vm/sampling_profiler.hpp

   1 namespace factor
   2 {
   3
   4 struct profiling_sample_count
   5 {
   6         // Number of samples taken before the safepoint that recorded the sample
   7         fixnum sample_count;
   8         // Number of samples taken during GC
   9         fixnum gc_sample_count;
  10         // Number of samples taken during unoptimized compiler
  11         fixnum jit_sample_count;
  12         // Number of samples taken during foreign code execution
  13         fixnum foreign_sample_count;
  14         // Number of samples taken during code execution in non-Factor threads
  15         fixnum foreign_thread_sample_count;
  16
  17         profiling_sample_count() :
  18                 sample_count(0),
  19                 gc_sample_count(0),
  20                 jit_sample_count(0),
  21                 foreign_sample_count(0),
  22                 foreign_thread_sample_count(0) {}
  23
  24         profiling_sample_count(fixnum sample_count,
  25                 fixnum gc_sample_count,
  26                 fixnum jit_sample_count,
  27                 fixnum foreign_sample_count,
  28                 fixnum foreign_thread_sample_count) :
  29                 sample_count(sample_count),
  30                 gc_sample_count(gc_sample_count),
  31                 jit_sample_count(jit_sample_count),
  32                 foreign_sample_count(foreign_sample_count),
  33                 foreign_thread_sample_count(foreign_thread_sample_count) {}
  34
  35         bool empty() const
  36         {
  37                 return sample_count
  38                         + gc_sample_count
  39                         + jit_sample_count
  40                         + foreign_sample_count
  41                         + foreign_thread_sample_count == 0;
  42         }
  43
  44         profiling_sample_count record_counts() volatile;
  45         void clear() volatile;
  46 };
  47
  48 struct profiling_sample
  49 {
  50         // Sample counts
  51         profiling_sample_count counts;
  52         // Active thread during sample
  53         cell thread;
  54         /* The callstack at safepoint time. Indexes to the beginning and ending
  55         code_block entries in the vm sample_callstacks array. */
  56         cell callstack_begin, callstack_end;
  57
  58         profiling_sample(factor_vm *vm,
  59                 bool prolog_p,
  60                 profiling_sample_count const &counts,
  61                 cell thread);
  62 };
  63
  64 }