On Fri, 2008-11-21 at 17:25 +0530, [EMAIL PROTECTED] wrote:
> plain text document attachment (add-default-task1.patch)
> This patch adds a binary which will be running as a default task for testcases
> 1 to create an ideal scenario.
>
> Signed-off-by: Sudhir Kumar <[EMAIL PROTECTED]>
Thanks.
Regards--
Subrata
>
> Index:
> ltp-full-20081031/testcases/kernel/controllers/cpuctl/cpuctl_def_task01.c
> ===================================================================
> --- /dev/null
> +++ ltp-full-20081031/testcases/kernel/controllers/cpuctl/cpuctl_def_task01.c
> @@ -0,0 +1,235 @@
> +/******************************************************************************/
> +/*
> */
> +/* 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_def01.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*/
> +/*
> */
> +/* Total Tests: 1
> */
> +/*
> */
> +/* Test Name: cpu_controller_tests
> */
> +/*
> */
> +/* Test Assertion
> */
> +/* Please refer to the file cpuctl_testplan.txt
> */
> +/*
> */
> +/* Author: Sudhir Kumar [EMAIL PROTECTED] */
> +/*
> */
> +/* History:
> */
> +/* Created- 14/11/2008 -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/time.h>
> +#include <sys/types.h>
> +#include <sys/stat.h>
> +#include <fcntl.h>
> +#include <time.h>
> +#include <unistd.h>
> +
> +#include "../libcontrollers/libcontrollers.h"
> +#include "test.h" /* LTP harness APIs*/
> +
> +
> +#ifdef DEBUG
> +#define dbg(x...) printf(x);
> +#else
> +#define dbg(x...) do {} while (0)
> +#endif
> +
> +#define TIME_INTERVAL 30 /* Time interval in seconds*/
> +#define NUM_INTERVALS 3 /* How many iterations of TIME_INTERVAL
> */
> +#define NUM_SETS 4 /* How many share values (with same ratio)*/
> +#define MULTIPLIER 10 /* Rate at which share value gets
> multiplied*/
> +
> +extern int Tst_count;
> +char *TCID = "cpu_controller_tests";
> +int TST_TOTAL = 1;
> +pid_t scriptpid;
> +char path[FILENAME_MAX] = "/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 num_cpus, test_num, len; /* Total time = TIME_INTERVAL*num_cpus*/
> + char mygroup[FILENAME_MAX], mytaskfile[FILENAME_MAX];
> + char mysharesfile[FILENAME_MAX], ch;
> + pid_t pid;
> + int my_group_num, /* A number attached with a group*/
> + fd, /* To open a fifo for synchronization*/
> + first_counter = 0, /* To take n number of readings*/
> + second_counter = 0; /* no of times shares have changed*/
> + 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 long int myshares = 2;
> + unsigned int fmyshares, num_tasks;
> + 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);
> +
> + /* Check if all parameters passed are correct*/
> + if ((argc < 5) || ((my_group_num = atoi(argv[1])) <= 0) || \
> + ((scriptpid = atoi(argv[3])) <= 0) || \
> + ((num_cpus = atoi(argv[4])) <= 0) || \
> + (test_num = atoi(argv[5])) <= 0)
> + tst_brkm(TBROK, cleanup, "Invalid input parameters\n");
> +
> + if (test_num == 1)
> + myshares *= my_group_num;
> + else
> + tst_brkm(TBROK, cleanup, "Wrong Test num passed. Exiting.\n");
> +
> + sprintf(mygroup, "%s", argv[2]);
> + sprintf(mytaskfile, "%s", mygroup);
> + sprintf(mysharesfile, "%s", mygroup);
> + strcat(mytaskfile, "/tasks");
> + strcat(mysharesfile, "/cpu.shares");
> + pid = getpid();
> + write_to_file(mytaskfile, "a", pid); /* Assign task to it's group*/
> + write_to_file(mysharesfile, "w", myshares);
> + dbg("Default task's initial shares = %u", myshares);
> +
> + fd = open("./myfifo", 0);
> + if (fd == -1)
> + tst_brkm(TBROK, cleanup, "Could not open fifo to synchronizae");
> +
> + read(fd, &ch, 1); /* To fire all the tasks up at the same time*/
> +
> + /*
> + * 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);
> +
> + /*
> + * Lets print the results. The exp cpu time calculated may not
> + * be correct due to running system tasks at the moment
> + */
> + fprintf(stdout, "DEF TASK:CPU TIME{calc:-%6.2f(s)"
> + " i.e. %6.2f(%%) exp:-%6.2f(%%)} with %lu(shares)"
> + " in %lu (s) INTERVAL\n", delta_cpu_time, mytime,
> + exp_cpu_time, myshares, delta_time);
> + first_counter++;
> +
> + /* Take n sets of readings for each shares value*/
> + if (first_counter >= NUM_INTERVALS) {
> + first_counter = 0;
> + second_counter++;
> + if (second_counter >= NUM_SETS)
> + exit(0); /* This task is done */
> +
> + /* Keep same ratio but change values*/
> + myshares = MULTIPLIER * myshares;
> + write_to_file(mysharesfile, "w", myshares);
> +
> + }/* end if*/
> + }/* end while*/
> +}/* end main*/
> +
>
>
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