I see this, but I'm not quite sure what's going on. What I do see is that par-map of 1+ on a list is horribly slow, both on 2.0 and master. Ludovic do you know what's going on here?
Andy On Sun 30 Jun 2013 20:00, David Pirotte <da...@altosw.be> writes: > Hello, > > guile --version > guile (GNU Guile) 2.0.9.20-10454 > > It seems that the par-map not using all cores problem has some how been > reintroduced? > > guile -c '(begin (use-modules (ice-9 threads)) (par-map 1+ (iota > 400000)))' > > only uses 1 core [it seems it uses some other [maybe all, i can't tell] a > couple of > milliseconds, then drops to 1 core only. > > Thanks, > David > > ;; -- > > david@idefix:~ 16 $ guile -c '(begin >> (use-modules (ice-9 threads)) >> (par-map 1+ (iota 400)) >> (display (current-processor-count)) (display "\n") >> (display (length (@@ (ice-9 futures) %workers))) (display "\n"))' > 12 > 11
