bug#12789: threads - proc-map - multicore issue

[David Pirotte]

Hello,

in the following example, the cores, 4 in my case, are used for a couple of 
seconds,
then at some point only one core is used:

guile -c '(begin (use-modules (ice-9 threads)) (par-map 1+ (iota 400000)))'

Cheers,
David