x86, gentoo linux, perl-5.12.4, glibc-2.13, kernel-3.1.5: 
# softlimit -m 6000000 perl -le 'use version; print $version::VERSION'
0.96
# softlimit -m 5000000 perl -le 'use version; print $version::VERSION'
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = (unset),
        LC_NUMERIC = "C",
        LANG = "en_US.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
0.96
# softlimit -m 3000000 perl -le 'use version; print $version::VERSION'
perl: error while loading shared libraries: libc.so.6: failed to map s
+egment from shared object: Cannot allocate memory

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x86_64, gentoo linux, perl-5.12.4, glibc-2.13, kernel-3.2.2: 
# softlimit -m 21000000 perl -le 'use version; print $version::VERSION
+'
0.96
# softlimit -m 20000000 perl -le 'use version; print $version::VERSION
+'
Can't locate version/vpp.pm in @INC (@INC contains: /etc/perl /usr/lib
+64/perl5/site_perl/5.12.4/x86_64-linux /usr/lib64/perl5/site_perl/5.1
+2.4 /usr/lib64/perl5/vendor_perl/5.12.4/x86_64-linux /usr/lib64/perl5
+/vendor_perl/5.12.4 /usr/lib64/perl5/site_perl /usr/lib64/perl5/vendo
+r_perl /usr/lib64/perl5/5.12.4/x86_64-linux /usr/lib64/perl5/5.12.4 /
+usr/local/lib/site_perl .) at (eval 2) line 2.
BEGIN failed--compilation aborted at (eval 2) line 2.
Compilation failed in require at -e line 1.
BEGIN failed--compilation aborted at -e line 1.
# softlimit -m 19000000 perl -le 'use version; print $version::VERSION
+'
Out of memory!

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Anyone knows why the hell perl require SO much memory on 64-bit system? 6MB vs 21MB sounds just crazy.

In reply to memory usage on x86_64 by powerman

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