vm/sampling_profiler.hpp

   1 namespace factor {
   2
   3 struct profiling_sample {
   4   // Active thread during sample
   5   cell thread;
   6   // The callstack at safepoint time. Indexes to the beginning and ending
   7   // word entries in the vm sample_callstacks array.
   8   cell callstack_begin, callstack_end;
   9
  10   // Number of samples taken before the safepoint that recorded the sample
  11   fixnum sample_count;
  12   // Number of samples taken during GC
  13   fixnum gc_sample_count;
  14   // Number of samples taken during unoptimized compiler
  15   fixnum jit_sample_count;
  16   // Number of samples taken during foreign code execution
  17   fixnum foreign_sample_count;
  18   // Number of samples taken during code execution in non-Factor threads
  19   fixnum foreign_thread_sample_count;
  20
  21   profiling_sample(fixnum sample_count, fixnum gc_sample_count,
  22                    fixnum jit_sample_count, fixnum foreign_sample_count,
  23                    fixnum foreign_thread_sample_count)
  24       : thread(0),
  25         callstack_begin(0),
  26         callstack_end(0),
  27         sample_count(sample_count),
  28         gc_sample_count(gc_sample_count),
  29         jit_sample_count(jit_sample_count),
  30         foreign_sample_count(foreign_sample_count),
  31         foreign_thread_sample_count(foreign_thread_sample_count) {}
  32
  33   profiling_sample record_counts() volatile;
  34   void clear_counts() volatile;
  35   bool empty() const {
  36     return sample_count + gc_sample_count + jit_sample_count +
  37                foreign_sample_count + foreign_thread_sample_count ==
  38            0;
  39   }
  40 };
  41
  42 }