Custom Query (1030 matches)

I want to use CCL for signal processing and I'm using bordeaux-fft. However, this is quite slow and conses a lot, presumably because CCL lacks specialized arrays for complex numbers (single-float and double-float), in contrast to, e.g., SBCL

(upgraded-array-element-type '(complex double-float)) ==> T

seems to attest this assumption. So I ask you to add specialized arrays of (complex single-float) and (complex double-float)

Are specialized arrays for complex numbers supposed to work, yet?

I tried loading bordeaux-fft on an Odroid U3 (linuxarm) and got this:

Welcome to Clozure Common Lisp Version 1.10-dev-r16104-trunk (LinuxARM32)!

? (ql:quickload "bordeaux-fft") To load "bordeaux-fft":

Load 1 ASDF system:

bordeaux-fft

; Loading "bordeaux-fft" [package bordeaux-fft]

Error: bad regspec: :COMPLEX-DOUBLE-FLOAT-VECTOR While executing: CCL::%HARD-REGSPEC-CLASS, in process listener(1). Type :POP to abort, :R for a list of available restarts. Type :? for other options.

The backtrace is attached.

I did some quick performance tests using the :lparallel library by replacing dotimes/mapcar by pdotimes/pmapcar in some raytracing programs. The results were correct and the speed-up on a quadcore Ubuntu Odroid U3 were plausible (about 2.5 times), however, the amount of memory allocated reported by the time macro was about 100-300 times LESS than the single thread original version. Perhaps only the memory allocated by the parent thread is counted in the statistics?