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 bool QueryTracker::Query::CheckResultsAvailable(
 170     CommandBufferHelper* helper) {
 171   if (Pending()) {
 172     if (base::subtle::Acquire_Load(&info_.sync->process_count) ==
 173             submit_count_ ||
 174         helper->IsContextLost()) {
 175       switch (target()) {
 176         case GL_COMMANDS_ISSUED_CHROMIUM:
 177           result_ = base::saturated_cast<uint32>(info_.sync->result);
 178           break;
 179         case GL_LATENCY_QUERY_CHROMIUM:
 180           // Disabled DCHECK because of http://crbug.com/419236.
 181           //DCHECK(info_.sync->result >= client_begin_time_us_);
 182           result_ = base::saturated_cast<uint32>(
 183               info_.sync->result - client_begin_time_us_);
 184           break;
 185         case GL_ASYNC_PIXEL_UNPACK_COMPLETED_CHROMIUM:
 186         case GL_ASYNC_PIXEL_PACK_COMPLETED_CHROMIUM:
 187         default:
 188           result_ = static_cast<uint32>(info_.sync->result);
 189           break;
 190       }
 191       state_ = kComplete;
 192     } else {
 193       if ((helper->flush_generation() - flush_count_ - 1) >= 0x80000000) {
 194         helper->Flush();
 195       } else {
 196         // Insert no-ops so that eventually the GPU process will see more work.
 197         helper->Noop(1);
 198       }
 199     }
 200   }
 201   return state_ == kComplete;
 202 }
 203
 204 uint32 QueryTracker::Query::GetResult() const {
 205   DCHECK(state_ == kComplete || state_ == kUninitialized);
 206   return result_;
 207 }
 208
 209 QueryTracker::QueryTracker(MappedMemoryManager* manager)
 210     : query_sync_manager_(manager) {
 211 }
 212
 213 QueryTracker::~QueryTracker() {
 214   while (!queries_.empty()) {
 215     delete queries_.begin()->second;
 216     queries_.erase(queries_.begin());
 217   }
 218   while (!removed_queries_.empty()) {
 219     delete removed_queries_.front();
 220     removed_queries_.pop_front();
 221   }
 222 }
 223
 224 QueryTracker::Query* QueryTracker::CreateQuery(GLuint id, GLenum target) {
 225   DCHECK_NE(0u, id);
 226   FreeCompletedQueries();
 227   QuerySyncManager::QueryInfo info;
 228   if (!query_sync_manager_.Alloc(&info)) {
 229     return NULL;
 230   }
 231   Query* query = new Query(id, target, info);
 232   std::pair<QueryMap::iterator, bool> result =
 233       queries_.insert(std::make_pair(id, query));
 234   DCHECK(result.second);
 235   return query;
 236 }
 237
 238 QueryTracker::Query* QueryTracker::GetQuery(
 239     GLuint client_id) {
 240   QueryMap::iterator it = queries_.find(client_id);
 241   return it != queries_.end() ? it->second : NULL;
 242 }
 243
 244 void QueryTracker::RemoveQuery(GLuint client_id) {
 245   QueryMap::iterator it = queries_.find(client_id);
 246   if (it != queries_.end()) {
 247     Query* query = it->second;
 248     // When you delete a query you can't mark its memory as unused until it's
 249     // completed.
 250     // Note: If you don't do this you won't mess up the service but you will
 251     // mess up yourself.
 252     removed_queries_.push_back(query);
 253     queries_.erase(it);
 254     FreeCompletedQueries();
 255   }
 256 }
 257
 258 void QueryTracker::Shrink() {
 259   FreeCompletedQueries();
 260   query_sync_manager_.Shrink();
 261 }
 262
 263 void QueryTracker::FreeCompletedQueries() {
 264   QueryList::iterator it = removed_queries_.begin();
 265   while (it != removed_queries_.end()) {
 266     Query* query = *it;
 267     if (query->Pending() &&
 268         base::subtle::Acquire_Load(&query->info_.sync->process_count) !=
 269             query->submit_count()) {
 270       ++it;
 271       continue;
 272     }
 273
 274     query_sync_manager_.Free(query->info_);
 275     it = removed_queries_.erase(it);
 276     delete query;
 277   }
 278 }
 279
 280 }  // namespace gles2
 281 }  // namespace gpu