diff options
Diffstat (limited to 'benchmarks')
| -rw-r--r-- | benchmarks/ChangeLog | 16 | ||||
| -rw-r--r-- | benchmarks/Makefile | 26 | ||||
| -rw-r--r-- | benchmarks/forks.c | 63 |
3 files changed, 105 insertions, 0 deletions
diff --git a/benchmarks/ChangeLog b/benchmarks/ChangeLog new file mode 100644 index 00000000..fb7b1a6f --- /dev/null +++ b/benchmarks/ChangeLog @@ -0,0 +1,16 @@ +1999-10-01 Roland McGrath <roland@baalperazim.frob.com> + + * forks.c: Add #include's to silence implicit decl warnings + (main): Use time_t and add a cast, to silence type warnings. + +1999-09-14 Thomas Bushnell, BSG <tb@mit.edu> + + * forks.c (main): Count argc correctly. + +Wed Apr 12 11:25:25 1995 Michael I Bushnell <mib@duality.gnu.ai.mit.edu> + + * Makefile (OBJS): New var. + +Tue Apr 11 11:17:32 1995 Michael I Bushnell <mib@duality.gnu.ai.mit.edu> + + * Makefile: Rewrote in accordance with new scheme. diff --git a/benchmarks/Makefile b/benchmarks/Makefile new file mode 100644 index 00000000..505aa5b8 --- /dev/null +++ b/benchmarks/Makefile @@ -0,0 +1,26 @@ +# +# Copyright (C) 1994, 1995 Free Software Foundation +# +# This program is free software; you can redistribute it and/or +# modify it under the terms of the GNU General Public License as +# published by the Free Software Foundation; either version 2, or (at +# your option) any later version. +# +# This program is distributed in the hope that it will be useful, but +# WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +# General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write to the Free Software +# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + +dir := benchmarks +makemode := utility + +SRCS = forks.c +OBJS = forks.o +target = forks + +include ../Makeconf + diff --git a/benchmarks/forks.c b/benchmarks/forks.c new file mode 100644 index 00000000..30f01f72 --- /dev/null +++ b/benchmarks/forks.c @@ -0,0 +1,63 @@ +/* From 4.4 BSD sys/tests/benchmarks/forks.c. */ + +#include <unistd.h> +#include <stdlib.h> +#include <stdio.h> +#include <time.h> +#include <sys/wait.h> + +/* + * Benchmark program to calculate fork+wait + * overhead (approximately). Process + * forks and exits while parent waits. + * The time to run this program is used + * in calculating exec overhead. + */ + +int +main(argc, argv) + char *argv[]; +{ + register int nforks, i; + char *cp; + int pid, child, status, brksize; + time_t starttime, endtime; + + if (argc < 3) { + printf("usage: %s number-of-forks sbrk-size\n", argv[0]); + exit(1); + } + nforks = atoi(argv[1]); + if (nforks < 0) { + printf("%s: bad number of forks\n", argv[1]); + exit(2); + } + brksize = atoi(argv[2]); + if (brksize < 0) { + printf("%s: bad size to sbrk\n", argv[2]); + exit(3); + } + + time (&starttime); + cp = (char *)sbrk(brksize); + if ((int)cp == -1) { + perror("sbrk"); + exit(4); + } + for (i = 0; i < brksize; i += 1024) + cp[i] = i; + while (nforks-- > 0) { + child = fork(); + if (child == -1) { + perror("fork"); + exit(-1); + } + if (child == 0) + _exit(-1); + while ((pid = wait(&status)) != -1 && pid != child) + ; + } + time (&endtime); + printf ("Time: %d seconds.\n", (int) (endtime - starttime)); + exit(0); +} |