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 <limits.h>
  12
  13 #include "base/atomicops.h"
  14 #include "base/numerics/safe_conversions.h"
  15 #include "gpu/command_buffer/client/gles2_cmd_helper.h"
  16 #include "gpu/command_buffer/client/gles2_implementation.h"
  17 #include "gpu/command_buffer/client/mapped_memory.h"
  18 #include "gpu/command_buffer/common/time.h"
  19
  20 namespace gpu {
  21 namespace gles2 {
  22
  23 QuerySyncManager::Bucket::Bucket(QuerySync* sync_mem,
  24                                  int32 shm_id,
  25                                  unsigned int shm_offset)
  26     : syncs(sync_mem),
  27       shm_id(shm_id),
  28       base_shm_offset(shm_offset) {
  29 }
  30
  31 QuerySyncManager::Bucket::~Bucket() = default;
  32
  33 QuerySyncManager::QuerySyncManager(MappedMemoryManager* manager)
  34     : mapped_memory_(manager) {
  35   DCHECK(manager);
  36 }
  37
  38 QuerySyncManager::~QuerySyncManager() {
  39   while (!buckets_.empty()) {
  40     mapped_memory_->Free(buckets_.front()->syncs);
  41     delete buckets_.front();
  42     buckets_.pop_front();
  43   }
  44 }
  45
  46 bool QuerySyncManager::Alloc(QuerySyncManager::QueryInfo* info) {
  47   DCHECK(info);
  48   Bucket* bucket = nullptr;
  49   for (Bucket* bucket_candidate : buckets_) {
  50     // In C++11 STL this could be replaced with
  51     // if (!bucket_candidate->in_use_queries.all()) { ... }
  52     if (bucket_candidate->in_use_queries.count() != kSyncsPerBucket) {
  53       bucket = bucket_candidate;
  54       break;
  55     }
  56   }
  57   if (!bucket) {
  58     int32 shm_id;
  59     unsigned int shm_offset;
  60     void* mem = mapped_memory_->Alloc(
  61         kSyncsPerBucket * sizeof(QuerySync), &shm_id, &shm_offset);
  62     if (!mem) {
  63       return false;
  64     }
  65     QuerySync* syncs = static_cast<QuerySync*>(mem);
  66     bucket = new Bucket(syncs, shm_id, shm_offset);
  67     buckets_.push_back(bucket);
  68   }
  69
  70   unsigned short index_in_bucket = 0;
  71   for (size_t i = 0; i < kSyncsPerBucket; i++) {
  72     if (!bucket->in_use_queries[i]) {
  73       index_in_bucket = i;
  74       break;
  75     }
  76   }
  77
  78   uint32 shm_offset =
  79       bucket->base_shm_offset + index_in_bucket * sizeof(QuerySync);
  80   QuerySync* sync = bucket->syncs + index_in_bucket;
  81   *info = QueryInfo(bucket, bucket->shm_id, shm_offset, sync);
  82   info->sync->Reset();
  83   bucket->in_use_queries[index_in_bucket] = true;
  84   return true;
  85 }
  86
  87 void QuerySyncManager::Free(const QuerySyncManager::QueryInfo& info) {
  88   DCHECK_NE(info.bucket->in_use_queries.count(), 0u);
  89   unsigned short index_in_bucket = info.sync - info.bucket->syncs;
  90   DCHECK(info.bucket->in_use_queries[index_in_bucket]);
  91   info.bucket->in_use_queries[index_in_bucket] = false;
  92 }
  93
  94 void QuerySyncManager::Shrink() {
  95   std::deque<Bucket*> new_buckets;
  96   while (!buckets_.empty()) {
  97     Bucket* bucket = buckets_.front();
  98     if (bucket->in_use_queries.any()) {
  99       new_buckets.push_back(bucket);
 100     } else {
 101       mapped_memory_->Free(bucket->syncs);
 102       delete bucket;
 103     }
 104     buckets_.pop_front();
 105   }
 106   buckets_.swap(new_buckets);
 107 }
 108
 109 QueryTracker::Query::Query(GLuint id, GLenum target,
 110                            const QuerySyncManager::QueryInfo& info)
 111     : id_(id),
 112       target_(target),
 113       info_(info),
 114       state_(kUninitialized),
 115       submit_count_(0),
 116       token_(0),
 117       flush_count_(0),
 118       client_begin_time_us_(0),
 119       result_(0) {
 120     }
 121
 122
 123 void QueryTracker::Query::Begin(GLES2Implementation* gl) {
 124   // init memory, inc count
 125   MarkAsActive();
 126
 127   switch (target()) {
 128     case GL_GET_ERROR_QUERY_CHROMIUM:
 129       // To nothing on begin for error queries.
 130       break;
 131     case GL_LATENCY_QUERY_CHROMIUM:
 132       client_begin_time_us_ = MicrosecondsSinceOriginOfTime();
 133       // tell service about id, shared memory and count
 134       gl->helper()->BeginQueryEXT(target(), id(), shm_id(), shm_offset());
 135       break;
 136     case GL_ASYNC_PIXEL_PACK_COMPLETED_CHROMIUM:
 137     default:
 138       // tell service about id, shared memory and count
 139       gl->helper()->BeginQueryEXT(target(), id(), shm_id(), shm_offset());
 140       break;
 141   }
 142 }
 143
 144 void QueryTracker::Query::End(GLES2Implementation* gl) {
 145   switch (target()) {
 146     case GL_GET_ERROR_QUERY_CHROMIUM: {
 147       GLenum error = gl->GetClientSideGLError();
 148       if (error == GL_NO_ERROR) {
 149         // There was no error so start the query on the service.
 150         // it will end immediately.
 151         gl->helper()->BeginQueryEXT(target(), id(), shm_id(), shm_offset());
 152       } else {
 153         // There's an error on the client, no need to bother the service. Just
 154         // set the query as completed and return the error.
 155         if (error != GL_NO_ERROR) {
 156           state_ = kComplete;
 157           result_ = error;
 158           return;
 159         }
 160       }
 161     }
 162   }
 163   flush_count_ = gl->helper()->flush_generation();
 164   gl->helper()->EndQueryEXT(target(), submit_count());
 165   MarkAsPending(gl->helper()->InsertToken());
 166 }
 167
 168 void QueryTracker::Query::QueryCounter(GLES2Implementation* gl) {
 169   MarkAsActive();
 170   flush_count_ = gl->helper()->flush_generation();
 171   gl->helper()->QueryCounterEXT(id(), target(), shm_id(), shm_offset(),
 172                                 submit_count());
 173   MarkAsPending(gl->helper()->InsertToken());
 174 }
 175
 176 bool QueryTracker::Query::CheckResultsAvailable(
 177     CommandBufferHelper* helper) {
 178   if (Pending()) {
 179     if (base::subtle::Acquire_Load(&info_.sync->process_count) ==
 180             submit_count_ ||
 181         helper->IsContextLost()) {
 182       switch (target()) {
 183         case GL_COMMANDS_ISSUED_CHROMIUM:
 184           result_ = info_.sync->result;
 185           break;
 186         case GL_LATENCY_QUERY_CHROMIUM:
 187           // Disabled DCHECK because of http://crbug.com/419236.
 188           //DCHECK(info_.sync->result >= client_begin_time_us_);
 189           result_ = info_.sync->result - client_begin_time_us_;
 190           break;
 191         case GL_ASYNC_PIXEL_PACK_COMPLETED_CHROMIUM:
 192         default:
 193           result_ = info_.sync->result;
 194           break;
 195       }
 196       state_ = kComplete;
 197     } else {
 198       if ((helper->flush_generation() - flush_count_ - 1) >= 0x80000000) {
 199         helper->Flush();
 200       } else {
 201         // Insert no-ops so that eventually the GPU process will see more work.
 202         helper->Noop(1);
 203       }
 204     }
 205   }
 206   return state_ == kComplete;
 207 }
 208
 209 uint64 QueryTracker::Query::GetResult() const {
 210   DCHECK(state_ == kComplete || state_ == kUninitialized);
 211   return result_;
 212 }
 213
 214 QueryTracker::QueryTracker(MappedMemoryManager* manager)
 215     : query_sync_manager_(manager),
 216       mapped_memory_(manager),
 217       disjoint_count_sync_shm_id_(-1),
 218       disjoint_count_sync_shm_offset_(0),
 219       disjoint_count_sync_(nullptr),
 220       local_disjoint_count_(0) {
 221 }
 222
 223 QueryTracker::~QueryTracker() {
 224   while (!queries_.empty()) {
 225     delete queries_.begin()->second;
 226     queries_.erase(queries_.begin());
 227   }
 228   while (!removed_queries_.empty()) {
 229     delete removed_queries_.front();
 230     removed_queries_.pop_front();
 231   }
 232   if (disjoint_count_sync_) {
 233     mapped_memory_->Free(disjoint_count_sync_);
 234     disjoint_count_sync_ = nullptr;
 235   }
 236 }
 237
 238 QueryTracker::Query* QueryTracker::CreateQuery(GLuint id, GLenum target) {
 239   DCHECK_NE(0u, id);
 240   FreeCompletedQueries();
 241   QuerySyncManager::QueryInfo info;
 242   if (!query_sync_manager_.Alloc(&info)) {
 243     return nullptr;
 244   }
 245   Query* query = new Query(id, target, info);
 246   std::pair<QueryIdMap::iterator, bool> result =
 247       queries_.insert(std::make_pair(id, query));
 248   DCHECK(result.second);
 249   return query;
 250 }
 251
 252 QueryTracker::Query* QueryTracker::GetQuery(GLuint client_id) {
 253   QueryIdMap::iterator it = queries_.find(client_id);
 254   return it != queries_.end() ? it->second : nullptr;
 255 }
 256
 257 QueryTracker::Query* QueryTracker::GetCurrentQuery(GLenum target) {
 258   QueryTargetMap::iterator it = current_queries_.find(target);
 259   return it != current_queries_.end() ? it->second : nullptr;
 260 }
 261
 262 void QueryTracker::RemoveQuery(GLuint client_id) {
 263   QueryIdMap::iterator it = queries_.find(client_id);
 264   if (it != queries_.end()) {
 265     Query* query = it->second;
 266
 267     // Erase from current targets map if it is the current target.
 268     const GLenum target = query->target();
 269     QueryTargetMap::iterator target_it = current_queries_.find(target);
 270     if (target_it != current_queries_.end() && target_it->second == query) {
 271       current_queries_.erase(target_it);
 272     }
 273
 274     // When you delete a query you can't mark its memory as unused until it's
 275     // completed.
 276     // Note: If you don't do this you won't mess up the service but you will
 277     // mess up yourself.
 278     removed_queries_.push_back(query);
 279     queries_.erase(it);
 280     FreeCompletedQueries();
 281   }
 282 }
 283
 284 void QueryTracker::Shrink() {
 285   FreeCompletedQueries();
 286   query_sync_manager_.Shrink();
 287 }
 288
 289 void QueryTracker::FreeCompletedQueries() {
 290   QueryList::iterator it = removed_queries_.begin();
 291   while (it != removed_queries_.end()) {
 292     Query* query = *it;
 293     if (query->Pending() &&
 294         base::subtle::Acquire_Load(&query->info_.sync->process_count) !=
 295             query->submit_count()) {
 296       ++it;
 297       continue;
 298     }
 299
 300     query_sync_manager_.Free(query->info_);
 301     it = removed_queries_.erase(it);
 302     delete query;
 303   }
 304 }
 305
 306 bool QueryTracker::BeginQuery(GLuint id, GLenum target,
 307                               GLES2Implementation* gl) {
 308   QueryTracker::Query* query = GetQuery(id);
 309   if (!query) {
 310     query = CreateQuery(id, target);
 311     if (!query) {
 312       gl->SetGLError(GL_OUT_OF_MEMORY,
 313                      "glBeginQueryEXT",
 314                      "transfer buffer allocation failed");
 315       return false;
 316     }
 317   } else if (query->target() != target) {
 318     gl->SetGLError(GL_INVALID_OPERATION,
 319                    "glBeginQueryEXT",
 320                    "target does not match");
 321     return false;
 322   }
 323
 324   current_queries_[query->target()] = query;
 325   query->Begin(gl);
 326   return true;
 327 }
 328
 329 bool QueryTracker::EndQuery(GLenum target, GLES2Implementation* gl) {
 330   QueryTargetMap::iterator target_it = current_queries_.find(target);
 331   if (target_it == current_queries_.end()) {
 332     gl->SetGLError(GL_INVALID_OPERATION,
 333                    "glEndQueryEXT", "no active query");
 334     return false;
 335   }
 336
 337   target_it->second->End(gl);
 338   current_queries_.erase(target_it);
 339   return true;
 340 }
 341
 342 bool QueryTracker::QueryCounter(GLuint id, GLenum target,
 343                                 GLES2Implementation* gl) {
 344   QueryTracker::Query* query = GetQuery(id);
 345   if (!query) {
 346     query = CreateQuery(id, target);
 347     if (!query) {
 348       gl->SetGLError(GL_OUT_OF_MEMORY,
 349                      "glQueryCounterEXT",
 350                      "transfer buffer allocation failed");
 351       return false;
 352     }
 353   } else if (query->target() != target) {
 354     gl->SetGLError(GL_INVALID_OPERATION,
 355                    "glQueryCounterEXT",
 356                    "target does not match");
 357     return false;
 358   }
 359
 360   query->QueryCounter(gl);
 361   return true;
 362 }
 363
 364 bool QueryTracker::SetDisjointSync(GLES2Implementation* gl) {
 365   if (!disjoint_count_sync_) {
 366     // Allocate memory for disjoint value sync.
 367     int32_t shm_id = -1;
 368     uint32_t shm_offset;
 369     void* mem = mapped_memory_->Alloc(sizeof(*disjoint_count_sync_),
 370                                       &shm_id,
 371                                       &shm_offset);
 372     if (mem) {
 373       disjoint_count_sync_shm_id_ = shm_id;
 374       disjoint_count_sync_shm_offset_ = shm_offset;
 375       disjoint_count_sync_ = static_cast<DisjointValueSync*>(mem);
 376       disjoint_count_sync_->Reset();
 377       gl->helper()->SetDisjointValueSyncCHROMIUM(shm_id, shm_offset);
 378     }
 379   }
 380   return disjoint_count_sync_ != nullptr;
 381 }
 382
 383 bool QueryTracker::CheckAndResetDisjoint() {
 384   if (disjoint_count_sync_) {
 385     const uint32_t disjoint_count = disjoint_count_sync_->GetDisjointCount();
 386     if (local_disjoint_count_ != disjoint_count) {
 387       local_disjoint_count_ = disjoint_count;
 388       return true;
 389     }
 390   }
 391   return false;
 392 }
 393
 394 }  // namespace gles2
 395 }  // namespace gpu