这是我的服务器的样子:
-WorkerThread(s):
-IOThread(s)
问题是，服务器不会发送所有排队的数据(它们保留在SendBuffer中)，“未发送”数据的数量会随着客户端数量的增加而增加。
为了测试仅使用1个workerthread和1个iothread的im，但是如果我使用更多，似乎没有什么区别。
访问全局缓冲区受pthread_mutex保护。
另外，我的响应数据大小为130k字节(至少需要3个发送调用才能发送此数据量)。另一方面是使用阻塞套接字的Windows客户端。
非常感谢你!
MJ
编辑:
是的，默认情况下，即使我什么也没有发送，我仍在等待EPOLLOUT事件。为了简化实现和手册页指南，我这样做是这样的。另外，我对此并不了解:
即使我当时不想“发送” EPOLLOUT事件，也没问题，因为当我要发送数据时，我会调用send直到将来EAGAIN和EPOLLOUT被触发(这是大多数时间)
现在，我修改了代码以在IN / OUT事件之间切换:
接受时:
event.events = EPOLLIN | EPOLLET | EPOLLRDHUP;
epoll_ctl (pNetServer->m_EventFD, EPOLL_CTL_ADD, infd, &event);
发送完所有数据后:
event.events = EPOLLIN | EPOLLET | EPOLLRDHUP;
epoll_ctl (pNetServer->m_EventFD, EPOLL_CTL_MOD, events[i].data.fd, &event);
当我通过调用IOThread中的send到达EAGAIN时:
event.events = EPOLLOUT | EPOLLET | EPOLLRDHUP;
epoll_ctl (pNetServer->m_EventFD, EPOLL_CTL_MOD, events[i].data.fd, &event);
..我也有同样的行为。此外，我尝试删除EPOLLET标志，但没有任何更改
一个侧面的问题:具有EPOLL_CTL_MOD标志的epoll_ctl是否替换事件成员，或者仅将其与给定参数进行或运算？
EDIT3:更新了IOThread函数以连续发送，直到发送完所有数据或直到EAGAIN。
即使发送了所有数据，我也尝试发送，但是大多数时候我在非套接字上获得errno 88 Socket操作
EDIT4:我修复了“发送代码”中的一些错误，因此我没有收到任何现在未发送的排队数据。.但是，我没有收到应有的尽可能多的数据:))最大数量的“丢失”(未收到)数据我发送完成后，当客户端立即调用recv时获取，并且随着客户端数量的增加而增加。当我在客户端的发送和recv调用(阻塞调用)之间放置2秒的延迟时，我不会丢失服务器上的少量数据，具体取决于正在运行的客户端数量(客户端测试代码包括简单的for循环，其中包含1个send和1个recv调用)
再次尝试使用和不使用ET模式。下面是更新的WorkerThread函数，该函数负责接收数据。
@ Admins / Mods也许我现在应该打开新主题，因为问题有点不同？
void CNetServer::WorkerThread(void* param)
{
CNetServer* pNetServer =(CNetServer*)param;
struct epoll_event event;
struct epoll_event *events;
int s = 0;
// events = (epoll_event*)calloc (MAXEVENTS, sizeof event);
while (1)
{
int n, i;
// printf ("BLOCKING NOW! epoll_wait thread %d\n",pthread_self());
n = pNetServer->m_epollCtrl.Wait(-1);
// printf ("epoll_wait thread %d\n",pthread_self());
pthread_mutex_lock(&g_mtx_WorkerThd);
for (i = 0; i < n; i++)
{
if ((pNetServer->m_epollCtrl.Event(i)->events & EPOLLERR))
{
// An error has occured on this fd, or the socket is not ready for reading (why were we notified then?)
// g_SendBufferArray.RemoveAll( 0 );
char szFileName[30] = {0};
sprintf( (char*)szFileName,"fd_%d.txt",pNetServer->m_epollCtrl.Event(i)->data.fd );
remove(szFileName);
/* printf( "\n\n\n");
printf( "\tDATA LEFT COUNT:%d\n",g_SendBufferArray.size());
for (int k=0;k<g_SendBufferArray.size();k++)
printf( "\tSD: %d DATA LEFT:%d\n",g_SendBufferArray[i]->sd,g_SendBufferArray[i]->nBytesSent );
*/
// fprintf (stderr, "epoll error\n");
// fflush(stdout);
close (pNetServer->m_epollCtrl.Event(i)->data.fd);
continue;
}
else if (pNetServer->m_ListenSocket == pNetServer->m_epollCtrl.Event(i)->data.fd)
{
// We have a notification on the listening socket, which means one or more incoming connections.
while (1)
{
struct sockaddr in_addr;
socklen_t in_len;
int infd;
char hbuf[NI_MAXHOST], sbuf[NI_MAXSERV];
in_len = sizeof in_addr;
infd = accept (pNetServer->m_ListenSocket, &in_addr, &in_len);
if (infd == -1)
{
if ((errno == EAGAIN) ||
(errno == EWOULDBLOCK))
{
// We have processed all incoming connections.
break;
}
else
{
perror ("accept");
break;
}
}
s = getnameinfo (&in_addr, in_len,
hbuf, sizeof hbuf,
sbuf, sizeof sbuf,
NI_NUMERICHOST | NI_NUMERICSERV);
if (s == 0)
{
printf("Accepted connection on descriptor %d "
"(host=%s, port=%s) thread %d\n", infd, hbuf, sbuf,pthread_self());
}
// Make the incoming socket non-blocking and add it to the list of fds to monitor.
CEpollCtrl::SetNonBlock(infd,true);
if ( !pNetServer->m_epollCtrl.Add( infd, EPOLLIN, NULL ))
{
perror ("epoll_ctl");
abort ();
}
}
continue;
}
if( (pNetServer->m_epollCtrl.Event(i)->events & EPOLLOUT) )
{
pNetServer->DoSend( pNetServer->m_epollCtrl.Event(i)->data.fd );
}
if( pNetServer->m_epollCtrl.Event(i)->events & EPOLLIN )
{
printf("EPOLLIN TRIGGERED FOR SD: %d\n",pNetServer->m_epollCtrl.Event(i)->data.fd);
// We have data on the fd waiting to be read.
int done = 0;
ssize_t count = 0;
char buf[512];
while (1)
{
count = read (pNetServer->m_epollCtrl.Event(i)->data.fd, buf, sizeof buf);
printf("recv sd %d size %d thread %d\n",pNetServer->m_epollCtrl.Event(i)->data.fd,count,pthread_self());
if (count == -1)
{
// If errno == EAGAIN, that means we have read all data. So go back to the main loop.
if ( errno != EAGAIN )
{
perror ("read");
done = 1;
}
break;
}
else if (count == 0)
{
//connection is closed by peer.. do a cleanup and close
done = 1;
break;
}
else if (count > 0)
{
static int nDataCounter = 0;
nDataCounter+=count;
printf("RECVDDDDD %d\n",nDataCounter);
CNetServer::s_pRecvContainer->OnData( pNetServer->m_epollCtrl.Event(i)->data.fd, buf, count );
}
}
if (done)
{
printf ("Closed connection on descriptor %d\n",pNetServer->m_epollCtrl.Event(i)->data.fd);
// Closing the descriptor will make epoll remove it from the set of descriptors which are monitored.
close (pNetServer->m_epollCtrl.Event(i)->data.fd);
}
}
}
//
pNetServer->IOThread( (void*)pNetServer );
pthread_mutex_unlock(&g_mtx_WorkerThd);
}
}
void CNetServer::IOThread(void* param)
{
BYTEARRAY* pbPacket = new BYTEARRAY;
int fd;
struct epoll_event event;
CNetServer* pNetServer =(CNetServer*)param;
printf("IOThread startin' !\n");
for (;;)
{
bool bGotIt = CNetServer::s_pRecvContainer->GetPacket( pbPacket, &fd );
if( bGotIt )
{
//process packet here
printf("Got 'em packet yo !\n");
BYTE* re = new BYTE[128000];
memset((void*)re,0xCC,128000);
buffer_t* responsebuff = new buffer_t( fd, re, 128000 ) ;
pthread_mutex_lock(&g_mtx_WorkerThd);
while( 1 )
{
int s;
int nSent = send( responsebuff->sd, ( responsebuff->pbBuffer + responsebuff->nBytesSent ),responsebuff->nSize - responsebuff->nBytesSent,0 );
printf ("IOT: Trying to send nSent: %d buffsize: %d \n",nSent,responsebuff->nSize - responsebuff->nBytesSent);
if (nSent == -1)
{
if (errno == EAGAIN || errno == EWOULDBLOCK )
{
g_vSendBufferArray.push_back( *responsebuff );
printf ("IOT: now waiting for EPOLLOUT\n");
event.data.fd = fd;
event.events = EPOLLIN | EPOLLOUT | EPOLLET | EPOLLRDHUP;
s = epoll_ctl (pNetServer->m_EventFD, EPOLL_CTL_MOD, fd, &event);
break;
if (s == -1)
{
perror ("epoll_ctl");
abort ();
}
}
else
{
printf( "%d\n",errno );
perror ("send");
break;
}
printf ("IOT: WOOOOT\n");
break;
}
else if (nSent == responsebuff->nSize - responsebuff->nBytesSent)
{
printf ("IOT:all is sent! wOOhOO\n");
responsebuff->sd = 0;
responsebuff->nBytesSent += nSent;
delete responsebuff;
break;
}
else if (nSent < responsebuff->nSize - responsebuff->nBytesSent)
{
printf ("IOT: partial send!\n");
responsebuff->nBytesSent += nSent;
}
}
delete [] re;
pthread_mutex_unlock(&g_mtx_WorkerThd);
}
}
}
最佳答案
A)如果该连接的发送队列中已经有数据，则只需添加新数据。您完成了。B)尝试立即发送数据。如果全部发送完毕，请完成。C)将剩余的数据保存在此连接的发送队列中。现在，为该连接请求EPOLLOUT。