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      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 // This file contains the GPUTrace class.
      6 #ifndef GPU_COMMAND_BUFFER_SERVICE_GPU_TRACER_H_
      7 #define GPU_COMMAND_BUFFER_SERVICE_GPU_TRACER_H_
      8 
      9 #include <string>
     10 
     11 #include "base/basictypes.h"
     12 #include "base/memory/scoped_ptr.h"
     13 #include "base/memory/weak_ptr.h"
     14 #include "base/threading/thread.h"
     15 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
     16 #include "gpu/gpu_export.h"
     17 #include "ui/gl/gl_bindings.h"
     18 
     19 namespace gpu {
     20 namespace gles2 {
     21 
     22 class Outputter;
     23 class GPUTrace;
     24 
     25 // Id used to keep trace namespaces separate
     26 enum GpuTracerSource {
     27   kTraceGroupInvalid = -1,
     28 
     29   kTraceGroupMarker = 0,
     30   kTraceCHROMIUM = 1,
     31   kTraceDecoder = 2,
     32 
     33   NUM_TRACER_SOURCES
     34 };
     35 
     36 enum GpuTracerType {
     37   kTracerTypeInvalid = -1,
     38 
     39   kTracerTypeARBTimer,
     40   kTracerTypeDisjointTimer
     41 };
     42 
     43 // Marker structure for a Trace.
     44 struct TraceMarker {
     45   TraceMarker(const std::string& name);
     46   ~TraceMarker();
     47 
     48   std::string name_;
     49   scoped_refptr<GPUTrace> trace_;
     50 };
     51 
     52 // Traces GPU Commands.
     53 class GPUTracer : public base::SupportsWeakPtr<GPUTracer> {
     54  public:
     55   explicit GPUTracer(gles2::GLES2Decoder* decoder);
     56   ~GPUTracer();
     57 
     58   // Scheduled processing in decoder begins.
     59   bool BeginDecoding();
     60 
     61   // Scheduled processing in decoder ends.
     62   bool EndDecoding();
     63 
     64   // Begin a trace marker.
     65   bool Begin(const std::string& name, GpuTracerSource source);
     66 
     67   // End the last started trace marker.
     68   bool End(GpuTracerSource source);
     69 
     70   bool IsTracing();
     71 
     72   // Retrieve the name of the current open trace.
     73   // Returns empty string if no current open trace.
     74   const std::string& CurrentName() const;
     75 
     76  private:
     77   // Trace Processing.
     78   scoped_refptr<GPUTrace> CreateTrace(const std::string& name);
     79   void Process();
     80   void ProcessTraces();
     81 
     82   void CalculateTimerOffset();
     83   void IssueProcessTask();
     84 
     85   scoped_refptr<Outputter> outputter_;
     86   std::vector<TraceMarker> markers_[NUM_TRACER_SOURCES];
     87   std::deque<scoped_refptr<GPUTrace> > traces_;
     88 
     89   const unsigned char* gpu_trace_srv_category;
     90   const unsigned char* gpu_trace_dev_category;
     91   gles2::GLES2Decoder* decoder_;
     92 
     93   int64 timer_offset_;
     94   GpuTracerSource last_tracer_source_;
     95 
     96   GpuTracerType tracer_type_;
     97   bool gpu_timing_synced_;
     98   bool gpu_executing_;
     99   bool process_posted_;
    100 
    101   DISALLOW_COPY_AND_ASSIGN(GPUTracer);
    102 };
    103 
    104 class Outputter : public base::RefCounted<Outputter> {
    105  public:
    106   virtual void Trace(const std::string& name,
    107                      int64 start_time,
    108                      int64 end_time) = 0;
    109 
    110  protected:
    111   virtual ~Outputter() {}
    112   friend class base::RefCounted<Outputter>;
    113 };
    114 
    115 class TraceOutputter : public Outputter {
    116  public:
    117   static scoped_refptr<TraceOutputter> Create(const std::string& name);
    118   virtual void Trace(const std::string& name,
    119                      int64 start_time,
    120                      int64 end_time) OVERRIDE;
    121 
    122  protected:
    123   friend class base::RefCounted<Outputter>;
    124   explicit TraceOutputter(const std::string& name);
    125   virtual ~TraceOutputter();
    126 
    127   base::Thread named_thread_;
    128   uint64 local_trace_id_;
    129 
    130   DISALLOW_COPY_AND_ASSIGN(TraceOutputter);
    131 };
    132 
    133 class GPU_EXPORT GPUTrace
    134     : public base::RefCounted<GPUTrace> {
    135  public:
    136   GPUTrace(scoped_refptr<Outputter> outputter,
    137            const std::string& name,
    138            int64 offset,
    139            GpuTracerType tracer_type);
    140 
    141   bool IsEnabled() { return tracer_type_ != kTracerTypeInvalid; }
    142   const std::string& name() { return name_; }
    143 
    144   void Start();
    145   void End();
    146   bool IsAvailable();
    147   void Process();
    148 
    149  private:
    150   ~GPUTrace();
    151 
    152   void Output();
    153 
    154   friend class base::RefCounted<GPUTrace>;
    155 
    156   std::string name_;
    157   scoped_refptr<Outputter> outputter_;
    158 
    159   int64 offset_;
    160   int64 start_time_;
    161   int64 end_time_;
    162   GpuTracerType tracer_type_;
    163   bool end_requested_;
    164 
    165   GLuint queries_[2];
    166 
    167   DISALLOW_COPY_AND_ASSIGN(GPUTrace);
    168 };
    169 
    170 }  // namespace gles2
    171 }  // namespace gpu
    172 
    173 #endif  // GPU_COMMAND_BUFFER_SERVICE_GPU_TRACER_H_
    174