On Fri, 2008-11-21 at 17:25 +0530, [EMAIL PROTECTED] wrote:
> plain text document attachment
> (add-default-task-support-binary-for-9-10-test.patch)
> This patch adds a binary which will be running as a default task for testcases
> 9 and 10 to create an ideal scenario.
>
> Signed-off-by: Sudhir Kumar <[EMAIL PROTECTED]>
Thanks.
Regards--
Subrata
>
> ---
> testcases/kernel/controllers/cpuctl/cpuctl_def_task04.c | 250
> ++++++++++++++++
> 1 file changed, 250 insertions(+)
>
> Index:
> ltp-full-20081031/testcases/kernel/controllers/cpuctl/cpuctl_def_task04.c
> ===================================================================
> --- /dev/null
> +++ ltp-full-20081031/testcases/kernel/controllers/cpuctl/cpuctl_def_task04.c
> @@ -0,0 +1,250 @@
> +/******************************************************************************/
> +/*
> */
> +/* Copyright (c) International Business Machines Corp., 2007
> */
> +/*
> */
> +/* 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 of the License, 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
> */
> +/*
> */
> +/******************************************************************************/
> +
> +/******************************************************************************/
> +/*
> */
> +/* File: cpuctl_task_def04.c
> */
> +/*
> */
> +/* Description: This is a c program that runs as a default task in a default
> */
> +/* group to create an ideal scenario. In this default group all
> */
> +/* the system tasks will be running along with this spinning
> task*/
> +/* The file is to be used by tests 9-10.
> */
> +/*
> */
> +/* Total Tests: 2
> */
> +/*
> */
> +/* Test 09: Heavy stress test with nice value change
> */
> +/* Test 10: Heavy stress test (effect of heavy group on light group)
> */
> +/*
> */
> +/* Test Name: cpu_controller_test 9,10
> */
> +/*
> */
> +/* Test Assertion
> */
> +/* Please refer to the file cpuctl_testplan.txt
> */
> +/*
> */
> +/* Author: Sudhir Kumar [EMAIL PROTECTED] */
> +/*
> */
> +/* History:
> */
> +/* Created- 20/11/2008 -Sudhir Kumar <[EMAIL PROTECTED]> */
> +/*
> */
> +/******************************************************************************/
> +
> +/* Standard Include Files */
> +#include <unistd.h>
> +#include <math.h>
> +#include <signal.h>
> +#include <stdio.h>
> +#include <stdlib.h>
> +#include <string.h>
> +#include <sys/resource.h>
> +#include <sys/syscall.h>
> +#include <sys/stat.h>
> +#include <fcntl.h>
> +#include <sys/time.h>
> +#include <sys/types.h>
> +#include <time.h>
> +#include <unistd.h>
> +
> +#include "../libcontrollers/libcontrollers.h"
> +#include "test.h" /* LTP harness APIs*/
> +
> +#define TIME_INTERVAL 100 /* Time interval in seconds*/
> +#define NUM_INTERVALS 2 /* How many iterations of TIME_INTERVAL
> */
> +
> +extern int Tst_count;
> +char *TCID = "cpu_controller_test06";
> +int TST_TOTAL = 2;
> +pid_t scriptpid;
> +char path[] = "/dev/cpuctl";
> +extern void
> +cleanup()
> +{
> + kill(scriptpid, SIGUSR1);/* Inform the shell to do cleanup*/
> + tst_exit(); /* Report exit status*/
> +}
> +
> +int timer_expired = 0;
> +
> +int main(int argc, char *argv[])
> +{
> +
> + int test_num, task_num, len, num_cpus;
> + char mygroup[FILENAME_MAX], mytaskfile[FILENAME_MAX];
> + char mysharesfile[FILENAME_MAX], ch;
> + /* Following variables are to capture parameters from script*/
> + char *group_num_p, *mygroup_p, *script_pid_p, *num_cpus_p;
> + char *test_num_p, *task_num_p;
> + int mygroup_num, /* A number attached with a group*/
> + fd, /* to open a fifo to synchronize*/
> + counter = 0; /* To take n number of readings*/
> + double total_cpu_time, /* Accumulated cpu time*/
> + delta_cpu_time, /* Time the task could run on cpu(s)*/
> + prev_cpu_time = 0;
> + double exp_cpu_time; /* Exp time in % by shares calculation*/
> +
> + struct rusage cpu_usage;
> + time_t current_time, prev_time, delta_time;
> + unsigned int fmyshares, num_tasks;
> + unsigned int mygroup_shares;
> + struct sigaction newaction, oldaction;
> + /* Signal handling for alarm*/
> + sigemptyset(&newaction.sa_mask);
> + newaction.sa_handler = signal_handler_alarm;
> + newaction.sa_flags = 0;
> + sigaction(SIGALRM, &newaction, &oldaction);
> +
> + /* Collect the parameters passed by the script */
> + group_num_p = getenv("GROUP_NUM");
> + mygroup_p = getenv("MYGROUP");
> + script_pid_p = getenv("SCRIPT_PID");
> + num_cpus_p = getenv("NUM_CPUS");
> + test_num_p = getenv("TEST_NUM");
> + task_num_p = getenv("TASK_NUM");
> + /* Check if all of them are valid */
> + if ((test_num_p != NULL) && (((test_num = atoi(test_num_p)) <= 10) && \
> + ((test_num = atoi(test_num_p)) >= 9))) {
> + if ((group_num_p != NULL) && (mygroup_p != NULL) && \
> + (script_pid_p != NULL) && (num_cpus_p != NULL) && \
> + (task_num_p != NULL)) {
> + mygroup_num = atoi(group_num_p);
> + scriptpid = atoi(script_pid_p);
> + num_cpus = atoi(num_cpus_p);
> + task_num = atoi(task_num_p);
> + sprintf(mygroup, "%s", mygroup_p);
> + } else {
> + tst_brkm(TBROK, cleanup,
> + "Invalid other input parameters\n");
> + }
> + } else {
> + tst_brkm(TBROK, cleanup, "Invalid test number passed\n");
> + }
> +
> + sprintf(mytaskfile, "%s", mygroup);
> + sprintf(mysharesfile, "%s", mygroup);
> + strcat(mytaskfile, "/tasks");
> + strcat(mysharesfile, "/cpu.shares");
> +
> + write_to_file(mytaskfile, "a", getpid());
> +
> + /*
> + * Let us give the default group 100 shares, as other groups will have
> + * a multiple of 100 shares.
> + */
> + mygroup_shares = 100;
> + write_to_file(mysharesfile, "w", mygroup_shares);
> +
> + fd = open("./myfifo", 0);
> + if (fd == -1)
> + tst_brkm(TBROK, cleanup, "Could not open fifo synchronize");
> +
> + read(fd, &ch, 1); /* Block task here to synchronize */
> +
> + /*
> + * We need not calculate the expected % cpu time of this task, as
> + * neither it is required nor it can be predicted as there are idle
> + * system tasks (and others too) in this group.
> + */
> + FLAG = 0;
> + total_shares = 0;
> + shares_pointer = &total_shares;
> + len = strlen(path);
> + if (!strncpy(fullpath, path, len))
> + tst_brkm(TBROK, cleanup,
> + "Could not copy directory path %s ", path);
> +
> + if (scan_shares_files(shares_pointer) != 0)
> + tst_brkm(TBROK, cleanup,
> + "From function scan_shares_files in %s ", fullpath);
> +
> + /* return val -1 in case of function error, else 2 is min share value */
> + if ((fmyshares = read_shares_file(mysharesfile)) < 2)
> + tst_brkm(TBROK, cleanup,
> + "in reading shares files %s ", mysharesfile);
> +
> + if ((read_file(mytaskfile, GET_TASKS, &num_tasks)) < 0)
> + tst_brkm(TBROK, cleanup,
> + "in reading tasks files %s ", mytaskfile);
> +
> + exp_cpu_time = (double)(fmyshares * 100) / (total_shares * num_tasks);
> +
> + prev_time = time(NULL); /* Note down the time*/
> +
> + while (1) {
> + /*
> + * Need to run some cpu intensive task, which also
> + * frequently checks the timer value
> + */
> + double f = 274.345, mytime; /*just a float number for sqrt*/
> + alarm(TIME_INTERVAL);
> + timer_expired = 0;
> + /*
> + * Let the task run on cpu for TIME_INTERVAL. Time of this
> + * operation should not be high otherwise we can exceed the
> + * TIME_INTERVAL to measure cpu usage
> + */
> + while (!timer_expired)
> + f = sqrt(f * f);
> +
> + current_time = time(NULL);
> + /* Duration in case its not exact TIME_INTERVAL*/
> + delta_time = current_time - prev_time;
> +
> + getrusage(0, &cpu_usage);
> + /* total_cpu_time = total user time + total sys time */
> + total_cpu_time = (cpu_usage.ru_utime.tv_sec +
> + cpu_usage.ru_utime.tv_usec * 1e-6 +
> + cpu_usage.ru_stime.tv_sec +
> + cpu_usage.ru_stime.tv_usec * 1e-6) ;
> + delta_cpu_time = total_cpu_time - prev_cpu_time;
> +
> + prev_cpu_time = total_cpu_time;
> + prev_time = current_time;
> +
> + /* calculate % cpu time each task gets */
> + if (delta_time > TIME_INTERVAL)
> + mytime = (delta_cpu_time * 100) /
> + (delta_time * num_cpus);
> + else
> + mytime = (delta_cpu_time * 100) /
> + (TIME_INTERVAL * num_cpus);
> +
> + /* No neeed to print the results */
> + fprintf(stdout, "Grp:-%3d task-%3d:CPU TIME{calc:-%6.2f(s) i.e."
> + " %6.2f(%%) exp:-%6.2f(%%)} with %3u shares in %lu (s)"
> + " INTERVAL\n", mygroup_num, task_num, delta_cpu_time,
> + mytime, exp_cpu_time, fmyshares, delta_time);
> +
> + counter++;
> +
> + if (counter >= NUM_INTERVALS) {
> + switch (test_num) {
> +
> + case 9: /* Test 09 */
> + case 10: /* Test 10 */
> + exit(0); /* This task is done */
> + break;
> + default:
> + tst_brkm(TBROK, cleanup,
> + "Invalid test number passed\n");
> + break;
> +
> + } /* end switch*/
> + } /* end if*/
> + } /* end while*/
> +} /* end main*/
> +
>
>
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