source: XIOS/dev/dev_olga/src/context_client.cpp @ 1158

Last change on this file since 1158 was 1158, checked in by oabramkina, 4 years ago

Two server levels: merging with trunk r1137.
There are bugs.

  • Property copyright set to
    Software name : XIOS (Xml I/O Server)
    http://forge.ipsl.jussieu.fr/ioserver
    Creation date : January 2009
    Licence : CeCCIL version2
    see license file in root directory : Licence_CeCILL_V2-en.txt
    or http://www.cecill.info/licences/Licence_CeCILL_V2-en.html
    Holder : CEA/LSCE (Laboratoire des Sciences du CLimat et de l'Environnement)
    CNRS/IPSL (Institut Pierre Simon Laplace)
    Project Manager : Yann Meurdesoif
    yann.meurdesoif@cea.fr
  • Property svn:eol-style set to native
File size: 15.1 KB
Line 
1#include "xios_spl.hpp"
2#include "context_client.hpp"
3#include "context_server.hpp"
4#include "event_client.hpp"
5#include "buffer_out.hpp"
6#include "buffer_client.hpp"
7#include "type.hpp"
8#include "event_client.hpp"
9#include "context.hpp"
10#include "mpi.hpp"
11#include "timer.hpp"
12#include "cxios.hpp"
13#include "server.hpp"
14
15namespace xios
16{
17    /*!
18    \param [in] parent Pointer to context on client side
19    \param [in] intraComm_ communicator of group client
20    \param [in] interComm_ communicator of group server
21    \cxtSer [in] cxtSer Pointer to context of server side. (It is only used in case of attached mode).
22    */
23    CContextClient::CContextClient(CContext* parent, MPI_Comm intraComm_, MPI_Comm interComm_, CContext* cxtSer)
24     : mapBufferSize_(), parentServer(cxtSer), maxBufferedEvents(4)
25    {
26      context = parent;
27      intraComm = intraComm_;
28      interComm = interComm_;
29      MPI_Comm_rank(intraComm, &clientRank);
30      MPI_Comm_size(intraComm, &clientSize);
31
32      int flag;
33      MPI_Comm_test_inter(interComm, &flag);
34      if (flag) MPI_Comm_remote_size(interComm, &serverSize);
35      else  MPI_Comm_size(interComm, &serverSize);
36
37      if (clientSize < serverSize)
38      {
39        int serverByClient = serverSize / clientSize;
40        int remain = serverSize % clientSize;
41        int rankStart = serverByClient * clientRank;
42
43        if (clientRank < remain)
44        {
45          serverByClient++;
46          rankStart += clientRank;
47        }
48        else
49          rankStart += remain;
50
51        for (int i = 0; i < serverByClient; i++)
52          ranksServerLeader.push_back(rankStart + i);
53
54        ranksServerNotLeader.resize(0);
55      }
56      else
57      {
58        int clientByServer = clientSize / serverSize;
59        int remain = clientSize % serverSize;
60
61        if (clientRank < (clientByServer + 1) * remain)
62        {
63          if (clientRank % (clientByServer + 1) == 0)
64            ranksServerLeader.push_back(clientRank / (clientByServer + 1));
65          else
66            ranksServerNotLeader.push_back(clientRank / (clientByServer + 1));
67        }
68        else
69        {
70          int rank = clientRank - (clientByServer + 1) * remain;
71          if (rank % clientByServer == 0)
72            ranksServerLeader.push_back(remain + rank / clientByServer);
73          else
74            ranksServerNotLeader.push_back(remain + rank / clientByServer);
75        }
76      }
77
78      timeLine = 0;
79    }
80
81    /*!
82    In case of attached mode, the current context must be reset to context for client
83    \param [in] event Event sent to server
84    */
85    void CContextClient::sendEvent(CEventClient& event)
86    {
87      list<int> ranks = event.getRanks();
88
89      if (!event.isEmpty())
90      {
91        list<int> sizes = event.getSizes();
92
93        // We force the getBuffers call to be non-blocking on classical servers
94        list<CBufferOut*> buffList;
95        bool couldBuffer = getBuffers(ranks, sizes, buffList, (!CXios::isClient && (CServer::serverLevel == 0) ));
96        //bool couldBuffer = getBuffers(ranks, sizes, buffList, false );
97
98        if (couldBuffer)
99        {
100          event.send(timeLine, sizes, buffList);
101
102          checkBuffers(ranks);
103
104          if (isAttachedModeEnabled()) // couldBuffer is always true in attached mode
105          {
106            waitEvent(ranks);
107            CContext::setCurrent(context->getId());
108          }
109        }
110        else
111        {
112          tmpBufferedEvent.ranks = ranks;
113          tmpBufferedEvent.sizes = sizes;
114
115          for (list<int>::const_iterator it = sizes.begin(); it != sizes.end(); it++)
116            tmpBufferedEvent.buffers.push_back(new CBufferOut(*it));
117
118          event.send(timeLine, tmpBufferedEvent.sizes, tmpBufferedEvent.buffers);
119        }
120      }
121
122      timeLine++;
123    }
124
125    /*!
126     * Send the temporarily buffered event (if any).
127     *
128     * \return true if a temporarily buffered event could be sent, false otherwise
129     */
130    bool CContextClient::sendTemporarilyBufferedEvent()
131    {
132      bool couldSendTmpBufferedEvent = false;
133
134      if (hasTemporarilyBufferedEvent())
135      {
136        list<CBufferOut*> buffList;
137        if (getBuffers(tmpBufferedEvent.ranks, tmpBufferedEvent.sizes, buffList, true)) // Non-blocking call
138        {
139          list<CBufferOut*>::iterator it, itBuffer;
140
141          for (it = tmpBufferedEvent.buffers.begin(), itBuffer = buffList.begin(); it != tmpBufferedEvent.buffers.end(); it++, itBuffer++)
142            (*itBuffer)->put((char*)(*it)->start(), (*it)->count());
143
144          checkBuffers(tmpBufferedEvent.ranks);
145
146          tmpBufferedEvent.clear();
147
148          couldSendTmpBufferedEvent = true;
149        }
150      }
151
152      return couldSendTmpBufferedEvent;
153    }
154
155    /*!
156    If client is also server (attached mode), after sending event, it should process right away
157    the incoming event.
158    \param [in] ranks list rank of server connected this client
159    */
160    void CContextClient::waitEvent(list<int>& ranks)
161    {
162      parentServer->server->setPendingEvent();
163      while (checkBuffers(ranks))
164      {
165        parentServer->server->listen();
166        parentServer->server->checkPendingRequest();
167      }
168
169      while (parentServer->server->hasPendingEvent())
170      {
171       parentServer->server->eventLoop();
172      }
173    }
174
175    /*!
176     * Get buffers for each connection to the servers. This function blocks until there is enough room in the buffers unless
177     * it is explicitly requested to be non-blocking.
178     *
179     * \param [in] serverList list of rank of connected server
180     * \param [in] sizeList size of message corresponding to each connection
181     * \param [out] retBuffers list of buffers that can be used to store an event
182     * \param [in] nonBlocking whether this function should be non-blocking
183     * \return whether the already allocated buffers could be used
184    */
185    bool CContextClient::getBuffers(const list<int>& serverList, const list<int>& sizeList, list<CBufferOut*>& retBuffers,
186                                    bool nonBlocking /*= false*/)
187    {
188      list<int>::const_iterator itServer, itSize;
189      list<CClientBuffer*> bufferList;
190      map<int,CClientBuffer*>::const_iterator it;
191      list<CClientBuffer*>::iterator itBuffer;
192      bool areBuffersFree;
193
194      for (itServer = serverList.begin(); itServer != serverList.end(); itServer++)
195      {
196        it = buffers.find(*itServer);
197        if (it == buffers.end())
198        {
199          newBuffer(*itServer);
200          it = buffers.find(*itServer);
201        }
202        bufferList.push_back(it->second);
203      }
204
205      CTimer::get("Blocking time").resume();
206      do
207      {
208        areBuffersFree = true;
209        for (itBuffer = bufferList.begin(), itSize = sizeList.begin(); itBuffer != bufferList.end(); itBuffer++, itSize++)
210          areBuffersFree &= (*itBuffer)->isBufferFree(*itSize);
211
212        if (!areBuffersFree)
213        {
214          checkBuffers();
215          if (CServer::serverLevel == 0)
216            context->server->listen();
217
218          else if (CServer::serverLevel == 1)
219          {
220            context->server->listen();
221            for (int i = 0; i < context->serverPrimServer.size(); ++i)
222              context->serverPrimServer[i]->listen();
223          }
224
225          else if (CServer::serverLevel == 2)
226            context->server->listen();
227
228        }
229      } while (!areBuffersFree && !nonBlocking);
230
231      CTimer::get("Blocking time").suspend();
232
233      if (areBuffersFree)
234      {
235        for (itBuffer = bufferList.begin(), itSize = sizeList.begin(); itBuffer != bufferList.end(); itBuffer++, itSize++)
236          retBuffers.push_back((*itBuffer)->getBuffer(*itSize));
237      }
238
239      return areBuffersFree;
240   }
241
242   /*!
243   Make a new buffer for a certain connection to server with specific rank
244   \param [in] rank rank of connected server
245   */
246   void CContextClient::newBuffer(int rank)
247   {
248     if (!mapBufferSize_.count(rank))
249     {
250       error(0) << "WARNING: Unexpected request for buffer to communicate with server " << rank << std::endl;
251       mapBufferSize_[rank] = CXios::minBufferSize;
252     }
253     CClientBuffer* buffer = buffers[rank] = new CClientBuffer(interComm, rank, mapBufferSize_[rank], maxBufferedEvents);
254     // Notify the server
255     CBufferOut* bufOut = buffer->getBuffer(sizeof(StdSize));
256     bufOut->put(mapBufferSize_[rank]); // Stupid C++
257     buffer->checkBuffer();
258   }
259
260   /*!
261   Verify state of buffers. Buffer is under pending state if there is no message on it
262   \return state of buffers, pending(true), ready(false)
263   */
264   bool CContextClient::checkBuffers(void)
265   {
266      map<int,CClientBuffer*>::iterator itBuff;
267      bool pending = false;
268      for (itBuff = buffers.begin(); itBuff != buffers.end(); itBuff++)
269        pending |= itBuff->second->checkBuffer();
270      return pending;
271   }
272
273   //! Release all buffers
274   void CContextClient::releaseBuffers()
275   {
276      map<int,CClientBuffer*>::iterator itBuff;
277      for (itBuff = buffers.begin(); itBuff != buffers.end(); itBuff++)
278      {
279          delete itBuff->second;
280      }
281      buffers.clear();
282   }
283
284   /*!
285   Verify state of buffers corresponding to a connection
286   \param [in] ranks list rank of server to which client connects to
287   \return state of buffers, pending(true), ready(false)
288   */
289   bool CContextClient::checkBuffers(list<int>& ranks)
290   {
291      list<int>::iterator it;
292      bool pending = false;
293      for (it = ranks.begin(); it != ranks.end(); it++) pending |= buffers[*it]->checkBuffer();
294      return pending;
295   }
296
297   /*!
298    * Set the buffer size for each connection. Warning: This function is collective.
299    *
300    * \param [in] mapSize maps the rank of the connected servers to the size of the correspoinding buffer
301    * \param [in] maxEventSize maps the rank of the connected servers to the size of the biggest event
302   */
303   void CContextClient::setBufferSize(const std::map<int,StdSize>& mapSize, const std::map<int,StdSize>& maxEventSize)
304   {
305     mapBufferSize_ = mapSize;
306
307     // Compute the maximum number of events that can be safely buffered.
308     double minBufferSizeEventSizeRatio = std::numeric_limits<double>::max();
309     for (std::map<int,StdSize>::const_iterator it = mapSize.begin(), ite = mapSize.end(); it != ite; ++it)
310     {
311       double ratio = double(it->second) / maxEventSize.at(it->first);
312       if (ratio < minBufferSizeEventSizeRatio) minBufferSizeEventSizeRatio = ratio;
313     }
314     MPI_Allreduce(MPI_IN_PLACE, &minBufferSizeEventSizeRatio, 1, MPI_DOUBLE, MPI_MIN, intraComm);
315
316     if (minBufferSizeEventSizeRatio < 1.0)
317       ERROR("void CContextClient::setBufferSize(const std::map<int,StdSize>& mapSize, const std::map<int,StdSize>& maxEventSize)",
318             << "The buffer sizes and the maximum events sizes are incoherent.");
319
320     maxBufferedEvents = size_t(2 * minBufferSizeEventSizeRatio) // there is room for two local buffers on the server
321                          + size_t(minBufferSizeEventSizeRatio)  // one local buffer can always be fully used
322                          + 1;                                   // the other local buffer might contain only one event
323   }
324
325  /*!
326  Get leading server in the group of connected server
327  \return ranks of leading servers
328  */
329  const std::list<int>& CContextClient::getRanksServerNotLeader(void) const
330  {
331    return ranksServerNotLeader;
332  }
333
334  /*!
335  Check if client connects to leading server
336  \return connected(true), not connected (false)
337  */
338  bool CContextClient::isServerNotLeader(void) const
339  {
340    return !ranksServerNotLeader.empty();
341  }
342
343  /*!
344  Get leading server in the group of connected server
345  \return ranks of leading servers
346  */
347  const std::list<int>& CContextClient::getRanksServerLeader(void) const
348  {
349    return ranksServerLeader;
350  }
351
352  /*!
353  Check if client connects to leading server
354  \return connected(true), not connected (false)
355  */
356  bool CContextClient::isServerLeader(void) const
357  {
358    return !ranksServerLeader.empty();
359  }
360
361  /*!
362   * Check if the attached mode is used.
363   *
364   * \return true if and only if attached mode is used
365   */
366  bool CContextClient::isAttachedModeEnabled() const
367  {
368    return (parentServer != 0);
369  }
370
371   /*!
372   * Finalize context client and do some reports. Function is non-blocking.
373   */
374  void CContextClient::finalize(void)
375  {
376    map<int,CClientBuffer*>::iterator itBuff;
377    bool stop = false;
378
379    CTimer::get("Blocking time").resume();
380    while (hasTemporarilyBufferedEvent())
381    {
382      checkBuffers();
383      sendTemporarilyBufferedEvent();
384    }
385    CTimer::get("Blocking time").suspend();
386
387    CEventClient event(CContext::GetType(), CContext::EVENT_ID_CONTEXT_FINALIZE);
388    if (isServerLeader())
389    {
390      CMessage msg;
391      const std::list<int>& ranks = getRanksServerLeader();
392      for (std::list<int>::const_iterator itRank = ranks.begin(), itRankEnd = ranks.end(); itRank != itRankEnd; ++itRank)
393        event.push(*itRank, 1, msg);
394      sendEvent(event);
395    }
396    else sendEvent(event);
397
398    CTimer::get("Blocking time").resume();
399//    while (!stop)
400    {
401      checkBuffers();
402      if (hasTemporarilyBufferedEvent())
403        sendTemporarilyBufferedEvent();
404
405      stop = true;
406//      for (itBuff = buffers.begin(); itBuff != buffers.end(); itBuff++) stop &= !itBuff->second->hasPendingRequest();
407    }
408    CTimer::get("Blocking time").suspend();
409
410    std::map<int,StdSize>::const_iterator itbMap = mapBufferSize_.begin(),
411                                          iteMap = mapBufferSize_.end(), itMap;
412
413    StdSize totalBuf = 0;
414    for (itMap = itbMap; itMap != iteMap; ++itMap)
415    {
416      report(10) << " Memory report : Context <" << context->getId() << "> : client side : memory used for buffer of each connection to server" << endl
417                 << "  +) To server with rank " << itMap->first << " : " << itMap->second << " bytes " << endl;
418      totalBuf += itMap->second;
419    }
420    report(0) << " Memory report : Context <" << context->getId() << "> : client side : total memory used for buffer " << totalBuf << " bytes" << endl;
421
422    //releaseBuffers(); // moved to CContext::finalize()
423  }
424
425  /*!
426  * Finalize context client and do some reports. Function is non-blocking.
427  */
428 void CContextClient::postFinalize(void)
429 {
430   map<int,CClientBuffer*>::iterator itBuff;
431   bool stop = false;
432
433   CTimer::get("Blocking time").resume();
434   while (hasTemporarilyBufferedEvent())
435   {
436     checkBuffers();
437     sendTemporarilyBufferedEvent();
438   }
439   CTimer::get("Blocking time").suspend();
440
441   CEventClient event(CContext::GetType(), CContext::EVENT_ID_CONTEXT_POST_FINALIZE);
442   if (isServerLeader())
443   {
444     CMessage msg;
445     const std::list<int>& ranks = getRanksServerLeader();
446     for (std::list<int>::const_iterator itRank = ranks.begin(), itRankEnd = ranks.end(); itRank != itRankEnd; ++itRank)
447       event.push(*itRank, 1, msg);
448     sendEvent(event);
449   }
450   else sendEvent(event);
451
452   CTimer::get("Blocking time").resume();
453//    while (!stop)
454   {
455     checkBuffers();
456     if (hasTemporarilyBufferedEvent())
457       sendTemporarilyBufferedEvent();
458
459     stop = true;
460   }
461   CTimer::get("Blocking time").suspend();
462
463 }
464
465  /*!
466  */
467  bool CContextClient::havePendingRequests(void)
468  {
469    bool pending = false;
470    map<int,CClientBuffer*>::iterator itBuff;
471    for (itBuff = buffers.begin(); itBuff != buffers.end(); itBuff++)
472      pending |= itBuff->second->hasPendingRequest();
473    return pending;
474  }
475
476
477}
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