Maybe because before I run UnixBench on Debian 7 and Ubuntu 14.04 so do not know if in CentOS 6 when executed even error message appears:
Can't locate Time/HiRes.pm in @INC (@INC contains: /usr/local/lib/perl5 /usr/local/share/perl5 /usr/lib/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib/perl5 /usr/share/perl5 .) at ./Run line 6. BEGIN failed--compilation aborted at ./Run line 6.
Yes, somewhat confused also the lack of what but from the description there seems to be less than the Perl package is installed. After I find out that the Time / HiRes.pm file being searched is a Perl module named Time :: HiRes and it functions to add usleep, ualarm, gettimeofday, and other time calculations that are more precise than the standard. How to fix it? Fortunately it is very easy, in CentOS just run the following command:
yum install perl-Time-HiRes
Done, and I successfully run the benchmark script earlier. Just waiting for the results only.