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#include <pthread.h>
#include <sched.h>
#include <string.h>
#include <err.h>
#include "bench.h"
static char name[] = "Thread Yield Time (Busy)";
static char doc[] =
"\tThread yield time is defined as the amount of time between that\n"
"\tpoint when a running thread voluntarily gives up the CPU until\n"
"\tthe highest priority runnable thread begins execution of its\n"
"\tapplication code.";
#ifdef DEBUG
volatile int state = 0;
#endif
bench_t b;
void *
other_thread(arg)
void *arg;
{
pthread_set_name_np(pthread_self(), "oth");
bench_amortize(&b, BENCH_LOOPS) {
#ifdef DEBUG
if (state != 0) abort();
state = 1;
#endif
sched_yield();
}
}
int
main() {
pthread_t other;
bench_init(&b, name, doc, "per yield");
b.n = BENCH_LOOPS;
bench_header(&b);
pthread_create(&other, NULL, other_thread, NULL);
while (b.i < b.n) {
#ifdef DEBUG
if (state != 1) abort();
state = 0;
#endif
sched_yield();
}
pthread_join(other, NULL);
b.divisor = 2;
bench_report(&b);
exit(0);
}
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