Assuming I'm reading this correctly, it doesn't look like thread-enabled:

test:~$ perl -V
Summary of my perl5 (revision 5 version 8 subversion 6) configuration:
  Platform:
    osname=openbsd, osvers=3.8, archname=i386-openbsd
    uname='openbsd'
    config_args='-dsE -Dopenbsd_distribution=defined'
    hint=recommended, useposix=true, d_sigaction=define
    usethreads=undef use5005threads=undef useithreads=undef usemultipl
+icity=undef
    useperlio=define d_sfio=undef uselargefiles=define usesocks=undef
    use64bitint=undef use64bitall=undef uselongdouble=undef
    usemymalloc=n, bincompat5005=undef
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