vm/sampling_profiler.hpp

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