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https://github.com/lxsang/ant-http
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fix scheduler statistic take too much cpu at idle
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lxsang
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b35cd61da4
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69ad08b1a1
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164
lib/scheduler.c
164
lib/scheduler.c
@ -4,7 +4,6 @@
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#include <stdio.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <poll.h>
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#include <unistd.h>
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#include "scheduler.h"
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#include "utils.h"
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@ -13,12 +12,13 @@ static void set_nonblock(int fd)
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{
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int flags;
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flags = fcntl(fd, F_GETFL, 0);
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if(flags == -1)
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if (flags == -1)
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{
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ERROR("Unable to set flag");
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}
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fcntl(fd, F_SETFL, flags | O_NONBLOCK);
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}
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static void enqueue(antd_task_queue_t *q, antd_task_t *task)
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{
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antd_task_item_t it = *q;
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@ -50,7 +50,7 @@ static void stop(antd_scheduler_t *scheduler)
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pthread_join(scheduler->workers[i].tid, NULL);
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if (scheduler->workers)
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free(scheduler->workers);
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(void)pthread_join(scheduler->stat_tid, NULL);
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(void)pthread_cancel(scheduler->stat_tid);
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// destroy all the mutex
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pthread_mutex_destroy(&scheduler->scheduler_lock);
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pthread_mutex_destroy(&scheduler->worker_lock);
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@ -173,7 +173,7 @@ static void *work(antd_worker_t *worker)
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static void *statistic(antd_scheduler_t *scheduler)
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{
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struct pollfd fdp;
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fd_set fd_out;
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int ret;
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char buffer[MAX_FIFO_NAME_SZ];
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antd_task_item_t it;
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@ -181,72 +181,118 @@ static void *statistic(antd_scheduler_t *scheduler)
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{
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if (scheduler->stat_fd == -1)
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{
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scheduler->stat_fd = open(scheduler->stat_fifo, O_RDWR);
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scheduler->stat_fd = open(scheduler->stat_fifo, O_WRONLY);
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if (scheduler->stat_fd == -1)
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{
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ERROR("Unable to open FIFO %s: %s", scheduler->stat_fifo, strerror(errno));
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return NULL;
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}
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}
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fdp.fd = scheduler->stat_fd;
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fdp.events = POLLOUT;
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// poll the fd in blocking mode
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ret = poll(&fdp, 1, -1);
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if (ret > 0 && (fdp.revents & POLLOUT) && scheduler->pending_task > 0)
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{
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pthread_mutex_lock(&scheduler->scheduler_lock);
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// write statistic data
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snprintf(buffer, MAX_FIFO_NAME_SZ, "Pending task: %d. Detail:\n", scheduler->pending_task);
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ret = write(scheduler->stat_fd, buffer, strlen(buffer));
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for (int i = 0; i < N_PRIORITY; i++)
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else
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{
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snprintf(buffer, MAX_FIFO_NAME_SZ, "#### PRIORITY: %d\n", i);
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ret = write(scheduler->stat_fd, buffer, strlen(buffer));
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set_nonblock(scheduler->stat_fd);
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}
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}
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FD_ZERO(&fd_out);
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FD_SET(scheduler->stat_fd, &fd_out);
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ret = select(scheduler->stat_fd + 1, NULL, &fd_out, NULL, NULL);
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switch (ret)
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{
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case -1:
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ERROR("Error on select(): %s\n", strerror(errno));
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close(scheduler->stat_fd);
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return NULL;
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it = scheduler->task_queue[i];
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while (it)
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case 0:
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break;
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// we have data
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default:
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if (FD_ISSET(scheduler->stat_fd, &fd_out))
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{
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if (scheduler->pending_task > 0)
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{
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// send statistic on task data
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snprintf(buffer, MAX_FIFO_NAME_SZ, "---- Task created at: %lu ----\n", it->task->stamp);
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pthread_mutex_lock(&scheduler->scheduler_lock);
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// write statistic data
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snprintf(buffer, MAX_FIFO_NAME_SZ, "Pending task: %d. Detail:\n", scheduler->pending_task);
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ret = write(scheduler->stat_fd, buffer, strlen(buffer));
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// send statistic on task data
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snprintf(buffer, MAX_FIFO_NAME_SZ, "Access time: %lu\nn", (unsigned long)it->task->access_time);
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ret = write(scheduler->stat_fd, buffer, strlen(buffer));
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snprintf(buffer, MAX_FIFO_NAME_SZ, "Current time: %lu\n", (unsigned long)time(NULL));
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ret = write(scheduler->stat_fd, buffer, strlen(buffer));
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snprintf(buffer, MAX_FIFO_NAME_SZ, "Task type: %d\n", it->task->type);
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ret = write(scheduler->stat_fd, buffer, strlen(buffer));
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if (it->task->handle)
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for (int i = 0; i < N_PRIORITY; i++)
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{
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snprintf(buffer, MAX_FIFO_NAME_SZ, "Has handle: yes\n");
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snprintf(buffer, MAX_FIFO_NAME_SZ, "#### PRIORITY: %d\n", i);
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ret = write(scheduler->stat_fd, buffer, strlen(buffer));
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}
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if (it->task->callback)
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{
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snprintf(buffer, MAX_FIFO_NAME_SZ, "Has callback: yes\n");
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ret = write(scheduler->stat_fd, buffer, strlen(buffer));
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}
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it = scheduler->task_queue[i];
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while (it)
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{
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// send statistic on task data
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snprintf(buffer, MAX_FIFO_NAME_SZ, "---- Task created at: %lu ----\n", it->task->stamp);
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ret = write(scheduler->stat_fd, buffer, strlen(buffer));
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// now print all task data statistic
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if (scheduler->stat_data_cb)
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{
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scheduler->stat_data_cb(scheduler->stat_fd, it->task->data);
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// send statistic on task data
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snprintf(buffer, MAX_FIFO_NAME_SZ, "Access time: %lu\nn", (unsigned long)it->task->access_time);
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ret = write(scheduler->stat_fd, buffer, strlen(buffer));
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snprintf(buffer, MAX_FIFO_NAME_SZ, "Current time: %lu\n", (unsigned long)time(NULL));
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ret = write(scheduler->stat_fd, buffer, strlen(buffer));
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snprintf(buffer, MAX_FIFO_NAME_SZ, "Task type: %d\n", it->task->type);
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ret = write(scheduler->stat_fd, buffer, strlen(buffer));
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if (it->task->handle)
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{
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snprintf(buffer, MAX_FIFO_NAME_SZ, "Has handle: yes\n");
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ret = write(scheduler->stat_fd, buffer, strlen(buffer));
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}
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if (it->task->callback)
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{
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snprintf(buffer, MAX_FIFO_NAME_SZ, "Has callback: yes\n");
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ret = write(scheduler->stat_fd, buffer, strlen(buffer));
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}
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// now print all task data statistic
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if (scheduler->stat_data_cb)
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{
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scheduler->stat_data_cb(scheduler->stat_fd, it->task->data);
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}
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it = it->next;
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}
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}
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pthread_mutex_unlock(&scheduler->scheduler_lock);
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ret = close(scheduler->stat_fd);
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scheduler->stat_fd = -1;
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usleep(5000);
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}
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else
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{
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ret = write(scheduler->stat_fd, ".", 1);
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if(ret == -1)
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{
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ret = close(scheduler->stat_fd);
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scheduler->stat_fd = -1;
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usleep(5000);
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}
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else
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{
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ret = write(scheduler->stat_fd, "\b", 1);
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}
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it = it->next;
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}
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}
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pthread_mutex_unlock(&scheduler->scheduler_lock);
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ret = close(scheduler->stat_fd);
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scheduler->stat_fd = -1;
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usleep(5000);
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else
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{
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ret = close(scheduler->stat_fd);
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scheduler->stat_fd = -1;
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}
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break;
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}
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/* else
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{
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ret = write(scheduler->stat_fd, ".", 1);
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if(ret == -1)
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{
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ret = close(scheduler->stat_fd);
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scheduler->stat_fd = -1;
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}
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} */
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}
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return NULL;
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}
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@ -322,19 +368,9 @@ int antd_scheduler_init(antd_scheduler_t *scheduler, int n)
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}
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else
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{
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// open the fifo in write mode
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scheduler->stat_fd = open(scheduler->stat_fifo, O_RDWR);
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if (scheduler->stat_fd == -1)
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if (pthread_create(&scheduler->stat_tid, NULL, (void *(*)(void *))statistic, scheduler) != 0)
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{
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ERROR("Unable to open FIFO %s: %s", scheduler->stat_fifo, strerror(errno));
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}
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else
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{
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set_nonblock(scheduler->stat_fd);
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if (pthread_create(&scheduler->stat_tid, NULL, (void *(*)(void *))statistic, scheduler) != 0)
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{
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ERROR("pthread_create: cannot create statistic thread: %s", strerror(errno));
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}
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ERROR("pthread_create: cannot create statistic thread: %s", strerror(errno));
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}
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}
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}
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