gpu/command_buffer/client/query_tracker.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "gpu/command_buffer/client/query_tracker.h"
   6
   7 #include <GLES2/gl2.h>
   8 #include <GLES2/gl2ext.h>
   9 #include <GLES2/gl2extchromium.h>
  10
  11 #include "base/atomicops.h"
  12 #include "gpu/command_buffer/client/gles2_cmd_helper.h"
  13 #include "gpu/command_buffer/client/gles2_implementation.h"
  14 #include "gpu/command_buffer/client/mapped_memory.h"
  15 #include "gpu/command_buffer/common/time.h"
  16
  17 namespace gpu {
  18 namespace gles2 {
  19
  20 QuerySyncManager::QuerySyncManager(MappedMemoryManager* manager)
  21     : mapped_memory_(manager) {
  22   DCHECK(manager);
  23 }
  24
  25 QuerySyncManager::~QuerySyncManager() {
  26   while (!buckets_.empty()) {
  27     mapped_memory_->Free(buckets_.front()->syncs);
  28     delete buckets_.front();
  29     buckets_.pop_front();
  30   }
  31 }
  32
  33 bool QuerySyncManager::Alloc(QuerySyncManager::QueryInfo* info) {
  34   DCHECK(info);
  35   if (free_queries_.empty()) {
  36     int32 shm_id;
  37     unsigned int shm_offset;
  38     void* mem = mapped_memory_->Alloc(
  39         kSyncsPerBucket * sizeof(QuerySync), &shm_id, &shm_offset);
  40     if (!mem) {
  41       return false;
  42     }
  43     QuerySync* syncs = static_cast<QuerySync*>(mem);
  44     Bucket* bucket = new Bucket(syncs);
  45     buckets_.push_back(bucket);
  46     for (size_t ii = 0; ii < kSyncsPerBucket; ++ii) {
  47       free_queries_.push_back(QueryInfo(bucket, shm_id, shm_offset, syncs));
  48       ++syncs;
  49       shm_offset += sizeof(*syncs);
  50     }
  51   }
  52   *info = free_queries_.front();
  53   ++(info->bucket->used_query_count);
  54   info->sync->Reset();
  55   free_queries_.pop_front();
  56   return true;
  57 }
  58
  59 void QuerySyncManager::Free(const QuerySyncManager::QueryInfo& info) {
  60   DCHECK_GT(info.bucket->used_query_count, 0u);
  61   --(info.bucket->used_query_count);
  62   free_queries_.push_back(info);
  63 }
  64
  65 void QuerySyncManager::Shrink() {
  66   std::deque<QueryInfo> new_queue;
  67   while (!free_queries_.empty()) {
  68     if (free_queries_.front().bucket->used_query_count)
  69       new_queue.push_back(free_queries_.front());
  70     free_queries_.pop_front();
  71   }
  72   free_queries_.swap(new_queue);
  73
  74   std::deque<Bucket*> new_buckets;
  75   while (!buckets_.empty()) {
  76     Bucket* bucket = buckets_.front();
  77     if (bucket->used_query_count) {
  78       new_buckets.push_back(bucket);
  79     } else {
  80       mapped_memory_->Free(bucket->syncs);
  81       delete bucket;
  82     }
  83     buckets_.pop_front();
  84   }
  85   buckets_.swap(new_buckets);
  86 }
  87
  88 QueryTracker::Query::Query(GLuint id, GLenum target,
  89                            const QuerySyncManager::QueryInfo& info)
  90     : id_(id),
  91       target_(target),
  92       info_(info),
  93       state_(kUninitialized),
  94       submit_count_(0),
  95       token_(0),
  96       flush_count_(0),
  97       client_begin_time_us_(0),
  98       result_(0) {
  99     }
 100
 101
 102 void QueryTracker::Query::Begin(GLES2Implementation* gl) {
 103   // init memory, inc count
 104   MarkAsActive();
 105
 106   switch (target()) {
 107     case GL_GET_ERROR_QUERY_CHROMIUM:
 108       // To nothing on begin for error queries.
 109       break;
 110     case GL_LATENCY_QUERY_CHROMIUM:
 111       client_begin_time_us_ = MicrosecondsSinceOriginOfTime();
 112       // tell service about id, shared memory and count
 113       gl->helper()->BeginQueryEXT(target(), id(), shm_id(), shm_offset());
 114       break;
 115     case GL_ASYNC_PIXEL_UNPACK_COMPLETED_CHROMIUM:
 116     case GL_ASYNC_PIXEL_PACK_COMPLETED_CHROMIUM:
 117     default:
 118       // tell service about id, shared memory and count
 119       gl->helper()->BeginQueryEXT(target(), id(), shm_id(), shm_offset());
 120       break;
 121   }
 122 }
 123
 124 void QueryTracker::Query::End(GLES2Implementation* gl) {
 125   switch (target()) {
 126     case GL_GET_ERROR_QUERY_CHROMIUM: {
 127       GLenum error = gl->GetClientSideGLError();
 128       if (error == GL_NO_ERROR) {
 129         // There was no error so start the query on the service.
 130         // it will end immediately.
 131         gl->helper()->BeginQueryEXT(target(), id(), shm_id(), shm_offset());
 132       } else {
 133         // There's an error on the client, no need to bother the service. Just
 134         // set the query as completed and return the error.
 135         if (error != GL_NO_ERROR) {
 136           state_ = kComplete;
 137           result_ = error;
 138           return;
 139         }
 140       }
 141     }
 142   }
 143   flush_count_ = gl->helper()->flush_generation();
 144   gl->helper()->EndQueryEXT(target(), submit_count());
 145   MarkAsPending(gl->helper()->InsertToken());
 146 }
 147
 148 bool QueryTracker::Query::CheckResultsAvailable(
 149     CommandBufferHelper* helper) {
 150   if (Pending()) {
 151     if (base::subtle::Acquire_Load(&info_.sync->process_count) ==
 152             submit_count_ ||
 153         helper->IsContextLost()) {
 154       switch (target()) {
 155         case GL_COMMANDS_ISSUED_CHROMIUM:
 156           result_ = std::min(info_.sync->result,
 157                              static_cast<uint64>(0xFFFFFFFFL));
 158           break;
 159         case GL_LATENCY_QUERY_CHROMIUM:
 160           DCHECK(info_.sync->result >= client_begin_time_us_);
 161           result_ = std::min(info_.sync->result - client_begin_time_us_,
 162                              static_cast<uint64>(0xFFFFFFFFL));
 163           break;
 164         case GL_ASYNC_PIXEL_UNPACK_COMPLETED_CHROMIUM:
 165         case GL_ASYNC_PIXEL_PACK_COMPLETED_CHROMIUM:
 166         default:
 167           result_ = info_.sync->result;
 168           break;
 169       }
 170       state_ = kComplete;
 171     } else {
 172       if ((helper->flush_generation() - flush_count_ - 1) >= 0x80000000) {
 173         helper->Flush();
 174       } else {
 175         // Insert no-ops so that eventually the GPU process will see more work.
 176         helper->Noop(1);
 177       }
 178     }
 179   }
 180   return state_ == kComplete;
 181 }
 182
 183 uint32 QueryTracker::Query::GetResult() const {
 184   DCHECK(state_ == kComplete || state_ == kUninitialized);
 185   return result_;
 186 }
 187
 188 QueryTracker::QueryTracker(MappedMemoryManager* manager)
 189     : query_sync_manager_(manager) {
 190 }
 191
 192 QueryTracker::~QueryTracker() {
 193   while (!queries_.empty()) {
 194     delete queries_.begin()->second;
 195     queries_.erase(queries_.begin());
 196   }
 197   while (!removed_queries_.empty()) {
 198     delete removed_queries_.front();
 199     removed_queries_.pop_front();
 200   }
 201 }
 202
 203 QueryTracker::Query* QueryTracker::CreateQuery(GLuint id, GLenum target) {
 204   DCHECK_NE(0u, id);
 205   FreeCompletedQueries();
 206   QuerySyncManager::QueryInfo info;
 207   if (!query_sync_manager_.Alloc(&info)) {
 208     return NULL;
 209   }
 210   Query* query = new Query(id, target, info);
 211   std::pair<QueryMap::iterator, bool> result =
 212       queries_.insert(std::make_pair(id, query));
 213   DCHECK(result.second);
 214   return query;
 215 }
 216
 217 QueryTracker::Query* QueryTracker::GetQuery(
 218     GLuint client_id) {
 219   QueryMap::iterator it = queries_.find(client_id);
 220   return it != queries_.end() ? it->second : NULL;
 221 }
 222
 223 void QueryTracker::RemoveQuery(GLuint client_id) {
 224   QueryMap::iterator it = queries_.find(client_id);
 225   if (it != queries_.end()) {
 226     Query* query = it->second;
 227     // When you delete a query you can't mark its memory as unused until it's
 228     // completed.
 229     // Note: If you don't do this you won't mess up the service but you will
 230     // mess up yourself.
 231     removed_queries_.push_back(query);
 232     queries_.erase(it);
 233     FreeCompletedQueries();
 234   }
 235 }
 236
 237 void QueryTracker::Shrink() {
 238   FreeCompletedQueries();
 239   query_sync_manager_.Shrink();
 240 }
 241
 242 void QueryTracker::FreeCompletedQueries() {
 243   QueryList::iterator it = removed_queries_.begin();
 244   while (it != removed_queries_.end()) {
 245     Query* query = *it;
 246     if (query->Pending() &&
 247         base::subtle::Acquire_Load(&query->info_.sync->process_count) !=
 248             query->submit_count()) {
 249       ++it;
 250       continue;
 251     }
 252
 253     query_sync_manager_.Free(query->info_);
 254     it = removed_queries_.erase(it);
 255     delete query;
 256   }
 257 }
 258
 259 }  // namespace gles2
 260 }  // namespace gpu