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Diffstat (limited to 'tools/regression/environ/timings.c')
| -rw-r--r-- | tools/regression/environ/timings.c | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/tools/regression/environ/timings.c b/tools/regression/environ/timings.c new file mode 100644 index 000000000000..ac7dfcaa658f --- /dev/null +++ b/tools/regression/environ/timings.c @@ -0,0 +1,197 @@ +/*- + * Copyright (c) 2007 Sean C. Farley <scf@FreeBSD.org> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ +#include <sys/types.h> +#include <sys/time.h> +#include <sys/resource.h> +#include <err.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + + +#include <sys/cdefs.h> +const char value1[] = "Large ------------------ value"; +const char value2[] = "Small -- value"; +char nameValuePair[] = "less=more"; +const char name[] = "PATH"; +const char name2[] = "SHELL"; +const int MaxIterations = 1000000; +const char Tabs[] = "\t\t\t"; + + +static int +report_time(const char *action, struct timeval *startTime, + struct timeval *endTime) +{ + int actionLen; + int numTabs; + + actionLen = strlen(action); + numTabs = 3 - actionLen / 8; + + return (printf("Time spent executing %s:%.*s%f\n", action, numTabs, Tabs, + (endTime->tv_sec - startTime->tv_sec) + + (double)(endTime->tv_usec - startTime->tv_usec) / 1000000)); +} + + +int +main(int argc, char **argv) +{ + int iterations; + struct rusage endUsage; + struct rusage startUsage; + + /* + * getenv() on the existing environment. + */ + getrusage(RUSAGE_SELF, &startUsage); + + /* Iterate over setting variable. */ + for (iterations = 0; iterations < MaxIterations; iterations++) + if (getenv(name) == NULL) + err(EXIT_FAILURE, "getenv(name)"); + + getrusage(RUSAGE_SELF, &endUsage); + + report_time("getenv(name)", &startUsage.ru_utime, &endUsage.ru_utime); + + + /* + * setenv() a variable with a large value. + */ + getrusage(RUSAGE_SELF, &startUsage); + + /* Iterate over setting variable. */ + for (iterations = 0; iterations < MaxIterations; iterations++) + if (setenv(name, value1, 1) == -1) + err(EXIT_FAILURE, "setenv(name, value1, 1)"); + + getrusage(RUSAGE_SELF, &endUsage); + + report_time("setenv(name, value1, 1)", &startUsage.ru_utime, + &endUsage.ru_utime); + + + /* + * getenv() the new variable on the new environment. + */ + getrusage(RUSAGE_SELF, &startUsage); + + /* Iterate over setting variable. */ + for (iterations = 0; iterations < MaxIterations; iterations++) + /* Set large value to variable. */ + if (getenv(name) == NULL) + err(EXIT_FAILURE, "getenv(name)"); + + getrusage(RUSAGE_SELF, &endUsage); + + report_time("getenv(name)", &startUsage.ru_utime, &endUsage.ru_utime); + + + /* + * getenv() a different variable on the new environment. + */ + getrusage(RUSAGE_SELF, &startUsage); + + /* Iterate over setting variable. */ + for (iterations = 0; iterations < MaxIterations; iterations++) + /* Set large value to variable. */ + if (getenv(name2) == NULL) + err(EXIT_FAILURE, "getenv(name2)"); + + getrusage(RUSAGE_SELF, &endUsage); + + report_time("getenv(name2)", &startUsage.ru_utime, &endUsage.ru_utime); + + + /* + * setenv() a variable with a small value. + */ + getrusage(RUSAGE_SELF, &startUsage); + + /* Iterate over setting variable. */ + for (iterations = 0; iterations < MaxIterations; iterations++) + if (setenv(name, value2, 1) == -1) + err(EXIT_FAILURE, "setenv(name, value2, 1)"); + + getrusage(RUSAGE_SELF, &endUsage); + + report_time("setenv(name, value2, 1)", &startUsage.ru_utime, + &endUsage.ru_utime); + + + /* + * getenv() a different variable on the new environment. + */ + getrusage(RUSAGE_SELF, &startUsage); + + /* Iterate over setting variable. */ + for (iterations = 0; iterations < MaxIterations; iterations++) + /* Set large value to variable. */ + if (getenv(name2) == NULL) + err(EXIT_FAILURE, "getenv(name)"); + + getrusage(RUSAGE_SELF, &endUsage); + + report_time("getenv(name)", &startUsage.ru_utime, &endUsage.ru_utime); + + + /* + * getenv() a different variable on the new environment. + */ + getrusage(RUSAGE_SELF, &startUsage); + + /* Iterate over setting variable. */ + for (iterations = 0; iterations < MaxIterations; iterations++) + /* Set large value to variable. */ + if (getenv(name2) == NULL) + err(EXIT_FAILURE, "getenv(name2)"); + + getrusage(RUSAGE_SELF, &endUsage); + + report_time("getenv(name2)", &startUsage.ru_utime, &endUsage.ru_utime); + + + /* + * putenv() a variable with a small value. + */ + getrusage(RUSAGE_SELF, &startUsage); + + /* Iterate over setting variable. */ + for (iterations = 0; iterations < MaxIterations; iterations++) + if (putenv(nameValuePair) == -1) + err(EXIT_FAILURE, "putenv(nameValuePair)"); + + getrusage(RUSAGE_SELF, &endUsage); + + report_time("putenv(nameValuePair)", &startUsage.ru_utime, + &endUsage.ru_utime); + + + exit(EXIT_SUCCESS); +} |