5/site_perl/5.8.3/i386-linux-thread-multi
    /usr/lib/perl5/site_perl/5.8.8
    /usr/lib/perl5/site_perl/5.8.7
    /usr/lib/perl5/site_perl/5.8.6
    /usr/lib/perl5/site_perl/5.8.5
    /usr/lib/perl5/site_perl/5.8.4
    /usr/lib/perl5/site_perl/5.8.3
    /usr/lib/perl5/site_perl
    /usr/lib/perl5/vendor_perl/5.8.8/i386-linux-thread-multi
    /usr/lib/perl5/vendor_perl/5.8.7/i386-linux-thread-multi
    /usr/lib/perl5/vendor_perl/5.8.6/i386-linux-thread-multi
    /usr/lib/perl5/vendor_perl/5.8.5/i386-linux-thread-multi
    /usr/lib/perl5/vendor_perl/5.8.4/i386-linux-thread-multi
    /usr/lib/perl5/vendor_perl/5.8.3/i386-linux-thread-multi
    /usr/lib/perl5/vendor_perl/5.8.8
    /usr/lib/perl5/vendor_perl/5.8.7
    /usr/lib/perl5/vendor_perl/5.8.6
    /usr/lib/perl5/vendor_perl/5.8.5
    /usr/lib/perl5/vendor_perl/5.8.4
    /usr/lib/perl5/vendor_perl/5.8.3
    /usr/lib/perl5/vendor_perl
    /usr/lib/perl5/5.8.8/i386-linux-thread-multi
    /usr/lib/perl5/5.8.8
     
    , Oct 31, 2006
    #3
  4. Guest

    Here is some more info

    Linux 2.6.15-1.2054_FC5smp #1 SMP Tue Mar 14 16:05:46 EST 2006 i686
    i686 i386 GNU/Linux

    Summary of my perl5 (revision 5 version 8 subversion 8) configuration:
    Platform:
    osname=linux, osvers=2.6.9-22.18.bz155725.elsmp,
    archname=i386-linux-thread-multi
    uname='linux hs20-bc1-6.build.redhat.com 2.6.9-22.18.bz155725.elsmp
    #1 smp thu nov 17 15:34:08 est 2005 i686 i686 i386 gnulinux '
    config_args='-des -Doptimize=-O2 -g -pipe -Wall
    -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector
    --param=ssp-buffer-size=4 -m32 -march=i386 -mtune=generic
    -fasynchronous-unwind-tables -Dversion=5.8.8 -Dmyhostname=localhost
    -Dperladmin=root@localhost -Dcc=gcc -Dcf_by=Red Hat, Inc.
    -Dinstallprefix=/usr -Dprefix=/usr -Darchname=i386-linux
    -Dvendorprefix=/usr -Dsiteprefix=/usr -Duseshrplib -Dusethreads
    -Duseithreads -Duselargefiles -Dd_dosuid -Dd_semctl_semun -Di_db
    -Ui_ndbm -Di_gdbm -Di_shadow -Di_syslog -Dman3ext=3pm -Duseperlio
    -Dinstallusrbinperl=n -Ubincompat5005 -Uversiononly
    -Dpager=/usr/bin/less -isr -Dd_gethostent_r_proto
    -Ud_endhostent_r_proto -Ud_sethostent_r_proto -Ud_endprotoent_r_proto
    -Ud_setprotoent_r_proto -Ud_endservent_r_proto -Ud_setservent_r_proto
    -Dinc_version_list=5.8.7 5.8.6 5.8.5 5.8.4 5.8.3 -Dscriptdir=/usr/bin'
    hint=recommended, useposix=true, d_sigaction=define
    usethreads=define use5005threads=undef useithreads=define
    usemultiplicity=define
    useperlio=define d_sfio=undef uselargefiles=define usesocks=undef
    use64bitint=undef use64bitall=undef uselongdouble=undef
    usemymalloc=n, bincompat5005=undef
    Compiler:
    cc='gcc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -fno-strict-aliasing
    -pipe -Wdeclaration-after-statement -I/usr/local/include
    -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -I/usr/include/gdbm',
    optimize='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions
    -fstack-protector --param=ssp-buffer-size=4 -m32 -march=i386
    -mtune=generic -fasynchronous-unwind-tables',
    cppflags='-D_REENTRANT -D_GNU_SOURCE -fno-strict-aliasing -pipe
    -Wdeclaration-after-statement -I/usr/local/include -I/usr/include/gdbm'
    ccversion='', gccversion='4.1.0 20060228 (Red Hat 4.1.0-1)',
    gccosandvers=''
    intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=1234
    d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=12
    ivtype='long', ivsize=4, nvtype='double', nvsize=8, Off_t='off_t',
    lseeksize=8
    alignbytes=4, prototype=define
    Linker and Libraries:
    ld='gcc', ldflags =' -L/usr/local/lib'
    libpth=/usr/local/lib /lib /usr/lib
    libs=-lresolv -lnsl -lgdbm -ldb -ldl -lm -lcrypt -lutil -lpthread
    -lc
    perllibs=-lresolv -lnsl -ldl -lm -lcrypt -lutil -lpthread -lc
    libc=/lib/libc-2.3.90.so, so=so, useshrplib=true,
    libperl=libperl.so
    gnulibc_version='2.3.90'
    Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E
    -Wl,-rpath,/usr/lib/perl5/5.8.8/i386-linux-thread-multi/CORE'
    cccdlflags='-fPIC', lddlflags='-shared -L/usr/local/lib'


    Characteristics of this binary (from libperl):
    Compile-time options: MULTIPLICITY PERL_IMPLICIT_CONTEXT
    PERL_MALLOC_WRAP USE_ITHREADS USE_LARGE_FILES
    USE_PERLIO USE_REENTRANT_API
    Built under linux
    Compiled at Mar 1 2006 18:29:53
    @INC:
    /usr/lib/perl5/site_perl/5.8.8/i386-linux-thread-multi
    /usr/lib/perl5/site_perl/5.8.7/i386-linux-thread-multi
    /usr/lib/perl5/site_perl/5.8.6/i386-linux-thread-multi
    /usr/lib/perl5/site_perl/5.8.5/i386-linux-thread-multi
    /usr/lib/perl5/site_perl/5.8.4/i386-linux-thread-multi
    /usr/lib/perl5/site_perl/5.8.3/i386-linux-thread-multi
    /usr/lib/perl5/site_perl/5.8.8
    /usr/lib/perl5/site_perl/5.8.7
    /usr/lib/perl5/site_perl/5.8.6
    /usr/lib/perl5/site_perl/5.8.5
    /usr/lib/perl5/site_perl/5.8.4
    /usr/lib/perl5/site_perl/5.8.3
    /usr/lib/perl5/site_perl
    /usr/lib/perl5/vendor_perl/5.8.8/i386-linux-thread-multi
    /usr/lib/perl5/vendor_perl/5.8.7/i386-linux-thread-multi
    /usr/lib/perl5/vendor_perl/5.8.6/i386-linux-thread-multi
    /usr/lib/perl5/vendor_perl/5.8.5/i386-linux-thread-multi
    /usr/lib/perl5/vendor_perl/5.8.4/i386-linux-thread-multi
    /usr/lib/perl5/vendor_perl/5.8.3/i386-linux-thread-multi
    /usr/lib/perl5/vendor_perl/5.8.8
    /usr/lib/perl5/vendor_perl/5.8.7
    /usr/lib/perl5/vendor_perl/5.8.6
    /usr/lib/perl5/vendor_perl/5.8.5
    /usr/lib/perl5/vendor_perl/5.8.4
    /usr/lib/perl5/vendor_perl/5.8.3
    /usr/lib/perl5/vendor_perl
    /usr/lib/perl5/5.8.8/i386-linux-thread-multi
    /usr/lib/perl5/5.8.8
     
    , Oct 31, 2006
    #4
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