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76 lines
2.3 KiB
C
76 lines
2.3 KiB
C
/* libunwind - a platform-independent unwind library
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Copyright (C) 2004 Hewlett-Packard Co
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Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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int
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main (int argc, char **argv, char **envp)
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{
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char *program, **child_argv;
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struct timeval start, stop;
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double secs;
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int status, i;
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long count;
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pid_t pid;
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count = atol (argv[1]);
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program = argv[2];
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child_argv = alloca ((argc - 1) * sizeof (char *));
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for (i = 0; i < argc - 2; ++i)
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child_argv[i] = argv[2 + i];
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child_argv[i] = NULL;
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gettimeofday (&start, NULL);
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for (i = 0; i < count; ++i)
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{
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pid = fork ();
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if (pid == 0)
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{
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execve (program, child_argv, envp);
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_exit (-1);
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}
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else
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{
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waitpid (pid, &status, 0);
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if (!WIFEXITED (status) || WEXITSTATUS (status) != 0)
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{
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fprintf (stderr, "%s: child failed\n", argv[0]);
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exit (-1);
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}
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}
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}
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gettimeofday (&stop, NULL);
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secs = ((stop.tv_sec + 1e-6 * stop.tv_usec)
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- (start.tv_sec + 1e-6 * start.tv_usec));
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printf ("%lu nsec/execution\n",
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(unsigned long) (1e9 * secs / (double) count));
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return 0;
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}
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