Hi,
I have a small test program that tries to allocate 100Mb and then say hello:
;;;;;;;;;;;;;;;; start of malloc-test.lisp ;;;;;;;;;;;; (asdf:oos 'asdf:load-op :cffi) (defpackage :malloc-test (:use :common-lisp :cffi)) (in-package :malloc-test)
; Attempt to malloc 100Mb of memory and say hello (with-foreign-pointer (data (* 100 1048576 (foreign-type-size :char))) (print "hello")) ;;;;;;;;;;;;;;;; end of malloc-test.lisp ;;;;;;;;;;;;;
But when I run it using SBCL on Ubuntu 10.10 32bit, it complains about some value not being of type (MOD 536870909). Is this a deliberate limit on the part of CFFI or SBCL? If so where can I adjust this limit?
$ sbcl This is SBCL 1.0.40.0.debian, an implementation of ANSI Common Lisp. More information about SBCL is available at http://www.sbcl.org/.
SBCL is free software, provided as is, with absolutely no warranty. It is mostly in the public domain; some portions are provided under BSD-style licenses. See the CREDITS and COPYING files in the distribution for more information. * (load "malloc-test.lisp")
; loading system definition from /usr/share/common-lisp/systems/cffi.asd into ; #<PACKAGE "ASDF0"> ; registering #<SYSTEM CFFI {ADD22C1}> as CFFI ; loading system definition from /usr/share/common-lisp/systems/babel.asd into ; #<PACKAGE "ASDF0"> ; registering #<SYSTEM BABEL {B2CB081}> as BABEL ; loading system definition from /usr/share/common-lisp/systems/alexandria.asd ; into #<PACKAGE "ASDF0"> ; registering #<SYSTEM :ALEXANDRIA {B4AF1B1}> as ALEXANDRIA ; loading system definition from ; /usr/share/common-lisp/systems/trivial-features.asd into #<PACKAGE "ASDF0"> ; registering #<SYSTEM TRIVIAL-FEATURES {ABBB251}> as TRIVIAL-FEATURES
debugger invoked on a TYPE-ERROR in thread #<THREAD "initial thread" RUNNING {AACA871}>: The value 838860800 is not of type (MOD 536870909).
Type HELP for debugger help, or (SB-EXT:QUIT) to exit from SBCL.
restarts (invokable by number or by possibly-abbreviated name): 0: [ABORT] Exit debugger, returning to top level.
((LAMBDA ())) 0]
Thanks,
On Tue, Feb 8, 2011 at 5:51 AM, Carlo Hamalainen carlo.hamalainen@gmail.com wrote:
; Attempt to malloc 100Mb of memory and say hello (with-foreign-pointer (data (* 100 1048576 (foreign-type-size :char))) (print "hello"))
WITH-FOREIGN-POINTER expands to WITH-ALIEN on SBCL, which performs stack allocation.
But when I run it using SBCL on Ubuntu 10.10 32bit, it complains about some value not being of type (MOD 536870909). Is this a deliberate limit on the part of CFFI or SBCL? If so where can I adjust this limit?
It's an SBCL limit (64 MB?). I don't know if you can adjust it but someone on sbcl-devel should know. I'm surprised it's that big, though. Shouldn't it be much smaller?
On Wed, Feb 9, 2011 at 8:54 AM, Luís Oliveira luismbo@gmail.com wrote:
WITH-FOREIGN-POINTER expands to WITH-ALIEN on SBCL, which performs stack allocation.
Ah, thanks. It sounds like I want FOREIGN-ALLOC and FOREIGN-FREE instead.
It's an SBCL limit (64 MB?). I don't know if you can adjust it but someone on sbcl-devel should know. I'm surprised it's that big, though. Shouldn't it be much smaller?
Actually 536870909/1048576 is about 512Mb. Strange.
On Fri, Feb 25, 2011 at 4:29 AM, Carlo Hamalainen carlo.hamalainen@gmail.com wrote:
It's an SBCL limit (64 MB?). I don't know if you can adjust it but someone on sbcl-devel should know. I'm surprised it's that big, though. Shouldn't it be much smaller?
Actually 536870909/1048576 is about 512Mb. Strange.
IIRC that stack allocation limit is specified in bits, not bytes.
Cheers,
-
Carlo Hamalainen -
Luís Oliveira