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/*
* pthreadtest.c: a stupid nop loop with pthreads
*
* Copyright (c) 2003-2006 Hewlett-Packard Development Company, L.P.
* Contributed by Stephane Eranian <eranian@hpl.hp.com>
*
* 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
*/
#include <sys/types.h>
#include <pthread.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#ifdef __GNUC__
extern inline void
clear_psr_ac(void)
{
__asm__ __volatile__("rum psr.ac;;" ::: "memory" );
}
#elif defined(__ECC) && defined(__INTEL_COMPILER)
#include <ia64intrin.h>
#define clear_psr_ac() __rum(1<<3)
#else
#error "You need to define clear_psr_ac() for your compiler"
#endif
#define PFM_TEST_INVALID -1
#define PFM_TEST_VALID 0
static union {
unsigned long l_tab[2];
unsigned int i_tab[4];
unsigned short s_tab[8];
unsigned char c_tab[16];
} __attribute__((__aligned__(32))) messy;
/*
* 1 load, 1 store both unaligned
*/
int
do_two_una(unsigned long pace_count)
{
unsigned int *l, v;
unsigned long c = pace_count;
static unsigned int called;
called++;
l = (unsigned int *)(messy.c_tab+1);
if (((unsigned long)l & 0x1) == 0) {
printf("Data is not unaligned, can't run test\n");
return -1;
}
v = *l;
while(c) c--; /* space the accesses */
v++;
*l = v;
if (v != called) return -1;
return c == 0 ? 0: -1;
}
int
do_una_test(unsigned long count, unsigned long pace)
{
int ret;
/* let the hardware do the unaligned access */
clear_psr_ac();
ret = 0;
while (count-- && ret == 0) {
ret = do_two_una(pace);
printf("pid=%d count=%lu\n", getpid(), count);
}
return ret;
}
int
do_test1(unsigned long loop)
{
return do_una_test(loop, 0);
}
int
do_test2(unsigned long loop)
{
return do_una_test(loop, 0);
}
void
launch_test2(void *data)
{
unsigned long loop = *(unsigned long *)data;
int retval = 0;
do_test2(loop);
pthread_exit((void *)&retval);
}
int
main(int argc, char **argv)
{
pthread_t *thread_list;
unsigned long loop;
int nt, nthreads = 0, ret;
loop = argc > 1 ? strtoul(argv[1], NULL, 0) : 1000;
nt = argc > 2 ? atoi(argv[2]) : 0;
printf("creating %d thread(s)\n", nt);
printf("expecting %lu misaligned loads for parent\n", loop);
printf("expecting %lu misaligned loads for each thread (except manager)\n", loop);
thread_list = malloc(nt*sizeof(pthread_t));
if (thread_list == NULL) {
fprintf(stderr, "cannot malloc thread table for %d threads\n", nthreads);
exit(1);
}
while (nt--) {
ret = pthread_create(&thread_list[nt], NULL, (void *(*)(void *))launch_test2, &loop);
if (ret == -1) goto cleanup;
nthreads++;
}
do_test1(loop);
cleanup:
while(nthreads--) {
pthread_join(thread_list[nthreads], NULL);
}
exit(0);
}
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