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_UNPACK_COMPLETED_CHROMIUM:
 137     case GL_ASYNC_PIXEL_PACK_COMPLETED_CHROMIUM:
 138     default:
 139       // tell service about id, shared memory and count
 140       gl->helper()->BeginQueryEXT(target(), id(), shm_id(), shm_offset());
 141       break;
 142   }
 143 }
 144
 145 void QueryTracker::Query::End(GLES2Implementation* gl) {
 146   switch (target()) {
 147     case GL_GET_ERROR_QUERY_CHROMIUM: {
 148       GLenum error = gl->GetClientSideGLError();
 149       if (error == GL_NO_ERROR) {
 150         // There was no error so start the query on the service.
 151         // it will end immediately.
 152         gl->helper()->BeginQueryEXT(target(), id(), shm_id(), shm_offset());
 153       } else {
 154         // There's an error on the client, no need to bother the service. Just
 155         // set the query as completed and return the error.
 156         if (error != GL_NO_ERROR) {
 157           state_ = kComplete;
 158           result_ = error;
 159           return;
 160         }
 161       }
 162     }
 163   }
 164   flush_count_ = gl->helper()->flush_generation();
 165   gl->helper()->EndQueryEXT(target(), submit_count());
 166   MarkAsPending(gl->helper()->InsertToken());
 167 }
 168
 169 void QueryTracker::Query::QueryCounter(GLES2Implementation* gl) {
 170   MarkAsActive();
 171   flush_count_ = gl->helper()->flush_generation();
 172   gl->helper()->QueryCounterEXT(target(), id(), shm_id(), shm_offset(),
 173                                 submit_count());
 174   MarkAsPending(gl->helper()->InsertToken());
 175 }
 176
 177 bool QueryTracker::Query::CheckResultsAvailable(
 178     CommandBufferHelper* helper) {
 179   if (Pending()) {
 180     if (base::subtle::Acquire_Load(&info_.sync->process_count) ==
 181             submit_count_ ||
 182         helper->IsContextLost()) {
 183       switch (target()) {
 184         case GL_COMMANDS_ISSUED_CHROMIUM:
 185           result_ = info_.sync->result;
 186           break;
 187         case GL_LATENCY_QUERY_CHROMIUM:
 188           // Disabled DCHECK because of http://crbug.com/419236.
 189           //DCHECK(info_.sync->result >= client_begin_time_us_);
 190           result_ = info_.sync->result - client_begin_time_us_;
 191           break;
 192         case GL_ASYNC_PIXEL_UNPACK_COMPLETED_CHROMIUM:
 193         case GL_ASYNC_PIXEL_PACK_COMPLETED_CHROMIUM:
 194         default:
 195           result_ = info_.sync->result;
 196           break;
 197       }
 198       state_ = kComplete;
 199     } else {
 200       if ((helper->flush_generation() - flush_count_ - 1) >= 0x80000000) {
 201         helper->Flush();
 202       } else {
 203         // Insert no-ops so that eventually the GPU process will see more work.
 204         helper->Noop(1);
 205       }
 206     }
 207   }
 208   return state_ == kComplete;
 209 }
 210
 211 uint64 QueryTracker::Query::GetResult() const {
 212   DCHECK(state_ == kComplete || state_ == kUninitialized);
 213   return result_;
 214 }
 215
 216 QueryTracker::QueryTracker(MappedMemoryManager* manager)
 217     : query_sync_manager_(manager) {
 218 }
 219
 220 QueryTracker::~QueryTracker() {
 221   while (!queries_.empty()) {
 222     delete queries_.begin()->second;
 223     queries_.erase(queries_.begin());
 224   }
 225   while (!removed_queries_.empty()) {
 226     delete removed_queries_.front();
 227     removed_queries_.pop_front();
 228   }
 229 }
 230
 231 QueryTracker::Query* QueryTracker::CreateQuery(GLuint id, GLenum target) {
 232   DCHECK_NE(0u, id);
 233   FreeCompletedQueries();
 234   QuerySyncManager::QueryInfo info;
 235   if (!query_sync_manager_.Alloc(&info)) {
 236     return nullptr;
 237   }
 238   Query* query = new Query(id, target, info);
 239   std::pair<QueryIdMap::iterator, bool> result =
 240       queries_.insert(std::make_pair(id, query));
 241   DCHECK(result.second);
 242   return query;
 243 }
 244
 245 QueryTracker::Query* QueryTracker::GetQuery(GLuint client_id) {
 246   QueryIdMap::iterator it = queries_.find(client_id);
 247   return it != queries_.end() ? it->second : nullptr;
 248 }
 249
 250 QueryTracker::Query* QueryTracker::GetCurrentQuery(GLenum target) {
 251   QueryTargetMap::iterator it = current_queries_.find(target);
 252   return it != current_queries_.end() ? it->second : nullptr;
 253 }
 254
 255 void QueryTracker::RemoveQuery(GLuint client_id) {
 256   QueryIdMap::iterator it = queries_.find(client_id);
 257   if (it != queries_.end()) {
 258     Query* query = it->second;
 259
 260     // Erase from current targets map if it is the current target.
 261     const GLenum target = query->target();
 262     QueryTargetMap::iterator target_it = current_queries_.find(target);
 263     if (target_it != current_queries_.end() && target_it->second == query) {
 264       current_queries_.erase(target_it);
 265     }
 266
 267     // When you delete a query you can't mark its memory as unused until it's
 268     // completed.
 269     // Note: If you don't do this you won't mess up the service but you will
 270     // mess up yourself.
 271     removed_queries_.push_back(query);
 272     queries_.erase(it);
 273     FreeCompletedQueries();
 274   }
 275 }
 276
 277 void QueryTracker::Shrink() {
 278   FreeCompletedQueries();
 279   query_sync_manager_.Shrink();
 280 }
 281
 282 void QueryTracker::FreeCompletedQueries() {
 283   QueryList::iterator it = removed_queries_.begin();
 284   while (it != removed_queries_.end()) {
 285     Query* query = *it;
 286     if (query->Pending() &&
 287         base::subtle::Acquire_Load(&query->info_.sync->process_count) !=
 288             query->submit_count()) {
 289       ++it;
 290       continue;
 291     }
 292
 293     query_sync_manager_.Free(query->info_);
 294     it = removed_queries_.erase(it);
 295     delete query;
 296   }
 297 }
 298
 299 bool QueryTracker::BeginQuery(GLuint id, GLenum target,
 300                               GLES2Implementation* gl) {
 301   QueryTracker::Query* query = GetQuery(id);
 302   if (!query) {
 303     query = CreateQuery(id, target);
 304     if (!query) {
 305       gl->SetGLError(GL_OUT_OF_MEMORY,
 306                      "glBeginQueryEXT",
 307                      "transfer buffer allocation failed");
 308       return false;
 309     }
 310   } else if (query->target() != target) {
 311     gl->SetGLError(GL_INVALID_OPERATION,
 312                    "glBeginQueryEXT",
 313                    "target does not match");
 314     return false;
 315   }
 316
 317   current_queries_[query->target()] = query;
 318   query->Begin(gl);
 319   return true;
 320 }
 321
 322 bool QueryTracker::EndQuery(GLenum target, GLES2Implementation* gl) {
 323   QueryTargetMap::iterator target_it = current_queries_.find(target);
 324   if (target_it == current_queries_.end()) {
 325     gl->SetGLError(GL_INVALID_OPERATION,
 326                    "glEndQueryEXT", "no active query");
 327     return false;
 328   }
 329
 330   target_it->second->End(gl);
 331   current_queries_.erase(target_it);
 332   return true;
 333 }
 334
 335 bool QueryTracker::QueryCounter(GLuint id, GLenum target,
 336                                 GLES2Implementation* gl) {
 337   QueryTracker::Query* query = GetQuery(id);
 338   if (!query) {
 339     query = CreateQuery(id, target);
 340     if (!query) {
 341       gl->SetGLError(GL_OUT_OF_MEMORY,
 342                      "glQueryCounterEXT",
 343                      "transfer buffer allocation failed");
 344       return false;
 345     }
 346   } else if (query->target() != target) {
 347     gl->SetGLError(GL_INVALID_OPERATION,
 348                    "glQueryCounterEXT",
 349                    "target does not match");
 350     return false;
 351   }
 352
 353   query->QueryCounter(gl);
 354   return true;
 355 }
 356
 357 }  // namespace gles2
 358 }  // namespace gpu