use the /s (or /m) and /g modifiers to treat the string as a single line (or as multiple lines) and get multiple matches:

my @matches =~ m/(\S+)\s+(\d+)/mg; # or /sg
if ( @matches ) { ...

Update: even better using a hash:

my %matches =~ m/(\S+)\s+(\d+)/sg; # or /mg
foreach ( keys %matches ) { ...

Update 2: Added small print /s ( + /m ) ambiguity...
See   perldoc perlre   for more info on perl regular expressions and those and other flags.

Cheers, Sören