[racket-dev] check syntax now more likely to work on std libs
I've just pushed a change that makes check syntax more likely to run on files in the plt tree. Specifically, the namespace that check syntax creates no longer shares the GUI libraries which means it pulls in a far smaller set of libraries overall. (Of course, run still pulls those in, so running those files will continue to not work.) This kind of change can lead to surprising bugs so if you see check syntax failing in strange ways, please let me know. Thanks, Robby _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
[racket-dev] internal definitions stepper
How recently did the change come in that allows internal definitions all over the place? And how broken did this make the stepper? (Ie is it feasible to wait for the next release? and should we?) Robby On Tue, Oct 19, 2010 at 5:03 AM, sper...@racket-lang.org wrote: sperber has updated `master' from ddca8cd29b to fd5e9d4d63. http://git.racket-lang.org/plt/ddca8cd29b..fd5e9d4d63 =[ 1 Commits ]== Directory summary: 100.0% collects/test-engine/ ~~ fd5e9d4 Mike Sperber sper...@deinprogramm.de 2010-10-19 11:56:24 +0200 : | Unbreak the stepper on `check-expect'. | | All kinds of things expand into (let () ...), so all kinds of things | break. : M collects/test-engine/racket-tests.rkt | 2 +- =[ Overall Diff ]=== collects/test-engine/racket-tests.rkt ~ --- OLD/collects/test-engine/racket-tests.rkt +++ NEW/collects/test-engine/racket-tests.rkt @@ -106,7 +106,7 @@ #'test-engine 'stepper-skipto (append skipto/third ;; let - skipto/third skipto/second ;; unless (it expands into a begin) + skipto/third skipto/third ;; unless (it expands into (if (let-values () ...)) skipto/cdr skipto/third ;; application of insert-test '(syntax-e cdr cdr syntax-e car) ;; lambda ))) _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
Re: [racket-dev] expected timing difference between fft-complex-forward and fft-complex-radix2-forward?
On my laptop: #lang racket (require fft.rkt) (define v (build-vector 16384 (lambda (i) (random (define v1 (vector-copy v)) (collect-garbage) (collect-garbage) (collect-garbage) (time (fft-complex-radix2-forward v1)) (define v2 (vector-copy v)) (collect-garbage) (collect-garbage) (collect-garbage) (time (fft-complex-forward v2)) (for/and ([i (in-range (vector-length v))]) ( (magnitude (- (vector-ref v1 i) (vector-ref v2 i))) 1e-4)) == cpu time: 94 real time: 94 gc time: 0 cpu time: 79 real time: 78 gc time: 0 #t I'll look at the rsound/fft implementation and see if I see the problem. On Mon, Oct 18, 2010 at 10:32 PM, John Clements cleme...@brinckerhoff.orgwrote: On Oct 18, 2010, at 9:25 AM, Doug Williams wrote: When I first ran with vectors of 8192, I got exactly the opposite - the radix-2 version was much slower (although still 500ms). But, when I looked, the longer time was almost exclusively GC - it just happen to hit that particular call. When I put a (collect-garbage) before each call, they were all 50ms on my machine. So, the GC penalty is likely what you're seeing. The other thing is to make sure you aren't calling one of the dft routines instead of the fft routines. Those are the only ones that get anywhere near 24s on my machine - they are about 20s on my machine. The dft routines are the 'straight' mathematical discrete Fourier transform and do not use the FFT algorithms at all. [They're really only useful for a sanity check on results.] Right, got it. No, the times I'm seeing are not GC. I bumped it up to an 8192-point fft, and now the radix-2 version is about 400x faster. Here's my code: #lang racket (require (planet clements/rsound/fft)) (define v (build-vector 16384 (lambda (i) (random (define v1 (vector-copy v)) (collect-garbage) (collect-garbage) (collect-garbage) (time (fft-complex-radix2-forward v1)) (define v2 (vector-copy v)) (collect-garbage) (collect-garbage) (collect-garbage) (time (fft-complex-forward v2)) (for/and ([i (in-range (vector-length v))]) ( (magnitude (- (vector-ref v1 i) (vector-ref v2 i))) 1e-4)) = cpu time: 208 real time: 211 gc time: 0 cpu time: 81357 real time: 82502 gc time: 8337 #t John Clements On Thu, Oct 14, 2010 at 4:34 PM, John Clements cleme...@brinckerhoff.org wrote: On a vector of length 8192 (a power of 2, natch), fft-complex-radix2-forward takes about 1/8 of a second (lost in the noise, essentially), but fft-complex-forward takes more than 24 seconds, a difference of about 200x. They do produce the same answers, up to differences of 1e-4 in the magnitude (didn't check the phase). 1) Is this expected? I thought the non-radix2 one was still fairly clever about subdividing when the number of points is divisible by 2. 2) If so, would it make sense to test for powers of 2? John Clements _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
Re: [racket-dev] internal definitions stepper
Robby Findler ro...@eecs.northwestern.edu writes: How recently did the change come in that allows internal definitions all over the place? And how broken did this make the stepper? Pretty broken: There are now (let () ...)s all over the place. (I've sent separate e-mail to John and Matthew.) -- Cheers =8-} Mike Friede, Völkerverständigung und überhaupt blabla _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
Re: [racket-dev] expected timing difference between fft-complex-forward and fft-complex-radix2-forward?
On Oct 19, 2010, at 5:17 AM, Doug Williams wrote: On my laptop: #lang racket (require fft.rkt) (define v (build-vector 16384 (lambda (i) (random (define v1 (vector-copy v)) (collect-garbage) (collect-garbage) (collect-garbage) (time (fft-complex-radix2-forward v1)) (define v2 (vector-copy v)) (collect-garbage) (collect-garbage) (collect-garbage) (time (fft-complex-forward v2)) (for/and ([i (in-range (vector-length v))]) ( (magnitude (- (vector-ref v1 i) (vector-ref v2 i))) 1e-4)) == cpu time: 94 real time: 94 gc time: 0 cpu time: 79 real time: 78 gc time: 0 #t I'll look at the rsound/fft implementation and see if I see the problem. It certainly sounds as though I broke it, or it changed after I got it. Has the source changed since you sent it to me last year? John smime.p7s Description: S/MIME cryptographic signature _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
[racket-dev] --enable-macprefix gone?
Has the --enable-macprefix option been removed from the configure script? When I configure, I get: configure: WARNING: unrecognized options: --enable-macprefix If so, the src/README file should be updated to reflect the change. David _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
[racket-dev] shared and names
Is there any way for shared to check for whether a name was originally assigned to an LHS and, if so, to re-use it? If I define (define cities (shared ([PVD (make-city ... (list BOS ORD))] [BOS ...] [ORD ...]) PVD)) and it prints as (shared ((-0- (make-city Providence (list -3- -7-))) (-11- (make-city Boston (list -3- -7- -16- -31-))) ... it's really pretty hard to read! (What's worse is that changes to the program change the assignment of -1-, -2-, etc., so even if I spent some time memorizing that -1- is PVD, -11- is ORD, etc., after I make a small change to my program, that memorized map is useless.) Shriram _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
Re: [racket-dev] shared and names
I think that we'd have to add names to structs to do that. Seems expensive. But maybe there is a better way? Robby On Tue, Oct 19, 2010 at 2:38 PM, Shriram Krishnamurthi s...@cs.brown.edu wrote: Is there any way for shared to check for whether a name was originally assigned to an LHS and, if so, to re-use it? If I define (define cities (shared ([PVD (make-city ... (list BOS ORD))] [BOS ...] [ORD ...]) PVD)) and it prints as (shared ((-0- (make-city Providence (list -3- -7-))) (-11- (make-city Boston (list -3- -7- -16- -31-))) ... it's really pretty hard to read! (What's worse is that changes to the program change the assignment of -1-, -2-, etc., so even if I spent some time memorizing that -1- is PVD, -11- is ORD, etc., after I make a small change to my program, that memorized map is useless.) Shriram _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
[racket-dev] fuzz testing the bytecode reader
Earlier today, I wrote a simple fuzz tester for bytecode reading and evaluation. The code is attached. It takes an existing zo file, reads it in as bytes, randomly flips some small portion of the bits (0.1%), and then `read's and `eval's the results. This extremely quickly finds segfaults in Racket. Here's a deterministic segfault with git HEAD: [sa...@hermes:~/tmp] racket fuzz.rkt -s 1046626898 -f ~/sw/plt/collects/redex/tests/compiled/lw-test-util_rkt.zo DrDr Ignore! random-seed 1046626898 name: /home/samth/sw/plt/collects/redex/tests/compiled/lw-test-util_rkt.zo SIGSEGV MAPERR si_code 1 fault on addr 0x616ec898 Aborted Here's how to traverse a bunch of files to find a segfault: racket fuzz.rkt -d ~/sw/plt/collects/redex/ I'll be adding this to the tree in the stress tests soon. Thanks to Robby for advice on the code, and to Lars Hansen for the idea. -- sam th sa...@ccs.neu.edu fuzz.rkt Description: Binary data _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
Re: [racket-dev] fuzz testing the bytecode reader
Caveat Emptor: be wary of running code designed to produce random, unsafe results if the computer you are running it on has any data you really care about. Chances of catastrophic failure *should* be low, but they may not be, and sometimes lightning does strike anyway. Carl Eastlund On Tue, Oct 19, 2010 at 4:42 PM, Sam Tobin-Hochstadt sa...@ccs.neu.edu wrote: Earlier today, I wrote a simple fuzz tester for bytecode reading and evaluation. The code is attached. It takes an existing zo file, reads it in as bytes, randomly flips some small portion of the bits (0.1%), and then `read's and `eval's the results. This extremely quickly finds segfaults in Racket. Here's a deterministic segfault with git HEAD: [sa...@hermes:~/tmp] racket fuzz.rkt -s 1046626898 -f ~/sw/plt/collects/redex/tests/compiled/lw-test-util_rkt.zo DrDr Ignore! random-seed 1046626898 name: /home/samth/sw/plt/collects/redex/tests/compiled/lw-test-util_rkt.zo SIGSEGV MAPERR si_code 1 fault on addr 0x616ec898 Aborted Here's how to traverse a bunch of files to find a segfault: racket fuzz.rkt -d ~/sw/plt/collects/redex/ I'll be adding this to the tree in the stress tests soon. Thanks to Robby for advice on the code, and to Lars Hansen for the idea. -- sam th sa...@ccs.neu.edu _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
Re: [racket-dev] internal definitions stepper
On Oct 19, 2010, at 10:02 AM, John Clements wrote: 2) The interactive tests fail like this: given: #(struct:error-result namespace-variable-value: test~object is not defined) I haven't worked on this one yet... but it looks like this is also something that was added this month. Per a discussion with Robby, it turns out to be *apparently* sufficient to define a binding in the testing namespace that associates test~object with #f. Kathy, can you confirm that the test-engine code is always happy with a value of #f for test~object? John smime.p7s Description: S/MIME cryptographic signature _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
[racket-dev] Grr... why can't I pull?
Okay, this just sounds stupid: my 'git fetch' is failing on the PLT tree. I can ssh to the pltgit machine just fine: john-clementss-macbook-pro:~/git-clements clements$ ssh git PTY allocation request failed on channel 0 hello clements, the gitolite version here is v1.4-14-g36317c4 the gitolite config gives you the following access: C CREATER/.* R W iplt R W play R W plt @ @ testing Connection to git.racket-lang.org closed. ... but git pull just hangs. I get no useful info, even with a git fetch -v. Actually, I just tried it from a remote linode (li21-127.members.linode.com), and it seems to be hanging there, as well. Am I doing something stupid, here? John smime.p7s Description: S/MIME cryptographic signature _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
Re: [racket-dev] fuzz testing the bytecode reader
I hope it doesn't delete DrDr's hard drive. Jay On Tue, Oct 19, 2010 at 1:51 PM, Carl Eastlund c...@ccs.neu.edu wrote: Caveat Emptor: be wary of running code designed to produce random, unsafe results if the computer you are running it on has any data you really care about. Chances of catastrophic failure *should* be low, but they may not be, and sometimes lightning does strike anyway. Carl Eastlund On Tue, Oct 19, 2010 at 4:42 PM, Sam Tobin-Hochstadt sa...@ccs.neu.edu wrote: Earlier today, I wrote a simple fuzz tester for bytecode reading and evaluation. The code is attached. It takes an existing zo file, reads it in as bytes, randomly flips some small portion of the bits (0.1%), and then `read's and `eval's the results. This extremely quickly finds segfaults in Racket. Here's a deterministic segfault with git HEAD: [sa...@hermes:~/tmp] racket fuzz.rkt -s 1046626898 -f ~/sw/plt/collects/redex/tests/compiled/lw-test-util_rkt.zo DrDr Ignore! random-seed 1046626898 name: /home/samth/sw/plt/collects/redex/tests/compiled/lw-test-util_rkt.zo SIGSEGV MAPERR si_code 1 fault on addr 0x616ec898 Aborted Here's how to traverse a bunch of files to find a segfault: racket fuzz.rkt -d ~/sw/plt/collects/redex/ I'll be adding this to the tree in the stress tests soon. Thanks to Robby for advice on the code, and to Lars Hansen for the idea. -- sam th sa...@ccs.neu.edu _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev -- Jay McCarthy j...@cs.byu.edu Assistant Professor / Brigham Young University http://teammccarthy.org/jay The glory of God is Intelligence - DC 93 _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
Re: [racket-dev] Grr... why can't I pull?
On Tue, Oct 19, 2010 at 2:28 PM, John Clements cleme...@brinckerhoff.org wrote: Am I doing something stupid, here? I'm having the same problem, and I'm at the same conference as John, so I suspect that's the issue. I can pull fine from my machine at Northeastern. -- sam th sa...@ccs.neu.edu _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
Re: [racket-dev] internal definitions stepper
Okay, here's what seems to be broken: 1) cond, as Mike observed. This is related to the different expansion of cond. 2) make-foo, where foo is a user-defined structure. There's a mysterious extra false that's showing up. 3) reduction of (cons 1 (cons 2 empty)) in beginner only. 4) local structures. Apparently, all of this (except for #4) changed in the last week :). John smime.p7s Description: S/MIME cryptographic signature _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
Re: [racket-dev] Grr... why can't I pull?
Four hours ago, John Clements wrote: Okay, this just sounds stupid: my 'git fetch' is failing on the PLT tree. I can ssh to the pltgit machine just fine: john-clementss-macbook-pro:~/git-clements clements$ ssh git PTY allocation request failed on channel 0 hello clements, the gitolite version here is v1.4-14-g36317c4 the gitolite config gives you the following access: CCREATER/.* R Wiplt R Wplay R Wplt @ @testing Connection to git.racket-lang.org closed. ... but git pull just hangs. I get no useful info, even with a git fetch -v. I forgot to say that the first thing is small enough that you get everything happenning withing a negligible delta of the ssh handshake step. But a pull is where it starts talking, and that would be much more sensitive to timouts etc. -- ((lambda (x) (x x)) (lambda (x) (x x))) Eli Barzilay: http://barzilay.org/ Maze is Life! _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
Re: [racket-dev] --enable-macprefix gone?
On 10/19/10 10:03 PM, Eli Barzilay wrote: 9 hours ago, David Van Horn wrote: Has the --enable-macprefix option been removed from the configure script? When I configure, I get: configure: WARNING: unrecognized options: --enable-macprefix If so, the src/README file should be updated to reflect the change. You should have this code in the configure script: Yep -- the code's there, and if I omit the option the script gives an error saying it's needed in order to use --prefix. So why do I see an unrecognized option warning when I provide --enable-macprefix? David _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
Re: [racket-dev] --enable-macprefix gone?
Four minutes ago, David Van Horn wrote: On 10/19/10 10:03 PM, Eli Barzilay wrote: 9 hours ago, David Van Horn wrote: Has the --enable-macprefix option been removed from the configure script? When I configure, I get: configure: WARNING: unrecognized options: --enable-macprefix If so, the src/README file should be updated to reflect the change. You should have this code in the configure script: Yep -- the code's there, and if I omit the option the script gives an error saying it's needed in order to use --prefix. So why do I see an unrecognized option warning when I provide --enable-macprefix? I just tried it, and it worked fine: $ ./configure --enable-macprefix --prefix=/foo/bar ... What's the command line that you're using? -- ((lambda (x) (x x)) (lambda (x) (x x))) Eli Barzilay: http://barzilay.org/ Maze is Life! _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
Re: [racket-dev] --enable-macprefix gone?
About a minute ago, David Van Horn wrote: On 10/19/10 10:03 PM, Eli Barzilay wrote: 9 hours ago, David Van Horn wrote: Has the --enable-macprefix option been removed from the configure script? When I configure, I get: configure: WARNING: unrecognized options: --enable-macprefix If so, the src/README file should be updated to reflect the change. You should have this code in the configure script: Yep -- the code's there, and if I omit the option the script gives an error saying it's needed in order to use --prefix. So why do I see an unrecognized option warning when I provide --enable-macprefix? All options are passed to sub-configure script calls -- you'll see similar warnings with other flags. I don't know if there's a way to disable passing specific arguments this way. -- ((lambda (x) (x x)) (lambda (x) (x x))) Eli Barzilay: http://barzilay.org/ Maze is Life! _ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev
