uti: futex call function in mcctrl
Previously, futex code of McKerenl was called by mccontrol, but there ware some problems with this method. (Mainly, location of McKernel image on memory) Call futex code in mcctrl instead of the one in McKernel image, giving the following benefits: 1. Not relying on shared kernel virtual address space with Linux any more 2. The cpu id store / retrieve is not needed and resulting in the code Change-Id: Ic40929b64a655b270c435859fa287fedb713ee5c refe: #1428
This commit is contained in:
Ken Sato
committed by
Masamichi Takagi
Masamichi Takagi
parent
35296c8210
commit
a9973e913d
160
test/uti/CT32.c
160
test/uti/CT32.c
@@ -4,60 +4,57 @@
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#include <string.h>
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#include <pthread.h>
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#include <errno.h>
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#include <sys/mman.h>
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#include <unistd.h>
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#include <sys/syscall.h>
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#include <linux/futex.h>
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#include <sys/mman.h>
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#include <signal.h>
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#include <getopt.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <stdint.h>
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#include <uti.h>
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#include "util.h"
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#define WAITER_CPU 0
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#define WAKER_CPU 1
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int sem;
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pthread_mutex_t mutex;
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pthread_cond_t cond;
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pthread_barrier_t bar;
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int flag;
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pthread_t thr;
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long t_futex_wait, t_fwq;
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long t_cond_wait, t_fwq;
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long nloop;
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long blocktime = 10L * 1000 * 1000;
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int linux_run;
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void *util_fn(void *arg)
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{
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int i;
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int ret;
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long start, end;
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int testid = 32101;
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long start, end;
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print_cpu_last_executed_on("Utility thread");
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ret = syscall(732);
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OKNGNOJUMP(ret == -1, "Utility thread is running on Linux\n");
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pthread_barrier_wait(&bar);
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for (i = 0; i < nloop; i++) {
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start = rdtsc_light();
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fwq(blocktime);
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end = rdtsc_light();
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t_fwq += end - start;
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if ((ret = syscall(__NR_futex, &sem, FUTEX_WAKE, 1, NULL, NULL, 0)) == -1) {
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printf("Error: futex wake: %s\n", strerror(errno));
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}
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//pthread_barrier_wait(&bar);
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if (!linux_run) {
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ret = syscall(732);
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OKNGNOJUMP(ret == -1, "Utility thread is running on Linux\n");
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}
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pthread_barrier_wait(&bar);
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for (i = 0; i < nloop; i++) {
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start = rdtsc_light();
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pthread_mutex_lock(&mutex); /* no futex */
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while(!flag) {
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pthread_cond_wait(&cond, &mutex); /* 1st futex */
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}
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flag = 0;
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pthread_mutex_unlock(&mutex); /* 2nd futex */
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end = rdtsc_light();
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t_cond_wait += end - start;
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}
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ret = 0;
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fn_fail:
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return NULL;
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}
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@@ -71,21 +68,24 @@ int main(int argc, char **argv)
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{
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int i;
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int ret;
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long start, end;
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long start, end;
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cpu_set_t cpuset;
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pthread_attr_t attr;
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pthread_barrierattr_t bar_attr;
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struct sched_param param = { .sched_priority = 99 };
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int opt;
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while ((opt = getopt_long(argc, argv, "+b:", options, NULL)) != -1) {
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while ((opt = getopt_long(argc, argv, "+b:l", options, NULL)) != -1) {
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switch (opt) {
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case 'b':
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blocktime = atoi(optarg);
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break;
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default: /* '?' */
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printf("unknown option %c\n", optopt);
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exit(1);
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case 'b':
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blocktime = atoi(optarg);
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break;
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case 'l':
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linux_run = 1;
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break;
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default: /* '?' */
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printf("unknown option %c\n", optopt);
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exit(1);
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}
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}
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nloop = (10 * 1000000000UL) / blocktime;
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@@ -102,88 +102,66 @@ int main(int argc, char **argv)
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fwq_init();
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pthread_mutex_init(&mutex, NULL);
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pthread_cond_init(&cond, NULL);
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pthread_barrierattr_init(&bar_attr);
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pthread_barrier_init(&bar, &bar_attr, 2);
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if (!linux_run) {
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ret = syscall(732);
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OKNGNOJUMP(ret != -1, "Master thread is running on McKernel\n");
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ret = syscall(731, 1, NULL);
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OKNGNOJUMP(ret != -1, "util_indicate_clone\n");
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}
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if ((ret = pthread_attr_init(&attr))) {
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printf("Error: pthread_attr_init: %s\n", strerror(errno));
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printf("%s: Error: pthread_attr_init failed (%d)\n", __FUNCTION__, ret);
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goto fn_fail;
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}
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#if 0
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uti_attr_t uti_attr;
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ret = uti_attr_init(&uti_attr);
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if (ret) {
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printf("%s: Error: uti_attr_init failed (%d)\n", __FUNCTION__, ret);
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exit(1);
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}
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/* Give a hint that it's beneficial to prioritize it in scheduling. */
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ret = UTI_ATTR_HIGH_PRIORITY(&uti_attr);
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if (ret) {
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printf("%s: Error: UTI_ATTR_HIGH_PRIORITY failed (%d)\n", __FUNCTION__, ret);
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exit(1);
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}
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if ((ret = pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED))) {
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printf("%s: Error: pthread_attr_setdetachstate failed (%d)\n", __FUNCTION__, ret);
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exit(1);
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}
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if ((ret = uti_pthread_create(&thr, &attr, progress_function, NULL, &uti_attr))) {
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printf("%s: Error: uti_pthread_create: %s\n", __FUNCTION__, strerror(errno));
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exit(1);
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}
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if ((ret = uti_attr_destroy(&uti_attr))) {
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printf("%s: Error: uti_attr_destroy failed (%d)\n", __FUNCTION__, ret);
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exit(1);
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}
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#else
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CPU_ZERO(&cpuset);
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CPU_SET(WAKER_CPU, &cpuset);
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if ((ret = pthread_attr_setaffinity_np(&attr, sizeof(cpu_set_t), &cpuset))) {
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printf("Error: pthread_attr_setaffinity_np: %s\n", strerror(errno));
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printf("%s: Error: pthread_attr_setaffinity_np failed (%d)\n", __FUNCTION__, ret);
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goto fn_fail;
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}
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ret = syscall(732);
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OKNGNOJUMP(ret != -1, "Master thread is running on McKernel\n");
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ret = syscall(731, 1, NULL);
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OKNGNOJUMP(ret != -1, "util_indicate_clone\n");
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if ((ret = pthread_create(&thr, &attr, util_fn, NULL))) {
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printf("Error: pthread_create: %s\n", strerror(errno));
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fprintf(stderr, "Error: pthread_create failed (%d)\n", ret);
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goto fn_fail;
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}
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#endif
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if ((ret = sched_setscheduler(0, SCHED_FIFO, ¶m))) {
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printf("Error: sched_setscheduler: %s\n", strerror(errno));
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ret = -errno;
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goto fn_fail;
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fprintf(stderr, "Warning: sched_setscheduler: %s\n",
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strerror(errno));
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}
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syscall(701, 1 | 2);
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if (!linux_run) {
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syscall(701, 1 | 2);
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}
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pthread_barrier_wait(&bar);
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start = rdtsc_light();
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for (i = 0; i < nloop; i++) {
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if ((ret = syscall(__NR_futex, &sem, FUTEX_WAIT, 0, NULL, NULL, 0))) {
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printf("Error: futex wait failed (%s)\n", strerror(errno));
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}
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start = rdtsc_light();
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//pthread_barrier_wait(&bar); /* 2nd futex */
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fwq(blocktime);
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end = rdtsc_light();
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t_fwq += end - start;
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pthread_mutex_lock(&mutex);
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flag = 1;
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pthread_cond_signal(&cond);
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pthread_mutex_unlock(&mutex);
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}
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if (!linux_run) {
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syscall(701, 4 | 8);
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}
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end = rdtsc_light();
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t_futex_wait += end - start;
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syscall(701, 4 | 8);
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pthread_join(thr, NULL);
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printf("[INFO] waiter: %ld cycles, waker: %ld cycles, (waiter - waker) / nloop: %ld cycles\n", t_fwq, t_futex_wait, (t_futex_wait - t_fwq) / nloop);
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printf("[INFO] waker: %ld cycles, waiter: %ld cycles, (waiter - waker) / nloop: %ld cycles\n", t_fwq, t_cond_wait, (t_cond_wait - t_fwq) / nloop);
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ret = 0;
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fn_fail:
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