Hi,
This patch adds the library routines in cpu controller stress test cases 1,2 &3.
It also does minor cleanup.
<addlibrary-stress123.patch>
Signed-off-by: Sudhir Kumar <[EMAIL PROTECTED]>
Index: ltp-full-20080131/testcases/kernel/controllers/cpuctl/cpuctl_test03.c
===================================================================
--- ltp-full-20080131.orig/testcases/kernel/controllers/cpuctl/cpuctl_test03.c
+++ ltp-full-20080131/testcases/kernel/controllers/cpuctl/cpuctl_test03.c
@@ -55,6 +55,7 @@
#include <time.h>
#include <unistd.h>
+#include "../libcontrollers/libcontrollers.h"
#include "test.h" /* LTP harness APIs*/
#define TIME_INTERVAL 60 /* Time interval in seconds*/
@@ -64,6 +65,7 @@ extern int Tst_count;
char *TCID = "cpu_controller_test06";
int TST_TOTAL = 3;
pid_t scriptpid;
+char path[] = "/dev/cpuctl";
extern void
cleanup()
{
@@ -71,15 +73,13 @@ cleanup()
tst_exit (); /* Report exit status*/
}
-int write_to_file (char * file, const char* mode, unsigned int value);
-void signal_handler_alarm (int signal );
int timer_expired = 0;
int main(int argc, char* argv[])
{
- int test_num, task_num, num_cpus; /* To calculate cpu time in %*/
- char mygroup[32], mytaskfile[32], ch;
+ int test_num, task_num, len, num_cpus; /* num_cpus to calculate cpu
time in %*/
+ char mygroup[32], mytaskfile[32], mysharesfile[32], ch;
/* Following variables are to capture parameters from script*/
char *group_num_p, *mygroup_p, *script_pid_p, *num_cpus_p, *test_num_p,
*task_num_p;
pid_t pid;
@@ -89,8 +89,11 @@ int main(int argc, char* argv[])
double total_cpu_time, /* Accumulated cpu time*/
delta_cpu_time, /* Time the task could run on cpu(s)
(in an interval)*/
prev_cpu_time=0;
+ double exp_cpu_time; /* Expected time in % as obtained by
shares calculation */
struct rusage cpu_usage;
time_t current_time, prev_time, delta_time;
+ unsigned int fmyshares, num_tasks;/* f-> from file. num_tasks is tasks
in this group*/
+
struct sigaction newaction, oldaction;
/* Signal handling for alarm*/
sigemptyset (&newaction.sa_mask);
@@ -128,7 +131,9 @@ int main(int argc, char* argv[])
}
sprintf(mytaskfile, "%s", mygroup);
+ sprintf(mysharesfile, "%s", mygroup);
strcat (mytaskfile,"/tasks");
+ strcat (mysharesfile,"/cpu.shares");
pid = getpid();
write_to_file (mytaskfile, "a", pid); /* Assign the task to it's
group*/
@@ -139,6 +144,31 @@ int main(int argc, char* argv[])
}
read (fd, &ch, 1); /* To block all tasks here and fire
them up at the same time*/
+
+ /*
+ * We now calculate the expected % cpu time of this task by getting
+ * it's group's shares, the total shares of all the groups and the
+ * number of tasks 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() != 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)
@@ -166,7 +196,10 @@ int main(int argc, char* argv[])
else
mytime = (delta_cpu_time * 100) / (TIME_INTERVAL *
num_cpus);
- fprintf (stdout,"PID: %u\tgroup-%3d task_num: %3d :cpu time
---> %6.3f\%(%fs)\tinterval:%lu\n",getpid(),my_group_num, task_num, mytime,
delta_cpu_time, delta_time);
+ fprintf (stdout,"Grp:-%3d task-%3d:CPU TIME{calc:-%6.2f(s)i.e.
%6.2f(\%) exp:-%6.2f(\%)}\
+ in %lu (s) INTERVAL\n",my_group_num, task_num, delta_cpu_time, mytime,\
+exp_cpu_time, delta_time);
+
counter++;
if (counter >= NUM_INTERVALS) /* Take n sets of readings for
each shares value*/
@@ -187,20 +220,3 @@ int main(int argc, char* argv[])
} /* end while*/
} /* end main*/
-
-int write_to_file (char *file, const char *mode, unsigned int value)
-{
- FILE *fp;
- fp = fopen (file, mode);
- if (fp == NULL)
- {
- tst_brkm (TBROK, cleanup, "Could not open file %s for writing",
file);
- }
- fprintf (fp, "%u\n", value);
- fclose (fp);
- return 0;
-}
-void signal_handler_alarm (int signal)
-{
- timer_expired = 1;
-}
Thanks,
Sudhir Kumar
LTC, ISTL
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