Move 1988-2004 entries into subdirs
We we move 1988-2004 entries from all of a year's winning entries in a single directory to each winner being in their own sub-directory under the given year directory.
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Landon Curt Noll committed
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@@ -0,0 +1,116 @@
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static char Asm = 'm'
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;
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#include\
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<assert.h>
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typedef unsigned long LOGO
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;
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#include\
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<stdio.h>
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static void new (char *, LOGO)
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;
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#include\
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<stdlib.h>
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#define Pascal (void)printf
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#include\
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<unistd.h>
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static void new (char *Oberon
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, LOGO awk)
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{ Pascal ("%s to %calloc %luM+%luK+%lu bytes"
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, Oberon
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, Asm
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, awk >> (__LINE__ - 1)
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, (awk & 0xffc00) >> (1+sizeof __TIME__)
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, awk & 1023)
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; } typedef size_t BCPL
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; static BCPL far = 0
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, Lisp = ~(BCPL)0^(
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~ (BCPL)0>>1)
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;
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#define B\
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( C)case SIG##C\
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: (void)puts(\
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# C)\
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; break\
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;
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int main (int, char**)
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;
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#define Alloc switch (Asm) { case 'c'\
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: Basic = calloc (far\
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, 1)\
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; break\
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; default\
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: Basic = malloc (far)\
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; }
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#include\
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<time.h>
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static int inline(void)
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;
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#include\
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<float.h>
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int main (int F77
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, char **F90)
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{ switch (F90[--F77][0] == 'c') case 1
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: Asm += 'c' - Asm
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; switch (setbuf (stdout
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, 0)
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, fork()) { char *Basic
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; case -1
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: assert (0)
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; break
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; case 0
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: for (
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; far
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#include\
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<iso646.h>
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or_eq Lisp, Lisp not_eq 0
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; Lisp >>= 1) { new ("Trying"
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, (LOGO) far)
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; Alloc switch (Basic not_eq 0) { case 1
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: Pascal ("..YEP\n")
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; free (Basic)
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; break
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; default
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: Pascal ("..nope\n")
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; far and_eq compl Lisp
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; } } Alloc assert (Basic not_eq 0)
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; new ("Able"
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, (LOGO) far)
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; (void) putchar ('\n')
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; for (Lisp = 0
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; Lisp < far
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; Lisp += 1 << 10) { time_t COBOL = time (NULL)
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; Basic[Lisp] = '\a'
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; Pascal ("\r%lu kilo bytes ok "
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, (LOGO) (1 + (Lisp >> 10)))
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; switch (difftime (time (NULL)
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, COBOL) - 5 > FLT_EPSILON) { case 1
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: free (Basic)
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; return 1
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; } } free (Basic)
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; return 0
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; } return inline()
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; }
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#include\
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<signal.h>
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#include\
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<sys/wait.h>
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static int inline (void) { int PL1
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; switch ((void) wait (&PL1)
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, WIFSIGNALED (PL1)) { int Algol
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; default
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: Algol = WTERMSIG (PL1)
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; Pascal (" %calloc lied! Killed by SIG"
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, Asm)
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; switch (Algol) { B(KILL) B(SEGV) default
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: Pascal ("NAL %d\n"
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, Algol)
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; } break
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; case 0
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: WEXITSTATUS(PL1)==1
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? Pascal (" %calloc lied! Thr\aashing\n"
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, Asm)
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: Pascal ("no overcommit\n")
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; } re\
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turn PL1
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;
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}
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@@ -0,0 +1,165 @@
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Best Utility:
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Jens Schweikhardt
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DFN Network Operation Center
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Schlartaeckerweg 3 (home address)
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D-71384 Weinstadt
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Germany
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http://www.uni-stuttgart.de/People/schweikhardt/home.html
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Judges' comments:
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To use:
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make schweikh3
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WARNING!
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Do not run this program without reading this text down to the end.
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It may render your system unusable for a limited amount of time
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or force you to reboot using the Big Red Button! This is not a joke.
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You have been warned.
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The source fails to compile on compilers that recognize the inline
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keyword by default. For gcc, you may need to use -ansi.
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See the file, schweikh3.info for example output from various systems.
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But still it is a useful utility. To use try:
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./schweikh3
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and thanks for the virtual memories! :-)
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NOTE: On some systems such as SunOS, one may need to compile with:
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${CC} ${CFLAGS} \
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-I. -D_POSIX_SOURCE '-Ddifftime(a,b)=(double)(b-a)' \
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schweikh3.c -o schweikh3
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Selected notes from the author:
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Why I think my entry is obfuscated
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----------------------------------
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There are some layout obfuscations that hinder readability, like
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some (but not all) one character tokens in column 1. Includes,
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defines and declarations of data and functions appear intermixed.
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iso646.h is even included in the middle of an expression, how
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disgusting. Besides, requiring iso646.h will render the program
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uncompilable on many systems that have not yet incorporated
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Amendment One to The Standard. If you, dear reader, suffer from
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this disease, just read iso646.h.
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There are no `if' statements. They have been replaced by
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"switch () case 1:" or "switch () case 0:" etc. At least one
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switch has a declaration after the opening brace, booh!
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Identifiers are named after random programming languages, Basic,
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Cobol, F77, awk etc.
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You have to select maximum ANSI C conformance of your
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compiler. The source fails to compile under a C++ compiler due to
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the `new' identifier which is a C++ reserved word:
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$ g++ prog.c
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prog.c:9: parse error before `new'
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prog.c:16: parse error before `new'
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prog.c:46: parse error before `void'
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prog.c:65: parse error before `Lisp'
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prog.c:68: parse error before `;'
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[...]
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prog.c:91: confused by earlier errors, bailing out
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The source fails to compile on compilers that recognize the inline
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keyword by default, e.g. gcc:
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$ gcc prog.c
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prog.c:46: parse error before `void'
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prog.c: In function `main':
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prog.c:91: parse error before `inline'
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prog.c: At top level:
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prog.c:97: parse error before `void'
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The -ansi option to gcc fixes this.
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The source fails to compile on obsolete systems with obsolete
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memory models due to the identifier `far' (to be honest: this is
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untested :-).
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Does your indent cope with backslash/newline pairs inbetween
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keywords like in "re\<newline>turn"? Solaris' indent inserts spaces
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and thereby renders the source uncompilable...
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The indented source will exhibit different semantics when indenting
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changes the number of lines (due to using the __LINE__ macro in an
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expression).
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And what about sizeof __TIME__? This one's for the philosophers
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and physicists among us programmers. What is it? sizeof (char *) -- no.
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Strlen ("hh:mm:ss")? -- no. It's the same as sizeof __DATE__ -
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sizeof "no" :-)
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The program is POSIX conformant and lints without warning under
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Solaris' Sunpro lint. Allocated memory is correctly freed on all
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possible execution paths.
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What this program does
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----------------------
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This program tests your operating system's allocation honesty. It
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forks a child that will allocate as much as possible with byte
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granularity and then write to every 1024th byte, at the same time
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writing a status report on stdout. This way each page of the
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allocated virtual memory will eventually be referenced. Without
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any arguments, malloc() will be used to allocate memory. If the
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first arg starts with c, calloc() will be used instead.
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I distinguish three different behaviours:
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1) OS without memory overcommit:
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malloc does not lie -- you can use all memory the OS granted to you.
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2) OS with memory overcommit:
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malloc lies -- any program may get killed at random when the
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OS can not acquire a free page.
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3) OS with pseudo memory overcommit:
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malloc lies -- The OS puts processes to sleep for which it can
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not acquire a free page. Because other processes are also
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affected this way, the system slows down and quickly becomes
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totally unusable (also known as "thrashing"). Because more and
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more processes wait for memory returned by other exiting processes
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the system eventually enters a deadlock situation and effectively
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halts.
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I had the pleasure and pain to find all three behaviours on the
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platforms I use regularly. What follows are the outputs for
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Solaris, FreeBSD and Linux. The Linux case is interesting in that
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the behaviour changes when calloc is used instead of malloc.
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For FreeBSD, the last two lines are not messages stemming from
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my program but issued by the syslog daemon.
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Implementation remarks
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----------------------
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How can we distinguish the three different OS types from the
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table above?
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Obviously, type 1), no overcommit, is easy.
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For type 2), random kill, we need to fork a child that can be killed
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and whose exit status the parent collects and decodes. Here's
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where POSIX enters the scene.
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Type 3), thrashing, was the hardest part. The first attempt was to
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measure the elapsed processor time it takes to write a single byte
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(using clock()). If a certain threshold is reached I assume the
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system is thrashing. When thrashing, however, the process does not
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consume processor time in a noticeable amount any longer and I lose.
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So I switched to measuring wall clock time using time(). On the one
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system that I observe thrashing (Linux) this works (although the
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value returned by time seems to 'hang' sometimes when the OS thrashes.
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Exceeding a threshold of 5 seconds may be detected only after half a
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minute or so.
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@@ -0,0 +1,171 @@
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***** SOLARIS 2.5 (sparc):
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% prog
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Trying to malloc 2048M+0K+0 bytes..nope
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Trying to malloc 1024M+0K+0 bytes..nope
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||||
Trying to malloc 512M+0K+0 bytes..nope
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||||
Trying to malloc 256M+0K+0 bytes..nope
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||||
Trying to malloc 128M+0K+0 bytes..YEP
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Trying to malloc 192M+0K+0 bytes..nope
|
||||
Trying to malloc 160M+0K+0 bytes..YEP
|
||||
Trying to malloc 176M+0K+0 bytes..nope
|
||||
Trying to malloc 168M+0K+0 bytes..YEP
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||||
Trying to malloc 172M+0K+0 bytes..nope
|
||||
Trying to malloc 170M+0K+0 bytes..YEP
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Trying to malloc 171M+0K+0 bytes..YEP
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Trying to malloc 171M+512K+0 bytes..YEP
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Trying to malloc 171M+768K+0 bytes..nope
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Trying to malloc 171M+640K+0 bytes..nope
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Trying to malloc 171M+576K+0 bytes..YEP
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Trying to malloc 171M+608K+0 bytes..YEP
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Trying to malloc 171M+624K+0 bytes..nope
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Trying to malloc 171M+616K+0 bytes..nope
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Trying to malloc 171M+612K+0 bytes..YEP
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Trying to malloc 171M+614K+0 bytes..YEP
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Trying to malloc 171M+615K+0 bytes..YEP
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Trying to malloc 171M+615K+512 bytes..YEP
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Trying to malloc 171M+615K+768 bytes..YEP
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Trying to malloc 171M+615K+896 bytes..YEP
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Trying to malloc 171M+615K+960 bytes..YEP
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Trying to malloc 171M+615K+992 bytes..YEP
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Trying to malloc 171M+615K+1008 bytes..YEP
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Trying to malloc 171M+615K+1016 bytes..nope
|
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Trying to malloc 171M+615K+1012 bytes..nope
|
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Trying to malloc 171M+615K+1010 bytes..nope
|
||||
Trying to malloc 171M+615K+1009 bytes..nope
|
||||
Able to malloc 171M+615K+1008 bytes
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1 kilo bytes ok
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2 kilo bytes ok
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||||
...
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175719 kilo bytes ok no overcommit
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***** FreeBSD 2.1 (i386):
|
||||
|
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% prog
|
||||
Trying to malloc 2048M+0K+0 bytes..nope
|
||||
Trying to malloc 1024M+0K+0 bytes..nope
|
||||
Trying to malloc 512M+0K+0 bytes..nope
|
||||
Trying to malloc 256M+0K+0 bytes..nope
|
||||
Trying to malloc 128M+0K+0 bytes..nope
|
||||
Trying to malloc 64M+0K+0 bytes..nope
|
||||
Trying to malloc 32M+0K+0 bytes..YEP
|
||||
Trying to malloc 48M+0K+0 bytes..nope
|
||||
Trying to malloc 40M+0K+0 bytes..nope
|
||||
Trying to malloc 36M+0K+0 bytes..nope
|
||||
Trying to malloc 34M+0K+0 bytes..nope
|
||||
Trying to malloc 33M+0K+0 bytes..nope
|
||||
Trying to malloc 32M+512K+0 bytes..nope
|
||||
Trying to malloc 32M+256K+0 bytes..nope
|
||||
Trying to malloc 32M+128K+0 bytes..nope
|
||||
Trying to malloc 32M+64K+0 bytes..nope
|
||||
Trying to malloc 32M+32K+0 bytes..nope
|
||||
Trying to malloc 32M+16K+0 bytes..nope
|
||||
Trying to malloc 32M+8K+0 bytes..nope
|
||||
Trying to malloc 32M+4K+0 bytes..nope
|
||||
Trying to malloc 32M+2K+0 bytes..YEP
|
||||
Trying to malloc 32M+3K+0 bytes..YEP
|
||||
Trying to malloc 32M+3K+512 bytes..YEP
|
||||
Trying to malloc 32M+3K+768 bytes..YEP
|
||||
Trying to malloc 32M+3K+896 bytes..YEP
|
||||
Trying to malloc 32M+3K+960 bytes..YEP
|
||||
Trying to malloc 32M+3K+992 bytes..YEP
|
||||
Trying to malloc 32M+3K+1008 bytes..YEP
|
||||
Trying to malloc 32M+3K+1016 bytes..YEP
|
||||
Trying to malloc 32M+3K+1020 bytes..YEP
|
||||
Trying to malloc 32M+3K+1022 bytes..nope
|
||||
Trying to malloc 32M+3K+1021 bytes..nope
|
||||
Able to malloc 32M+3K+1020 bytes
|
||||
1 kilo bytes ok
|
||||
...
|
||||
21668 kilo bytes ok
|
||||
malloc lied! Killed by SIGKILL
|
||||
Nov 24 18:11:56 /kernel: swap_pager: out of space
|
||||
Nov 24 18:11:57 /kernel: Process 5 killed by vm_fault -- out of swap
|
||||
|
||||
% prog c
|
||||
Trying to calloc 2048M+0K+0 bytes..nope
|
||||
Trying to calloc 1024M+0K+0 bytes..nope
|
||||
Trying to calloc 512M+0K+0 bytes..nope
|
||||
Trying to calloc 256M+0K+0 bytes..nope
|
||||
Trying to calloc 128M+0K+0 bytes..nope
|
||||
Trying to calloc 64M+0K+0 bytes..nope
|
||||
Trying to calloc 32M+0K+0 bytes
|
||||
calloc lied! Killed by SIGKILL
|
||||
Nov 24 18:14:54 /kernel: swap_pager: out of space
|
||||
Nov 24 18:14:55 /kernel: Process 7 killed by vm_fault -- out of swap
|
||||
|
||||
***** Linux 1.2.13 (i386):
|
||||
|
||||
% prog
|
||||
Trying to malloc 2048M+0K+0 bytes..nope
|
||||
Trying to malloc 1024M+0K+0 bytes..nope
|
||||
Trying to malloc 512M+0K+0 bytes..nope
|
||||
Trying to malloc 256M+0K+0 bytes..nope
|
||||
Trying to malloc 128M+0K+0 bytes..nope
|
||||
Trying to malloc 64M+0K+0 bytes..nope
|
||||
Trying to malloc 32M+0K+0 bytes..nope
|
||||
Trying to malloc 16M+0K+0 bytes..YEP
|
||||
Trying to malloc 24M+0K+0 bytes..nope
|
||||
Trying to malloc 20M+0K+0 bytes..YEP
|
||||
Trying to malloc 22M+0K+0 bytes..YEP
|
||||
Trying to malloc 23M+0K+0 bytes..YEP
|
||||
Trying to malloc 23M+512K+0 bytes..YEP
|
||||
Trying to malloc 23M+768K+0 bytes..YEP
|
||||
Trying to malloc 23M+896K+0 bytes..YEP
|
||||
Trying to malloc 23M+960K+0 bytes..YEP
|
||||
Trying to malloc 23M+992K+0 bytes..YEP
|
||||
Trying to malloc 23M+1008K+0 bytes..YEP
|
||||
Trying to malloc 23M+1016K+0 bytes..YEP
|
||||
Trying to malloc 23M+1020K+0 bytes..YEP
|
||||
Trying to malloc 23M+1022K+0 bytes..YEP
|
||||
Trying to malloc 23M+1023K+0 bytes..YEP
|
||||
Trying to malloc 23M+1023K+512 bytes..YEP
|
||||
Trying to malloc 23M+1023K+768 bytes..YEP
|
||||
Trying to malloc 23M+1023K+896 bytes..YEP
|
||||
Trying to malloc 23M+1023K+960 bytes..YEP
|
||||
Trying to malloc 23M+1023K+992 bytes..YEP
|
||||
Trying to malloc 23M+1023K+1008 bytes..YEP
|
||||
Trying to malloc 23M+1023K+1016 bytes..YEP
|
||||
Trying to malloc 23M+1023K+1020 bytes..YEP
|
||||
Trying to malloc 23M+1023K+1022 bytes..YEP
|
||||
Trying to malloc 23M+1023K+1023 bytes..YEP
|
||||
Able to malloc 23M+1023K+1023 bytes
|
||||
23294 kilo bytes ok malloc lied! Thrashing
|
||||
|
||||
% prog c
|
||||
Trying to calloc 2048M+0K+0 bytes..nope
|
||||
Trying to calloc 1024M+0K+0 bytes..nope
|
||||
Trying to calloc 512M+0K+0 bytes..nope
|
||||
Trying to calloc 256M+0K+0 bytes..nope
|
||||
Trying to calloc 128M+0K+0 bytes..nope
|
||||
Trying to calloc 64M+0K+0 bytes..nope
|
||||
Trying to calloc 32M+0K+0 bytes..nope
|
||||
Trying to calloc 16M+0K+0 bytes..YEP
|
||||
Trying to calloc 24M+0K+0 bytes..nope
|
||||
Trying to calloc 20M+0K+0 bytes..nope
|
||||
Trying to calloc 18M+0K+0 bytes..nope
|
||||
Trying to calloc 17M+0K+0 bytes..nope
|
||||
Trying to calloc 16M+512K+0 bytes..nope
|
||||
Trying to calloc 16M+256K+0 bytes..nope
|
||||
Trying to calloc 16M+128K+0 bytes..nope
|
||||
Trying to calloc 16M+64K+0 bytes..nope
|
||||
Trying to calloc 16M+32K+0 bytes..nope
|
||||
Trying to calloc 16M+16K+0 bytes..nope
|
||||
Trying to calloc 16M+8K+0 bytes..YEP
|
||||
Trying to calloc 16M+12K+0 bytes..YEP
|
||||
Trying to calloc 16M+14K+0 bytes..nope
|
||||
Trying to calloc 16M+13K+0 bytes..nope
|
||||
Trying to calloc 16M+12K+512 bytes..nope
|
||||
Trying to calloc 16M+12K+256 bytes..nope
|
||||
Trying to calloc 16M+12K+128 bytes..nope
|
||||
Trying to calloc 16M+12K+64 bytes..nope
|
||||
Trying to calloc 16M+12K+32 bytes..nope
|
||||
Trying to calloc 16M+12K+16 bytes..nope
|
||||
Trying to calloc 16M+12K+8 bytes..nope
|
||||
Trying to calloc 16M+12K+4 bytes..nope
|
||||
Trying to calloc 16M+12K+2 bytes..nope
|
||||
Trying to calloc 16M+12K+1 bytes..nope
|
||||
Able to calloc 16M+12K+0 bytes
|
||||
1 kilo bytes ok
|
||||
...
|
||||
16396 kilo bytes ok no overcommit
|
||||
Reference in new issue
Block a user